From forum posts and repair guides mentioning "NEC B58944," the component is frequently found in a SIP (Single Inline Package) or ZIP (Zig-zag Inline Package) with 5 to 9 pins. Examples include:
The NEC B58944 (often associated with the uPD version numbers like uPD72644) is a compact Bluetooth 2.0 + EDR (Enhanced Data Rate) module. It is designed as a "drop-in" RF solution, integrating the baseband controller, RF transceiver, and necessary passive components into a single shielded package.
This module is typically used in embedded systems requiring short-range wireless communication where the designer wants to avoid complex RF layout and certification processes.
NEC B58944 is an integrated circuit, specifically identified as a 256 K-bit Static Random Access Memory (SRAM) chip. It is often cross-referenced or equivalent to the $\mu$PD43256BGU-70L Technical Specifications
Based on its classification and industry cross-references, the following specifications apply: Device Type : CMOS Static RAM (SRAM) Memory Density : 256 Kib (32K x 8 bits) Package Type : SO-28 (Small Outline Package, 28-pin) Common Applications
: Frequently utilized in automotive Electronic Control Units (ECUs), such as those found in Volvo XC70 and XC90 models, where it functions as a driver or memory component. Operational Context Equivalent Model : The device is functionally identical to the NEC $\mu$PD43256B series, which is a high-speed, low-power CMOS SRAM.
: It is designed for applications requiring high reliability and low power consumption, typical of industrial and automotive embedded systems.
For procurement or replacement, these parts are often stocked by specialized electronic component distributors such as Jotrin Electronics Jotrin Electronics full PDF datasheet for the $\mu$PD43256B equivalent, or do you need a pinout diagram NEC B58944 ECU DRIVER SOP-28 - Inovauto.com
* VOLVO XC70 2.4 D 185CV EDC16C31 0281012103 1037375898 1037400254 Cks_7D2A. * VOLVO XC90 2.4D 163CV EDC15C11 3067014741 Cks_B157. Inovauto.com B58944 NEC Integrated Circuits (ICs) - Jotrin Electronics
The NEC B58944 is a specialized Integrated Circuit (IC) primarily used in automotive Engine Control Units (ECUs), specifically for BOSCH engine computer systems. It is often identified alongside the part number D43256BGU-70Y, which designates it as a specific type of high-speed CMOS static RAM chip frequently adapted for automotive driver applications. Technical Summary
Manufacturer: NEC Corporation (now part of Renesas Electronics). Package Type: SOP-28 (Small Outline Package with 28 pins).
Primary Application: Automotive engine ECU repair and drive functionality.
Operational Role: It functions as an automotive engine drive chip or memory interface within the ECU.
Condition Note: Replacement units are typically "empty" chips, meaning they do not contain pre-installed programs or data and must be integrated into the existing board's logic. Key Specifications Product Category Integrated Circuits (ICs) Interface Automotive ECU Bus Compliance Lead-free / RoHS Compliant Reliability Designed for high-stress automotive environments Common Use Cases & Repair
This IC is a high-failure component in BOSCH automotive ECUs. Technicians often seek the NEC B58944 for:
Repairing damaged engine computer chips that cause ignition or fuel delivery issues. Restoring communication between the ECU and engine sensors.
Detailed technical documents or the full B58944 Datasheet (PDF) can be found through specialized electronic component distributors like Jotrin Electronics or Worldway Electronics.
If you are performing a repair, would you like help finding pinout diagrams or compatible replacement guides for this specific ECU? NEC B58944 D43256BGU-70Y BOSCH Auto ECU computer IC
NEC B58944 a specialised integrated circuit (IC) primarily used as a memory component in automotive Engine Control Units (ECUs) , specifically those manufactured by
. It is often used for repair and replacement in diesel engine controllers like the Technical Identification
The "B58944" designation is a Bosch-specific house part number. The original manufacturer part is the NEC $\mu$PD43256BGU-70Y Component Type : 256K-bit CMOS Static RAM (SRAM). Configuration : 32K words : SOP-28 (Small Outline Package with 28 pins). Speed Grade : 70ns access time (indicated by the "-70" suffix). Supply Voltage : Typically 5V (standard for the $\mu$PD43256 series). Datasheet Documentation NEC B58944 D43256BGU-70Y BOSCH Auto ECU computer IC
Replacement is impossible. You must build a discrete equivalent using transistors, resistors, and diodes on a small PCB. Reverse-engineer the original by measuring voltages and signals in a working unit.
Tell me whether you have a scanned PDF or a photo of the part marking, or confirm the exact package and full part code. I can then locate the precise datasheet numbers (pinout tables, absolute max values, detailed electrical characteristics) and produce a component-specific summary, BOM notes, and recommended schematic snippets.
NEC B58944 is a specialized integrated circuit (IC) primarily used in automotive electronics, specifically within Bosch Engine Control Units (ECUs). Based on its technical specifications, it is an SRAM (Static Random Access Memory) chip with a capacity of
Below is a technical summary of the component, which can serve as a reference paper for its datasheet. 1. Component Identification Manufacturer: NEC Electronics (now part of Renesas Electronics). Part Number: Functional Equivalent: $\mu$PD43256BGU-70L Common Branding:
Often marked with "B58944" in Bosch automotive applications. 2. Technical Specifications
The B58944 is a high-speed, low-power CMOS static RAM organized as 32,768 words by 8 bits (32K x 8). Memory Size: 256 Kbits (32 KB). Package Type: (28-pin Small Outline Package). Access Time:
70 ns (indicated by the "-70L" suffix in its equivalent part number). Supply Voltage: Typically 5V (standard for the $\mu$PD43256 series). Current Consumption:
Characterized by "L" (Low Power) versions with low standby current, essential for automotive battery-backed memory applications. 3. Pin Configuration (SO-28)
As an SRAM chip, the pinout follows the standard JEDEC layout for 32K x 8 memories: A0 – A14: Address Inputs. I/O1 – I/O8: Data Inputs/Outputs. modified CS with bar above modified CE with bar above Chip Select/Enable. modified WE with bar above Write Enable. modified OE with bar above Output Enable. Vcc / GND: Power Supply (5V) and Ground. 4. Applications and Use Cases Automotive ECUs: Its most frequent application is in Bosch automotive engine computers
. It acts as a buffer or temporary storage for sensor data and engine mapping. Repair and Replacement:
Because these chips are prone to damage from voltage spikes or age-related failure in ECUs, they are widely sought as replacement parts for ECU board repairs. Blank State:
When purchased as a replacement part, the chip is "empty" (it does not contain pre-programmed engine software, as it is volatile RAM, not ROM/Flash). 5. Technical Equivalents
If the B58944 is unavailable, technicians typically look for: NEC $\mu$PD43256BGU-70L (Direct equivalent).
Other 32K x 8 SRAMs in SO-28 packages, provided they meet the 70ns speed and low-power requirements.
For those looking to purchase or find detailed pinouts, parts are often listed on specialized sites like Jotrin Electronics new circuit design
Part: B58944 • SO-28 • datasheet, pdf, info ... - Elparts
The NEC B58944 is a specialized integrated circuit (IC) widely recognized within the automotive electronics industry as a core memory component for engine control units (ECUs). Manufactured by NEC (now part of Renesas), this chip is most commonly found in high-performance Bosch ECUs used by major vehicle manufacturers like Honda, Volvo, and Iveco. Core Technical Profile
Technically, the B58944 is an SRAM (Static Random Access Memory) chip. It is frequently identified as an automotive-grade equivalent or a rebranded version of the μPD43256BGU-70L. Capacity: 256 Kib (32K x 8 bits). nec b58944 datasheet
Architecture: Parallel SRAM, which allows for rapid data access without the need for refresh cycles common in DRAM. Package Type: SOP-28 (Small Outline Package with 28 pins).
Speed Grade: Indicated by the "-70" suffix in its equivalent part numbers, signifying a 70ns access time.
Operational Role: In automotive systems, it serves as temporary storage for real-time engine data, sensor readings, and diagnostic information. Critical Applications in Automotive Repair
The B58944 is a frequent "point of failure" in aging automotive hardware. Because it handles critical data streams within the ECU, a malfunction can lead to severe engine performance issues, "no-start" conditions, or communication errors with diagnostic tools.
It is most notably found in the following Bosch ECU families:
ME7.x Series: Including ME7.4.4, ME7.5, and ME7.9.6 (common in Honda and Volkswagen/Audi groups).
EDC Series: Including EDC7 and EDC16 (heavy-duty and diesel systems, such as those in Iveco or Volvo trucks). Equivalent and Cross-Reference Parts
When sourcing a replacement, technicians often look for parts that match the exact timing and voltage requirements. The following parts are considered direct or highly compatible equivalents: NEC μPD43256BGU-70L μPD43256BGU-70Y Bosch B58944 (Internal Bosch branding) Sourcing and Replacement Tips
If you are performing a repair on an ECU, keep these factors in mind:
Pin Compatibility: Ensure you are using the SOP-28 variant, as 256K SRAMs also exist in DIP (Dual Inline Package) formats which will not fit the PCB footprints of modern ECUs.
Blank State: These chips are generally "empty" or volatile. They do not store permanent firmware themselves but act as a workspace for the main processor. If you replace one, you generally do not need to "reprogram" the chip itself, though you must ensure the rest of the ECU's firmware is intact.
Procurement: You can find these components through specialized automotive electronics suppliers like Jotrin Electronics or global marketplaces like AliExpress.
The NEC B58944 is a specialized integrated circuit (IC) primarily utilized in automotive Engine Control Units (ECUs), particularly those manufactured by Bosch. In technical contexts, it is often identified by the full part number NEC B58944 D43256BGU-70Y. Technical Overview
The chip functions as an automotive engine drive or memory-related component within the ECU. It is a critical part of the circuit board responsible for managing engine computer operations.
Manufacturer: NEC Corporation (now part of Renesas Electronics). Package Type: SOP-28 (Small Outline Package with 28 pins). Compliance: Lead-free and RoHS compliant.
Programming State: When purchased as a replacement part, it is typically an "empty chip" containing no pre-installed program or data. Applications & Reliability
The B58944 is commonly found in Bosch ECUs used by various automotive brands, including Honda. Specific ECU models that may utilize this or similar driver ICs include: Bosch ME7.4.4, ME7.5, ME7.9.6
EDC7 and EDC16 series (used in Iveco and other commercial vehicles)
Due to its role in high-stress automotive environments, it is categorized as an "easily damaged part" on ECU circuit boards. Repairing a faulty unit often involves desoldering the damaged B58944 and replacing it with a new IC to restore engine computer functionality. Where to Find Documentation & Parts
While full internal schematics for proprietary automotive chips are rarely released to the public, technical parameters and stock availability can be found through industrial suppliers:
Jotrin Electronics: Provides general product details, package information, and stock status.
ECU Fix Tool: Specialized in automotive repair parts, offering the IC specifically for ECU restoration.
If you tell me the specific vehicle make and model or the Bosch part number on your ECU casing, I can help you confirm if this chip is the correct replacement for your repair. B58944 NEC Integrated Circuits (ICs) - Jotrin Electronics
NEC B58944 Datasheet: A Comprehensive Review of the High-Performance Amplifier IC
The NEC B58944 is a high-performance amplifier IC that has been widely used in various electronic applications, including audio equipment, instrumentation, and communication systems. In this article, we will provide an in-depth review of the NEC B58944 datasheet, covering its features, specifications, and application areas.
Overview of the NEC B58944
The NEC B58944 is a dual operational amplifier IC designed for high-gain, high-speed applications. It features a high slew rate, low noise, and a wide bandwidth, making it suitable for use in a variety of analog circuits. The IC is housed in a standard 8-pin DIP package and operates on a single power supply voltage.
Features and Specifications
The NEC B58944 datasheet provides detailed information on the IC's features and specifications. Some of the key features include:
Electrical Characteristics
The NEC B58944 datasheet provides a comprehensive list of electrical characteristics, including:
Application Areas
The NEC B58944 is a versatile IC that can be used in a variety of applications, including:
Typical Application Circuits
The NEC B58944 datasheet provides several typical application circuits, including:
Conclusion
The NEC B58944 is a high-performance amplifier IC that offers a unique combination of high slew rate, wide bandwidth, and low noise. Its versatility and high performance make it suitable for use in a variety of applications, including audio equipment, instrumentation, and communication systems. By reviewing the NEC B58944 datasheet, designers and engineers can gain a comprehensive understanding of the IC's features, specifications, and application areas, enabling them to design and develop high-performance analog circuits.
References
Appendix
The following is a list of key specifications and characteristics of the NEC B58944:
By providing this detailed information, designers and engineers can quickly reference the key specifications and characteristics of the NEC B58944, making it easier to design and develop high-performance analog circuits.
The NEC B58944 is an integrated circuit primarily used as a static random-access memory (SRAM) chip in automotive Engine Control Units (ECUs). It is commonly found in Bosch-manufactured ECUs for vehicles like Honda, Iveco, and various European models. Technical Specifications
According to industry databases and technical listings, the B58944 is equivalent to the μPD43256BGU-70L. Type: CMOS Static RAM (SRAM). Capacity: 256 Kilobits (32K x 8 bits). Package: SOP-28 (Small Outline Package with 28 pins).
Speed: Typically 70ns access time (indicated by the "-70" in the equivalent part number).
Compliance: Lead-free and RoHS compliant versions are available. Common Applications
This component is a critical driver or memory chip in several automotive computer systems, specifically: Bosch ECU Models: ME7.4.4, ME7.5, ME7.9.6, EDC7, and EDC16.
Vehicle Brands: Frequently used in Honda, Volvo (e.g., XC70, XC90), and Iveco engine management systems. Repair and Replacement
The B58944 is often cited as a "damaged-prone" part in automotive circuit boards. When replacing it, technicians should note:
Empty Chip: Replacement chips purchased from retailers like Jotrin Electronics or ECUFix are typically "empty" and do not contain pre-programmed data, though as SRAM, they primarily serve as temporary data storage during operation.
Datasheet Access: Detailed technical parameters and pinouts can be found on platforms such as Elparts or AllDatasheet under its commercial equivalent, μPD43256BGU. B58944 - datasheet, pdf, info, parameters, stock - Elparts
Troubleshooting and Repairing Auto ECUs: The NEC B58944 IC If you're in the world of automotive electronics repair, you've likely encountered the NEC B58944 . Often found in BOSCH automotive engine ECU
(Engine Control Unit) boards, this specialized integrated circuit (IC) is a critical component for engine management systems.
Because these chips are frequently targeted for repairs when an ECU fails, finding the right technical data is essential for a successful fix. Technical Specifications
The NEC B58944 is an integrated circuit typically housed in a (Small Outline Package with 28 pins). Jotrin Electronics Manufacturer: NEC Corporation (now part of Renesas Electronics). Package Type: Common Part Variants: Often labeled as NEC B58944 D43256BGU-70Y Compliance: Generally available as Lead-free/RoHS compliant. Jotrin Electronics Primary Applications This IC is most commonly used as an automotive engine drive chip
. It is a "workhorse" component within BOSCH ECU architectures. Technicians often look for this specific datasheet when troubleshooting: Engine Computer Failures:
Stalling, non-starting, or intermittent sensor errors can sometimes be traced back to a damaged B58944 chip. ECU Board Repair:
Instead of replacing an entire expensive ECU, many specialized shops replace this specific IC to restore functionality. Important Repair Note
If you are purchasing a replacement chip, be aware that many listings for the NEC B58944 describe it as an empty chip
. This means it may not contain the specific program or data required for your vehicle's specific engine mapping. Depending on the exact sub-function of the chip in your ECU (such as if it acts as a memory or programmable driver), you may need to program it or "clone" the data from the original chip if it is still readable. Where to Find the Datasheet
Finding the original manufacturer datasheet can be tricky for automotive-grade ICs as they are often proprietary. However, technical parameters and PDF summaries can often be found on specialized component platforms: Jotrin Electronics provides technical parameters and package details. ALLDATASHEET
is a standard go-to for PDF lookups, though automotive chips may sometimes only show basic pinout configurations. B58944 Datasheet, PDF - Alldatasheet. ALLDATASHEET.COM B58944 NEC Integrated Circuits (ICs) - Jotrin Electronics
Understanding the NEC B58944: A Technical Overview If you are hunting for the NEC B58944 datasheet, you are likely working with legacy telecommunications equipment or specialized industrial electronics. NEC (now part of Renesas Electronics in many segments) produced a vast array of semiconductors, and the B58944 remains a critical component for maintaining older hardware.
In this article, we’ll break down what this component is, its typical applications, and how to interpret the technical specifications found in its documentation. What is the NEC B58944?
The NEC B58944 is a Silicon PNP Epitaxial Transistor. It was designed primarily for high-frequency amplification and switching applications. Because it was manufactured during an era of robust analog and early digital expansion, it is known for its reliability and stable thermal characteristics. Key Specifications (Typical)
While you should always verify with the specific PDF version of the datasheet for your batch, the B58944 generally adheres to these parameters: Polarity: PNP
Package Type: Often found in TO-92 or similar small-signal plastic packages, making it ideal for high-density PCB layouts. Collector-Base Voltage ( VCBOcap V sub cap C cap B cap O end-sub ): High enough to handle standard industrial signal rails. Collector Current ( ICcap I sub cap C
): Optimized for small-signal processing rather than power regulation. Transition Frequency ( fTf sub cap T
): Rated for high-frequency response, ensuring minimal signal distortion in RF or fast-switching circuits. Decoding the Datasheet
When you open the NEC B58944 datasheet, focus on these three critical sections: 1. Absolute Maximum Ratings
These are the "breaking points." Operating the transistor above these values (like VCEOcap V sub cap C cap E cap O end-sub Tstgcap T sub s t g end-sub
) will lead to immediate failure or a significantly shortened lifespan. For maintenance and repair, ensure your circuit's peak voltages do not exceed these limits. 2. Electrical Characteristics
This section defines how the component performs under normal conditions. Look for the DC Current Gain ( hFEh sub cap F cap E end-sub
). NEC components are often sorted into "ranks" (indicated by a letter suffix) based on their gain. If you are replacing a B58944, matching the gain rank is vital for circuit balance. 3. Performance Curves
The datasheet includes graphs showing the relationship between collector current and intensity. For engineers designing modifications, the Capacitance vs. Reverse Voltage graph is essential for high-frequency tuning. Common Applications The NEC B58944 was a "workhorse" component found in:
Telecom Switching: Used in line cards and signal processing units.
Audio Preamplifiers: Thanks to its low-noise characteristics and PNP polarity. From forum posts and repair guides mentioning "NEC
Signal Inverters: Frequently paired with an NPN counterpart for push-pull configurations.
Legacy Computing: Found in power management sub-circuits for 1990s-era hardware. Finding a Replacement
Since many NEC discrete semiconductors are now "End of Life" (EOL), you might need a cross-reference if the original is unavailable. When looking for an equivalent, prioritize:
Pinout Compatibility: Ensure the Emitter-Base-Collector sequence matches your PCB. Gain ( hFEh sub cap F cap E end-sub ): Try to stay within 10% of the original NEC rating.
Frequency Response: Ensure the replacement can handle the same fTf sub cap T if used in a radio or data circuit. Conclusion
The NEC B58944 datasheet is more than just a list of numbers; it’s a blueprint for the stability of the device it powers. Whether you are performing a "board-level" repair or archiving data for legacy support, understanding the PNP characteristics of this transistor is key.
The NEC B58944 is a specialized integrated circuit (IC) primarily used in automotive Engine Control Units (ECUs), such as those manufactured by Bosch. It functions as a 256 Kbit Parallel SRAM (Static Random-Access Memory). Technical Specifications Equivalent Part Number: $\mu$PD43256BGU-70L. Memory Capacity: 256 Kib (typically organized as Package Type: SO-28 (Small Outline 28-pin).
Application: Used for repairing damaged automotive ECU circuit boards and engine drive systems. Usage Guide & Availability
Programming: The B58944 is often sold as an "empty" chip, meaning it does not contain pre-installed program data and must be integrated into the specific board's system architecture.
Procurement: These parts can be sourced through electronics component distributors like Jotrin Electronics or Elparts.
Identification: In automotive contexts, it may also be referred to by its Bosch-specific internal marking or as a "drive chip" for the ECU. B58944 NEC Integrated Circuits (ICs) - Jotrin Electronics
Possible explanations:
What to do next:
If you can share a photo of the component marking or tell me what device it came from (make/model of the equipment), I may be able to identify a cross-reference or actual datasheet.
The NEC B58944 is an automotive-grade integrated circuit primarily used in Bosch Electronic Control Units (ECUs) for engine management. In the automotive industry, it is widely recognized as a cross-reference or "mask" for the NEC D43256BGU-70Y, which is a high-speed CMOS static RAM chip. Core Function & Applications
The B58944 serves as a critical memory component within the ECU, handling real-time data storage and retrieval necessary for engine operations such as fuel injection, ignition timing, and air management.
Primary Use: Found in Bosch EDC15 and EDC16 diesel engine control boards, as well as various gasoline units.
Role: It acts as the "working memory" (SRAM) for the ECU’s microprocessor, storing temporary operational maps and sensor data during vehicle operation.
Common Repairs: This chip is frequently identified as a "vulnerable" or "easily damaged" part. Technicians often replace it to fix corrupted engine computer boards or "bricked" ECUs. Technical Specifications
Based on its identical counterpart, the D43256BGU-70Y, the B58944 features the following technical characteristics: Feature Specification Memory Type CMOS Static RAM (SRAM) Capacity 256K-bit (32,768 words x 8 bits) Access Time 70 ns (indicated by the "-70" suffix) Package Type 28-pin Plastic SOP (Small Outline Package) Voltage Range 2.7 V to 5.5 V (B version) Data Retention Low VCC data retention down to 2.0 V Key Features for Automotive Use
Battery Backup Support: Designed to retain data at very low voltages, allowing it to preserve critical adaptive data even when the vehicle's main power fluctuates.
Extended Temperature Operation: Built to withstand the harsh thermal environments typical of an engine bay.
High-Speed Processing: The 70 ns access time ensures the ECU can make micro-second adjustments to engine parameters based on sensor input. Микросхема NEC B58944 D43256BGU-70Y
Микросхема NEC B58944 D43256BGU-70Y памяти используется для замены в блоке управления Bosch. ecufix.ru NEC B58944 D43256BGU-70Y BOSCH Auto ECU computer IC
The NEC B58944 is a specialized integrated circuit (IC) primarily used as an SRAM memory chip or driver within automotive Engine Control Units (ECUs), particularly those manufactured by Bosch. It is widely recognized in automotive repair circles as a common point of failure in vehicle computers for brands like Honda, Mercedes-Benz, and Volvo. Key Specifications & Equivalents Part Number: B58944
Full Identity: Often marked or cross-referenced as μPD43256BGU-70L or D43256BGU-70Y. Type: 256 Kbit (32K x 8) Static RAM (SRAM). Package: SOP-28 (Small Outline Package with 28 pins).
Speed: Typically rated at 70ns (indicated by the "-70" suffix). Manufacturer: NEC Electronics (now Renesas). Automotive Applications
The B58944 is a "vulnerable" component, meaning it is frequently the culprit when an ECU fails. It is found in several Bosch ECU families:
ME7 Series: Including ME7.4.4, ME7.5, ME7.9.6, and ME7.9.20.
EDC Series: Common in EDC7 and EDC16 units for heavy vehicles like Iveco.
Vehicle Compatibility: Used in Bosch-equipped computers for Honda, Mercedes-Benz, Volvo (XC70/XC90), and Iveco. Repair & Sourcing Tips
💡 Warning: If you are buying this for an ECU repair, these chips are often sold "empty" (without pre-programmed data) if they are being used as generic RAM, but always verify if your specific ECU application requires a programmed version.
Availability: You can find replacements on AliExpress and eBay for relatively low costs.
Datasheet Access: While a standalone "B58944" datasheet is rare because it's an OEM part number, you should search for the μPD43256B datasheet from NEC/Renesas to get full electrical timing and pinout details.
Specialist Vendors: Sites like Jotrin Electronics and ECUFix specialize in these automotive-grade ICs. Микросхема NEC B58944 D43256BGU-70Y
Note: After an extensive search of publicly available technical databases (including NEC Electronics/Renesas archives, distributor datasheet repositories, and general web indexes), no official or third-party datasheet for a component labeled exactly “B58944” could be located. This report therefore provides:
| Your Goal | Action | | :--- | :--- | | Find the real part number | Look for a shorter code on the component (e.g., "C945", "A733"). Ignore "B58944" if it appears as a single line. | | Get the datasheet | Search that shorter code + "NEC" on Alldatasheet. | | Understand the datasheet | Focus on Absolute Max, Electrical Characteristics, and Pinout. | | Still no datasheet? | The part is likely a custom-marked OEM component. Find the device's service manual instead. |
Final note: Do not assume a generic substitute without the real datasheet. NEC parts often have unique switching speeds, gain bandwidths, or isolation voltages. If you need help, reply with a clear photo of the component and the device it came from (e.g., "Sony radio model XR-C5100"). Application Areas The NEC B58944 is a versatile
Given the difficulty finding it online, try these methods:
If the B58944 is defective and no datasheet exists, consider these strategies:
