No matching results appear in:

Vout=Vcc×(RntcRfixed+Rntc)V sub o u t end-sub equals V sub c c end-sub cross open paren the fraction with numerator cap R sub n t c end-sub and denominator cap R sub f i x e d end-sub plus cap R sub n t c end-sub end-fraction close paren 5. Equivalent and Alternatives

: SOP-28 (Small Outline Package, 28 pins) or SO-28.

: It filters out transient spikes and electrical noise from the engine bay before they reach the main CPU.

): Optimized for small-signal processing rather than power regulation. Transition Frequency ( fTf sub cap T

Delivers a stable +5V regulated power rail from the ECU's main power management IC.

Including ME7.4.4, ME7.5, ME7.9.6, and ME7.9.20.

256 Kibibits organized uniformly into a 32K x 8-bit architecture .

While mostly known for its presence in Bosch ECUs, the component may also be found in other complex automotive control units and industrial automation systems. Its classification as "Standard" quality grade by NEC means it is suitable for general-purpose applications where high reliability is expected but not specifically guaranteed for critical fail-safe systems.

Given the difficulty finding it online, try these methods:

: Controls peripheral actuators, relays, and solenoids with built-in clamping diodes to suppress inductive voltage spikes.

Because it acts as a power driver, the B58944 handles significant current load and is one of the most frequently damaged parts on an automotive controller board. Common Symptoms of Failure

The story of the NEC B58944 is a classic case of a "ghost" component—a part that is vital to keeping millions of vehicles on the road but officially exists only in the shadow of proprietary documentation. The Role: The Unsung Hero of the EDC16 The NEC B58944 (often labeled with D43256BGU-70Y

Isopropyl alcohol (99% concentration) and an ESD-safe brush. Step-by-Step Rework Procedure

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

Move your hot air nozzle in a continuous circle over the chip package. Use tweezers to gently lift the chip once the solder fully liquefies. Do not force the lift, or you may tear the PCB pads.

When replacing this IC, it is critical to note that the is typically an "empty" chip; it does not come pre-programmed with vehicle-specific data. Its role is to provide the workspace (SRAM) for the processor to execute tasks. If you are sourcing this for a repair, ensuring the speed grade (indicated by the "-70" suffix, meaning 70ns access time) matches the original is vital for timing stability. Where to Buy

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Nec B58944 Datasheet Jun 2026

No matching results appear in:

Vout=Vcc×(RntcRfixed+Rntc)V sub o u t end-sub equals V sub c c end-sub cross open paren the fraction with numerator cap R sub n t c end-sub and denominator cap R sub f i x e d end-sub plus cap R sub n t c end-sub end-fraction close paren 5. Equivalent and Alternatives

: SOP-28 (Small Outline Package, 28 pins) or SO-28.

: It filters out transient spikes and electrical noise from the engine bay before they reach the main CPU.

): Optimized for small-signal processing rather than power regulation. Transition Frequency ( fTf sub cap T nec b58944 datasheet

Delivers a stable +5V regulated power rail from the ECU's main power management IC.

Including ME7.4.4, ME7.5, ME7.9.6, and ME7.9.20.

256 Kibibits organized uniformly into a 32K x 8-bit architecture .

While mostly known for its presence in Bosch ECUs, the component may also be found in other complex automotive control units and industrial automation systems. Its classification as "Standard" quality grade by NEC means it is suitable for general-purpose applications where high reliability is expected but not specifically guaranteed for critical fail-safe systems. ): Optimized for small-signal processing rather than power

Given the difficulty finding it online, try these methods:

: Controls peripheral actuators, relays, and solenoids with built-in clamping diodes to suppress inductive voltage spikes.

Because it acts as a power driver, the B58944 handles significant current load and is one of the most frequently damaged parts on an automotive controller board. Common Symptoms of Failure

The story of the NEC B58944 is a classic case of a "ghost" component—a part that is vital to keeping millions of vehicles on the road but officially exists only in the shadow of proprietary documentation. The Role: The Unsung Hero of the EDC16 The NEC B58944 (often labeled with D43256BGU-70Y 256 Kibibits organized uniformly into a 32K x

Isopropyl alcohol (99% concentration) and an ESD-safe brush. Step-by-Step Rework Procedure

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

Move your hot air nozzle in a continuous circle over the chip package. Use tweezers to gently lift the chip once the solder fully liquefies. Do not force the lift, or you may tear the PCB pads.

When replacing this IC, it is critical to note that the is typically an "empty" chip; it does not come pre-programmed with vehicle-specific data. Its role is to provide the workspace (SRAM) for the processor to execute tasks. If you are sourcing this for a repair, ensuring the speed grade (indicated by the "-70" suffix, meaning 70ns access time) matches the original is vital for timing stability. Where to Buy

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