Nec B58944 Datasheet

: Internal gates can lock into a permanent "High" or "Low" state, keeping critical components like fuel pumps or injection systems permanently engaged or entirely unresponsive. Component Replacement Sourcing

The most common component referred to by the marking is a 32K-word by 8-bit (256K-bit) CMOS static RAM (SRAM) . The full manufacturer's part number for this specific device is µPD43256BGU-70L , produced by NEC Electronics. The "B58944" designation is a secondary marking, often applied for internal tracking by Bosch. This chip is housed in a 28-pin Small Outline Package (SOP) , designed for surface-mount assembly.

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The B58944 is primarily found in automotive controllers used by various manufacturers, including Honda , Iveco , and others using the ME7 and EDC16 series computer boards.

). It is commonly found in DC-DC converters, motor controllers, and power management systems where efficiency is critical. Advanced Trench Process nec b58944 datasheet

NEC parts are often discontinued. Go to Renesas Electronics (they bought NEC) and search their legacy products section.

Before moving on, it's crucial to clarify a common point of confusion. The identical string "B58944" is also used to classify an manufactured by Borosil Scientific, designed for lab analysis of fine crystalline precipitates. While this is an interesting coincidence, it is completely unrelated to the IC we are discussing. : Internal gates can lock into a permanent

Based on its identical counterpart, the , 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

: If a fuel injector or engine solenoid shorts out down the line, it forces excessive current backward into the B58944 driver pins, frying the internal output stages. Diagnostic Indicators The "B58944" designation is a secondary marking, often