Nec B58944 Datasheet Instant

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

NEC Corporation (now part of Renesas Electronics). Package Type: SOP-28 (Small Outline Package with 28 pins). Compliance: Lead-free and RoHS compliant.

Alternator surges or faulty jump-start attempts break down the chip's internal semiconductor gates.

Because this component is a legacy automotive ASIC, direct replacements are rarely found through standard commercial catalog channels. Hardware developers and repair specialists typically source authentic new-old-stock (NOS) inventory or salvage components through vetted global platforms like Jotrin Electronics or Worldway Electronics to guarantee circuit compatibility and reliable thermal tolerances.

The device integrated into the B58944 is a high-performance with technical specifications that highlight its role in real-time data processing. nec b58944 datasheet

: Tuning emission parameters dynamically.

: Provides the regulated stable 5V (or 3.3V depending on the specific ECU rail architecture) required for logical operations.

The 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

Q: What is the package type of the NEC B58944? A: The NEC B58944 is packaged in a TO-220AB package. Based on its identical counterpart, the , the

The device supports , maintaining memory contents with a minimal power supply of just 2.0V. This ensures vital configuration data survives engine shutdowns.

: Offers stringent quality control and worldwide shipping.

The B58944 is commonly found in Bosch ECUs used by various automotive brands, including . Specific ECU models that may utilize this or similar driver ICs include: Bosch ME7.4.4, ME7.5, ME7.9.6

A critical warning for tuners: Always read and save the injector codes from the ECU before making any changes. After flashing or modifying data, these injector codes may need to be reprogrammed for the vehicle to run correctly. Alternator surges or faulty jump-start attempts break down

: When sourcing this component, it is often found under the combined identifier NEC B58944 D43256BGU-70Y . The "D43256" reference relates to standard 256K-bit High-Speed CMOS Static RAM layouts, indicating that this chip architecture incorporates dedicated volatile memory registers to buffer engine diagnostic codes, temporary operational data, and real-time sensor parameters before sending them to the central processor. Key Technical Specifications & Package Parameters

: Random loss of vehicle map configurations or immoblizer data syncing. Bench Testing Protocol

OBD-II scan tools display "ECU Internal Memory Error" or loss of communication codes (U-codes).