Nec B58944 Datasheet ^new^ < ESSENTIAL × 2024 >
: The "-70" suffix typically denotes an access time of 70 nanoseconds , meeting the high-speed requirements of automotive real-time processing.
Persistent, unresolvable checksum error codes stored in the main microprocessor. Cross-References and Sourcing Replacements
Q: What are the typical applications of the NEC B58944? A: The NEC B58944 is commonly used in power supplies, motor control, and lighting systems.
Typically rated at 70ns (indicated by the "-70" suffix). Manufacturer: NEC Electronics (now Renesas). Automotive Applications nec b58944 datasheet
The 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
Search for on a SMD code website (e.g., smd.yooneed.one or markingcodes.com ). But since that specific 5-digit number is unusual, try this instead:
Power supply overtemperature protection. 4. Electrical Characteristics and Design Considerations 4.1. Self-Heating Effect : The "-70" suffix typically denotes an access
Sites like Jotrin Electronics and ECUFix specialize in these automotive-grade ICs. Микросхема NEC B58944 D43256BGU-70Y
. While most consumer chips have public datasheets, the B58944 is a "vulnerable" part—meaning it is one of the first things to fail when a car's computer board encounters a power surge or thermal stress. The Legend: The Missing Datasheet
: Active LOW. Controls the output buffers during a Read operation. 27 A: The NEC B58944 is commonly used in
The B58944 features a standard asynchronous SRAM footprint. It separates the address bus, data bus, and control lines to ensure straightforward interfacing with 8-bit, 16-bit, or 32-bit automotive microcontrollers. Pinout Description (Standard 28-Pin SOP) Pin Number Function Type Description A0 – A14 Address Inputs : Selects one of the 32,768 memory locations. 11 - 13, 15 - 19 I/O1 – I/O8 Input/Output
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.
