: Active-low input. Signals the chip to record incoming data from the I/O pins into memory.
Because the underlying core is a 32K x 8 SRAM, the SOP28 pinout layout maps consistently to standard JEDEC configurations for 256K SRAMs. Below is the technical pin breakdown required for circuit probing or board-level replacement: Pin Number Signal Name Description A0 – A14 Address Lines (15 lines required to address 32K locations) 11-13, 15-19 I/O1 – I/O8 Input/Output Data Lines (8-bit bi-directional data bus) 14 Ground Reference 20 /CE or /CS Chip Enable / Chip Select (Active Low) 22 Output Enable (Active Low) 27 Write Enable (Active Low) 28 Main Power Supply (+5V Typical for legacy automotive) Critical Applications in Automotive Diagnostics
While exact absolute maximum ratings depend on the targeted Bosch system hardware layout, the standard operational metrics of this driver IC family include: Metric Parameter Standard Operational Value SOP-28 Surface Mount Logic Supply Voltage ( VCCcap V sub cap C cap C end-sub ) 4.5V to 5.5V DC High-Side Load Voltage ( VBatcap V sub cap B a t end-sub ) Up to 14V nominal (Automotive rail) Working Temperature Range -40°C to +125°C (Extended industrial/automotive) Typical Target Platforms Bosch Motronic ME7.x series 🚘 Vehicle Applications and Supported Platforms nec b58944 datasheet Free
Websites like Alldatasheet or Datasheetspdf often cache these files.
Given that the component is often sold under the Infineon brand, searching through Infineon's portfolio of high-side drivers and automotive relay drivers may help you identify a standard component that matches the B58944's characteristics. : Active-low input
(Modern, faster, low-power substitute) Cypress/Infineon CY62256LL-70SNXI Renesas M5M5256DFP-70LL How to Find the NEC B58944 Datasheet Free
: Integrated into EDC7 and EDC16 engine control units. It is heavily used in industrial and commercial vehicles like Iveco diesel fleets. Below is the technical pin breakdown required for
The search for the is a journey through the golden age of Japanese semiconductors. While this specific part is obscure and likely a custom OEM component, the document does exist somewhere—likely in a dusty service manual or on a retired engineer’s hard drive.
Place the fresh NEC B58944 component onto the pads. Ensure Pin 1 aligns perfectly with the orientation dot or notch marked on the PCB silkscreen.