Nec B58944 Datasheet !!link!! May 2026

NEC B58944 is an integrated circuit, specifically identified as a 256 K-bit Static Random Access Memory (SRAM) chip. It is often cross-referenced or equivalent to the $\mu$PD43256BGU-70L Technical Specifications

If you are in the business of automotive repair or specialized electronics, you have likely encountered the NEC B58944. Often referred to by its equivalent part number, μPD43256BGU-70L, this integrated circuit (IC) is a staple in high-performance Engine Control Units (ECUs), particularly those manufactured by Bosch. nec b58944 datasheet

| Pin | Function | Typical Use | |-----|-------------------|-------------------------------| | 1 | VIN (Input voltage)| Unregulated DC input (8-35V) | | 2 | GND | Ground reference | | 3 | VOUT (Output) | Regulated output (5V/12V) | | 4 | ADJ/Control | Voltage adjust or ON/OFF | | 5 | NC or Feedback | Not connected or sense input | NEC B58944 is an integrated circuit, specifically identified

Common Applications: Primarily found in Bosch ECUs for brands like Honda, Iveco, and various Volvo models (e.g., EDC16, ME7 series). Status: Lead-free and RoHS Compliant. Why It’s a "Must-Have" for ECU Repair | Pin | Function | Typical Use |

For procurement or replacement, these parts are often stocked by specialized electronic component distributors such as Jotrin Electronics Jotrin Electronics full PDF datasheet for the $\mu$PD43256B equivalent, or do you need a pinout diagram NEC B58944 ECU DRIVER SOP-28 - Inovauto.com

8. Datasheet Availability

Since NEC spun off its semiconductor division into Renesas Electronics, older NEC documents can be hard to locate.