Nec B58944 Datasheet Free _verified_

. While often labeled with this Bosch-specific part number, it is functionally equivalent to the NEC μPD43256BGU-70L Technical Overview The chip is a high-speed, low-power CMOS Static RAM (SRAM)

Activating relays for fuel pumps, cooling fans, and lighting systems.

| Source | Details | Direct Access Method | | :--- | :--- | :--- | | | Part # UPD43256BGU-70L . 174Kb/24P PDF from NEC. | Search this part number on the site. | | Alldatasheet.com | Part # D43256BGU70Y . 174Kb/24P PDF from NEC. | Search this part number on the site. | | DigiKey | Part # UPD43256BGU-70Y . Links directly to the manufacturer's datasheet. | Visit the DigiKey product page and click the "Datasheet" link. | | Renesas Electronics | Original manufacturer's site. Most authoritative source. | Search for µPD43256B on the Renesas website. | | Yumpu.com | Hosts a scanned copy of an NEC uPD43256B datasheet PDF. | Search for "NEC uPD43256B 32k x 8bit SRAM Datasheet.pdf". |

: You can find listings for this specific chip at automotive electronics suppliers like Ecufixtool or general electronic component distributors such as Jotrin Electronics PDF Search : General datasheet repositories like ALLDATASHEET nec b58944 datasheet Free

The is an automotive integrated circuit (IC) widely used in Bosch Engine Control Units (ECUs). While often referred to by its house part number (B58944), it is technically equivalent to the $\mu$PD43256BGU-70L , a 256K parallel CMOS static RAM (SRAM). Technical Specifications Component Type: Parallel SRAM Package: SOP-28 (Small Outline Package) Capacity: 256 Kib (32K x 8 bits)

You can view technical specifications for the base architecture at μPD43256B Datasheet (PDF) Suppliers:

with a low airflow setting to prevent blowing off surrounding surface-mount resistors. 174Kb/24P PDF from NEC

: Electronic databases like Jotrin Electronics or Worldway Electronics regularly update their inventories and upload free downloadable PDFs of open-market IC listings.

When replacing a faulty chip on a salvaged or broken board, note that replacement parts ordered online arrive as unprogrammed blank chips. The ECU's master microcontroller handles formatting and dynamic read/write processes automatically upon boot, meaning manual file flashing to this specific SRAM chip is not required.

| Parameter | Typical Range (depending on component type) | | --- | --- | | Polarity | NPN / PNP / N-Channel | | V(BR)CEO | 50V – 200V | | I(C) | 1A – 10A | | P(D) | 1W – 50W | | Package | TO-220, TO-247, or SOT-23 | Title and short description

: Primarily used as an engine drive chip in automotive ECU circuit boards to handle temporary data storage. Accessing the Datasheet

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Controls high-side power, allowing switching of loads connected to ground.

Title and short description