Nec B58944 Datasheet 2021 【2024】

Because the B58944 is a high‑value automotive security chip, counterfeit or remarked components exist . Avoid listings that do not show clear pictures of the top marking or that sell the chip at unrealistically low prices (e.g., below $0.50 in single quantity). Always purchase from a broker that provides a datasheet or a PDF of the device’s specification with the sale.

: U-series (Network/Communication) codes or internal ECU memory checksum errors (e.g., P0606). Hardware Diagnosis:

: A repository for PDF versions of technical manuals for older semiconductor parts. B58944 - datasheet, pdf, info, parameters, stock - Elparts

-70Y (Indicating a 70-nanosecond random access time). nec b58944 datasheet 2021

Temporarily stores raw signals from Mass Air Flow (MAF), Oxygen, and Crankshaft position sensors.

Available via Worldway Electronics or Jotrin Electronics, which provide factory excess stock for repair workshops.

70 ns (indicated by the "-70Y" or "-70L" suffix). Because the B58944 is a high‑value automotive security

Because automotive boards utilize heavy ground planes to dissipate heat, desoldering requires professional rework tools:

In the automotive repair industry, the NEC B58944 is known as a "vulnerable driver IC". It is a common point of failure on . Repair technicians often seek this specific chip to:

When this memory chip degrades or fails, the vehicle's engine computer cannot properly parse transient data. Common symptoms include: Temporarily stores raw signals from Mass Air Flow

Intermittent loss of communication with onboard OBD-II diagnostic scanners.

If you are currently troubleshooting a specific vehicle control module or looking to procure this IC, please let me know: