Double-check the suffix on the part number, as variations may exist for different voltage tolerances or temperature grades.
Compatible with ME7.4.4 and ME7.5.10 systems.
While full public datasheets for automotive-grade proprietary chips like the B58944 are often restricted to authorized manufacturers, the following technical profile has been established through industry procurement data: nec b58944 datasheet 2021
Applicable in communications equipment, industrial controls, and personal electronics requiring robust driver ICs. 2021 Technical Context and Availability
NEC Corporation (now under the Renesas umbrella) and Bosch. Double-check the suffix on the part number, as
In many automotive repair scenarios, the B58944 is replaced alongside other memory or processor chips like the D43256BGU to restore full ECU functionality. Design and Integration Tips If you are integrating or replacing this part:
SOP-28 (Small Outline Package with 28 pins), a standard surface-mount format for high-density automotive circuits. 2021 Technical Context and Availability NEC Corporation (now
As of 2021 and moving into 2026, the B58944 remains a "legacy yet essential" part. Because these chips are often custom-made for Tier 1 automotive suppliers like Bosch, they are typically sourced through specialized distributors rather than general consumer electronics retailers.