Nec B58944 Datasheet 2021 _top_ -
The NEC B58944 is widely identified as a or, in some documented applications, a Darlington transistor array or switching transistor . Based on cross-referencing with vintage equipment service manuals (especially CRT monitors, power supplies, and audio amplification stages from the 1990s and early 2000s), the B58944 typically functions as a medium-power NPN transistor.
In practice, the B58944 is often paired with a specific bootloader and firmware that expects the 70‑ns access time and the specific power‑up sequence of the μPD43256 family. Using a general‑purpose SRAM (e.g., an AS6C62256) is risky and may lead to sporadic faults. The safest course is to obtain a genuine NEC B58944 or a pre‑programmed pull from a known‑good ECU.
| Characteristic | Test Condition | Min | Typ | Max | Unit | |----------------|----------------|-----|-----|-----|------| | DC Current Gain (hFE) | VCE = 5V, IC = 500mA | 40 | 100 | 200 | - | | Collector-Emitter Saturation Voltage | IC = 2A, IB = 0.2A | - | 0.5 | 1.2 | V | | Base-Emitter On Voltage | VCE = 5V, IC = 1A | - | 0.9 | 1.2 | V | | Transition Frequency (fT) | VCE = 10V, IC = 100mA | 50 | 80 | - | MHz | | Collector Cutoff Current | VCB = 60V, IE = 0 | - | - | 10 | µA |
The high pulsed current capability makes the B58944 exceptionally suitable for inductive load switching and motor drive applications where surge currents are common during start-up or stall conditions. nec b58944 datasheet 2021
If you're unable to locate the 2021 version of the datasheet, the specifications are likely to remain similar, given that the component hasn't been updated or discontinued. However, always verify the information with a reliable source to ensure accuracy and compliance with your application's requirements.
): Controls device activation; reduces power consumption to standby levels when pulled high. Output Enable ( OE¯modified OE with bar above
Engine bay electronics are prone to severe electrical anomalies. According to the component parameters indexed on UTSOURCE , the architectural layout embeds: to stop thermal runaway. Short-Circuit Protection to safeguard internal logic cells. The NEC B58944 is widely identified as a
The NEC B58944 proved that in the fast-paced world of tech, sometimes the most important innovation isn't the newest chip, but the documentation that keeps the old ones running.
When an ECU suffers from "Dead Module" symptoms or fails to establish a diagnostic session (No K-Line/CAN communication), the B58944/D43256 memory sub-allocator is often a prime point of failure. : Validate that exactly reaches the VCCcap V sub cap C cap C end-sub pin of the SOP-28 package. If the voltage tracks below , look for an upstream capacitor short.
The is a specialized integrated circuit primarily utilized as an ECU driver within automotive engine control units. Often cross-referenced as the Bosch B58944 , this component is a critical "intelligent" power switch used to manage various actuators in modern vehicle electronics. Key Specifications and Overview Using a general‑purpose SRAM (e
According to technical databases like Elparts and Jotrin Electronics , the B58944 has the following features: : Static Random Access Memory (SRAM). Memory Density : 256 Kibit (Kilobits). Interface : Parallel. Package Type : SO-28 (Small Outline 28-pin).
Specialized workshops like ECUfix provide replacement chips and firmware files specifically for ECU restoration.
, and various European models using systems like Bosch ME7.4.4, ME7.5, and EDC16. Common Failure Point