Electrical characteristics table

You can find full technical parameters and PDF documentation for the μPD43256BGU series (the commercial equivalent) on major databases like AllDatasheet or Elparts .

Since this is an automotive-grade legacy part, official public datasheets from NEC (now Renesas) are rare. You can find technical details and purchase options through these specialized resources:

NEC discontinued many legacy components after the Renesas merger. Consequently, older part numbers like the B58944 are often: