The real "story" for engineers and mechanics is the hunt for the datasheet. Because this chip was custom-manufactured by NEC for Bosch, a standard public datasheet doesn't technically exist in the way it does for a generic transistor. www.bosch-semiconductors.com The Repair Community: For years, ECU repair specialists on forums and sites like
Including EDC7 and EDC16 (heavy-duty and diesel systems, such as those in Iveco or Volvo trucks). Equivalent and Cross-Reference Parts nec b58944 datasheet