Function of the card:
SDTDL 3 way n and log blk w/loads
Exists in SLT version.
Saturated Drift Transistor Diode Logic (SDTDL) is a form of Diode-transistor logic using faster drift-field transistors.
Part number: 372587
SLT modules: 2399110, 361431
Customer Eng reference number: 734366
Used in: IBM 2821 Control Unit
Cap code: None (details)
The information on these pages comes from a variety of sources, especially old IBM documents on bitsavers.org, as well as information from the IBM 1401 restoration team, especially Tim Coslet's SMS data and Jim Hunt's data. Much of this information was obtained through OCR, so don't expect complete accuracy. These pages are not associated with IBM in any way.