Function of the card:
SDTDL logic inv. hs load
H.S. logic inverter
Saturated Drift Transistor Diode Logic (SDTDL) is a form of Diode-transistor logic using faster drift-field transistors.
Part number: 372592
Customer Eng reference number: 734369
Used in: IBM 1311 Disk, IBM 2821 Control Unit
Cap code: None (details)
IBM 2821 CCD, p118
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.