This page describes the IBM SMS card "DJL", and is part of the SMS card database.

Function of the card:
SDTDL single shot hammer dr.
DJL Card

Exists in SLT version.

Saturated Drift Transistor Diode Logic (SDTDL) is a form of Diode-transistor logic using faster drift-field transistors.

Part number: 373354

SLT modules: 2399113, HD

Customer Eng reference number: 734404

PCB number: 375679 , hole pattern: 490322

Used in: IBM 2821 Control Unit

Cap code: None (details)

IBM SMS card type DJL 373354 IBM SMS card type DJL 373354 IBM SMS card type DJL 373354 IBM SMS card type DJL 373354 IBM SMS card type DJL 373354 IBM SMS card type DJL 373354 IBM SMS card type DJL 373354

Image courtesy of Henk Stegeman
Image courtesy of Richard Stuve

References: IBM 2821 CCD, pp68,69,70
National Museum of Computing.

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.