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

Function of the card:
Ctrl-sdtrl contact filter card
Ctrl - sdtrl contact filter card and level converter

Saturated Drift Transistor Resistor Logic (SDTRL) is a form of resistor-transistor logic using faster drift-field transistors.

Complemented Transistor Resistor Logic (CTRL) is IBM's term for a form of resistor-transistor logic.

Part number: 370563

PCB number: 484327

Used in: IBM 1410, IBM 1414 I/O Synchronizer

Cap code: None (details)

References: 1410_SMS_VOL_2.pdf, p21

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.