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

Function of the card:
Voltage Mode Single Shot 2
Ctrl-vm single shot #2

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

Part number: 371623

Used in: IBM 1410, 7030

Cap code: None (details)

Symbol: SS

SS: Single Shot. Provides a monostable output which can be pulsed into its quasi-stable state for a predetermined duration. with each input triggering pulse or triggering voltage change. Once triggered, the output pulse duration becomes independent of input time duration or amplitude.

References: 1410_SMS_VOL_2.pdf, p95
IBM Standard Modular System, Component Circuits, pp226,227

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.