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

Function of the card:
Negative Binary Trigger Card 2

Trigger is IBM's term for a flip flop or latch.

Part number: 371412

Used in: 7030, IBM 7090

Cap code: None (details)

Symbol: -TB

-TB: Trigger (Binary). A trigger whose steady state outputs change upon the negative transition of the input.
IBM SMS card type FJ 371412 IBM SMS card type FJ 371412

Image courtesy of Computer History Museum

References: IBM Standard Modular System, Component Circuits, pp104,105

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.