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

Function of the card:
Ctrl -resistor-load

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

Part number: 371617

Used in: IBM 1410, 7030

Cap code: None (details)

Symbol: R

R: Load. Provides proper terminating impedance or optimum coupling of one circuit to another at the correct operating voltage level.

References: 1410_SMS_VOL_2.pdf, p94

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.