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

Function of the card:
CTDL- 3-Way “And” NPN No Loads
Ctdl 3 way and npn no loads

Complemented Transistor Diode Logic (CTDL) is IBM's term for a form of diode-transistor logic.

Part number:371270

Field replacement part number:370978

Customer Eng reference number:729833

Used in:IBM 1401,IBM 1414 I/O Synchronizer

CKWF CKWF

References:
1_2 SMS Cards, p34,95.
1414 SMS Cards, p22,97.
This page created by Ken Shirriff, 2015.

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. Images courtesy of Randall Neff. Much of this information was obtained through OCR, so don't expect complete accuracy. These pages are not associated with IBM in any way.

Creation time: Tue Mar 03 23:40:33 2015.