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

Function of the card:
CTDL- 3 Way “And” NPN One Load
Three-Way +AND (1 load)
Ctdl 4 way and npn one load
Ctdl-3 way and npn one load
Ctdl-3 way "and" npn one load

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

Part number:371269

Field replacement part number:370918

Customer Eng reference number:729832

Used in:IBM 1401,IBM 1414 I/O Synchronizer,IBM 7070,IBM 1410

Symbol:+A

+A: Positive AND. in-phase output is positive only when all inputs are positive. Out-of-phase output is negative for the above condition.

Family: CTDL

CKVU CKVU

References:
IBM Standard Modular System, Component Circuits, p46.
1_2 SMS Cards, p34,94.
1410_SMS_VOL_1.pdf/1410_SMS_VOL_2.pdf, p2073.
1414 SMS Cards, p21,97.
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.