Function of the card:
CTDL-Two Way “And” PNP Two Loads
Two-Way-AND (2 loads)
Ctdl two way and pnp two loads
Complemented Transistor Diode Logic (CTDL) is IBM's term for a form of diode-transistor logic.
Part number:371261
Field replacement part number:370975
Customer Eng reference number:729822
Symbol:-A
-A: Negative AND. In-phase output is negative only when all inputs are negative. Out-of-phase output is positive for the above condition.
Family: CTDL
IBM Standard Modular System, Component Circuits, p42.
1_2 SMS Cards, p29,84.
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.