Function of the card:
CTDL Power Inverter "P" Type
CTDL Power Inverter NPN
CTDL-Power Inverter āPā Type
Listed in 1401 SMS card usage
Complemented Transistor Diode Logic (CTDL) is IBM's term for a form of diode-transistor logic.
Part number: 371676
Symbol:IP
IP: Inverter, Power. Performs function of an inverter white also driving a line.
Image courtesy of Randall Neff
IBM Standard Modular System, Component Circuits, p233
2_2 SMS Cards, p50
Coslet data
This page created by Ken Shirriff on Wed Sep 15 18:15:10 2021.
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.