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

Function of the card:
Ctrl-inverters n type
CTRL - Inverters "N" Type
Ctrl - inverters "n" type
CTRL Three-Way PNP Non-Translating Circuits
CTRL-Inverter "N" Type

Triple 3 Input NAND
Listed in 1401 SMS card usage

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

Part number: 371029

PCB number: 491149

Used in: IBM 1410, IBM 729V, IBM 1414 I/O Synchronizer, IBM 1620, 1626, 7030, 1622

Cap code: None (details)

Symbol: -O, E, A, O

-O: Negative OR. In-phase output is negative if one or more Input signals are negative. Outof-phase output is positive for the above condition.
IBM SMS card type CD 371029 IBM SMS card type CD 371029 IBM SMS card type CD 371029 IBM SMS card type CD 371029 IBM SMS card type CD 371029 IBM SMS card type CD 371029

Image courtesy of Henk Stegeman

Pinout:

A I1
B I1
C O2C
D O3
E O1
F I2
G I2
H I2
J GND
K I1
L O2R
M -12V
N +12VM
P I3
Q I3
R I3
References: IBM 1620 FE Catalog
National Museum of Computing.
1410_SMS_VOL_2.pdf, p55
IBM 1620 Instructional System Diagrams, p475
IBM Standard Modular System, Component Circuits, p211
1626 Plotter Parts
Coslet data

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.