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

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

Triple 3 Input NAND

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 1620,IBM 1414 I/O Synchronizer,IBM 729V,IBM 1410

Symbol:-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.

Transistor type:033

References:
IBM Standard Modular System, Component Circuits, p211.
1410_SMS_VOL_1.pdf/1410_SMS_VOL_2.pdf, p2055.
1414 SMS Cards, p19.
IBM 1620 Instructional System Diagrams, p475.

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

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.