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

Function of the card:
CTRL Light Driver N Type

Hex Lamp Driver 15mA

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

Part number:371943

PCB number:493239

Used in:IBM 1620,IBM 1311 Disk

Symbol:LD, DI

DI: Driver, Indicator. Driver operating into an indicating device.

Transistor type:033

References:
IBM 1311 ILD, p92.
IBM 1620 Instructional System Diagrams, p471.

Pinout:

A I1
B O1
C I5
D
E I2
F O2
G I6
H O6
J GND
K O4
L O5
M
N +12VM
P I3
Q O3
R I4

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 23:40:32 2015.