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

Function of the card:
SDTRL-Standard Cable Driver
Simplex interface driver

Quad Line Driver

Saturated Drift Transistor Resistor Logic (SDTRL) is a form of resistor-transistor logic using faster drift-field transistors.

Part number:371987

PCB number:493259

Used in:IBM 1620,IBM 1414 I/O Synchronizer,IBM 1311 Disk,IBM 1410

Symbol:DL, D

DL: Driver, Line. Used to couple information between two widely separated points by means of coaxial line.

D: Driver. Isolates a signal from its generating source and uses it to drive one or more other circuits without affecting or overloading the generating circuits. Can be used to supply the required power directly or only to activate the circuit through which power is actually supplied.

Transistor type:045/101

References:
1410_SMS_VOL_1.pdf/1410_SMS_VOL_2.pdf, p2122.
1414 SMS Cards, p32.
IBM 1311 ILD, p111.
IBM 1620 Instructional System Diagrams, p481.

Pinout:

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

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.