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

Function of the card:
Terminator Gated Without Loads
SDTRL-std cbl termntr gtd without ld
SDTRL - simplex interface terminator gated without loads

Quad Open Collector NAND Line Receiver

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

Part number:370242

PCB number:484069

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

Symbol:DT

DT: Driver. Terminator. A single-transistor class-A grounded-base amplifier used to terminate a transmission line.

Transistor type:101

References:
1410_SMS_VOL_1.pdf/1410_SMS_VOL_2.pdf, p1057.
1414 SMS Cards, p55.
IBM 1311 ILD, p117.

Pinout:

A O2
B O1
C O3
D I2T
E I3T
F I3
G GND
H I4T
J GND
K I2
L O4
M
N +12VM
P I1
Q I1T
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 23:40:33 2015.