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

Function of the card:
SDTRL-std cbl termntr gtd without ld
Driver Terminator
SDTRL - simplex interface terminator gated without loads
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 , hole pattern: 493457

Used in: IBM 1410, IBM 1311 Disk, IBM 1620, IBM 1414 I/O Synchronizer, 7040

Cap code: None (details)

Symbol: DT

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

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
References: IBM 1311 ILD, p117
1410_SMS_VOL_1.pdf, p57
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.