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

Function of the card:
SDTRL-Inverter, 3 Way, Unloaded Collectors
SDTRL w. inverter. 3 way, unloaded collectors
SDTRL-inverter, 3 way, unloaded collectors
SDTRL-inv 3 way unloaded collectors

Triple 3 Input Open Collector NAND

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

Part number: 370083

PCB number: 492909

Used in: IBM 1410, IBM 1414 I/O Synchronizer, 1622, IBM 1620

Cap code: None (details)

Symbol: E, A, O

Pinout:

A I1
B I1
C O2
D O3
E O1
F I2
G I2
H I2
J GND
K I1
L PDR
M -12V
N +12VM
P I3
Q I3
R I3
References: IBM 1620 FE Catalog
1410_SMS_VOL_1.pdf, p5
IBM 1620 Instructional System Diagrams, p479
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.