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

Function of the card:
SDTRL-3 Way Inverter

Triple 3 Input NAND

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

Part number:370367

PCB number:492909

Used in:IBM 1620,IBM 1311 Disk

Symbol:E, A, O

E: Extender. Provides additional inputs to logical blocks and triggers. Adds to drivers the ability to drive more loads.

Transistor type:039/101

References:
IBM 1311 ILD, p136.
IBM 1620 Instructional System Diagrams, p494.

Pinout:

A I1
B I1
C O2C
D O3
E O1
F I2
G I2
H I2
J GND
K I1
L O2R
M -12V
N +12VM
P I3
Q I3
R I3

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 23:40:34 2015.