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

Function of the card:
SDTRL-end of line terminators
SDTRL-End of Line Terminators
SDTRL - end of line terminators

Listed in 1401 SMS card usage
100ohm terminators: Quad to 0V w/9 to 1.5V

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

Part number: 370334

PCB number: 493281

Used in: IBM 1620, IBM 1311 Disk, IBM 1410, IBM 1401

Pinout:

A T1B
B T2B
C T3B
D T4B
E T5B
F T6B
G T1A
H T7B
J GND
K T8B
L T9B
M
N +12VM
P T2A
Q T3A
R T4A
References: Coslet data
2_2 SMS Cards, p121
1410_SMS_VOL_1.pdf, p85
IBM 1620 Instructional System Diagrams, p491
IBM 1311 ILD, p136

This page created by Ken Shirriff on Wed Sep 15 18:15:10 2021.

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.