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

Function of the card:
SDTRL Single Shot Variable
SDTRL ss variable vm
SDTRL - single shot variable - vm

Open Collector Programmable Falling Edge Triggered One Shot w/ Pulldown

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

Part number: 370291

PCB number: 493103

Used in: IBM 1414 I/O Synchronizer, IBM 1410, 7030

Symbol:SS

SS: Single Shot. Provides a monostable output which can be pulsed into its quasi-stable state for a predetermined duration. with each input triggering pulse or triggering voltage change. Once triggered, the output pulse duration becomes independent of input time duration or amplitude.

Pinout:

A I1R
B I1C
C
D TC-0
E TC-C
F TC-s
G TC-f
H TC-vs
J GND
K O1R
L O1
M -12V
N +12VM
P
Q
R TC-m
References: Coslet data
1410_SMS_VOL_1.pdf, p78

This page created by Ken Shirriff on Wed Sep 15 18:15:11 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.