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

Function of the card:
Ctdl-sense amplifier buffer
CTDL-Sense Amplifier,Buffer
Ctdl - sense amplifier, buffer

100mV Gated Sense Amplifier

Complemented Transistor Diode Logic (CTDL) is IBM's term for a form of diode-transistor logic.

Part number: 371678

PCB number: 492893

Used in: IBM 1410, IBM 1620, IBM 1414 I/O Synchronizer, 7030, 1622

Cap code: None (details)

Symbol: AM/R

Pinout:

A O1E
B P2
C P1
D I1
E
F PDR
G
H
J GND
K
L +12V
M -12V
N
P
Q
R
References: IBM 1620 FE Catalog
IBM 1620 Instructional System Diagrams, p486
1410_SMS_VOL_2.pdf, p108
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.