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

Function of the card:
CTRL-Emitter Follower PNP
Ctrl - emitter follower pnp
Ctrl-emitter follower pnp
CTRL Emitter Follower PNP

Listed in 1401 SMS card usage
Quad Emitter Follower

Complemented Transistor Resistor Logic (CTRL) is IBM's term for a form of resistor-transistor logic.

Part number: 371032

PCB number: 491155

Used in: IBM 729II/V, IBM 1620, 7030, IBM 1410, IBM 1414 I/O Synchronizer, IBM 1311 Disk, IBM 7090

Symbol:DE

DE: Driver Emitter Follower. A driver, operating on the emitter follower principle, used for power amplification, impedance matching, and isolation without inversion. Often used as a logical element.
IBM SMS card type CEYB 371032 IBM SMS card type CEYB 371032 IBM SMS card type CEYB 371032 IBM SMS card type CEYB 371032 IBM SMS card type CEYB 371032 IBM SMS card type CEYB 371032 IBM SMS card type CEYB 371032 IBM SMS card type CEYB 371032

Image courtesy of Roberto Gonzalez Rocha

Pinout:

A PU1
B I1
C I2
D PDR
E O4
F I3
G O1E
H O3E
J GND
K PU2
L I4
M -12V
N
P O2E
Q +12V
R PU3
References: IBM 1311 ILD, p110
Coslet data
IBM Standard Modular System, Component Circuits, pp212,213
1410_SMS_VOL_2.pdf, p56

This page created by Ken Shirriff on Wed Sep 15 18:15:09 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.