Function of the card:
CTRL-Emitter Follower PNP
Quad Emitter Follower
Complemented Transistor Resistor Logic (CTRL) is IBM's term for a form of resistor-transistor logic.
Part number:371032
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.
Transistor type:025
IBM 1620 Instructional System Diagrams, p477.
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 |
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 23:40:33 2015.