Function of the card:
SDTRL Standard Cable Terminator Gated
SDTRL standard cable terminator gated
Simplex Interface Terminator Gated
Quad NAND Line Receiver
Saturated Drift Transistor Resistor Logic (SDTRL) is a form of resistor-transistor logic using faster drift-field transistors.
Part number: 371988
PCB number: 493261
Used in: 1622, IBM 1620
Cap code: None (details)
Symbol: DT
DT: Driver. Terminator. A single-transistor class-A grounded-base amplifier used to terminate a transmission line.
Pinout:
 |
A O2 B O1 C O3 D I2 E I3 F C3 G O4R H I4 J GND K C2 L O4C M -12V N +12VM P C1 Q I1 R C4 |
IBM 1620 Instructional System Diagrams, p481
National Museum of Computing.
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.