Keithley KPCI-PIO32IOA User Manual page 67

C-4 Glossary KPCI-PIO32IOA and KPCI-PDISO8A User's Manual
TTL
Abbreviation for transistor-transistor-logic. A popular logic circuit family that uses multiple-
emitter transistors. A low signal state is defined as a signal 0.8V and below. A high signal state is
defined as a signal +2.0V and above.
1
Microsoft Press Computer Dictionary, Third Edition. Refer to "Sources" below.
Sources:
Keithley Instruments, Inc., Catalog and Reference Guide (full line catalog), glossary, 1998
Microsoft Press Computer Dictionary, Third Edition (ISBN: 1-57231-446-X) by Microsoft
Press. Reproduced by permission of Microsoft Press. All rights reserved.