Features
• Buffered Inputs
• Typical Propagation Delay
- 10ns at VCC = 5V, TA = 25oC, CL = 50pF
• Exceeds 2kV ESD Protection per MIL-STD-883,
Method 3015
• SCR-Latchup-Resistant CMOS Process and Circuit
Design
• Speed of Bipolar FAST™/AS/S with Significantly
Reduced Power Consumption
• Balanced Propagation Delays
• AC Types Feature 1.5V to 5.5V Operation and
Balanced Noise Immunity at 30% of the Supply
• ±24mA Output Drive Current
- Fanout to 15 FAST™ ICs
- Drives 50W Transmission Lines

Description
The ’AC280 and ’ACT280 are 9-bit odd/even parity generator/
checkers that utilize Advanced CMOS Logic technology.
Both even and odd parity outputs are available for checking
or generating parity for words up to nine bits long. Even parity
is indicated (åE output is HIGH) when an even number of
data inputs is HIGH. Odd parity is indicated (åO output is
HIGH) when an odd number of data inputs is HIGH. Parity
checking for words larger than nine bits can be accomplished
by tying the åE output to any input of an additional
’AC280, ’ACT280 parity checker.