CD54/74AC280,
CD54/74ACT280
Data sheet acquired from Harris Semiconductor
SCHS250A
August 1998 - Revised May 2000
9-Bit Odd/Even Parity Generator/Checker
data inputs is HIGH. Odd parity is indicated (∑O output is
HIGH) when an odd number of data inputs is HIGH. Parity
checking for words larger than nine bits can be accom-
plished by tying the ∑E output to any input of an additional
’AC280, ’ACT280 parity checker.
Features
• Buffered Inputs
• Typical Propagation Delay
o
- 10ns at V
= 5V, T = 25 C, C = 50pF
A L
CC
• Exceeds 2kV ESD Protection per MIL-STD-883,
Method 3015
Ordering Information
PART
NUMBER
TEMP.
RANGE ( C)
• SCR-Latchup-Resistant CMOS Process and Circuit
Design
o
PACKAGE
14 Ld CERDIP
14 Ld PDIP
CD54AC280F3A
CD74AC280E
-55 to 125
• Speed of Bipolar FAST™/AS/S with Significantly
Reduced Power Consumption
o
0 to 70 C, -40 to 85,
-55 to 125
• Balanced Propagation Delays
o
CD74AC280M
0 to 70 C, -40 to 85,
14 Ld SOIC
• AC Types Feature 1.5V to 5.5V Operation and
Balanced Noise Immunity at 30% of the Supply
-55 to 125
CD54ACT280F3A
CD74ACT280E
-55 to 125
14 Ld CERDIP
14 Ld PDIP
o
• ±24mA Output Drive Current
- Fanout to 15 FAST™ ICs
0 to 70 C, -40 to 85,
-55 to 125
o
- Drives 50Ω Transmission Lines
CD74ACT280M
NOTES:
0 to 70 C, -40 to 85,
14 Ld SOIC
-55 to 125
Description
1. When ordering, use the entire part number. Add the suffix 96 to
obtain the variant in the tape and reel.
The ’AC280 and ’ACT280 are 9-bit odd/even parity genera-
tor/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 par-
ity is indicated (∑E output is HIGH) when an even number of
2. Wafer and die for this part number is available which meets all elec-
trical specifications. Please contact your local TI sales office or cus-
tomer service for ordering information.
Pinout
Functional Diagram
CD54AC280, CD54ACT280
(CERDIP)
CD74AC280, CD74ACT280
(PDIP, SOIC)
8
I0
TOP VIEW
9
I1
10
I2
I3
5
6
I6
I7
1
2
3
4
5
6
7
14 V
CC
∑ EVEN
∑ ODD
11
12
13
1
13 I5
12 I4
11 I3
10 I2
NC
I8
I4
I5
I6
∑E
∑O
GND
9
8
I1
I0
2
4
I7
I8
GND = 7
= 14
V
CC
NC = 3
CAUTION: These devices are sensitive to electrostatic discharge. Users should follow proper IC Handling Procedures.
FAST™ is a Trademark of Fairchild Semiconductor.
1
Copyright © 2000, Texas Instruments Incorporated