CAUTION: These devices are sensitive to electrostatic discharge. Users should follow proper I.C. Handling Procedures.
Copyright
Harris Corporation 1994
1
S E M I C O N D U C T O R
CD54AC280/3A
CD54ACT280/3A
9-Bit Odd/Even Parity Generator/Checker
Functional Diagram
8
9
10
11
13
2
1
12
5
6
ODD
EVEN
I0
I1
I2
I3
I5
I6
I7
I4
4
I8
GND = 7
V
CC
= 14
NC = 3
Description
The CD54AC280/3A and CD54ACT280/3A are 9-bit odd/
even parity generator/checkers that utilize the Harris
Advanced CMOS Logic technology. Both even and odd par-
ity outputs are available for checking or generating parity
words up to nine bits long. Even parity is indicated (
E out-
put is HIGH) when an even number of 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 accomplished by tying the
E
output to any output of an additional AC/ACT280 parity
checker.
The CD54AC280/3A and CD54ACT280/3A are supplied in
14 lead dual-in-line ceramic packages (F suffix).
ACT INPUT LOAD TABLE
INPUT
UNIT LOAD (NOTE 1)
All
1.43
NOTE:
1. Unit load is
I
CC
limit specified in DC Electrical Specifications
Table, e.g., 2.4mA Max at +25
o
C.
June 1997
File Number
3905
Absolute Maximum Ratings
DC Supply Voltage, V
CC
. . . . . . . . . . . . . . . . . . . . . . . . -0.5V to +6V
DC Input Diode Current, I
IK
For V
I
< -0.5V or V
I
> V
CC
+ 0.5V
. . . . . . . . . . . . . . . . . . . . . .
20mA
DC Output Diode Current, I
OK
For V
O
< -0.5V or V
O
> V
CC
+ 0.5V
. . . . . . . . . . . . . . . . . . . . .
50mA
DC Output Source or Sink Current, Per Output Pin, I
O
For V
O
> -0.5V or V
O
< V
CC
+ 0.5V
. . . . . . . . . . . . . . . . . . . . .
50mA
DC V
CC
or GND Current, I
CC
or I
GND
For Up to 4 Outputs Per Device, Add
25mA For Each
Additional Output
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
100mA
Power Dissipation Per Package, P
D
T
A
= -55
o
C to +100
o
C (Package F) . . . . . . . . . . . . . . . . . . 500mW
T
A
= +100
o
C to +125
o
C (Package F) . . . . . . . . Derate Linearly at
8mW/
o
C to 300mW
Operating Temperature Range, T
A
Package Type F . . . . . . . . . . . . . . . . . . . . . . . . . . -55
o
C to +125
o
C
Storage Temperature, T
STG
. . . . . . . . . . . . . . . . . . -65
o
C to +150
o
C
Lead Temperature (During Soldering)
At Distance 1/16in.
1/32in. (1.59mm
0.79mm)
From Case For 10s Max . . . . . . . . . . . . . . . . . . . . . . . . . . +265
o
C
Unit Inserted Into a PC Board (Min Thickness 1/16in., 1.59mm)
With Solder Contacting Lead Tips Only. . . . . . . . . . . . . . . +300
o
C
CAUTION: Stresses above those listed in "Absolute Maximum Ratings" may cause permanent damage to the device. This is a stress only rating and operation
of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied.
Recommended Operating Conditions
Supply Voltage Range, V
CC
Unless Otherwise Specified, All Voltages Referenced to GND
T
A
= Full Package Temperature Range
CD54AC Types . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.5V to 5.5V
CD54ACT Types . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4.5V to 5.5V
DC Input or Output Voltage, V
I
, V
O
. . . . . . . . . . . . . . . . . . 0V to V
CC
Operating Temperature, T
A
. . . . . . . . . . . . . . . . . . . -55
o
C to +125
o
C
Input Rise and Fall Slew Rate, dt/dv
at 1.5V to 3V (AC Types) . . . . . . . . . . . . . . . . . . . 0ns/V to 50ns/V
at 3.6V to 5.5V (AC Types) . . . . . . . . . . . . . . . . . 0ns/V to 20ns/V
at 4.5V to 5.5V (AC Types) . . . . . . . . . . . . . . . . . 0ns/V to 10ns/V
COMING SOON!
COMPLETE DATA SHEET
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