54ACT11280, 74ACT11280
9-BIT PARITY GENERATORS/CHECKERS
SCAS046A D3148, AUGUST 1988 REVISED APRIL 1993
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
Copyright
1993, Texas Instruments Incorporated
21
Inputs Are TTL-Voltage Compatible
Generates Either Odd or Even Parity for
Nine Data Lines
Cascadable for n-Bits Parity
Flow-Through Architecture Optimizes
PCB Layout
Center-Pin V
CC
and GND Configurations
Minimize High-Speed Switching Noise
EPIC
t
(Enhanced-Performance Implanted
CMOS) 1-
m
m Process
500-mA Typical Latch-Up Immunity
at 125
C
Package Options Include Plastic
Small-Outline Packages, Ceramic Chip
Carriers, and Standard Plastic and Ceramic
300-mil DIPs
description
These universal, monolithic, 9-bit parity
generators/checkers feature odd and even
outputs to facilitate operation of either an odd or
even parity application. The word-length
capability is easily expanded by cascading.
The 54ACT11280 is characterized for operation
over the full military temperature range of 55
C
to 125
C. The 74ACT11280 is characterized for
operation from 40
C to 85
C.
FUNCTION TABLE
NUMBER OF INPUTS
A THRU I
OUTPUTS
A THRU I
THAT ARE HIGH
S
EVEN
S
ODD
0, 2, 4, 6, 8
H
L
1, 3, 5, 7, 9
L
H
1
2
3
4
5
6
7
14
13
12
11
10
9
8
B
A
ODD
GND
EVEN
NC
I
C
D
E
V
CC
F
G
H
54ACT11280 . . . J PACKAGE
74ACT11280 . . . D OR N PACKAGE
(TOP VIEW)
3
2
1 20 19
9 10 11 12 13
4
5
6
7
8
18
17
16
15
14
G
NC
H
NC
I
C
NC
B
NC
A
54ACT11280 . . . FK PACKAGE
(TOP VIEW)
D
E
NC
NC
F
GND
NC
NC No internal connection
CC
V
EVEN
ODD
2k
I
H
G
F
E
D
C
B
A
7
8
9
10
12
13
14
1
2
ODD
EVEN
3
5
logic symbol
This symbol is in accordance with ANSI/IEEE Std 91-1984
and IEC Publication 617-12.
Pin numbers shown are for the D, J, and N packages.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
EPIC is a trademark of Texas Instruments Incorporated.
54ACT11280, 74ACT11280
9-BIT PARITY GENERATORS/CHECKERS
SCAS046A D3148, AUGUST 1988 REVISED APRIL 1993
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
22
logic diagram (positive logic)
I
H
G
F
E
D
C
B
A
7
8
9
10
12
13
14
1
2
ODD
EVEN
3
5
Pin numbers shown are for the D, J, and N packages.
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
Supply voltage range, V
CC
0.5 V to 7 V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Input voltage range, V
I
(see Note 1)
0.5 V to V
CC
+ 0.5 V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Output voltage range, V
O
(see Note 1)
0.5 V to V
CC
+ 0.5 V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Input clamp current, I
IK
(V
I
< 0 or V
I
> V
CC
)
20 mA
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Output clamp current, I
OK
(V
O
< 0 or V
O
> V
CC
)
50 mA
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Continuous output current, I
O
(V
O
= 0 to V
CC
)
50 mA
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Continuous current through V
CC
or GND
00 mA
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Storage temperature range
65
C to 150
C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Stresses beyond those listed under "absolute maximum ratings" may cause permanent damage to the device. These are stress ratings only and
functional operation of the device at these or any other conditions beyond those indicated under "recommended operating conditions" is not
implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
NOTE 1: The input and output voltage ratings may be exceeded if the input and output current ratings are observed.
54ACT11280, 74ACT11280
9-BIT PARITY GENERATORS/CHECKERS
SCAS046A D3148, AUGUST 1988 REVISED APRIL 1993
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
23
recommended operating conditions
54ACT11280
74ACT11280
UNIT
MIN
MAX
MIN
MAX
UNIT
VCC
Supply voltage
4.5
5.5
4.5
5.5
V
VIH
High-level input voltage
2
2
V
VIL
Low-level input voltage
0.8
0.8
V
VI
Input voltage
0
VCC
0
VCC
V
VO
Output voltage
0
VCC
0
VCC
V
IOH
High-level output current
24
24
mA
IOL
Low-level output current
24
24
mA
D
t /
D
v
Input transition rise or fall rate
0
10
0
10
ns/ V
TA
Operating free-air temperature
55
125
40
85
C
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
PARAMETER
TEST CONDITIONS
VCC
TA = 25
C
54ACT11280
74ACT11280
UNIT
PARAMETER
TEST CONDITIONS
VCC
MIN
TYP
MAX
MIN
MAX
MIN
MAX
UNIT
IOH = 50
m
A
4.5 V
4.4
4.4
4.4
IOH = 50
m
A
5.5 V
5.4
5.4
5.4
V
IOH = 24 mA
4.5 V
3.94
3.7
3.8
V
VOH
IOH = 24 mA
5.5 V
4.94
4.7
4.8
V
IOH = 50 mA
{
5.5 V
3.85
IOH = 75 mA
{
5.5 V
3.85
IOL = 50
m
A
4.5 V
0.1
0.1
0.1
IOL = 50
m
A
5.5 V
0.1
0.1
0.1
V
IOL = 24 mA
4.5 V
0.36
0.5
0.44
V
VOL
IOL = 24 mA
5.5 V
0.36
0.5
0.44
V
IOL = 50 mA
{
5.5 V
1.60
IOL = 75 mA
{
5.5 V
1.65
II
VI = VCC or GND
5.5 V
0.1
1
1
m
A
ICC
VI = VCC or GND, IO = 0
5.5 V
8
160
80
m
A
D
ICC
}
One input at 3.4 V,
Other inputs at GND or VCC
5.5 V
0.9
1
1
mA
Ci
VI = VCC or GND
5 V
3.5
pF
Not more than one output should be tested at a time and the duration of the test should not exceed 10 ms.
This is the increase in supply current for each input that is at one of the specified TTL voltage levels rather than 0 V or VCC.
switching characteristics over recommended ranges of supply voltage and operating free-air
temperature (unless otherwise noted) (see Figure 1)
PARAMETER
FROM
TO
TA = 25
C
54ACT11280
74ACT11280
UNIT
PARAMETER
(INPUT)
(OUTPUT)
MIN
TYP
MAX
MIN
MAX
MIN
MAX
UNIT
tPLH
Any input
S
EVEN
1.5
7.3
10.8
1.5
13.1
1.5
12.2
ns
tPHL
Any input
S
EVEN
1.5
8.8
12.5
1.5
15.6
1.5
14.3
ns
tPLH
Any input
S
ODD
1.5
7.3
10.8
1.5
12.9
1.5
12.1
ns
tPHL
Any input
S
ODD
1.5
8.6
12.4
1.5
15.7
1.5
14.3
ns
54ACT11280, 74ACT11280
9-BIT PARITY GENERATORS/CHECKERS
SCAS046A D3148, AUGUST 1988 REVISED APRIL 1993
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
24
operating characteristics, V
CC
= 5 V, T
A
= 25
C
PARAMETER
TEST CONDITIONS
TYP
UNIT
Cpd Power dissipation capacitance
CL = 50 pF, f = 1 MHz
56
pF
PARAMETER MEASUREMENT INFORMATION
LOAD CIRCUIT
From Output
Under Test
CL = 50 pF
(see Note A)
500
50% VCC
tPLH
tPHL
tPHL
tPLH
VOH
VOH
VOL
VOL
1.5 V
1.5 V
3 V
0 V
50% VCC
50% VCC
Input
(see Note B)
Out-of-Phase
Output
In-Phase
Output
50% VCC
VOLTAGE WAVEFORMS
NOTES: A. CL includes probe and jig capacitance.
B. Input pulses are supplied by generators having the following characteristics: PRR
10 MHz, ZO = 50
, tr = 3 ns, tf = 3 ns.
C. The outputs are measured one at a time with one input transition per measurement.
Figure 1. Load Circuit and Voltage Waveforms
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accordance with TI's standard warranty. Testing and other quality control techniques are utilized to the extent
TI deems necessary to support this warranty. Specific testing of all parameters of each device is not necessarily
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Copyright
1998, Texas Instruments Incorporated
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