1
Data sheet acquired from Harris Semiconductor
SCHS250A
Features
Buffered Inputs
Typical Propagation Delay
- 10ns at V
CC
= 5V, T
A
= 25
o
C, C
L
= 50pF
Exceeds 2kV ESD Protection per MIL-STD-883,
Method 3015
SCR-Latchup-Resistant CMOS Process and Circuit
Design
Speed of Bipolar FASTTM/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 FASTTM ICs
- Drives 50
Transmission Lines
Description
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
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.
Pinout
CD54AC280, CD54ACT280
(CERDIP)
CD74AC280, CD74ACT280
(PDIP, SOIC)
TOP VIEW
Functional Diagram
Ordering Information
PART
NUMBER
TEMP.
RANGE (
o
C)
PACKAGE
CD54AC280F3A
-55 to 125
14 Ld CERDIP
CD74AC280E
0 to 70
o
C, -40 to 85,
-55 to 125
14 Ld PDIP
CD74AC280M
0 to 70
o
C, -40 to 85,
-55 to 125
14 Ld SOIC
CD54ACT280F3A
-55 to 125
14 Ld CERDIP
CD74ACT280E
0 to 70
o
C, -40 to 85,
-55 to 125
14 Ld PDIP
CD74ACT280M
0 to 70
o
C, -40 to 85,
-55 to 125
14 Ld SOIC
NOTES:
1. When ordering, use the entire part number. Add the suffix 96 to
obtain the variant in the tape and reel.
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.
I6
I7
NC
I8
E
O
GND
V
CC
I5
I4
I3
I2
I1
I0
1
2
3
4
5
6
7
14
13
12
11
10
9
8
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
August 1998 - Revised May 2000
CAUTION: These devices are sensitive to electrostatic discharge. Users should follow proper IC Handling Procedures.
FASTTM is a Trademark of Fairchild Semiconductor.
Copyright
2000, Texas Instruments Incorporated
CD54/74AC280,
CD54/74ACT280
9-Bit Odd/Even Parity Generator/Checker
2
F
Absolute Maximum Ratings
Thermal Information
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 Ground Current, I
CC or
I
GND
(Note 3)
. . . . . . . . .
100mA
Operating Conditions
Temperature Range, T
A
. . . . . . . . . . . . . . . . . . . . . . -55
o
C to 125
o
C
Supply Voltage Range, V
CC
(Note 4)
AC Types. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.5V to 5.5V
ACT Types . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4.5V to 5.5V
DC Input or Output Voltage, V
I
, V
O
. . . . . . . . . . . . . . . . . 0V to V
CC
Input Rise and Fall Slew Rate, dt/dv
AC Types, 1.5V to 3V . . . . . . . . . . . . . . . . . . . . . . . . . 50ns (Max)
AC Types, 3.6V to 5.5V . . . . . . . . . . . . . . . . . . . . . . . . 20ns (Max)
ACT Types, 4.5V to 5.5V. . . . . . . . . . . . . . . . . . . . . . . 10ns (Max)
Thermal Resistance (Typical, Note 5)
JA
(
o
C/W)
PDIP Package . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
___
SOIC Package . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
___
Maximum Junction Temperature (Plastic Package) . . . . . . . . . . 150
o
C
Maximum Storage Temperature Range . . . . . . . . . .-65
o
C to 150
o
C
Maximum Lead Temperature (Soldering 10s) . . . . . . . . . . . . . 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.
NOTES:
3. For up to 4 outputs per device, add
25mA for each additional output.
4. Unless otherwise specified, all voltages are referenced to ground.
5.
JA
is measured with the component mounted on an evaluation PC board in free air.
DC Electrical Specifications
PARAMETER
SYMBOL
TEST
CONDITIONS
V
CC
(V)
25
o
C
-40
o
C TO
85
o
C
-55
o
C TO
125
o
C
UNITS
V
I
(V)
I
O
(mA)
MIN
MAX
MIN
MAX
MIN
MAX
AC TYPES
High Level Input Voltage
V
IH
-
-
1.5
1.2
-
1.2
-
1.2
-
V
3
2.1
-
2.1
-
2.1
-
V
5.5
3.85
-
3.85
-
3.85
-
V
Low Level Input Voltage
V
IL
-
-
1.5
-
0.3
-
0.3
-
0.3
V
3
-
0.9
-
0.9
-
0.9
V
5.5
-
1.65
-
1.65
-
1.65
V
High Level Output Voltage
V
OH
V
IH
or V
IL
-0.05
1.5
1.4
-
1.4
-
1.4
-
V
-0.05
3
2.9
-
2.9
-
2.9
-
V
-0.05
4.5
4.4
-
4.4
-
4.4
-
V
-4
3
2.58
-
2.48
-
2.4
-
V
-24
4.5
3.94
-
3.8
-
3.7
-
V
-75
(Note 6, 7)
5.5
-
-
3.85
-
-
-
V
-50
(Note 6, 7)
5.5
-
-
-
-
3.85
-
V
CD54/74AC280, CD54/74ACT280
3
Low Level Output Voltage
V
OL
V
IH
or V
IL
0.05
1.5
-
0.1
-
0.1
-
0.1
V
0.05
3
-
0.1
-
0.1
-
0.1
V
0.05
4.5
-
0.1
-
0.1
-
0.1
V
12
3
-
0.36
-
0.44
-
0.5
V
24
4.5
-
0.36
-
0.44
-
0.5
V
75
(Note 6, 7)
5.5
-
-
-
1.65
-
-
V
50
(Note 6, 7)
5.5
-
-
-
-
-
1.65
V
Input Leakage Current
I
I
V
CC
or
GND
-
5.5
-
0.1
-
1
-
1
A
Quiescent Supply Current
MSI
I
CC
V
CC
or
GND
0
5.5
-
8
-
80
-
160
A
ACT TYPES
High Level Input Voltage
V
IH
-
-
4.5 to
5.5
2
-
2
-
2
-
V
Low Level Input Voltage
V
IL
-
-
4.5 to
5.5
-
0.8
-
0.8
-
0.8
V
High Level Output Voltage
V
OH
V
IH
or V
IL
-0.05
4.5
4.4
-
4.4
-
4.4
-
V
-24
4.5
3.94
-
3.8
-
3.7
-
V
-75
(Note 6, 7)
5.5
-
-
3.85
-
-
-
V
-50
(Note 6, 7)
5.5
-
-
-
-
3.85
-
V
Low Level Output Voltage
V
OL
V
IH
or V
IL
0.05
4.5
-
0.1
-
0.1
-
0.1
V
24
4.5
-
0.36
-
0.44
-
0.5
V
75
(Note 6, 7)
5.5
-
-
-
1.65
-
-
V
50
(Note 6, 7)
5.5
-
-
-
-
-
1.65
V
Input Leakage Current
I
I
V
CC
or
GND
-
5.5
-
0.1
-
1
-
1
A
Quiescent Supply Current
MSI
I
CC
V
CC
or
GND
0
5.5
-
8
-
80
-
160
A
Additional Supply Current per
Input Pin TTL Inputs High
1 Unit Load
I
CC
V
CC
-2.1
-
4.5 to
5.5
-
2.4
-
2.8
-
3
mA
NOTES:
6. Test one output at a time for a 1-second maximum duration. Measurement is made by forcing current and measuring voltage to minimize
power dissipation.
7. Test verifies a minimum 50
transmission-line-drive capability at 85
o
C, 75
at 125
o
C.
ACT Input Load Table
INPUT
UNIT LOAD
All
1.43
NOTE: Unit load is
I
CC
limit specified in DC Electrical Specifications
Table, e.g., 2.4mA max at 25
o
C.
DC Electrical Specifications
(Continued)
PARAMETER
SYMBOL
TEST
CONDITIONS
V
CC
(V)
25
o
C
-40
o
C TO
85
o
C
-55
o
C TO
125
o
C
UNITS
V
I
(V)
I
O
(mA)
MIN
MAX
MIN
MAX
MIN
MAX
CD54/74AC280, CD54/74ACT280
4
Switching Specifications
Input t
r
, t
f
= 3ns, C
L
= 50pF (Worst Case)
PARAMETER
SYMBOL
V
CC
(V)
-40
o
C TO 85
o
C
-55
o
C TO 125
o
C
UNITS
MIN
TYP
MAX
MIN
TYP
MAX
AC TYPES
Propagation Delay,
Any Input to
O
t
PLH
, t
PHL
1.5
-
-
239
-
-
263
ns
3.3
(Note 9)
7.5
-
26
7.3
-
29
ns
5
(Note 10)
5.4
-
19.1
5.3
-
21
ns
Propagation Delay,
Any Input to
E
t
PLH
, t
PHL
1.5
-
-
227
-
-
250
ns
3.3
7.2
-
25
7
-
28
ns
5
5.2
-
18.2
5
-
20
ns
Input Capacitance
C
I
-
-
-
10
-
-
10
pF
Power Dissipation Capacitance
C
PD
(Note 11)
-
-
115
-
-
115
-
pF
ACT TYPES
Propagation Delay,
Any Input to
O
t
PLH
, t
PHL
5
(Note 10)
5.6
-
19.6
5.4
-
21.6
ns
Propagation Delay,
Any Input to
E
t
PLH
, t
PHL
5
5.6
-
19.6
5.4
-
21.6
ns
Input Capacitance
C
I
-
-
-
10
-
-
10
pF
Power Dissipation Capacitance
C
PD
(Note 11)
-
-
115
-
-
115
-
pF
NOTES:
8. Limits tested 100%
9. 3.3V Min is at 3.6V, Max is at 3V.
10. 5V Min is at 5.5V, Max is at 4.5V.
11. C
PD
is used to determine the dynamic power consumption per package.
AC: P
D
= V
CC
2
f
i
(C
PD
+ C
L
)
ACT: P
D
= V
CC
2
f
i
(C
PD
+ C
L
) + V
CC
I
CC
where f
i
= input frequency, C
L
= output load capacitance, V
CC
= supply voltage.
FIGURE 1.
10%
V
S
t
r
= 3ns
V
S
t
PHL
t
PLH
V
S
V
S
V
S
V
S
t
f
= 3ns
10%
INPUT
LEVEL
I
n
0V
O
E
0V
0V
t
PLH
t
PHL
DUT
OUTPUT
R
L
(NOTE)
OUTPUT
LOAD
500
C
L
50pF
NOTE: For AC Series Only: When V
CC
= 1.5V, R
L
= 1k
.
FIGURE 2. PROPAGATION DELAY TIMES
AC
ACT
Input Level
V
CC
3V
Input Switching Voltage, V
S
0.5 V
CC
1.5V
Output Switching Voltage, V
S
0.5 V
CC
0.5 V
CC
CD54/74AC280, CD54/74ACT280
PACKAGING INFORMATION
Orderable Device
Status
(1)
Package
Type
Package
Drawing
Pins Package
Qty
Eco Plan
(2)
Lead/Ball Finish
MSL Peak Temp
(3)
CD54AC280F3A
ACTIVE
CDIP
J
14
1
TBD
Call TI
Level-NC-NC-NC
CD54ACT280F3A
ACTIVE
CDIP
J
14
1
TBD
Call TI
Level-NC-NC-NC
CD74AC280E
ACTIVE
PDIP
N
14
25
Pb-Free
(RoHS)
CU NIPDAU
Level-NC-NC-NC
CD74AC280M
ACTIVE
SOIC
D
14
50
Pb-Free
(RoHS)
CU NIPDAU
Level-2-260C-1 YEAR/
Level-1-235C-UNLIM
CD74AC280M96
ACTIVE
SOIC
D
14
2500
Pb-Free
(RoHS)
CU NIPDAU
Level-2-260C-1 YEAR/
Level-1-235C-UNLIM
CD74AC280M96E4
ACTIVE
SOIC
D
14
2500
Pb-Free
(RoHS)
CU NIPDAU
Level-2-260C-1 YEAR/
Level-1-235C-UNLIM
CD74AC280ME4
ACTIVE
SOIC
D
14
50
Pb-Free
(RoHS)
CU NIPDAU
Level-2-260C-1 YEAR/
Level-1-235C-UNLIM
CD74ACT280E
ACTIVE
PDIP
N
14
25
Pb-Free
(RoHS)
CU NIPDAU
Level-NC-NC-NC
CD74ACT280EE4
ACTIVE
PDIP
N
14
25
Pb-Free
(RoHS)
CU NIPDAU
Level-NC-NC-NC
CD74ACT280M
ACTIVE
SOIC
D
14
50
Pb-Free
(RoHS)
CU NIPDAU
Level-2-260C-1 YEAR/
Level-1-235C-UNLIM
CD74ACT280M96
ACTIVE
SOIC
D
14
2500
Pb-Free
(RoHS)
CU NIPDAU
Level-2-260C-1 YEAR/
Level-1-235C-UNLIM
CD74ACT280M96E4
ACTIVE
SOIC
D
14
2500
Pb-Free
(RoHS)
CU NIPDAU
Level-2-260C-1 YEAR/
Level-1-235C-UNLIM
CD74ACT280ME4
ACTIVE
SOIC
D
14
50
Pb-Free
(RoHS)
CU NIPDAU
Level-2-260C-1 YEAR/
Level-1-235C-UNLIM
(1)
The marketing status values are defined as follows:
ACTIVE: Product device recommended for new designs.
LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect.
NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in
a new design.
PREVIEW: Device has been announced but is not in production. Samples may or may not be available.
OBSOLETE: TI has discontinued the production of the device.
(2)
Eco
Plan
-
The
planned
eco-friendly
classification:
Pb-Free
(RoHS)
or
Green
(RoHS
&
no
Sb/Br)
-
please
check
http://www.ti.com/productcontent
for the latest availability information and additional product content details.
TBD: The Pb-Free/Green conversion plan has not been defined.
Pb-Free (RoHS): TI's terms "Lead-Free" or "Pb-Free" mean semiconductor products that are compatible with the current RoHS requirements
for all 6 substances, including the requirement that lead not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered
at high temperatures, TI Pb-Free products are suitable for use in specified lead-free processes.
Green (RoHS & no Sb/Br): TI defines "Green" to mean Pb-Free (RoHS compatible), and free of Bromine (Br) and Antimony (Sb) based flame
retardants (Br or Sb do not exceed 0.1% by weight in homogeneous material)
(3)
MSL, Peak Temp. -- The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder
temperature.
Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is
provided. TI bases its knowledge and belief on information provided by third parties, and makes no representation or warranty as to the
accuracy of such information. Efforts are underway to better integrate information from third parties. TI has taken and continues to take
reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on
incoming materials and chemicals. TI and TI suppliers consider certain information to be proprietary, and thus CAS numbers and other limited
information may not be available for release.
In no event shall TI's liability arising out of such information exceed the total purchase price of the TI part(s) at issue in this document sold by TI
PACKAGE OPTION ADDENDUM
www.ti.com
6-Jun-2005
Addendum-Page 1
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