74HC280; 74HCT280
9-bit odd/even parity generator/checker
Rev. 3 — 15 September 2016
Product data sheet
1. General description
The 74HC280; 74HCT280 is a 9-bit parity generator or checker. Both even and odd parity
outputs are available. The even parity output (PE) is HIGH when an even number of data
inputs (I0 to I8) is HIGH. The odd parity output (PO) is HIGH when an odd number of data
inputs are HIGH. Expansion to larger word sizes is accomplished by tying the even
outputs (PE) of up to nine parallel devices to the final stage data inputs. Inputs include
clamp diodes. It enables the use of current limiting resistors to interface inputs to voltages
in excess of V
CC
.
2. Features and benefits
Complies with JEDEC standard no. 7A
Input levels:
For 74HC280: CMOS level
For 74HCT280: TTL level
Word-length easily expanded by cascading
Generates either odd or even parity for nine data bits
ESD protection:
HBM JESD22-A114F exceeds 2000 V
MM JESD22-A115-A exceeds 200 V
Specified from
40 C
to +85
C
and
40 C
to +125
C
3. Ordering information
Table 1.
Ordering information
Temperature
range
40 C
to +125
C
40 C
to +125
C
Name
SO14
SSOP14
Description
plastic small outline package; 14 leads; body width
3.9 mm
plastic shrink small outline package; 14 leads; body
width 5.3 mm
Version
SOT108-1
SOT337-1
Type number
74HC280D
74HCT280D
74HCT280DB
Nexperia
74HC280; 74HCT280
9-bit odd/even parity generator/checker
4. Functional diagram
Fig 1.
Logic symbol
Fig 2.
Logic diagram
74HC_HCT280
All information provided in this document is subject to legal disclaimers.
.
Product data sheet
Rev. 3 — 15 September 2016
©
2 of 15
Nexperia B.V. 2017. All rights reserved
Nexperia
74HC280; 74HCT280
9-bit odd/even parity generator/checker
5. Pinning information
5.1 Pinning
Fig 3.
Pin configuration SO14
Fig 4.
Pin configuration SSOP14
5.2 Pin description
Table 2.
Symbol
I0, I1, I2, I3, I4, I5, I6, I7, I8
GND
PE
PO
V
CC
Pin description
Pin
8, 9, 10, 11, 12, 13, 1, 2, 4
7
5
6
14
Description
data input
ground (0 V)
even parity output
odd parity output
supply voltage
6. Functional description
Table 3.
Inputs
number of HIGH data inputs (I0 to I8)
even
odd
[1]
H = HIGH voltage level;
L = LOW voltage level
Function table
[1]
Outputs
PE
H
L
PO
L
H
74HC_HCT280
All information provided in this document is subject to legal disclaimers.
.
Product data sheet
Rev. 3 — 15 September 2016
©
3 of 15
Nexperia B.V. 2017. All rights reserved
Nexperia
74HC280; 74HCT280
9-bit odd/even parity generator/checker
7. Limiting values
Table 4.
Limiting values
In accordance with the Absolute Maximum Rating System (IEC 60134). Voltages are referenced to GND (ground = 0 V).
Symbol
V
CC
I
IK
I
OK
I
O
I
CC
I
GND
T
stg
P
tot
[1]
[2]
Parameter
supply voltage
input clamping current
output clamping current
output current
supply current
ground current
storage temperature
total power dissipation
Conditions
V
I
<
0.5
V or V
I
> V
CC
+ 0.5 V
V
O
<
0.5
V or V
O
> V
CC
+ 0.5 V
0.5
V < V
O
< V
CC
+ 0.5 V
[1]
[1]
Min
0.5
-
-
-
-
50
65
Max
+7
20
20
25
50
-
+150
500
Unit
V
mA
mA
mA
mA
mA
C
mW
SO14 and SSOP14 packages
[2]
-
The input and output voltage ratings may be exceeded if the input and output current ratings are observed.
For SO14 package: P
tot
derates linearly with 8 mW/K above 70
C.
For SSOP14 packages: P
tot
derates linearly with 5.5 mW/K above 60
C.
8. Recommended operating conditions
Table 5.
Recommended operating conditions
Voltages are referenced to GND (ground = 0 V)
Symbol Parameter
V
CC
V
I
V
O
T
amb
t/V
supply voltage
input voltage
output voltage
ambient temperature
input transition rise and fall rate
V
CC
= 2.0 V
V
CC
= 4.5 V
V
CC
= 6.0 V
Conditions
Min
2.0
0
0
40
-
-
-
74HC280
Typ
5.0
-
-
+25
-
1.67
-
Max
6.0
V
CC
V
CC
+125
625
139
83
Min
4.5
0
0
40
-
-
-
74HCT280
Typ
5.0
-
-
+25
-
1.67
-
Max
5.5
V
CC
V
CC
+125
-
139
-
V
V
V
C
ns/V
ns/V
ns/V
Unit
74HC_HCT280
All information provided in this document is subject to legal disclaimers.
.
Product data sheet
Rev. 3 — 15 September 2016
©
4 of 15
Nexperia B.V. 2017. All rights reserved
Nexperia
74HC280; 74HCT280
9-bit odd/even parity generator/checker
9. Static characteristics
Table 6.
Static characteristics
At recommended operating conditions; voltages are referenced to GND (ground = 0 V).
Symbol Parameter
74HC280
V
IH
HIGH-level
input voltage
V
CC
= 2.0 V
V
CC
= 4.5 V
V
CC
= 6.0 V
V
IL
LOW-level
input voltage
V
CC
= 2.0 V
V
CC
= 4.5 V
V
CC
= 6.0 V
V
OH
HIGH-level
V
I
= V
IH
or V
IL
output voltage
I
O
=
20 A;
V
CC
= 2.0 V
I
O
=
20 A;
V
CC
= 4.5 V
I
O
=
20 A;
V
CC
= 6.0 V
I
O
=
4.0
mA; V
CC
= 4.5 V
I
O
=
5.2
mA; V
CC
= 6.0 V
V
OL
LOW-level
V
I
= V
IH
or V
IL
output voltage
I
O
= 20
A;
V
CC
= 2.0 V
I
O
= 20
A;
V
CC
= 4.5 V
I
O
= 20
A;
V
CC
= 6.0 V
I
O
= 4.0 mA; V
CC
= 4.5 V
I
O
= 5.2 mA; V
CC
= 6.0 V
I
I
I
CC
C
I
input leakage
current
V
I
= V
CC
or GND; V
CC
= 6.0 V
1.5
3.15
4.2
-
-
-
1.9
4.4
5.9
1.2
2.4
3.2
0.8
2.1
2.8
2.0
4.5
6.0
-
-
-
0.5
1.35
1.8
-
-
-
-
-
0.1
0.1
0.1
0.26
0.26
0.1
8.0
-
1.5
3.15
4.2
-
-
-
1.9
4.4
5.9
3.84
5.34
-
-
-
-
-
-
-
-
-
-
-
0.5
1.35
1.8
-
-
-
-
-
0.1
0.1
0.1
0.33
0.33
1.0
80
-
1.5
3.15
4.2
-
-
-
1.9
4.4
5.9
3.7
5.2
-
-
-
-
-
-
-
-
-
-
-
0.5
1.35
1.8
-
-
-
-
-
0.1
0.1
0.1
0.4
0.4
1.0
160
-
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
A
A
pF
Conditions
Min
25
C
Typ
Max
40 C
to +85
C 40 C
to +125
C
Unit
Min
Max
Min
Max
3.98 4.32
5.48 5.81
-
-
-
-
-
-
-
-
0
0
0
0.15
0.16
-
-
3.5
supply current V
I
= V
CC
or GND; I
O
= 0 A;
V
CC
= 6.0 V
input
capacitance
HIGH-level
input voltage
LOW-level
input voltage
V
CC
= 4.5 V to 5.5 V
V
CC
= 4.5 V to 5.5 V
74HCT280
V
IH
V
IL
V
OH
2.0
-
1.6
1.2
-
0.8
2.0
-
-
0.8
2.0
-
-
0.8
V
V
HIGH-level
V
I
= V
IH
or V
IL
; V
CC
= 4.5 V
output voltage
I
O
=
20 A
I
O
=
4.0
mA
LOW-level
V
I
= V
IH
or V
IL
; V
CC
= 4.5 V
output voltage
I
O
= 20
A
I
O
= 4.0 mA
input leakage
current
V
I
= V
CC
or GND; V
CC
= 5.5 V
4.4
4.5
-
-
0.1
0.26
0.1
4.4
3.84
-
-
-
-
-
0.1
0.33
1.0
4.4
3.7
-
-
-
-
-
0.1
0.4
1.0
V
V
V
V
A
3.98 4.32
-
-
-
0
0.15
-
V
OL
I
I
74HC_HCT280
All information provided in this document is subject to legal disclaimers.
.
Product data sheet
Rev. 3 — 15 September 2016
©
5 of 15
Nexperia B.V. 2017. All rights reserved
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