MOTOROLA MC74F280N

MC54/74F280
9-BIT PARITY GENERATOR/
CHECKER
The MC54/74F280 is a high-speed parity generator/checker that accepts
nine bits of input data and detects whether an even or an odd number of these
inputs is HIGH. If an even number of inputs is HIGH, the Sum Even output is
HIGH. If an odd number is HIGH, the Sum Even output is LOW. The Sum Odd
output is the complement of the Sum Even output.
9-BIT PARITY
GENERATOR/CHECKER
FAST SCHOTTKY TTL
CONNECTION DIAGRAM
VCC
I5
I4
I3
I2
I1
I0
14
13
12
11
10
9
8
J SUFFIX
CERAMIC
CASE 632-08
14
1
1
2
3
4
5
6
7
I6
I7
NC
I8
∑E
∑O
GND
N SUFFIX
PLASTIC
CASE 646-06
14
1
LOGIC DIAGRAM
I8
I7
I6
I5
I4
I3
I2
I1
I0
D SUFFIX
SOIC
CASE 751A-02
14
1
ORDERING INFORMATION
MC54FXXXJ
MC74FXXXN
MC74FXXXD
Ceramic
Plastic
SOIC
LOGIC SYMBOL
8 9 10 11 12 13 1 2 4
I0 I1 I2 I3 I4 I5 I6 I7 I8
ΣO
ΣO
6
ΣE
ΣE
5
VCC = PIN 14
GND = PIN 7
NOTE:
This diagram is provided only for the understanding of logic operations and should not
be used to estimate propagation delays.
FAST AND LS TTL DATA
4-143
MC54/74F280
FUNCTION TABLE
Number of HIGH Inputs
Outputs
∑ Even
∑ Odd
0, 2, 4, 6, 8
H
L
1, 3, 5, 7, 9
L
H
I0-I8
H = HIGH Voltage Level; L = LOW Voltage Level
GUARANTEED OPERATING RANGES
Symbol
Parameter
VCC
Supply Voltage
TA
Operating Ambient Temperature Range
Min
Typ
Max
Unit
54, 74
4.5
5.0
5.5
V
54
-55
25
125
°C
74
0
25
70
IOH
Output Current — High
54, 74
–1.0
mA
IOL
Output Current — Low
54, 74
20
mA
DC CHARACTERISTICS OVER OPERATING TEMPERATURE RANGE (unless otherwise specified)
Limits
Symbol
Parameter
Min
Typ
Max
Test Conditions
V
Guaranteed Input HIGH Voltage for All Inputs
VIH
Input HIGH Voltage
VIL
Input LOW Voltage
0.8
V
Guaranteed Input LOW Voltage for All Inputs
VIK
Input Clamp Diode Voltage
–1.2
V
VCC = MIN, IIN = –18 MA
VOH
Output HIGH Voltage
VOL
Output Low Voltage
IIH
Input HIGH Current
IIL
Input LOW Current
IOS
Short Circuit Current (Note 2)
ICC
Power Supply Current
2.0
Unit
54, 74
2.5
3.4
V
IOH = –1.0 mA
VCC = 4.5 V
74
2.7
3.4
V
IOH = 1.0 mA
VCC = 4.75 V
0.5
V
IOL = 20 mA
VCC = MIN
20
µA
VCC = MAX, VIN = 2.7 V
100
µA
VCC = MAX, VIN = 7.0 V
0.35
–60
25
–0.6
mA
VCC = MAX, VIN = 0.5 V
–150
mA
VCC = MAX, VOUT = 0 V
38
mA
VCC = MAX
NOTES:
1. For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions for the applicable device type.
2. Not more than one output should be shorted at a time, nor for more than 1 second.
FAST AND LS TTL DATA
4-144
MC54/74F280
AC CHARACTERISTICS
Symbol
Parameter
54/74F
54F
74F
TA = +25°C
TA = –55°C to +125°C
TA = 0°C to +70°C
VCC = +5.0 V
VCC = 5.0 V ±10%
VCC = 5.0 V ±10%
CL = 50 pF
CL = 50 pF
CL = 50 pF
Min
Max
Min
Max
Min
Max
Unit
ns
tPLH
Propagation Delay
4.5
15
4.5
20
4.5
16
tPHL
In to ∑E
4.5
16
4.5
21
4.5
17
tPLH
Propagation Delay
4.5
15
4.5
20
4.5
16
tPHL
In to ∑O
4.5
16
4.5
21
4.5
17
FAST AND LS TTL DATA
4-145
ns