MC74F280 [MOTOROLA]
9-BIT PARITY GENERATOR/CHECKER; 9位奇偶校验发生器/校验器
| 型号： | MC74F280 |
| 厂家： | 
MOTOROLA |
| 描述： | 9-BIT PARITY GENERATOR/CHECKER |
| 文件： | 总3页 (文件大小：39K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
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
V
I
I
I
I
I
I
0
CC
14
5
4
3
2
1
J SUFFIX
CERAMIC
13
12
11
10
9
8
CASE 632-08
14
1
1
2
3
4
5
6
7
N SUFFIX
PLASTIC
CASE 646-06
I
I
NC
I
∑
∑
O
GND
6
7
8
E
14
1
LOGIC DIAGRAM
D SUFFIX
SOIC
CASE 751A-02
I
I
I
I
I
I
I
I
I
0
8
7
6
5
4
3
2
1
14
1
ORDERING INFORMATION
MC54FXXXJ
Ceramic
MC74FXXXN Plastic
MC74FXXXD SOIC
LOGIC SYMBOL
8
I
9 10 11 12 13 1
2 4
I
I
I
I
I
I
I
I
0
1
2
3
4
5
6
7 8
Σ
Σ
O
E
6
5
Σ
Σ
O
E
V
= PIN 14
CC
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
I -I
Outputs
∑ Even
∑ Odd
0 8
0, 2, 4, 6, 8
1, 3, 5, 7, 9
H
L
L
H
H = HIGH Voltage Level; L = LOW Voltage Level
GUARANTEED OPERATING RANGES
Symbol
Parameter
Min
4.5
-55
0
Typ
5.0
25
Max
5.5
125
70
Unit
V
V
CC
Supply Voltage
54, 74
54
°C
T
A
Operating Ambient Temperature Range
74
25
I
I
Output Current — High
Output Current — Low
54, 74
54, 74
–1.0
20
mA
mA
OH
OL
DC CHARACTERISTICS OVER OPERATING TEMPERATURE RANGE (unless otherwise specified)
Limits
Symbol
Parameter
Input HIGH Voltage
Min
Typ
Max
Unit
V
Test Conditions
V
IH
2.0
Guaranteed Input HIGH Voltage for All Inputs
Guaranteed Input LOW Voltage for All Inputs
V
V
V
Input LOW Voltage
0.8
V
IL
Input Clamp Diode Voltage
Output HIGH Voltage
–1.2
V
V
= MIN, I = –18 MA
IN
IK
CC
OH
OH
54, 74
74
2.5
2.7
3.4
3.4
V
I
I
I
= –1.0 mA
= 1.0 mA
V
= 4.5 V
= 4.75 V
= MIN
OH
CC
V
V
CC
V
OL
Output Low Voltage
Input HIGH Current
0.35
0.5
20
V
= 20 mA
V
CC
OL
I
µA
µA
mA
mA
mA
V
CC
V
CC
V
CC
V
CC
V
CC
= MAX, V = 2.7 V
IN
IH
100
–0.6
–150
38
= MAX, V = 7.0 V
IN
I
I
I
Input LOW Current
= MAX, V = 0.5 V
IN
IL
Short Circuit Current (Note 2)
Power Supply Current
–60
= MAX, V = 0 V
OUT
OS
CC
25
= 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
54/74F
= +25°C
54F
= –55°C to +125°C
74F
T
A
T
A
T = 0°C to +70°C
A
V
= +5.0 V
= 50 pF
V
= 5.0 V ±10%
V
CC
= 5.0 V ±10%
CC
CC
C
C
= 50 pF
C = 50 pF
L
L
L
Symbol
Parameter
Propagation Delay
to ∑
Min
Max
Min
4.5
4.5
4.5
4.5
Max
Min
4.5
4.5
4.5
4.5
Max
Unit
t
t
t
t
4.5
4.5
4.5
4.5
15
16
15
16
20
21
20
21
16
17
16
17
ns
PLH
PHL
PLH
PHL
I
n
E
Propagation Delay
to ∑
ns
I
n
O
FAST AND LS TTL DATA
4-145
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