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參數(shù)資料
| 型號(hào)： | MC74F158D |
| 廠商： | MOTOROLA INC |
| 元件分類： | 通用總線功能 |
| 英文描述： | QUAD 2-INPUT MULTIPLEXER |
| 中文描述： | F/FAST SERIES, QUAD 2 LINE TO 1 LINE MULTIPLEXER, INVERTED OUTPUT, PDSO16 |
| 封裝： | PLASTIC, SOIC-16 |
| 文件頁數(shù)： | 2/2頁 |
| 文件大?。?/td> | 58K |
| 代理商： | MC74F158D |
4-70
FAST AND LS TTL DATA
MC74F158A
GUARANTEED OPERATING RANGES
Symbol
Parameter
Min
Typ
Max
Unit
VCC
TA
IOH
IOL
Supply Voltage
74
4.5
5.0
5.5
V
Operating Ambient Temperature Range
74
0
25
70
°
C
Output Current — High
74
–1.0
mA
Output Current — Low
74
20
mA
DC CHARACTERISTICS OVER OPERATING TEMPERATURE RANGE
(unless otherwise specified)
Limits
Symbol
Parameter
Min
Typ
Max
Unit
Test Conditions
VIH
VIL
VIK
VOH
Input HIGH Voltage
2.0
V
Guaranteed Input HIGH Voltage
Input LOW Voltage
0.8
V
Guaranteed Input LOW Voltage
Input Clamp Diode Voltage
–1.2
V
IIN = –18 mA
IOH = –1.0 mA
VCC = MIN
VCC = 4.75 V
VCC = 4.50 V
VCC = MIN
VCC = MAX
Output HIGH Voltage
74
2.7
3.4
V
74
2.5
VOL
IIH
Output LOW Voltage
0.35
0.5
V
IOL = 20 mA
VIN = 2.7 V
VIN = 7.0 V
VIN = 0.5 V
VOUT = 0 V
VCC = MAX, VIN = HIGH
Input HIGH Current
20
μ
A
μ
A
100
IIL
IOS
ICC
NOTES:
1. For conditions shown as MIN or MAX, use the appropriate value specified under guaranteed operating ranges.
2. Not more than one output should be shorted at a time, nor for more than 1 second.
3. ICC measured with outputs open and 4.5 V applied to all inputs.
Input LOW Current
–0.6
mA
VCC = MAX
VCC = MAX
Output Short Circuit Current (Note 2)
–60
–150
mA
Power Supply Current (Note 3)
10
15
mA
AC CHARACTERISTICS
74F
74F
TA = +25
°
C
VCC = +5.0 V
CL = 50 pF
Min
TA = 0
°
C to 70
°
C
VCC = 5.0 V
±
10%
CL = 50 pF
Min
Symbol
Parameter
Max
Max
Unit
tPLH
tPHL
tPLH
tPHL
tPLH
tPHL
Propagation Delay
3.0
8.5
3.0
9.5
ns
S to Z
2.5
6.5
2.5
7.0
Propagation Delay
2.5
6.0
2.5
7.0
ns
E to Zn
Propagation Delay
2.0
6.0
2.0
6.5
2.0
5.9
2.0
7.0
ns
In to Z
1.0
4.0
1.0
4.5
FUNCTIONAL DESCRIPTION
The F158A quad 2-input multiplexer selects four bits of data
from two sources under the control of a common Select input
(S) and presents the data in inverted form at the four outputs.
The Enable input (E) is active LOW. When E is HIGH, all of the
outputs (Z) are forced HIGH regardless of all other inputs. The
F158A is the logic implementation of a 4-pole, 2-position
switch where the position of the switch is determined by the
logic levels supplied to the Select input.
A common use of the F158A is the moving of data from two
groups of registers to four common output busses. The partic-
ular register from which the data comes is determined by the
state of the Select input. A less obvious use is as a function
generator. The F158A can generate four functions of two vari-
ables with one variable in common. This is useful for imple-
menting gating functions.
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