MC74F568 查看數據表（PDF） - Motorola => Freescale
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MC74F568 Datasheet PDF : 7 Pages
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MC54/74F568 • MC54/74F569
COUNT
CP
Figure A. Multistage Counter with Ripple Carry
CET TC
CET TC
CET TC
CET TC
CET
CP
TO ALL STAGES
Figure B. Multistage Counter with Lookahead Carry
COUNT
CET TC
CEP
CEP
CEP
CEP
CP
L
CET TC
CET TC
CET TC
CET
CP
TO ALL STAGES
DC CHARACTERISTICS OVER OPERATING TEMPERATURE RANGE (unless otherwise specified)
Symbol
Parameter
Limits
Unit
Min
Typ
Max
Test Conditions
VIH
Input HIGH Voltage
2.0
Guaranteed Input HIGH Voltage for
V
All Inputs
VIL
Input LOW Voltage
0.8
V
Guaranteed Input LOW Voltage for
All Inputs
VIK
Input Clamp Diode Voltage
VOH
Output HIGH Voltage
54, 74
2.4
74
2.7
VOL
IOZH
IOZL
Output LOW Voltage
Output OFF Current — HIGH
Output OFF Current — LOW
IIH
Input HIGH Current
Input LOW Current
IIL
PE, CET
Others
– 1.2
V
VCC = MIN, IIN = – 18 mA
3.3
V
IOH = – 3.0 mA VCC = 4.5 V
3.3
V
IOH = – 3.0 mA VCC = 4.75 V
0.3
0.5
V
IOL = 24 mA
VCC = MIN
50
µA
VOUT = 2.7 V
VCC = MAX
– 50
µA
VOUT = 0.5 V
VCC = MAX
20
VIN = 2.7 V
µA
VCC = MAX
100
VIN = 7.0 V
–1.2
mA
VCC = MAX, VIN = 0.5 V
–0.6
IOS
Output Short Circuit Current (Note 2)
– 60
–150
mA
VOUT = 0 V
VCC = MAX
ICC
Power Supply Current
(ALL Outputs OFF)
67
mA
VCC = MAX
NOTES:
1. For conditions such 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
4-223
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