74ACT8244 查看數據表（PDF） - STMicroelectronics
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74ACT8244 Datasheet PDF : 7 Pages
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74ACT8244
DC SPECIFICATIONS
Symbol
Parameter
Test Condition
VIH
VIL
VOH
VOL
VOH
VOL
VOH
VOL
II
ICCT
ICC
High Level Input Voltage
VO = 0.1 V or VCC-0.1V
Low Level Input Voltage
VO = 0.1 V or VCC-0.1V
High Level Output Voltage IO=-35mA
for Single Driver
Low Level Output Voltage for IO=35mA
Single Driver
High Level Output Voltage IO=-70mA
for Double Relay Driver
Low Level Output Voltage for IO=70mA
Double Relay Driver
High Level Output Voltage IO=-50mA
for Single Side Relay of LED
Low Level Output Voltage for IO=50mA
Single Side Relay of LED
Input Leakage Current
VI = VCC or GND
Max ICC/Input
VI = VCC - 2.1V
Quiescent Supply Current VI = VCC or GND
Min.
Value
Typ.
Unit
Max.
2.0
1.4
V
1.4
0.8
V
VCC-0.68 VCC-0.3
V
0.25
0.68
V
VCC-0.68 VCC-0.3
V
0.25
0.68
V
VCC-0.8 VCC-0.4
V
0.3
0.8
V
± 0.1
µA
0.6
1.5
mA
4
40
µA
AC ELECTRICAL CHARACTERISTICS (CL = 50 pF, RL = 500 Ω, Input tr = tf = 3ns)
Symbol
Parameter
tPLH tPHL Propagation Delay Time
Test Condition
Over recommended operating
conditions
Min.
Value
Typ.
7.0
Unit
Max.
11.0
ns
TRUTH TABLE FOR LATCHING RELAY
DRIVER
INPUT
OUTPUT
Condition
RST INnA INnB OUnA OUnB
H
X
X
L
L Storage
L
L
L
L
L Storage
L
L
H
L
H Operate
L
H
L
H
L Release
L
H
H
H
H Storage
Z : High Impedance
X : Don’t Care
n : 1,2,3
TRUTH TABLE FOR SINGLE SIDE RELAY
INPUT
IN4
L
H
OUTPUT
OUT4
H
L
TRUTH TABLE FOR LED DRIVER
INPUT
IN5
L
H
OUTPUT
OUT5
H
L
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