M54HC279(1993) 查看數據表（PDF） - STMicroelectronics
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M54HC279 Datasheet PDF : 10 Pages
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M54/M74HC279
PIN DESCRIPTION
PIN No SYMBOL
1, 5, 10. 14 1R to 4R
2, 3, 6, 11, 1S1, 1S2, 2S,
12, 15 3S1, 3S2, 4S
4, 7, 9, 13 1Q to 4Q
8
GND
16
VCC
NAME AND FUNCTION
Reset Inputs (Active LOW)
Set Inputs (Active LOW)
Outputs
Ground (0V)
Positive Supply Voltage
IEC LOGIC SYMBOL
TRUTH TABLE
S#
R
Q
H
H
Q0
L
H
H
H
L
L
L
L
H
NOTE: Q0 = THE LEVEL OF Q BEFORE THE INDICRTED INPUT
CONDITION WAS ESTABLISHED.
# FOR LATCHES WITH DOUBLE S INPUT:
H = BOTH S INPUTS HIGH
L = ONE OF BOTH INPUTS LOW
LOGIC DIAGRAM
ABSOLUTE MAXIMUM RATINGS
Symbol
Parameter
Value
Unit
VCC
Supply Voltage
-0.5 to +7
V
VI
DC Input Voltage
-0.5 to VCC + 0.5
V
VO
DC Output Voltage
-0.5 to VCC + 0.5
V
IIK
DC Input Diode Current
IOK
DC Output Diode Current
± 20
mA
± 20
mA
IO
DC Output Source Sink Current Per Output Pin
± 25
mA
ICC or IGND DC VCC or Ground Current
± 50
mA
PD
Power Dissipation
500 (*)
mW
Tstg
Storage Temperature
-65 to +150
oC
TL
Lead Temperature (10 sec)
300
oC
Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these condition isnotimplied.
(*) 500 mW: ≅ 65 oC derate to 300 mW by 10mW/oC: 65 oC to 85 oC
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