M74HC21TTR View Datasheet(PDF) - STMicroelectronics
Part Name
Description
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M74HC21TTR Datasheet PDF : 8 Pages
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M74HC21
INPUT AND OUTPUT EQUIVALENT CIRCUIT
PIN DESCRIPTION
PIN No
1, 9
2, 10
3, 11
4, 12
5, 13
6, 8
7
14
SYMBOL
1A to 2A
1B to 2B
N.C.
1C to 2C
1D to 2D
1Y to 2Y
GND
VCC
NAME AND FUNCTION
Data Inputs
Data Inputs
Not Connected
Data Inputs
Data Inputs
Data Outputs
Ground (0V)
Positive Supply Voltage
TRUTH TABLE
A
B
C
D
Y
L
X
X
X
L
X
L
X
X
L
X
X
L
X
L
X
X
X
L
L
H
H
H
H
H
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
± 20
mA
IOK
DC Output Diode Current
± 20
mA
IO
DC Output Current
± 25
mA
ICC or IGND DC VCC or Ground Current
± 50
mA
PD
Power Dissipation
500(*)
mW
Tstg Storage Temperature
-65 to +150
°C
TL
Lead Temperature (10 sec)
300
°C
Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these conditions is
not implied
(*) 500mW at 65 °C; derate to 300mW by 10mW/°C from 65°C to 85°C
RECOMMENDED OPERATING CONDITIONS
Symbol
VCC
VI
VO
Top
tr, tf
Supply Voltage
Input Voltage
Output Voltage
Operating Temperature
Input Rise and Fall Time
Parameter
VCC = 2.0V
VCC = 4.5V
VCC = 6.0V
Value
Unit
2 to 6
V
0 to VCC
V
0 to VCC
V
-55 to 125
°C
0 to 1000
ns
0 to 500
ns
0 to 400
ns
2/8
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