IN74HC21A
MAXIMUM RATINGS*
Symbol
Parameter
Value
-0.5 to +7.0
-1.5 to VCC +1.5
-0.5 to VCC +0.5
±20
Unit
V
VCC
DC Supply Voltage (Referenced to GND)
DC Input Voltage (Referenced to GND)
DC Output Voltage (Referenced to GND)
DC Input Current, per Pin
V
IN
V
VOUT
IIN
V
mA
mA
mA
mW
IOUT
ICC
DC Output Current, per Pin
±25
DC Supply Current, VCC and GND Pins
±50
PD
Power Dissipation in Still Air, Plastic DIP**
SOIC Package**
750
500
Tstg
TL
Storage Temperature
-65 to +150
260
°C
°C
Lead Temperature, 1 mm from Case for 10 Seconds
(Plastic DIP or SOIC Package)
*Maximum Ratings are those values beyond which damage to the device may occur.
Functional operation should be restricted to the Recommended Operating Conditions.
**Derating - Plastic DIP: - 10 mW/°C from 65° to 125°C
SOIC Package: : - 7 mW/°C from 65° to 125°C
RECOMMENDED OPERATING CONDITIONS
Symbol
VCC
Parameter
Min
2.0
0
Max
6.0
Unit
V
DC Supply Voltage (Referenced to GND)
DC Input Voltage, Output Voltage (Referenced to GND)
Operating Temperature, All Package Types
V , VOUT
IN
VCC
V
TA
-55
+125
°C
ns
tr, tf
Input Rise and Fall Time (Figure 1)
VCC =2.0 V
VCC =4.5 V
VCC =6.0 V
0
0
0
1000
500
400
This device contains protection circuitry to guard against damage due to high static voltages or electric
fields. However, precautions must be taken to avoid applications of any voltage higher than maximum rated voltages
to this high-impedance circuit. For proper operation, V and VOUT should be constrained to the range GND£(V or
IN
IN
VOUT)£VCC.
Unused inputs must always be tied to an appropriate logic voltage level (e.g., either GND or VCC). Unused
outputs must be left open.
INTEGRAL
2
