HD74HC21
Pin Arrangement
1A
1B
NC
1C
1D
1Y
GND
1
2
3
4
5
6
7
(Top view)
14 V
CC
13 2D
12 2C
11 NC
10 2B
9
8
2A
2Y
Absolute Maximum Ratings
Item
Supply voltage range
Input / Output voltage
Input / Output diode current
Output current
V
CC
, GND current
Power dissipation
Symbol
V
CC
Vin, Vout
I
IK
, I
OK
I
O
I
CC
or I
GND
P
T
Ratings
–0.5 to 7.0
–0.5 to V
CC
+0.5
±20
±25
±50
500
Unit
V
V
mA
mA
mA
mW
Storage temperature
Tstg
–65 to +150
°C
Note: The absolute maximum ratings are values, which must not individually be exceeded, and furthermore, no two of
which may be realized at the same time.
Recommended Operating Conditions
Item
Supply voltage
Input / Output voltage
Operating temperature
Input rise / fall time
Note:
*1
Symbol
V
CC
V
IN
, V
OUT
Ta
t
r
, t
f
Ratings
2 to 6
0 to V
CC
–40 to 85
0 to 1000
0 to 500
Unit
V
V
°C
ns
Conditions
V
CC
= 2.0 V
V
CC
= 4.5 V
V
CC
= 6.0 V
0 to 400
1. This item guarantees maximum limit when one input switches.
Waveform: Refer to test circuit of switching characteristics.
Rev.2.00, Oct 06, 2005 page 2 of 6