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| HD74HC221 Datasheet, PDF (2/8 Pages) Hitachi Semiconductor – Dual Monostable Multivibrators (with Schmitt Trigger Input) | |||
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HD74HC221
Pin Arrangement
1A 1
1B 2
CLR1 3
1Q 4
2Q 5
Cext 2 6
2 Rext/
Cext
7
GND 8
CLR
Q
Q
Q
Q
CLR
(Top view)
16 VCC
15
1 Rext/
Cext
14 1 Cext
13 1Q
12 2Q
11 2CLR
10 2B
9 2A
Logic Diagram
VCC
Rext
Cext
A
B
Clear
Cext Rext
/Cext
Q
Q
Clear
Q
Absolute Maximum Ratings
Item
Symbol
Ratings
Unit
Supply voltage range
VCC
â0.5 to 7.0
V
Input / Output voltage
VIN, VOUT
â0.5 to VCC +0.5
V
Input / Output diode current
IIK, IOK
±20
mA
Output current
IO
±25
mA
VCC, GND current
ICC or IGND
±50
mA
Power dissipation
PT
500
mW
Storage temperature
Tstg
â65 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.
Rev.2.00 Jan 31, 2006 page 2 of 7
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