HD74HC668 Datasheet, PDF (5/11 Pages) Hitachi Semiconductor – Synchronous UP/Down Decade,4-bit binary Counter

HD74HC668, HD74HC669
HD74HC669
Load
A
B
Data
inputs
C
D
Clock
U/D
P and T
QA
QB
QC
QD
Ripple
carry
output
13
14
15
012
2
2
1
0
15
14
13
Load
Count up
Inhibit
Count down
Absolute Maximum Ratings
Item
Symbol
Ratings
Unit
Supply voltage range
VCC
–0.5 to 7.0
V
Input / Output voltage
VIN, VOUT
–0.5 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
–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.
Rev.2.00 Mar 30, 2006 page 5 of 10