HD74HC670 Datasheet, PDF (3/9 Pages) Hitachi Semiconductor – 4-by-4 Register File (with 3-state outputs)

HD74HC670
Logic Diagram
To other three bits
Data
D
G
D
Q
G
D
Q
G
Q
D
G
Q
VCC
Q
WA
RA
WB
GR
GW
RB
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
Output current
IIK, IOK
IOUT
±20
mA
±35
mA
VCC, GND current
ICC or IGND
±75
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.
Recommended Operating Conditions
Item
Symbol
Ratings
Supply voltage
VCC
2 to 6
Input / Output voltage
VIN, VOUT
0 to VCC
Operating temperature
Ta
–40 to 85
Input rise / fall time^*1
0 to 1000
tr, tf
0 to 500
0 to 400
Note: 1. This item guarantees maximum limit when one input switches.
Waveform: Refer to test circuit of switching characteristics.
Unit
V
V
°C
ns
Conditions
VCC = 2.0 V
VCC = 4.5 V
VCC = 6.0 V
Rev.2.00 Mar 30, 2006 page 3 of 8