HD74LS77 Datasheet, PDF (2/5 Pages) Hitachi Semiconductor – 4-bit Bistable Latches

HD74LS77
Block Diagram (1/4)
Data
To Other
Q
Latch
Enable
Absolute Maximum Ratings
Item
Symbol
Ratings
Unit
Supply voltage
VCC
7
V
Input voltage
VIN
7
V
Power dissipation
Storage temperature
PT
400
mW
Tstg
–65 to +150
°C
Note: Voltage value, unless otherwise noted, are with respect to network ground terminal.
Recommended Operating Conditions
Item
Supply voltage
Output current
Operating temperature
Pulse width
Setup time
Hold time
Symbol
VCC
IOH
IOL
Topr
tw
tsu
th
Min
4.75
—
—
–20
20
20
5
Typ
5.00
—
—
25
—
—
—
Max
5.25
–400
8
75
—
—
—
Unit
V
µA
mA
°C
ns
ns
ns
Electrical Characteristics
Item
Input voltage
Symbol
VIH
VIL
min.
2.0
—
typ.* max. Unit
—
—
V
—
0.8
V
Output voltage
VOH
2.7
—
—
V
—
—
0.4
VOL
V
—
—
0.5
D
—
—
20
IIH
µA
G
—
—
80
D
—
—
–0.4
Input current
IIL
mA
G
—
—
–1.6
D
—
—
0.1
II
mA
G
—
—
0.4
Short-circuit output
current
IOS
–20
—
–100
mA
Supply current**
ICC
—
6.9
13
mA
Input clamp voltage
VIK
—
—
–1.5
V
Notes: * VCC = 5 V, Ta = 25°C
** ICC is measured with all outputs open and all inputs grounded.
(Ta = –20 to +75 °C)
Condition
VCC = 4.75 V, VIH = 2 V, VIL = 0.8 V,
IOH = –400 µA
IOL = 4 mA V_CC = 4.75 V, V_IH = 2 V,
IOL = 8 mA ^VIL ^{= 0.8 V}
VCC = 5.25 V, VI = 2.7 V
VCC = 5.25 V, VI = 0.4 V
VCC = 5.25 V, VI = 7 V
VCC = 5.25 V
VCC = 5.25 V
VCC = 4.75 V, IIN = –18 mA
Rev.3.00, Jul.22.2005, page 2 of 4