HD74LS42 Datasheet, PDF (3/7 Pages) Hitachi Semiconductor – BCD-to-Decimal Decoder

HD74LS42
Recommended Operating Conditions
Item
Supply voltage
Output current
Operating temperature
Symbol
VCC
IOH
IOL
Topr
Min
4.75
—
—
–20
Typ
5.00
—
—
25
Max
5.25
–400
8
75
Unit
V
µA
mA
°C
Electrical Characteristics
Item
Input voltage
Symbol
VIH
VIL
min.
2.0
—
typ.*
—
—
max.
—
0.8
VOH
2.7
—
—
Output voltage
—
—
0.5
VOL
—
—
0.4
IIH
—
—
20
Input current
IIL
—
—
–0.4
II
—
—
0.1
Short-circuit output
current
IOS
–20
—
–100
Supply current
ICC**
—
7
13
Input clamp voltage
VIK
—
—
–1.5
Notes: * VCC = 5 V, Ta = 25°C
** VCC is measured with all outputs and all inputs grounded.
Unit
V
V
V
V
µA
mA
mA
mA
mA
V
(Ta = –20 to +75 °C)
Condition
VCC = 4.75 V, VIH = 2 V, VIL = 0.8 V,
IOH = –400 µA
IOL = 8 mA
IOL = 4 mA
VCC = 4.75 V, VIH = 2 V,
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
Switching Characteristics
(V_CC = 5 V, Ta = 25°C)
Item
Symbol min.
typ.
max.
Unit
Condition
2 Stage
—
15
25
tPLH
ns
3 Stage
—
20
30
Propagation delay time
2 Stage
—
15
25
CL = 15 pF, RL = 2 kΩ
tPHL
ns
3 Stage
—
20
30
Rev.3.00, Jul.22.2005, page 3 of 6