HD74LS248 Datasheet, PDF (4/7 Pages) Hitachi Semiconductor – BCD-to-Seven-Segment Decoders/Drivers(internal pull-up outputs)

HD74LS248
Recommended Operating Conditions
Item
Symbol
Min
Typ
Max
Unit
Supply voltage
Operating temperature
V_CC
4.75
5.00
5.25
V
Topr
–20
25
75
°C
a to g
—
—
–100
µA
I_OH
BI/RBO
—
—
–50
µA
Output current
a to g
—
—
6
mA
I_OL
BI/RBO
—
—
3.2
mA
a
f gb
e
c
d 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
Electrical Characteristics
Item
Symbol min. typ.* max. Unit
Input voltage
V_IH
2.0
—
—
V
V_IL
—
—
0.8
V
Output
voltage
a to g
BI/RBO
V_OH
2.4
—
—
V
Output
current**
a to g
I_O
–1.3
—
—
mA
Output
voltage
—
—
0.4
a to g
—
—
0.5
V_OL
—
—
0.4
V
BI/RBO
—
—
0.5
Except
BI/RBO
I_IH
—
—
20
µA
Except
Input current BI/RBO
I_IL
BI/RBI
—
—
–0.4
mA
—
—
–1.2
Except
BI/RBO
I_I
—
—
0.1
mA
Short-circuit
BI/RBO
output current
I_OS
–0.3
—
–2
mA
Supply current***
I_CC
—
25
38
mA
Input clamp voltage
V_IK
—
—
–1.5
V
Notes: * V_CC = 5 V, Ta = 25°C
** Input condition as for V_OH.
*** I_CC is measured with all outputs open and all inputs at 4.5 V.
(Ta = –20 to +75 °C)
Condition
I_OH = –100 µA V_CC = 4.75 V, V_IH = 2 V,
I_OH = –50 µA ^VIL ^{= 0.8 V}
V_CC = 4.75 V, V_O = 0.85 V
I_OL = 2 mA
I_OL = 6 mA
I_OL = 1.6 mA
I_OL = 3.2 mA
V_CC = 4.75 V, V_IH = 2 V,
V_IL = 0.8 V
V_CC = 5.25 V, V_I = 2.7 V
V_CC = 5.25 V, V_I = 0.4 V
V_CC = 5.25 V, V_I = 7 V
V_CC = 5.25 V
V_CC = 5.25 V
V_CC = 4.75 V, I_IN = –18 mA
Switching Characteristics
Item
Propagation delay time
(V_CC = 5 V, Ta = 25°C)
Symbol Input
min.
typ.
max.
Unit
Condition
t_PLH
t_PHL
—
—
100
A
—
—
100
ns C_L = 15 pF, R_L = 4 kΩ
t_PLH
t_PHL
—
—
100
RBI
—
—
100
ns C_L = 15 pF, R_L = 6 kΩ
Rev.3.00, Jul.15.2005, page 4 of 6