HD74LS257 Datasheet, PDF (3/6 Pages) Hitachi Semiconductor – Quadruple 2-line-to-1-line Data Selectors/Multiplexers(with non inverted 3-state outputs)

HD74LS257
Electrical Characteristics
(Ta = –20 to +75 °C)
Item
Symbol min. typ.* max. Unit
Condition
Input voltage
Output voltage
S
S except
V_IH
2.0
—
—
V
V_IL
—
—
0.8
V
V_OH
2.4
—
—
V
V_CC = 4.75 V, V_IH = 2 V, V_IL = 0.8 V,
I_OH = –2.6 mA
V_OL
—
—
0.5
V
I_OL = 8 mA V_CC = 4.75 V, V_IH = 2 V,
—
—
0.4
I_OL = 4 mA ^VIL ^{= 0.8 V}
—
—
40
I_IH
—
—
20
µA V_CC = 5.25 V, V_I = 2.7 V
Input
current
S
S except
—
—
–0.8
I_IL
—
—
–0.4
mA V_CC = 5.25 V, V_I = 0.4 V
S
S except
—
—
0.2
I_I
—
—
0.1
mA V_CC = 5.25 V, V_I = 7 V
Output current
I_OZ
Short-circuit output current
I_OS
All outputs high
Supply
current** ^{All outputs low}
I_CC
All outputs off
—
—
—
—
20
–20
µA
V_O = 2.4 V
V_O = 0.4 V
V_CC = 5.25 V, V_IH = 2 V
–30
—
–130
mA V_CC = 5.25 V
—
5.9
10
—
9.2
16
mA V_CC = 5.25 V
—
10
19
Input clamp voltage
V_IK
—
—
–1.5
V
V_CC = 4.75 V, I_IN = –18 mA
Notes: * V_CC = 5 V, Ta = 25°C
** I_CC is measured with all outputs open and all possible inputs grounded while achieving the stated output
conditions.
Switching Characteristics
(V_CC = 5 V, Ta = 25°C)
Item
Symbol Inputs Output
min.
typ.
max.
Unit
Condition
t_PLH
A, B
Y
Propagation delay time
t_PHL
t_PLH
S
Y
t_PHL
—
12
18
ns
—
12
18
—
—
14
14
21
21
ns
C_L = 15 pF,
R_L = 2 kΩ
Output enable time
t_ZH
OC
Y
t_ZL
—
20
30
ns
—
20
30
Output disable time
t_HZ
OC
Y
t_LZ
—
—
18
16
30
25
ns
C_L = 5 pF,
R_L = 2 kΩ
Rev.3.00, Jul.15.2005, page 3 of 5