Datasheet
www.ti.com
Electrical Characteristics
Switching Characteristics
Switching Characteristics
SN54LVC257A, SN74LVC257A
QUADRUPLE 2-LINE TO 1-LINE DATA SELECTORS/MULTIPLEXERS
WITH 3-STATE OUTPUTS
SCAS294N – JANUARY 1993 – REVISED JUNE 2005
over recommended operating free-air temperature range (unless otherwise noted)
SN54LVC257A SN74LVC257A
PARAMETER TEST CONDITIONS V
CC
UNIT
MIN TYP
(1)
MAX MIN TYP
(1)
MAX
I
OH
= –100 µ A 1.65 V to 3.6 V V
CC
– 0.2
I
OH
= –100 µ A 2.7 V to 3.6 V V
CC
– 0.2
I
OH
= –4 mA 1.65 V 1.2
V
OH
I
OH
= –8 mA 2.3 V 1.7 V
2.7 V 2.2 2.2
I
OH
= –12 mA
3 V 2.4 2.4
I
OH
= –24 mA 3 V 2.2 2.2
1.65 V to 3.6 V 0.2
I
OL
= 100 µ A
2.7 V to 3.6 V 0.2
I
OL
= 4 mA 1.65 V 0.45
V
OL
V
I
OL
= 8 mA 2.3 V 0.7
I
OL
= 12 mA 2.7 V 0.4 0.4
I
OL
= 24 mA 3 V 0.55 0.55
I
I
V
I
= 5.5 V or GND 3.6 V ±5 ±5 µ A
I
OZ
V
O
= V
CC
or GND 3.6 V ±15 ±10 µ A
I
CC
V
I
= V
CC
or GND, I
O
= 0 3.6 V 10 10 µ A
One input at V
CC
– 0.6 V,
∆ I
CC
2.7 V to 3.6 V 500 500 µ A
Other inputs at V
CC
or GND
C
i
V
I
= V
CC
or GND 3.3 V 5 5 pF
C
o
V
O
= V
CC
or GND 3.3 V 5 5 pF
(1) All typical values are at V
CC
= 3.3 V, T
A
= 25°C.
over recommended operating free-air temperature range (unless otherwise noted) (see Figure 1 )
SN54LVC257A
FROM TO V
CC
= 3.3 V
PARAMETER V
CC
= 2.7 V UNIT
(INPUT) (OUTPUT) ± 0.3 V
MIN MAX MIN MAX
A or B 5.4 1 4.6
t
pd
Y ns
A/B 7.5 1 6.4
t
en
OE Y 6.7 1 5.6 ns
t
dis
OE Y 4.7 0.5 4.3 ns
t
sk(o)
1 ns
over recommended operating free-air temperature range (unless otherwise noted) (see Figure 1 )
SN74LVC257A
FROM TO V
CC
= 1.8 V V
CC
= 2.5 V V
CC
= 3.3 V
PARAMETER V
CC
= 2.7 V UNIT
(INPUT) (OUTPUT) ± 0.15 V ± 0.2 V ± 0.3 V
MIN MAX MIN MAX MIN MAX MIN MAX
A or B 1 13.5 1 7.4 1 5.4 1 4.6
t
pd
Y ns
A/B 1 15.6 1 9.5 1 7.5 1 6.4
t
en
OE Y 1 14.6 1 8.7 1 6.7 1 5.6 ns
t
dis
OE Y 1 15.4 1 6.7 1 4.7 1 4.3 ns
t
sk(o)
1 ns
4