Datasheet

www.ti.com
1B11A
OE
1B2
SW
SW
2B12A
2B2
SW
SW
3B13A
3B2
SW
SW
4B14A
4B2
SW
SW
S
4
7
9
12
1
15
2
3
5
6
11
10
14
13
A
EN
(2)
B
Control
Circuit
V
G
(1)
(1) Gate voltage (V
G
) is equal to approximately V
CC
+ V
T
when the switch is ON
and V
I
> V
CC
+ V
T
.
(2) EN is the internal enable signal applied to the switch.
SN74CB3T3257
4-BIT 1-OF-2 FET MULTIPLEXER/DEMULTIPLEXER
2.5-V/3.3-V LOW-VOLTAGE BUS SWITCH WITH 5-V-TOLERANT LEVEL SHIFTER
SCDS149 – OCTOBER 2003 – REVISED MARCH 2005
LOGIC DIAGRAM (POSITIVE LOGIC)
SIMPLIFIED SCHEMATIC, EACH FET SWITCH (SW)
3