Advance Information
VS3V253 / VS3V2253
High-speed 3.3V CMOS VSwitch
Dual 4:1 Mux/Demux
Applications
鈥?
鈥?
鈥?
3.3V to 2.5V translation
2.5V to 1.8V translation
Hot-Swapping
鈥?
鈥?
Logic replacement
Memory bank, video, and audio
switching
General Description
The VS3V253 is a high-speed LVTTL鈥揷ompatible dual 4:1 multiplexer/demultiplexer. The VS3V2253
contains two mux/demux channels with common path control (S0 & S1) and individual active LOW enables
/E
A
and /E
B
. The low ON resistance of VS3V253 allows inputs to be connected to outputs without adding
propagation delay and without generating additional signal noise. The VS3V2253 has 25鈩?resistors in series
with the switches to reduce ground-bounce noise and signal reflections.
The VS3V253 and VS3V2253 mux/demux switches are designed for 3.3V to 2.5V, or 2.5V to 1.8V
translation, without any external components. These switches also offer very high impedance between
switch terminals in the power off or 鈥榙isabled鈥?state. This feature, combined with near-zero propagation
delay in the 鈥榦n鈥?state, makes VS3V253 and VS3V2253 ideal interface elements for hot-swapping
applications.
Features
鈥?
Enhanced N-FET with no DC path to V
CC
or GND in normal operating signal voltage
range.
Low impedance switches connect inputs to
outputs with near-zero propagation delay:
5鈩?(VS3V253) and 25鈩?(VS3V2253)
Pin-compatible with 74LVC253 or
equivalent logic devices
Zero added ground bounce or signal noise
鈥?
鈥?
鈥?
鈥?
鈥?
Break-before-make feature
Undershoot clamp diodes on all switch and
control pins
ESD rating >2000V (Human Body Model)
or >200V (Machine Model)
Latch-up current >100mA
Available in 150-mil wide QSOP package
鈥?
鈥?
鈥?
Figure 1. Functional Block Diagram
S0
S1
/E
A
/E
B
Figure 2. Pin Configuration
QSOP
/E
A
S1
I3
A
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
V
CC
/E
B
S0
I3
B
I2
B
I1
B
I0
B
Y
B
I0
A
Y
A
I1
A
I2
A
I3
A
I0
B
I1
B
I2
B
I3
B
I2
A
I1
A
I0
A
Y
A
GND
Y
B
(All Pins Top View)
2000-11-28
Vaishali Semiconductor
1300 White Oaks Road
Page 1
Campbell
CA 95008
Ph. 408.377.6060
MDSS-0003-01
Fax 408.377.6063
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