VS3V257 Datasheet, PDF (1/6 Pages) Vaishali Semiconductor – High-speed 3.3V CMOS VSwitch Quad 2:1 Mux/Demux

VS3V257 / VS3V2257
High-speed 3.3V CMOS VSwitch
Quad 2:1 Mux/Demux
Applications
•= 3.3V to 2.5V translation
•= 2.5V to 1.8V translation
•= Hot-Swapping
•= Logic replacement
•= Memory bank, video, and audio
switching
General Description
The VS3V257 is a high-speed LVTTL–compatible Quad 2:1 multiplexer/demultiplexer. The VS3V257
contains four mux/demux channels, with a common path control (S) and active low enable (/E). The low ON
resistance of the VS3V257 allows inputs to be connected to outputs, without adding propagation delay and
without generating additional signal noise. The VS3V2257 has 25Ω resistors in series with the switches to
reduce ground-bounce noise and signal reflection.
The VS3V257 and VS3V2257 are designed for 3.3V to 2.5V or 2.5V to 1.8V level translation, without any
external components. These switches also offer very high impedance between switch terminals in the
power-off or “disabled” state. This feature, combined with near-zero propagation delay in the “on” state,
makes VS3V257 and VS3V2257 ideal interface elements for hot-swapping applications.
Features
•= Enhanced N-FET with no DC path to VCC
or GND in normal operating signal voltage
range.
•= Low impedance switches connect inputs to
outputs with near-zero propagation delay:
5Ω (VS3V257) and 25Ω (VS3V2257)
•= Pin-compatible with 74LVC257 or
equivalent logic devices
•= Zero added ground bounce or signal noise
•= 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
Figure 1. Functional Block Diagram
Figure 2. Pin Configuration
S
/E
Y_A
Y_B
Y_C
Y_D
QSOP
I0_A
I1_A
I0_B
I1_B
I0_C
I1_C
I0_D
I1_D
S1
I0A 2
I1A 3
YA 4
I0B ₅
I1B ₆
YB ₇
GND ⁸
16 V_CC
15 _/E
14 I0_D
13 I1_D
12 Y_D
11 _I0C
10 _I1C
9 _YC
(All Pins Top View)
2000-11-28
Page 1
MDSS-0001-01
www.vaishali.com
Vaishali Semiconductor 747 Camden Avenue, Suite C Campbell CA 95008 Ph. 408.377.6060 Fax [phone]