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Vaishali Semiconductor
Vaishali Semiconductor

VS3V257 Datasheet Preview

VS3V257 Datasheet

High-speed 3.3V CMOS VSwitch Quad 2:1 Mux/Demux

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VS3V257 pdf
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 25resistors 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:
5(VS3V257) and 25(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
YA
YB
YC
YD
QSOP
I0A
I1A
I0B
I1B
I0C
I1C
I0D
I1D
S
I0A
I1A
YA
I0B
I1B
YB
GND
1
2
3
4
5
6
7
8
16 VCC
15 /E
14 I0D
13 I1D
12 YD
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 408.377.6063



Vaishali Semiconductor
Vaishali Semiconductor

VS3V257 Datasheet Preview

VS3V257 Datasheet

High-speed 3.3V CMOS VSwitch Quad 2:1 Mux/Demux

No Preview Available !

VS3V257 pdf
VS3V257/VS3V2257
Table 1. Pin Description
Name
I/O
Description
I0X, I1X
I/O
Data Input or Output
S I Select Input
/E I Enable Input
YA - YD
I/O
Data Output or Input
Table 2. Function Table
Inputs
Path
/E S
H X Hi Impedance
L L IOX <-> YX
L H I1X <-> YX
Function
Disable all switches
Select 0
Select 1
Table 3. Absolute Maximum Ratings
Supply Voltage to Ground………………………….…..-0.5V to +4.6V
DC Switch Voltage VS……………………….………….-0.5V to +4.6V
DC Input Voltage VIN…………………………………...-0.5V to +4.6V
AC Input Voltage (Pulse Width < 20ns)……………….…………-3.0V
DC Output Sink Current per Switch Pin…………………...…..128 mA
Maximum Power Dissipation…………………………….…..0.5 Watts
Storage Temperature………………………………...-65oC to +150oC
Note ABSOLUTE MAXIMUM CONTINUOUS RATINGS are those values beyond which damage to the device may occur. Exposure
to these conditions or conditions beyond those indicated may adversely affect device reliability. Correct functional operation
while operating in the absolute maximum rated conditions is not implied.
Table 4. Capacitance
TA = 25oC, f = 1 MHz, VIN = 0V, VOUT = 0V
QSOP
Pins
Operation Typ Max
Unit
Control Inputs
VSwitch Channels
Demux
4 5 pF
5 7 pF
(Switch OFF)
Mux
7 8 pF
Note Capacitance is guaranteed, but not production tested. Total capacitance of a path, when the switch is closed, is the sum of the
switch terminal capacitances.
Table 5. Recommended Operating Conditions
Symbol
VCC
VIL
Parameter
Power supply voltage
Low level input voltage
(Control inputs)
VIH High level input voltage
(Control inputs)
Conditions
Vcc = 2.3 to 2.7
Vcc =2.7 to 3.6
Vcc = 2.3 to 2.7
Vcc = 2.7 to 3.6
Min Typ Max Units
2.3 3.6 V
V
0.7
0.8
1.7 V
2.0
TA Operating free-air temperature
-40 85 oC
Note: All unused control inputs of the device must be held at Vcc or GND, to ensure proper device operation
2000-11-28
Page 2
MDSS-0001-01
www.vaishali.com
Vaishali Semiconductor 747 Camden Avenue, Suite C Campbell CA 95008 Ph. 408.377.6060 Fax 408.377.6063


Part Number VS3V257
Description High-speed 3.3V CMOS VSwitch Quad 2:1 Mux/Demux
Maker Vaishali Semiconductor
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