Datasheet VS3V253QX, VS3V253Q, VS3V2253QX, VS3V2253Q Datasheet (Vaishali Semiconductor)

Advance Information

VS3V253 / VS3V2253

High-speed 3.3V CMOS VSwitch

Dual 4:1 Mux/Demux

Applications

•= 3.3V to 2.5V translation

•= 2.5V to 1.8V translation

•= Hot-Swapping

General Description

The VS3V253 is a high-speed LVTTL–compatible dual 4:1 multiplexer/demultiplexer. The VS3V2253
contains two mux/dem ux channels with com mon path control ( S0 & S1) and individual active LOW enables

and /EB. The low ON res istance of VS3V253 allows inputs to be connected to outputs without adding

/E

A

propagation delay and without generating additional signal noise. The VS3V2253 has 25Ω resistors i n 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 ‘disabled’ state. This feature, combined with near-zero propagation
delay in the ‘on’ state, makes VS3V253 and VS3V2253 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 (VS3V253) and 25Ω (VS3V2253)

•= Pin-compatible with 74LVC253 or
equivalent logic devices

•= Zero added ground bounce or signal noise

•= Logic replacement

•= Memory bank, video, and audio

switching

•= 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

S0
S1

/E

A

/E

B

I0

A

I1

Y

A

Y

B

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A

I2

A

I3

A

I0

B

I1

B

I2

B

I3

B

/E

I2
I1

GND

QSOP

1

A

S1

2

I3

3

A

4

A

5

A

I0

6

A

Y

7

A

8

(All Pins Top View)

16
15
14
13
12

11

10

9

V

CC

/E

B

S0
I3

B

I2

B

I1

B

I0

B

Y

B

VS3V253/VS3V2253 Advance Information
Table 1. Pin Description

Name I/O Description

IXA, IXB I/O Data Input or Output
S0, S1 I Select Input
/EA, /EB I Enable Input
YA - YB I/O Data Output or Input

Table 2. Function Table

Inputs Select Outputs Function

/EA /EB S1 S0 YA Y

H X X X Hi-Z X Disable A
X H X X X Hi-Z Disable B
L L L L I0A I0B S1-0 = 0
L L L H I1A I1B S1-0 = 1
L L H L I2A I2B S1-0 = 2
L L H H I3A I3B S1-0 = 3

B

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 conditi ons beyond those indicated may adversely affect devic e reliabilit y. Correct functional operation
while operating in the absolute maximum rated conditions is not implied.

Table 4. Capacitance

TA = 25oC, f = 1 MHz, VIN = 0V, V

OUT

= 0V

QSOP

Pins Operation Typ Max Unit

Control Inputs 4 5 pF
VSwitch Channels Demux 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 i s closed, is the sum of the

switch terminal capac i tances.

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VS3V253/VS3V2253 Advance Information
Table 5. Recommended Operating Conditions

Symbol Parameter Conditions Min Typ Max Units

VCC Power supply voltage 2.3 3.6 V
VIL Low level input voltage

(Control inputs)

VIH High level input voltage

(Control inputs)

TA Operating free-air temperature -40 85

Note: All unused control i nputs of the device must be held at Vcc or GND, to ensure proper devi ce operation

Vcc = 2.3 to 2.7
Vcc =2.7 to 3.6
Vcc = 2.3 to 2.7
Vcc = 2.7 to 3.6

0.7

V

0.8

1.7

V

2.0

o

C

Table 6. Electrical Characteristics Over Recommended Operating Free-air Temperature Range

Symbol Parameter Test Conditions Min Typ Max Units

VOH Logic High Voltage

I

I

| Power OFF Leakage

OFF

Input Leakage Current Control Inputs VCC = Max, VI = VCC or GND 1

Current

|IOZ| OFF State Leakage

Current

Switch I/O Drive

ODL

Current (Logic LOW)

Switch I/O Drive

ODH

Current (Logic HIGH)

RON Switch ON

Resistance

(1)

Control Inputs -1.5 VIK Clamp Voltage
Switch I/O
Switch I/O

Control Inputs |
Switch I/O
Switch I/O VCC = Max, V

VCC = 3.0V, VIN = 0,

= 0.7V

V

OUT

VCC = 3.0V, VIN = VCC,

= 1.8V

V

OUT

VCC = 3.0V, VIN = 0,

= 15mA

I

OUT

V

= 2.3V, V

CC

= 8mA

I

OUT

VCC = Min, IIK = -18 mA

= VCC = 3.3V, I

V

IN

= VCC = 2.5V, I

V

IN

V

= 0, VI or VO = VCC or GND 1

CC

I/O

= /EB = VCC

/E

A

OUT

OUT

= VCC,

= -100µA
= -100µA

-1.5

2.3

1.5

1

VS3V253 50 mA I
VS3V2253 30 mA
VS3V253 -50 mA I
VS3V2253 -20 mA
VS3V253 5
VS3V2253 20 28

= 0V,

IN

VS3V253 10
VS3V2253 23 35

V

2.7

V

2.0

µA
µA

µA

(2)

7

(2)

40

(3)

14

(3)

48

Ω
Ω
Ω
Ω

Notes:

1. RON is measured by forcing specified current into the ‘output’ node of the switch with the ‘input’ node of the switch
at the specified voltage.

2. Typical value is specified at V

3. Typical value is specified at V

= 3.3V and TA = 25oC.

CC

= 2.5V and TA = 25

CC

o

Table 7. Power Supply Characteristics Over Recommended Operating Free-air Temperature Range

(1)

Symbol Parameter Test Conditions

I

Quiescent Power Supply Current VCC = 3.6V, SX, /EX = VCC or GND, f = 0 1

CCQ

∆ICC

Q

Dynamic Power Supply Current

CCD

Power Supply Current per Input High

(2)

(Control Inputs)

(3)

VCC = Max, Switch pins open,

= 3.6V, VIN = 3.0V, f = 0

V

CC

= 2.7V, VIN = 2.0V, f = 0

V

CC

Max Units

µA

300

0.15 mA/MHz

µA

Control Inputs toggling at 50% duty cycle

Notes:

1. For conditions shown as Min or Max, use the appropriate values per Recommended Operating Conditions.

2. Per control input. All other control inputs at GND. Switch I/O pins do not contribute to ∆ICC.

3. This parameter represents the average DC current resulting from the switching of internal nodes of the device at a
given frequency. The switch I/O pins make insignificant contribution to the dynamic power supply current of the
device. This parameter is guaranteed, but not production tested.

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V

A

VOUT

(V)

2

1

4

3

VS3V253/VS3V2253 Advance Information

VOLTAGE TRANSLATION

3

Vcc=3.6V

Vcc=3.5V

Vcc=3.3V

Vcc=3.3V

VOUT

(V)

2

1

Vcc=2.7V
Vcc=2.5V
Vcc=2.3V

Vcc=3.0V

Vcc=3.0V

VOH

(V)

1 2 4 0

V

3

IN (V)

Figure 3. 3.3V to 2.5V Translation

(TA + 25 °C)

3.0

2.0

1.0

OH CHAR

Figure 4. 2.5V to 1.8V Translation

CTERISTICS

3.0

2.0

VOH

(V)

1.0

1

2

IN (V)

V

(TA + 25 °C)

3

0

2.9 3.1 3.3 3.6 3.7 3.0 3.2 3.4 3.5

Supply Voltage – VCC (V)

(T

+ 25 °C)

A

Figure 5. VOH CHARACTERIS TICS
(Vcc = 3.3V nominal)

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0

2.2 2.3 2.4 2.5 2.8 2.7 2.6

Supply Voltage – VCC (V)

(T

+ 25 °C)

A

Figure 6. VOH CHARACTERIS TICS
(Vcc = 2.5V nominal)

VS3V253/VS3V2253 Advance Information

Table 8. Switching Characteristics Over Operating Range – 3.3V Supply Voltage

TA = -40oC to +85oC, VCC = 3.3V + 0.3V
C

= 30pF, R

LOAD

Symbol

t

, t

PLH

PHL

t

, t

PZH

PZL

t

, t

PZH

PZL

t

, t

PLZ

PHZ

Data Propagation Delay
Switch Turn-on Delay, S0 or S1 to YX, IXX 0.5 5.2 0.5 6.2 ns
Switch Turn-on Delay, /EA or /EB to YX, IXX 0.5 4.8 0.5 5.8 ns
Switch Turn-off Delay

= 500Ω unless otherwise stated.

LOAD

Description

(2,3)

through the switch 0.25 1.25 ns

(3)

, S

or /EX to YX, IXX 0.5 5.0 0.5 5.0 ns

X

(1)

VS3V253

(3)

Min

Max

VS3V2253

(3)

Min

Max Units

Table 9. Switching Characteristics Over Operating Range – 2.5V Supply Voltage

TA = -40oC to +85oC, VCC = 2.5V + 0.2V
C

= 30pF, R

LOAD

Symbol

t

, t

PLH

PHL

t

, t

PZH

PZL

t

, t

PZH

PZL

t

, t

PLZ

PHZ

Data Propagation Delay
Switch Turn-on Delay, S to YX, I0X, or IX ns
Switch Turn-on Delay, /E to YX, I0X, or IX ns
Switch Turn-off Delay

= 500Ω unless otherwise stated.

LOAD

Description

(2,3)

through the switch ns

(3)

, S or /E to Y

(1)

, I0X, or IX ns

X

VS3V253

(3)

Min

Max

VS3V2253

(3)

Min

Max Units

Notes:

1. See test circuits and waveforms.

2. This parameter is the calculated theoretical RC time constant of ON-state resistance of the switch and the
specified load capacitance when driven by an ideal voltage source (zero source impedance). This time-constant is
on the order of 0.25 ns for VS3V253 and 1.25 ns for VS3V2253. Since this time-constant is much smaller than
rise/fall times of typical driving signals, it adds very little propagation delay to the system.

3. This parameter is guaranteed, but not production tested.

Figure 7. AC Test Circuit and Switching Waveforms

AC Test Circuit 3.3V Supply Voltage Load Switch

S

500

450

1

5 V

Ω

R

L

Ω

50Ω=Coax to
Oscilloscope

TEST S1

t

, t

Open

PHL

, t

Closed

PZL

, t

Open

PZH

t
t

PLH

PLZ

PHZ

Input Conditions

Input voltage = 0 V to 3.0 V
t

= tf = 2.5ns (10% to 90%)

r

Pulse

Generator

V

IN

50

Ω

Switching Waveforms

DUT

C

V

L

OUT

Position

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VS3V253/VS3V2253 Advance Information

3.0 V

Input

tPLH tPHL

Switch Output

1.5 V
0 V

V

OH

1.2 V

V

OL

Propagation Delay

3.0 V

Control Input

tPHZ

tPZH

1.5 V
0 V

VOH

1.2 V
0 V

3.5 V

1.2 V
V

OL

Switch Output

(Switch Input = 3.0 V)

Switch Output

(Switch Input = 0 V)

0.3 V

tPLZ

0.3 V

Switch ON Switch OFF

tPZL

Switch ON

Enable and Disable Times

Ordering Information

Part Number Marking Shipping/Packaging No. of Pins Package Temperature

VS3V253Q VS3V253Q Tubes 16 QSOP
VS3V253QX VS3V253Q Tape & Reel 16 QSOP
VS3V2253Q VS3V2253Q Tubes 16 QSOP
VS3V2253QX VS3V2253Q Tape & Reel 16 QSOP

-40°C to +85°C

-40°C to +85°C

-40°C to +85°C

-40°C to +85°C

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