QS3VH251QG [IDT]

HIGH BANDWIDTH BUS SWITCH;


型号：	QS3VH251QG
厂家：	INTEGRATED DEVICE TECHNOLOGY
描述：	HIGH BANDWIDTH BUS SWITCH PC 光电二极管逻辑集成电路
文件：	总8页 (文件大小：277K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

IDTQS3VH251

INDUSTRIAL TEMPERATURE RANGE

2.5V / 3.3V QUAD 8:1 MUX/DEMUX HIGH BANDWIDTH BUS SWITCH

QUICKSWITCH^®PRODUCTS

IDTQS3VH251

2.5V / 3.3V 8:1 MUX / DEMUX

HIGH BANDWIDTH BUS SWITCH

FEATURES:

DESCRIPTION:

• N channel FET switches with no parasitic diode to VCC

– Isolation under power-off conditions

– No DC path to VCC or GND

The QS3VH251 HotSwitch Quad 2:1 multiplexer/demultiplexer is a high

bandwidth bus switch. The QS3VH251 has very low ON resistance,

resulting in under 250ps propagation delay through the switch. The Select

(Sx) input controls the data flow. The multiplexers/demultiplexers are

enabled when the Enable (E) input is low. In the ON state, the switches can

pass signals up to 5V. In the OFF state, the switches offer very high

impedence at the terminals.

– 5V tolerant in OFF and ON state

• 5V tolerant I/Os

• Low RON - 4Ω typical

• Flat R^ONcharacteristics over operating range

• Rail-to-rail switching 0 - 5V

The combination of near-zero propagation delay, high OFF impedance,

and over-voltage tolerance makes the QS3VH251 ideal for high perfor-

mance comminucation applications.

• Bidirectional dataflow with near-zero delay: no added ground

bounce

• Excellent R^ONmatching between channels

• VCC operation: 2.3V to 3.6V

The QS3VH251 is characterized for operation from -40°C to +85°C.

• High bandwidth - up to 500MHz

• LVTTL-compatible control Inputs

• Undershoot Clamp Diodes on all switch and control Inputs

• Low Demux capacitance, 4pF typical

• Available in QSOP and TSSOP packages

APPLICATIONS:

• Hot-swapping

• Multiplexing/demultiplexing

• Low distortion analog switch

• Replaces mechanical relay

• ATM 25/155 switching

FUNCTIONAL BLOCK DIAGRAM

The IDT logo is a registered trademark of Integrated Device Technology, Inc.

INDUSTRIAL TEMPERATURE RANGE

FEBRUARY 2014

2014 Integrated Device Technology, Inc.

DSC-5944/11

IDTQS3VH251

INDUSTRIAL TEMPERATURE RANGE

2.5V / 3.3V QUAD 8:1 MUX/DEMUX HIGH BANDWIDTH BUS SWITCH

ABSOLUTE MAXIMUM RATINGS⁽¹⁾

PIN CONFIGURATION

Symbol

Description

Max

–0.5 to +4.6

–0.5 to +5.5

–3

Unit

(2)

VTERM

SupplyVoltage to Ground

DC Switch Voltage VS

(3)

VTERM

(3)

VTERM

DC Input Voltage VIN

VCC

VAC

IOUT

AC Input Voltage (pulse width ≤20ns)

DC Output Current (max. sink current/pin)

Storage Temperature

120

°C

I²

TSTG

–65 to +150

NOTES:

1. Stresses greater than those listed under ABSOLUTE MAXIMUM RATINGS may cause

permanent damage to the device. This is a stress rating only and functional operation of

the device at these or any other conditions above those indicated in the operational

sections of this specification is not implied. Exposure to absolute maximum rating

conditions for extended periods may affect reliability.

2. V^CCterminals.

3. All terminals except V^CC.

S²

GND

CAPACITANCE (TA = +25°C, F = 1MHz, VIN = 0V, VOUT =

Symbol

Parameter⁽¹⁾

Typ.

Max. Unit

0V)

CIN

Control Inputs

CI/O

Quickswitch Channels Demux

(Switch OFF)

Quickswitch Channels Demux

(Switch ON) Mux

Mux

QSOP/ TSSOP

TOP VIEW

CI/O

NOTE:

1. This parameter is guaranteed but not production tested.

FUNCTION TABLE⁽¹⁾

Select

PIN DESCRIPTION

Function

Pin Names

I/O

Description

Data Inputs

Disable

I0 - I7

S0 - S2

S2 - S0 = 0

S2 - S0 = 1

S2 - S0 = 2

S2 - S0 = 3

S2 - S0 = 4

S2 - S0 = 5

S2 - S0 = 6

S2 - S0 = 7

Select Input

Enable Input

Data Outputs

NOTE:

1. H = HIGH Voltage Level

L = LOW Voltage Level

X = Don't Care

Z = High-Impedence

IDTQS3VH251

INDUSTRIAL TEMPERATURE RANGE

2.5V / 3.3V QUAD 8:1 MUX/DEMUX HIGH BANDWIDTH BUS SWITCH

DC ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE

Following Conditions Apply Unless Otherwise Specified:

Industrial: TA = –40°C to +85°C, VCC = 3.3V ±0.3V

Symbol

Parameter

Input HIGH Voltage

Test Conditions

Min.

1.7

Typ.⁽¹⁾Max.

Unit

VIH

Guaranteed Logic HIGH

VCC = 2.3V to 2.7V

VCC = 2.7V to 3.6V

VCC = 2.3V to 2.7V

VCC = 2.7V to 3.6V

—

0.7

0.8

±1

for Control Inputs

Guaranteed Logic LOW

for Control Inputs

0V ≤ VIN ≤ VCC

VIL

Input LOW Voltage

—

IIN

IOZ

Input Leakage Current (Control Inputs)

Off-State Current (Hi-Z)

μA

0V ≤ VOUT ≤ 5V, Switches OFF

VIN or VOUT 0V to 5V, VCC = 0V

VCC = 2.3V

IOFF

Data Input/Output Power Off Leakage

VIN = 0V

ION = 30mA

ION = 15mA

ION = 30mA

ION = 15mA

RON

Switch ON Resistance

Typical at VCC = 2.5V

VCC = 3V

VIN = 1.7V

VIN = 0V

VIN = 2.4V

NOTE:

1. Typical values are at VCC = 3.3V and TA = 25°C.

TYPICAL ON RESISTANCE vs V AT V

= 3.3V

RON

(ohms)

1.5

2.0

2.5

3.0

3.5

4.0

4.5

5.0

1.0

0.0

0.5

VIN

(Volts)

IDTQS3VH251

INDUSTRIAL TEMPERATURE RANGE

2.5V / 3.3V QUAD 8:1 MUX/DEMUX HIGH BANDWIDTH BUS SWITCH

POWER SUPPLY CHARACTERISTICS

Symbol

ICCQ

Parameter

Test Conditions⁽¹⁾

Min.

—

Typ.

Max.

Unit

μA

Quiescent Power Supply Current

Power Supply Current ^(2,3)per Input HIGH

Dynamic Power Supply Current⁽⁴⁾

VCC = Max., VIN = GND or VCC, f = 0

VCC = Max., VIN = 3V, f = 0 per Control Input

ΔICC

—

ICCD

VCC = 3.3V, A and B Pins Open, Control Inputs See Typical ICCD vs Enable Frequency graph below

Toggling @ 50% Duty Cycle

NOTES:

1. For conditions shown as Min. or Max., use the appropriate values specified under DC Electrical Characteristics.

2. Per input driven at the specified level. Mux/demux pins do not contribute to ΔIcc.

3. This parameter is guaranteed but not tested.

4. This parameter represents the current required to switch internal capacitance at the specified frequency. The mux/demux inputs do not contribute to the Dynamic Power Supply Current.

This parameter is guaranteed but not production tested.

CCD

TYPICAL I

vs ENABLE FREQUENCY CURVE AT V

= 3.3V

ENABLE FREQUENCY (MHz)

IDTQS3VH251

INDUSTRIAL TEMPERATURE RANGE

2.5V / 3.3V QUAD 8:1 MUX/DEMUX HIGH BANDWIDTH BUS SWITCH

SWITCHING CHARACTERISTICS OVER OPERATING RANGE

TA = -40°C to +85°C

VCC = 2.5 ± 0.2V ⁽¹⁾

VCC = 3.3 ± 0.3V ⁽¹⁾

(4)

Symbol

tPLH

tPHL

Parameter

Min.

Max.

Min.

Max.

Unit

Data Propagation Delay^(2,3)

Y to Ix or Ix to Y

Select Time

Sx to Y

Enable Time

S to Ix

Disable Time

S to Ix

Enable Time

E to Y or Ix

⎯

1.5

⎯

0.2

⎯

0.2

tSEL

1.5

tPZH

tPZL

tPHZ

tPLZ

tPZH

tPZL

tPHZ

tPLZ

Disable Time

E to Y or Ix

Operating Frequency - Enable^(2,5)

fEorSx

⎯

MHz

NOTES:

1. See Test Conditions under TEST CIRCUITS AND WAVEFORMS.

2. This parameter is guaranteed but not production tested.

3. The bus switch contributes no propagation delay other than the RC delay of the ON resistance of the switch and the load capacitance. The time constant for the switch alone is of the

order of 0.2ns at C^L= 50pF. Since this time constant is much smaller than the rise and fall times of typical driving signals, it adds very little propagation delay to the system. Propagation

delay of the bus switch, when used in a system, is determined by the driving circuit on the driving side of the switch and its interaction with the load on the driven side.

4. Minimums are guaranteed but not production tested.

5. Maximum toggle frequency for Sx or E control input (pass voltage > VCC, VIN = 5V, RLOAD ≥ 1MΩ, no CLOAD).

IDTQS3VH251

INDUSTRIAL TEMPERATURE RANGE

2.5V / 3.3V QUAD 8:1 MUX/DEMUX HIGH BANDWIDTH BUS SWITCH

SOME APPLICATIONS FOR HOTSWITCH PRODUCTS

NFET

0 to +5V

+6.5V

Vcc = 3.3V

CHARGE PUMP

DRIVER

SINGLE HOT

SWITCH

Rail-to-Rail Switching

MULTIPLEXING

CONTROL CIRCUITRY

MEMORY

CPU

8 BANKS

MEMORY

Multiplexing/Demultiplexing

ZERO DOWN TIME SYSTEM

PLUGGABLE CARD/ LIVE SYSTEM

ON CARD

LOGIC

CARD I/O

CPU

ON CARD

LOGIC

CARD I/O

RAM

BUS

Hot-Swapping

IDTQS3VH251

INDUSTRIAL TEMPERATURE RANGE

2.5V / 3.3V QUAD 8:1 MUX/DEMUX HIGH BANDWIDTH BUS SWITCH

TEST CIRCUITS AND WAVEFORMS

TEST CONDITIONS

VIH

SAME PHASE

INPUT TRANSITION

Symbol

VLOAD

VIH

VCC⁽¹⁾= 3.3V ± 0.3V

VCC⁽²⁾= 2.5V ± 0.2V

Unit

tPHL

tPLH

2 x Vcc

Vcc

VOH

VOL

OUTPUT

1.5

300

VCC/2

150

VIH

OPPOSITE PHASE

INPUT TRANSITION

VLZ

VHZ

150

Propagation Delay

VLOAD

Open

GND

VCC

DISABLE

ENABLE

VIH

CONTROL

INPUT

500Ω

tPZL

tPLZ

VIN

VOUT

(1, 2)

Pulse

VLOAD/2

D.U.T.

VLOAD/2

V^{OL +}VLZ

VOL

OUTPUT

NORMALLY

LOW

Generator

SWITCH

CLOSED

500Ω

tPHZ

tPZH

VOH

VOH -VHZ

OUTPUT

NORMALLY

HIGH

SWITCH

OPEN

Test Circuits for All Outputs

NOTE:

1. Diagram shown for input Control Enable-LOW and input Control Disable-HIGH.

Enable and Disable Times

DEFINITIONS:

CL = Load capacitance: includes jig and probe capacitance.

RT = Termination resistance: should be equal to ZOUT of the Pulse Generator.

NOTES:

1. Pulse Generator for All Pulses: Rate ≤ 10MHz; tF ≤ 2.5ns; tR ≤ 2.5ns.

2. Pulse Generator for All Pulses: Rate ≤ 10MHz; tF ≤ 2ns; tR ≤ 2ns.

SWITCH POSITION

Test

tPLZ/tPZL

tPHZ/tPZH

tPD

Switch

VLOAD

GND

Open

IDTQS3VH251

INDUSTRIAL TEMPERATURE RANGE

2.5V / 3.3V QUAD 8:1 MUX/DEMUX HIGH BANDWIDTH BUS SWITCH

ORDERING INFORMATION

XXXXX

Package

Device Type

Blank

Tube or Tray

Tape and Reel

PAG

QSOP - Green

TSSOP - Green

3VH251

2.5V / 3.3V 8:1 Mux/Demux

High Bandwidth Bus Switch

Datasheet Document History

09/01/08

Pg. 4, 8

Revise ICCQ Typ. and Max. Remove non green package version and updated the ordering

informationbyremovingthe“IDT”notation.

02/24/14

Pg. 8

UpdatedtheOrderingInformationbyAddingTapeandReelinformation.

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San Jose, CA 95138

for SALES:

for Tech Support:

logichelp@idt.com

800-345-7015 or 408-284-8200

fax: 408-284-2775

www.idt.com

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