IDTQS3VH384PAG - Integrated Device Technology, Inc.

INDUSTRIAL TEMPERATURE RANGE

IDTQS3VH384

2.5V / 3.3V 10-BIT HIGH BANDWIDTH BUS SWITCH

AUGUST 2002

2002 Integrated Device Technology, Inc. DSC-5895/9c

INDUSTRIAL TEMPERATURE RANGE

FUNCTIONAL BLOCK DIAGRAM

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

APPLICATIONS:

• Hot-swapping

• 10/100 Base-T, Ethernet LAN switch

• Low distortion analog switch

• Replaces mechanical relay

• ATM 25/155 switching

FEATURES:

• N channel FET switches with no parasitic diode to VCC

– Isolation under power-off conditions

– No DC path to VCC or GND

– 5V tolerant in OFF and ON state

• 5V tolerant I/Os

• Low RON - 4ΩΩ

ΩΩ

Ω typical

• Flat RON characteristics over operating range

• Rail-to-rail switching 0 - 5V

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

bounce

• Excellent RON matching between channels

•VCC operation: 2.3V to 3.6V

• High bandwidth - up to 500MHz

• LVTTL-compatible control Inputs

• Undershoot Clamp Diodes on all switch and control Inputs

• Low I/O capacitance, 4pF typical

• Available in QSOP and TSSOP packages

IDTQS3VH384

QUICKSWITCH® PRODUCTS

2.5V / 3.3V 10-BIT HIGH

BANDWIDTH BUS SWITCH

DESCRIPTION:

The QS3VH384 HotSwitch is a high bandwidth, 10-bit bus switch. The

QS3VH384 has very low ON resistance, resulting in under 250ps propagation

delay through the switch. Two banks of five switches are controlled by

independent (xOE), LVTTL compatible signals for bidirectional data flow with

no added delay or ground bounce. In the ON state, the switch can pass signals

up to 5V. In the OFF state, the switches offer very high impedence at the

terminals.

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

over-voltage tolerance makes the QS3VH384 ideal for high performance

communications applications.

The QS3VH384 is characterized for operation from -40°C to +85°C.

2OE

1OE

INDUSTRIAL TEMPERATURE RANGE

IDTQS3VH384

2.5V / 3.3V 10-BIT HIGH BANDWIDTH BUS SWITCH

PIN CONFIGURATION

QSOP/ TSSOP

TOP VIEW

Symbol Description Max Unit

VTERM(2) SupplyVoltage to Ground –0.5 to +4.6 V

VTERM(3) DC Switch Voltage VS–0.5 to +5.5 V

VTERM(3) DC Input Voltage VIN –0.5 to +5.5 V

VAC AC Input Voltage (pulse width ≤20ns) –3 V

IOUT DC Output Current (max. sink current/pin) 120 mA

TSTG Storage Temperature –65 to +150 °C

ABSOLUTE MAXIMUM RATINGS(1)

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. VCC terminals.

3. All terminals except VCC .

Symbol Parameter(1) Typ. Max. Unit

CIN Control Inputs 3 5 pF

CI/O Quickswitch Channels (Switch OFF) 4 6 pF

CI/O Quickswitch Channels (Switch ON) 8 12 pF

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

NOTE:

1. This parameter is guaranteed but not production tested.

Pin Names I/ O Description

A0 - A9I /O Bus A

B0 - B9I /O Bus B

1OE, 2OE I Output Enable

PIN DESCRIPTION

NOTE:

1 . H = HIGH Voltage Level

L = LOW Voltage Level

Z = High-Impedence

1OE 2OE B0 - B4B5 - B9Function

H H Z Z Disconnect

LHA0 - A4Z Connect

HL ZA5 - A9Connect

LLA

0 - A4A5 - A9Connect

FUNCTION TABLE(1)

1OE

GND

VCC

2OE

INDUSTRIAL TEMPERATURE RANGE

IDTQS3VH384

2.5V / 3.3V 10-BIT HIGH BANDWIDTH BUS SWITCH

TYPICAL ON RESIST ANCE vs VIN AT VCC = 3.3V

RON

(ohms)

VIN

(Volts)

0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 5.04.5

Symbol Parameter Test Conditions Min. Typ.(1) Max. Unit

VIH Input HIGH Voltage Guaranteed Logic HIGH VCC = 2.3V to 2.7V 1 . 7 — — V

for Control Inputs VCC = 2.7V to 3.6V 2 — —

VIL Input LOW Voltage Guaranteed Logic LOW VCC = 2.3V to 2.7V — — 0 . 7 V

for Control Inputs VCC = 2.7V to 3.6V — — 0 . 8

IIN Input Leakage Current (Control Inputs) 0V ≤ VIN ≤ VCC ——±1µA

IOZ Off-State Current (Hi-Z) 0V ≤ VOUT ≤ 5V, Switches OFF — — ±1 µ A

IOFF Data Input/Output Power Off Leakage VIN or VOUT 0V to 5V, VCC = 0V — — ±1 µA

VCC = 2.3V VIN = 0V ION = 30mA — 6 8

RON Switch ON Resistance Typical at VCC = 2.5V VIN = 1.7V ION = 15mA — 7 9 Ω

VCC = 3V VIN = 0V ION = 30mA — 4 6

VIN = 2.4V ION = 15mA — 5 8

DC ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE

Following Conditions Apply Unless Otherwise Specified:

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

NOTE:

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

INDUSTRIAL TEMPERATURE RANGE

IDTQS3VH384

2.5V / 3.3V 10-BIT HIGH BANDWIDTH BUS SWITCH

TYPICAL ICCD vs ENABLE FREQUENCY CURVE A T VCC = 3.3V

ICCD (mA)

ENABLE FREQUENCY (MHz)

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. A and B pins do not contribute to ∆Icc.

3. This parameter is guaranteed but not tested.

4. This parameter represents the current required to switch internal capacitance at the specified frequency. The A and B inputs do not contribute to the Dynamic Power Supply

Current. This parameter is guaranteed but not production tested.

POWER SUPPLY CHARACTERISTICS

Symbol Parameter Test Conditions(1) Min. Typ. Max. Unit

ICCQ Quiescent Power Supply Current VCC = Max., VIN = GND or VCC, f = 0 — 1 4 mA

∆ICC Power Supply Current (2,3) per Input HIGH VCC = Max., VIN = 3V, f = 0 per Control Input — — 30 µA

ICCD Dynamic Power Supply Current (4) VCC = 3.3V, A and B Pins Open, Control Inputs See Typical ICCD vs Enable Frequency graph below

Toggling @ 50% Duty Cycle

0 2 4 6 8 10 12 14 16 18 20

INDUSTRIAL TEMPERATURE RANGE

IDTQS3VH384

2.5V / 3.3V 10-BIT 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)

Symbol Parameter Min. (4) Max. Min. (4) Max. Unit

tPLH Data Propagation Delay(2,3) 0.2 0.2 ns

tPHL Ax to/from Bx

tPZL Switch Turn-On Delay 1.5 7.5 1.5 7.5 ns

tPZH xOE to Ax/Bx

tPLZ Switch Turn-Off Delay 1.5 7 1.5 7 ns

tPHZ xOE to Ax/Bx

fxOE Operating Frequency -Enable(2,5) 10 20 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 CL = 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 xOE control input (pass voltage > VCC, VIN = 5V, RLOAD ≥ 1MΩ, no CLOAD).

INDUSTRIAL TEMPERATURE RANGE

IDTQS3VH384

2.5V / 3.3V 10-BIT HIGH BANDWIDTH BUS SWITCH

PHY

3VH

SWITCH

4.5VPP

LOGIC

SIDE Z = 100 Ω10Mbps to 100Mbps

2VPP

4.5VPP

LOGIC

SIDE

Z = 100 Ω

TW ISTED PAIR

>100m

CHARGE PUM P

Vcc = 3.3 V

0 to + 5 V NFET

+6.5V

DRIVER

0 to + 5V

SINGLE HOT

SWITCH

CARD I/O ON C ARD

LOGIC

CONNECTOR

QS3VHXXX

CPU

RAM

BUS

CARD I/O ON C ARD

LOGIC

CONNECTOR

QS3VHXXX

PLUG GABLE CARD/ LIVE SYSTEM ZERO DOWN TIME SYSTEM

Rail-to-Rail Switching

SOME APPLICATIONS FOR HOTSWITCH PRODUCTS

Fast Ethernet Data Switching (LAN Switch)

Hot-Swapping

INDUSTRIAL TEMPERATURE RANGE

IDTQS3VH384

2.5V / 3.3V 10-BIT HIGH BANDWIDTH BUS SWITCH

Open

VLOAD

GND

VCC

Pulse

Generator D.U.T.

500Ω

VIN VOUT

(1, 2 )

SAME PHASE

INPUT TRANSITION

OPP OSITE PH ASE

INP UT TR AN SITION

VOH

VOL

tPLH tPHL

tPHL

tPLH

OUTPUT

VIH

CONTROL

INPUT tPLZ 0V

OUTPUT

NORMALLY

LOW tPZH

SWITCH

CLOSED

OUTPUT

NORMALLY

HIGH

ENABLE DISABLE

SWITCH

OPEN

tPHZ

VOL + VLZ

VOH

tPZL

VLOAD/2 VLOAD/2

VIH

VOL

VOH -VHZ

TEST CIRCUITS AND WAVEFORMS

TEST CONDITIONS

Symbol VCC(1)= 3.3V ± 0.3V VCC(2)= 2.5V ± 0.2V Unit

VLOAD 6 2 x Vcc V

VIH 3 Vcc V

VT1.5 VCC/2 V

VLZ 300 150 mV

VHZ 300 150 mV

CL50 30 pF

NOTE:

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

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.

DEFINITIONS:

CL = Load capacitance: includes jig and probe capacitance.

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

SWITCH POSITION

Test Switch

tPLZ/tPZL VLOAD

tPHZ/tPZH GND

tPD Open

Propagation Delay

Test Circuits for All Outputs

Enable and Disable Times

INDUSTRIAL TEMPERATURE RANGE

IDTQS3VH384

2.5V / 3.3V 10-BIT HIGH BANDWIDTH BUS SWITCH

ORDERING INFORMATION

IDTQS XXXXX XX

Package

Device Type

3VH384 2.5V/3.3V 10-Bit High Bandwidth Bus Switch

PAG

Quarter Size Out line Package

Thin Shri nk Small Out line Pack age

TSSOP - Green

CORPORATE HEADQUARTERS for SALES: for Tech Support:

2975 Stender Way 800-345-7015 or 408-727-6116 logichelp@idt.com

Santa Clara, CA 95054 fax: 408-492-8674 (408) 654-6459

www.idt.com

8/6/2002 Updated according to PCN Logic-0206-11

DATA SHEET DOCUMENT HISTORY