IDTQS32384H - Integrated Device Technology

FEATURES/BENEFITS

• Enhanced N channel FET with no inherent diode to VCC

•5

ΩΩ

Ω bidirectional switches connect inputs to outputs

• Zero propagation delay (QS3384), zero ground bounce

• Undershoot clamp diodes on all switch and control pins

• QS32384 is 25ΩΩ

ΩΩ

Ω version for low noise

• Two enables control five bits each

• Available in TSSOP, SOIC, QSOP AND HQSOP

APPLICATIONS

• Hot-swapping, hot-docking

(Application Note AN-13)

• Voltage translation

(5V to 3.3V; Application Note AN-11)

• Power conservation

• Capacitance reduction and isolation

• Bus isolation

• Clock gating

DESCRIPTION

The QS3384 and QS32384 provide a set of ten high-speed CMOS,

TTL-compatible bus switches. The low ON resistance of QS3384

allows inputs to be connected to outputs without adding propagation

delay and without generating additional ground bounce. Two banks of

5 switches are controlled by independent Bus Enable (BE) signals.

The QS32384 adds an internal series resistor with each switch to

reduce reflection noise in high speed applications. When closed, the

switch acts as the source (series) termination for the driver connected

to it.

BEB

BEA

QS3384

QS32384

QUICKSWITCH® PRODUCTS

HIGH-SPEED CMOS

10-BIT BUS SWITCHES

FUNCTIONAL BLOCK DIAGRAM

JULY 1999

 1999 Integrated Device Technology, Inc DSC-XXXXXX

 1999 Integrated Device Technology, Inc

IDT

QS3384 AND QS32384

DSC-XXXXXX

SOIC, QSOP

Pins Typ Max Unit

Control Inputs 3 5 pF

QuickSwitch Channels 5 7 pF

(Switch OFF)

Name I/O Function

A0-A9 I/O Bus A

B0-B9 I/O Bus B

BEA, BEB I Bus Switch Enable

PIN DESCRIPTION

ABSOLUTE MAXIMUM RATINGS

Supply Voltage to Ground ........................................................................ –0.5V to 7.0V

DC Switch Voltage VS.............................................................................. –0.5V to 7.0V

DC Input Voltage VIN ................................................................................ –0.5V to 7.0V

AC Input Voltage (for a pulse width ≤ 20ns)..........................................................–3.0V

DC Output Current Max. Sink Current/Pin...........................................................120mA

Maximum Power Dissipation ............................................................................0.5 watts

TSTG Storage Temperature ...................................................................... –65° to 150°C

Note: ABSOLUTE MAXIMUM CONTINU-

OUS 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. Functional operation under

absolute-maximum conditions is not implied.

PIN CONFIGURATION

(ALL PINS TOP VIEW)

TSSOP, SOIC, QSOP, HQSOP

CAPACITANCE

TA = 25°C, f = 1MHz, VIN = 0V, VOUT = 0V

Note:Capacitance is guaranteed but not

production tested. For total capacitance while

the switch is ON, please see Section 1 under

“Input and Switch Capacitance.”

BEA BEB B0-B4 B5-B9 Function

H H Hi-Z Hi-Z Disconnect

L H A0-A4 Hi-Z Connect

H L Hi-Z A5-A9 Connect

L L A0-A4 A5-A9 Connect

FUNCTION TABLE

BEA

GND

BEB

 1999 Integrated Device Technology, Inc

IDT

QS3384 AND QS32384

DSC-XXXXXX

DC ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE

Commercial: TA = –40°C to 85°C, VCC = 5.0V ±5% Military: TA = –55°C to 125°C, VCC = 5.0V ±10%

Symbol Parameter Test Conditions Min Typ(1) Max Unit

VIH Input HIGH Voltage Guaranteed Logic HIGH 2.0 — — V

for Control Inputs

VIL Input LOW Voltage Guaranteed Logic LOW — — 0.8 V

for Control Inputs

| IIN | Input Leakage Current 0 ≤ VIN ≤ VCC — 0.01 1 µA

(Control Inputs)

| IOZ | Off-State Current (Hi-Z) 0 ≤ VOUT ≤ VCC, Switches OFF — 0.01 1 µA

RON Switch ON Resistance(2) VCC = Min., 3384 (Com) — 5 7 Ω

VIN = 0.0V 3384 (Mil) — 10 15

ION = 30mA 32384 (Com) 20 28 40

32384 (Mil) — 35 45

RON Switch ON Resistance(2) VCC = Min., 3384 (Com) — 10 15 Ω

VIN = 2.4V 3384 (Mil) — 15 20

ION = 15mA 32384 (Com) 20 35 48

32384 (Mil) — 40 55

VPPass Voltage(3) VIN = VCC = 5V, IOUT = –5µA 3.7 4 4.2 V

TYPICAL ON RESISTANCE VS VIN AT VCC = 5.0V (QS3384)

Notes:

1. Typical values indicate VCC = 5.0V and TA = 25°C.

2. For a diagram explaining the procedure for RON measurement, please see Section 1 under “DC Electrical Characteristics.” Max. value of RON guaranteed, but not

production tested.

3. Pass Voltage is guaranteed but not production tested.

Note: For QS32384, add 23Ω to RON shown.

(ohms)

0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5

(Volts)

 1999 Integrated Device Technology, Inc

IDT

QS3384 AND QS32384

DSC-XXXXXX

POWER SUPPLY CHARACTERISTICS OVER OPERATING RANGE

Commercial: TA = –40°C to 85°C, VCC = 5.0V ±5% Military: TA = –55°C to 125°C, VCC = 5.0V ±10%

Symbol Parameter Test Conditions(1) Max Unit

ICCQ Quiescent Power VCC = Max., VIN = GND or VCC, f = 0 1.5 mA

Supply Current

∆ICC Power Supply Current VCC = Max., VIN = 3.4V, f = 0 2.5 mA

per Input HIGH(2) per Control Input

QCCD Dynamic Power Supply VCC = Max., A and B Pins Open, Control 0.25 mA/

Current per MHz(3) Inputs Toggling @ 50% Duty Cycle MHz

QS3384 QS32384

Symbol Description(1) Min Typ Max Min Typ Max Unit

tPLH Data Propagation Delay(2,4) COM — — 0.25(3) — — 1.25(3) ns

tPHL Ai to Bi, Bi to Ai MIL — — 0.75(3) — — 1.75(3)

tPZL Switch Turn-on Delay COM 1.5 — 6.5 1.5 — 7.5 ns

tPZH BEA, BEB to Ai, Bi MIL 1.5 — 7.5 1.5 — 8.5

tPLZ Switch Turn-off Delay(2) COM 1.5 — 5.5 1.5 — 5.5 ns

tPHZ BEA, BEB to Ai, Bi MIL 1.5 — 6.5 1.5 — 6.5

SWITCHING CHARACTERISTICS OVER OPERATING RANGE

Commercial: TA = –40°C to 85°C, VCC = 5.0V ±5% Military: TA = –55°C to 125°C, VCC = 5.0V ±10%

CLOAD = 50pF, RLOAD = 500Ω unless otherwise noted.

Notes:

1. See Test Circuit and Waveforms. Minimums guaranteed but not production tested.

2. This parameter is guaranteed by but not production tested.

3. The time constant for the switch alone is of the order of 0.25ns for QS3384 and 1.25ns for QS3284 for C L = 50pF.

4. The bus switch contributes no propagation delay other than the RC delay of the ON resistance of the switch and the load capacitance. Since this time constant is much smaller

than the rise/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.

Notes:

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

2. Per TTL driven input (VIN = 3.4V, control inputs only). A and B pins do not contribute to ∆ICC.

3. This current applies to the control inputs only and represents the current required to switch internal capacitance at the specified frequency. The A and B inputs generate no

significant AC or DC currents as they transition. This parameter is guaranteed by characterization, but not production tested.

CORPORATE HEADQUARTERS for SALES:

2975 Stender Way 800-345-7015 or 408-727-6116

Santa Clara, CA 95054 fax: 408-492-8674

www.idt.com*

*To search for sales office near you, please click the sales button found on our home page or dial the 800# above and press 2.

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

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Product

QS3384

High-Speed CMOS 10-Bit Bus Switch

Speeds Package Temp Supp Other Available

0.25ns H,PG,Q,

SO I5V 24-Pin Sample: Now

Production: Now