QS3L2384SOX - Integrated Device Technology, Inc.

IDTQS3L2384

HIGH-SPEED LOW POWER CMOS 10-BIT BUS SWITCH INDUSTRIAL TEMPERATURE RANGE

FEBRUARY 2000

1999 Integrated Device Technology, Inc. DSC-5771/-c

IDTQS3L2384

INDUSTRIAL TEMPERATURE RANGE

QUICKSWITCH® PRODUCTS

HIGH-SPEED LOW POWER CMOS

10-BIT BUS EXCHANGE SWITCH

DESCRIPTION:

The QS3L2384 provides a set of ten high-speed CMOS TTL-compatible

bus switches. The Bus Enable (BE) signals turn the switches on. Two bus

enable signals are provided, one for each of the upper and lower five bits

of the two 10-bit buses. The QS3L2384 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.

The QS3L2384 is characterized for operation at -40°C to +85°C.

BEB

BEA

FUNCTIONAL BLOCK DIAGRAM

FEATURES:

− Enhanced N channel FET with no inherent diode to Vcc

− Low propagation delay, zero ground bounce

− Ultra low power with 0.2µA typical ICC

− Undershoot clamp diodes on all switch and control pins

− Two enables control five bits each

− Available in SOIC and QSOP Packages

APPLICATIONS

− Hot-swapping, hot-docking

− Voltage translation (5V to 3.3V)

− Power Conservation

− Capacitance reduction and isolation

− Bus isolation

− Clock gating

INDUSTRIAL TEMPERATURE RANGE

IDTQS3L2384

HIGH-SPEED LOW POWER CMOS 10-BIT BUS SWITCH

PIN CONFIGURATION

124BEA VCC

223B0B9

322A

421

A1A8

520

619

B2B7

817

A3A6

916B3B6

10 15B4B5

718

A2A7

11 14A4A5

12 13

GND BEB

SO24-2

SO24-8

SOIC/ QSOP

TOP VIEW

ABSOLUTE MAXIMUM RATINGS (1)

Symbol Description Max. Unit

VTERM(2) Supply Voltage to Ground – 0.5 to +7 V

VTERM(3) DC Switch Voltage VS– 0.5 to +7 V

VTERM(3) DC Input Voltage VIN – 0.5 to +7 V

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

IOUT DC Output Current 120 mA

PMAX Maximum Power Dissipation (TA = 85°C) 0.5 W

TSTG Storage Temperature – 65 to +150 °C

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 c onditions abov e those indic ated in the operati onal s ections

of this specification is not implied. Exposure to absolute maximum

rating condit ions for ext ended periods may aff ec t reliability.

2. Vcc Terminals.

3. All terminals except Vc c.

CAPACITANCE

(TA = +25OC, f = 1.0MHz, VIN = 0V, VOUT = 0V)

Pins Typ. Max. (1) Unit

Control Inputs 3 5 pF

Quickswitch Channels (Switch OFF) 5 7 pF

NOTE:

1. This parameter is guaranteed but not product i on tested.

PIN DESCRIPTION

Pin Names I/O Description

A0-A9I/O Bus A

B0-B9I/O Bus B

BEA, BEB I Bus Switch Enable

FUNCTION TABLE(1)

BEA BEB B0 - B4B5 - B 6Function

H H Hi-Z Hi-Z Disconnect

LHA

- A4Hi-Z Connect

HLHi-ZA

- A9Connect

LLA

- A4A5 - A9Connect

NOTE:

1. H

HIGH Volta

e Level

LOW Volta

e Level

h-Impedence

IDTQS3L2384

HIGH-SPEED LOW POWER CMOS 10-BIT BUS SWITCH INDUSTRIAL TEMPERATURE RANGE

RON

(ohms)

VIN

(Volts)

TYPICAL ON RESISTANCE vs VIN AT VCC = 5V

00.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5

DC ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE

Following Conditions Apply Unless Otherwise Specified:

Industrial: TA = -40°C to +85°C, VCC = 5.0V ± 5%

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

VIH Input HIGH Voltage Guaranteed Logic HIGH for Control Pins 2 — — V

VIL Input LOW Voltage Guaranteed Logic LOW for Control Pins — — 0.8 V

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

µA

OZ Off-State Current (Hi-Z) 0V ≤ VOUT ≤ Vcc — ±0.01 ±1 µA

RON Switch ON Resistance Vcc = Min., VIN = 0V, ION = 30mA 20 28 40 Ω

RON Switch ON Resistance Vcc = Min., VIN = 2.4V, ION = 15mA 20 35 48 Ω

VPPass Voltage (2) VIN = VCC = 5V, IOUT = -5µA3.7 4 4.2 V

NOTES:

1. Typical values are at VCC = 5.0V , TA = 25°C.

2. Pas s voltage is guaranteed but not producti on tested.

INDUSTRIAL TEMPERATURE RANGE

IDTQS3L2384

HIGH-SPEED LOW POWER CMOS 10-BIT BUS SWITCH

POWER SUPPLY CHARACTERISTICS

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

ICCQ Quiescent Power Supply Current VCC = Max., VIN = GND or Vcc, f = 0 0.2 3 µA

∆ICC Power Supply Current per Control Input HIGH (2) VCC = Max., VIN = 3.4V, f = 0 — 2.5 mA

ICCD Dynamic Power Supply Current per MHz(3) VCC = Max., A and B pins open

Control Input Toggling at 50% Duty Cycle — 0.25 mA/MHz

NOTES:

1. For conditi ons shown as Min. or M ax., use t he appropri at e values speci fied under DC Elect ri c al Characteristi cs.

2. Typical values are at VCC = 5.0V , T A = 25° C

3. Per TLL driven i nput (VIN = 3.4V, c ont rol i nputs only). A and B pins do not contribute to ∆Icc.

4. This current applies to the control inputs only and repres ents the current required to switch i nternal capacitanc e at the specified frequency . The A

and B inputs generate no significant AC or DC currents as they t rans i tion. This param et er i s guaranteed but not produc t i on tested.

SWITCHING CHARACTERISTICS OVER OPERATING RANGE

Industrial: TA = -40°C to +85°C, VCC = 5.0V ± 5%

CLOAD = 50pF, RLOAD = 500Ω

Symbol

Parameter Min. (1) Typ. Max. Unit

tPLH

tPHL Data Propagation Delay (2,4)

Ax to Bx, Bx to Ax — — 1.25 (3) ns

tPZL

tPZH Switch Turn-on Delay

BEA, BEB to Ax, Bx 1.5 — 7.5 ns

tPLZ

tPHZ Switch Turn-off Delay (2)

BEA, BEB to Ax, Bx 1.5 — 5.5 ns

NOTES:

1. Mini m um s are guaranteed but not produc t i on tested.

2. This param et er i s guaranteed but not produc tion tested.

3. The time constant for the switch alone is of the order of 1.25ns for CL = 50pF.

4. The bus s wi tch contributes no propagation delay ot her than the RC delay of the ON resistance of the swit ch and the load capaci tance. Since this

time c onstant is m uch smaller than the rise and fall times of t ypical drivi ng signals, it adds very li ttle propagation delay to the system. Propagation

delay of t he bus switch, when used in a system, is determined by the driv i ng circuit on the dri ving side of t he switch and it s i nteraction wit h the load

on the driven side.

IDTQS3L2384

HIGH-SPEED LOW POWER CMOS 10-BIT BUS SWITCH INDUSTRIAL TEMPERATURE RANGE

ORDERING INFORMATION

IDTQS XXXXX XX

Package

Device Type

Blank Indu s tri a l ( - 40 °C to +85° C)

Sm all Outline IC (S O24-2)

Quarter S ize O utline Package (SO24-8)

3L2384 H igh Speed Low Pow er C MO S 10-Bit Bus Switch

Process

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