IDT74CBTLV3251 [IDT]

LOW-VOLTAGE 8:1 MULTIPLEXER/ DEMULTIPLEXER; 低电压8： 1多路复用器/解复用器


型号：	IDT74CBTLV3251
厂家：	INTEGRATED DEVICE TECHNOLOGY
描述：	LOW-VOLTAGE 8:1 MULTIPLEXER/ DEMULTIPLEXER 低电压8： 1多路复用器/解复用器解复用器
文件：	总5页 (文件大小：159K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

IDT74CBTLV3251

INDUSTRIALTEMPERATURERANGE

LOW-VOLTAGE8:1MULTIPLEXER/DEMULTIPLEXER

LOW-VOLTAGE

IDT74CBTLV3251

8:1 MULTIPLEXER/

DEMULTIPLEXER

DESCRIPTION:

FEATURES:

TheCBTLV3251is a1-of-8high-speedmultiplexer/demultiplexer.The

lowon-state resistance ofthe switchallows connections tobe made with

minimalpropagationdelay.

−

Functionally equivalent to QS3251

5Ω Switch Connection between Two Ports

Isolation Under Power-Off Conditions

Over-voltage tolerant

Latch-up performance exceeds 100ma

VCC = 2.3V - 3.6V, normal range

ESD > 2000V per MIL-STD-883, Method 3015;

> 200V using machine model (C = 200pF, R = 0)

Available in SSOP, QSOP, and TSSOP packages

The select input (S0, S1, S2) controls the data flow. The multiplexer/

demultiplexerswitches aredisabledwhentheoutput-enable(OE)inputis

high.

To ensure that the device is in high-impedance state during power up

or power down, OE should be tied to VCC through a pullup resistor; the

minimumvalueoftheresistorisdeterminedbythecurrent-sinkingcapability

of the driver.

−

FUNCTIONALBLOCKDIAGRAM

TheIDTlogoisaregisteredtrademarkofIntegratedDeviceTechnology,Inc.

INDUSTRIAL TEMPERATURE RANGE

APRIL 2001

2001 Integrated Device Technology, Inc.

DSC-5403/-

IDT74CBTLV3251

INDUSTRIALTEMPERATURERANGE

LOW-VOLTAGE8:1MULTIPLEXER/DEMULTIPLEXER

ABSOLUTE MAXIMUM RATINGS ⁽¹⁾

PINCONFIGURATION

Symbol

Description

Supply Voltage Range

Max.

Unit

VCC

–0.5 to 4.6

V^CC

–0.5 to 4.6

128

Input Voltage Range

Continuous Channel Current

IIK

Input Clamp Current, VI/O < 0

Storage Temperature

–50

°C

TSTG

–65 to +150

SO16-7

SO16-9

SO16-10

NOTE:

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.

GND

QSOP/ SSOP/ TSSOP

TOP VIEW

FUNCTION TABLE ⁽¹⁾

Inputs

Function

SIMPLIFIEDSCHEMATIC,EACH

SWITCH

A Port = B1 Port

A Port = B2 Port

A Port = B3 Port

A Port = B4 Port

A Port = B5 Port

A Port = B6 Port

A Port = B7 Port

A Port = B8 Port

Disconnect

NOTE:

1. H = HIGH Voltage Level

L = LOW Voltage Level

X = Don't Care

CONTROL

CIRCUITRY

OPERATING CHARACTERISTICS ⁽¹⁾

Unit

Symbol

Parameter

Test Conditions

Min.

Max.

VCC

Supply Voltage

2.3

1.7

3.6

VIH

VIL

High-Level Control Input Voltage

Low-Level Control Input Voltage

Operating Free-Air Temperature

VCC = 2.3V to 2.7V

VCC = 2.7V to 3.6V

VCC = 2.3V to 2.7V

VCC = 2.7V to 3.6V

—

−40

0.7

0.8

+85

°C

NOTE:

1. All unused control inputs of the device must be held at V^CCor GND to ensure proper operation.

IDT74CBTLV3251

INDUSTRIALTEMPERATURERANGE

LOW-VOLTAGE8:1MULTIPLEXER/DEMULTIPLEXER

DC ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE

Following Conditions Apply Unless Otherwise Specified:

Operating Condition: T^A= – 40°C to +85°C

Symbol

Parameter

Test Conditions

VCC = 3V, II = −18mA

Min.

Typ. ⁽¹⁾

Max.

Unit

VIK

Control Inputs, Data I/O

—

– 1.2

Control Inputs, Data I/O

Data I/O

VCC = 3.6V, VI = VCC or GND

—

±1

300

—

µA

IOZ

IOFF

ICC

VCC = 3.6V, VO = 0 or 3.6V, switch disabled

VCC = 0, VI or VO = 0 to 3.6V

VCC = 3.6V, IO = 0, VI = VCC or GND

VCC = 3.6V, One input at 3V, Other inputs at VCC or GND

VI = 3V or 0

(2)

∆ICC

Control Inputs

A port

CIO(OFF)

VO = 3V or 0, OE = VCC = 3.3V

40.5

B port

Max at V_CC= 2.3V

Typ at VCC = 2.5V

V = 0

I_O= 64mA

IO = 24ma

IO = 15mA

IO = 64mA

IO = 24mA

IO = 15mA

(3)

VI = 1.7V

VI = 0

Ω

VCC = 3V

VI = 2.4V

NOTES:

1. Typical values are at V^CC= 3.3V, +25°C ambient.

2. The increase in supply current is attributable to each output that is at the specified voltage level rather than V^CCor GND.

3. This is measured by the voltage drop between the A and B terminals at the indicated current through the switch. On-state resistance is determined

by the lower of the voltages of the two (A or B) terminals.

SWITCHING CHARACTERISTICS

VCC = 2.5V ± 0.2V

VCC = 3.3V ± 0.3V

Symbol

Parameter

Min.

Max.

Min.

Max.

Unit

(1)

t^PD

Propagation Delay

A to B or B to A

Select Time

S to A or B

−

0.15

−

0.25

t^SEL

t^EN

4.8

5.1

4.5

5.3

4.8

Enable Time

S to B

t^DIS

Disable Time

S to B

t^EN

Enable Time

OE to A or B

Disable Time

OE to A or B

t^DIS

5.5

NOTE:

1. The propagation delay is the calculated RC time constant of the typical on-state resistance of the switch and the specified load capacitance when

driven by an ideal voltage source (zero output impedance).

IDT74CBTLV3251

INDUSTRIALTEMPERATURERANGE

LOW-VOLTAGE8:1MULTIPLEXER/DEMULTIPLEXER

TEST CIRCUITS AND WAVEFORMS

TEST CONDITIONS

PROPAGATIONDELAY/SELECTTIME

(1)

(2)

VIH

Symbol

VCC = 3.3V ± 0.3V

VCC = 2.5V ± 0.2V

Unit

SAME PHASE

VLOAD

2 xVcc

Vcc

INPUT TRANSITION

t^PHL

VIH

t^PLH

VOH

OUTPUT

1.5

300

VCC/2

150

VOL

VLZ

VHZ

t^PHL

t^PLH

150

VIH

OPPOSITE PHASE

INPUT TRANSITION

TEST CIRCUITS FOR ALL OUTPUTS

ENABLEANDDISABLETIMES

V^LOAD

V^CC

DISABLE

ENABLE

t^PZL

V^IH

V^T

Open

GND

CONTROL

INPUT

500Ω

t^PLZ

V^IN

V^OUT

(1, 2)

Pulse

V^LOAD/2

V^T

D.U.T.

V^LOAD/2

V^{OL +}V^LZ

V^OL

OUTPUT

NORMALLY

LOW

Generator

SWITCH

CLOSED

t^PHZ

R^T

tPZH

C^L

V^OH

V^{OH -}V^HZ

OUTPUT

NORMALLY

HIGH

SWITCH

OPEN

V^T

DEFINITIONS:

NOTE:

C^L= Load capacitance: includes jig and load capacitance.

R^T= Termination resistance: should be equal to Z^OUTof the pulse

generator.

1. Diagram shown for Input Control Enable-LOW and Input Control

Disable-HIGH.

NOTES:

1. Pulse Generator for all pulses: Rate ≤ 10MHz; t^F≤ 2.5ns, t^R≤ 2.5ns

2. Pulse Generator for all pulses: Rate ≤ 10MHz; t^F≤ 2ns, t^R≤ 2ns

SWITCH POSITION

Test

Switch

tPLZ / tPZL

VLOAD

tPHZ / tPZH

tPD

GND

Open

tSEL

IDT74CBTLV3251

INDUSTRIALTEMPERATURERANGE

LOW-VOLTAGE8:1MULTIPLEXER/DEMULTIPLEXER

ORDERINGINFORMATION

CBTLV

XXX

IDT

Temp. Range

Device Type Package

Quarter-Size Small Outline Package (SO16-7)

Shrink Small Outline Package (SO16-9)

Thin Shrink Small Outline Package (SO16-10)

3251

Low-Voltage 1-of-8 Multiplexer/Demultiplexer

–40°C to +85°C

CORPORATE HEADQUARTERS

for SALES:

for Tech Support:

2975StenderWay

Santa Clara, CA 95054

800-345-7015 or 408-727-6116

fax: 408-492-8674

logichelp@idt.com

(408) 654-6459

www.idt.com

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