PI5C32X245B [PERICOM]

16-Bit, 2-Port BusSwitch; 16位， 2端口BusSwitch


型号：	PI5C32X245B
厂家：	PERICOM SEMICONDUCTOR CORPORATION
描述：	16-Bit, 2-Port BusSwitch 16位， 2端口BusSwitch
文件：	总4页 (文件大小：334K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

PI5C32X245

16-Bit, 2-Port BusSwitch

Product Features:

Description:

• Near-Zero propagation delay

Pericom Semiconductor’s PI5C32X245 is a 16-bit, 2-port bus

switch. Two enable signals (BEn) turn the switches on. The bus

switch creates no additional propagational delay or additional

ground bounce noise.

• 5Ω switches connect inputs to outputs

• Direct bus connection when switches are ON

• Ultra-low quiescent power (0.2µA typical)

– Ideally suited for notebook applications

•

Pin compatible with QS32X245

• Industrial operating temperature: –40°C to +85°C

• Packaging (Pb-free & Green available):

– 40-pin 150-mil wide plastic BQSOP (B)

Pin Conﬁguration

VCC

Block Diagram

39 BE1

GND 10

VCC

BE2

B10

A12

B11

B12

B13

A13

A14

A15

B14

GND

B15

(1)

Truth Table

Function

BEn

A0–15

Disconnect

Hi-Z

Pin Description

Connect

Note:

B0–15

Pin Name

I/O

Description

BEn

Bus Enable Input (Active LOW)

1. H = High Voltage Level, L = Low Voltage Level,

Hi-Z = High Impedance

A0-A15

B0-B15

I/O

Bus A

Bus B

PS7057E

09/16/04

PI5C32X245

16-Bit, 2-Port BusSwitch

Maximum Ratings

(Above which the useful life may be impaired. For user guidelines, not tested.)

Note:

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

Ambient Temperature with Power Applied .........................–40°C to +85°C

Supply Voltage to Ground Potential (Inputs & Vcc Only) ...–0.5V to +7.0V

Supply Voltage to Ground Potential (Outputs & D/O Only) –0.5V to +7.0V

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

DC Output Current............................................................................120 mA

Power Dissipation.................................................................................0.5W

Stresses greater than those listed under MAXIMUM RAT-

INGS 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. Ex-

posure to absolute maximum rating conditions for extended

periods may affect reliability.

DC Electrical Characteristics (Over the Operating Range, TA = –40°C to +85°C, VCC = 5V ±10%)

(1)

(2)

Parameters

Description

Input HIGH Voltage

Input LOW Voltage

Input HIGH Current

Input LOW Current

Test Conditions

Guaranteed Logic HIGH Level

Guaranteed Logic LOW Level

Min.

2.0

–0.5

–

Typ

–

Max. Units

–

0.8

= Max., V = V

–

±1

= Max., V = GND

–

±1

µA

High Impedance Output Current 0 ≤ A, B ≤ V

Clamp Diode Voltage = Min., I = –18 mA

–

OZH

–

–0.7

–1.2

–

(3)

Short Circuit Current

A (B) = 0V, B (A) = V

100

–

Input Hysteresis at Control Pins

–

150

–

Ω

= Min., V = 0.0V, I = 48 mA

–

(4)

Switch On-Resistance

= Min., V = 2.4V, I = 15 mA

Capacitance (TA = 25°C, f = 1 MHz)

(5)

Parameters

Description

Test Conditions

Typ

Units

CIN

Input Capacitance

COFF

CON

A/B Capacitance, Switch Off

A/B Capacitance, Switch On

VIN = 0V

Notes:

1. For Max. or Min. conditions, use appropriate value speciﬁed under Electrical Characteristics for the applicable device type.

2. Typical values are at V_CC= 5.0V, TA = 25°C ambient and maximum loading.

3. Not more than one output should be shorted at one time. Duration of the test should not exceed one second.

4. Measured by the voltage drop between A and B pin at indicated current through the switch. On-Resistance is determined

by the lower of the voltages on the two (A,B) pins.

5. This parameter is determined by device characterization but is not production tested.

PS7057E

09/16/04

PI5C32X245

16-Bit, 2-Port BusSwitch

Power Supply Characteristics

(1)

(2)

Parameters

Description

Test Conditions

Min.

Typ

Max.

Units

Quiescent Power

Supply Current

= Max.

= GND or V

0.1

3.0

µA

Supply Current per

Input @ TTL HIGH

(3)

ΔI

= Max.

= 3.4V

2.5

VCC = Max.,

A and B Pins Open

BEn = GND

Control Input Toggling

50% Duty Cycle

Supply Current per

Input per MHz

mA/

MHz

0.25

CCD

(4)

Notes:

1. For Max. or Min. conditions, use appropriate value speciﬁed under Electrical Characteristics for the applicable device.

2. Typical values are at Vcc = 5.0V, +25°C ambient.

3. Per TTL driven input (VIN = 3.4V, control inputs only); A and B pins do not contribute to Icc.

4. This current applies to the control inputs only and represent 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 not tested, but is guaranteed by design.

Switching Characteristics over Operating Range

Com.

(1)

Parameters

Description

Conditions

Unit

Min.

Max.

(2,3)

Propagation Delay

PLH

—

0.25

Ax to Bx, Bx to Ax

PHL

Bus Enable Time

BEX to Ax or Bx

C = 50pF

R = 500Ω

PZH

PZL

1.5

6.5

5.5

Bus Disable Time

BEx to Ax or Bx

PHZ

PLZ

Notes:

1. See test circuit and waveforms.

2. This parameter is guaranteed but not tested on Propagation Delays.

3. The bus switch contributes no propagational 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 0.25ns for 50pF load. Since this time constant is much smaller than the rise/fall times of

typical driving signals, it adds very little propagational delay to the system. Propagational 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.

PS7057E

09/16/04

PI5C32X245

16-Bit, 2-Port BusSwitch

Packaging Mechanical: 40-pin BQSOP (B)

X.XX

DENOTES DIMENSION IN MILLIMETERS

X.XX

Ordering Information

Ordering Code

PI5C32X245B

PI5C32X245BE

Package Code

Package Description

40-pin BQSOP

Pb-free & Green, 40-pin BQSOP

Notes:

1. Thermal characteristics can be found on the company web site at www.pericom.com/packaging/

Pericom Semiconductor Corporation • 1-800-435-2336 • www.pericom.com

PS7057E

09/16/04

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