PI5C32X384 [PERICOM]

20-Bit, 2-Port Bus Switch; 20位， 2端口总线开关


型号：	PI5C32X384
厂家：	PERICOM SEMICONDUCTOR CORPORATION
描述：	20-Bit, 2-Port Bus Switch 20位， 2端口总线开关开关
文件：	总5页 (文件大小：309K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

PI5C32X384/32X384C

20-Bit, 2-Port Bus Switch

Features

Description

• Near-Zero propagation delay

• 5Ω switches connect inputs to outputs

• Direct bus connection when switches are ON

Pericom Semiconductor’s PI5C32X384 and PI5C32X384C are

20-bit bus switches designed with a low On-Resistance allowing

inputstobeconnecteddirectlytooutputs.Thebusswitchcreatesno

additional propagational delay or additional ground bounce noise.

The switches are turned ON by the Bus Enable (BE) input signal.

Four bus enable signals are provided, one for each of the upper

and lower ﬁve bits of the two 10-bit buses.

• Ultra-low quiescent power 32X384 (0.2µA typical)

– Ideally suited for notebook applications

• Packaging (Pb-free & Green Available):

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

– 48-pin 240-mil wide plastic TSSOP (A)

Pin Conﬁguration

Block Diagram

GND

Pin Description

Pin Name

Description

Bus Enable Inputs (Active LOW)

A -A

Bus A

Bus B

Ground

Power

B -B

GND

PS7027F

09/09/04

PI5C32X384/PI5C32X384C

20-Bit, 2-Port Bus Switch

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................................................................................120mA

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.

Exposure to absolute maximum rating conditions for ex-

tended periods may affect reliability.

(1)

Truth Table

Function

Disconnect

Connect

Function

Disconnect

Connect

Note:

BEA

BEB

B4-B0

Hi-Z

B19-B15

Hi-Z

A4-A0

Hi-Z

A19-A15

B14-B10

Hi-Z

A4-A0

B9-B5

Hi-Z

BEC

BED

A9-A5

Hi-Z

A14-A10

A9-A5

1. H = High Voltage Level

L = Low Voltage Level

Hi-Z = High Impedance

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

(1)

(2)

Parameters

Description

Test Condidtions

Guaranteed Logic HIGH Level

Guaranteed Logic LOW Level

Min.

Typ.

Max. Units

Input HIGH Voltage

2.0

Input LOW Voltage

0.8

Input HIGH Current

= Max., V = V

±1

Input LOW Current

= Max., V = GND

±1

High Impedance Output Current

0 ≤ (A, B) (C, D) ≤ V

OZH

(3)

Short Circut Current

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

300

Ω

Input Hysteresis at Control Pins

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

(4)

Switch On-Resistance

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

PS7027F

09/09/04

PI5C32X384/PI5C32X384C

20-Bit, 2-Port Bus Switch

Capacitance (T = 25°C, f = 1 MHz)

(5)

Parameters

Descritption

Test Condidtions

Type

Max.

Units

Input Capacitance

= 0V

A/B Capacitance, Switch OFF

A/B Capacitance, Switch On

OFF

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, T_A= 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 AB and CD pin at indicated current through the switch. On-Resistance is determined

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

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

Power Supply Characteristics

(1)

(2)

Parameters

Description

Test Condidtions

Min. Typ.

Max. Units

Quiescent Power Sup-

ply Current

or V

= GND PI5C32X384C

0.1

200

µA

3.0

= Max.

PI5C32X384

Supply Current per

Input @ TTL HIGH

∆I

= Max.

= Max.,

2.5

A and B Pins Open

BE1 or BE2 = 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. conditons, use appropriate value speciﬁed under Electrical Characteristics for the applicable device.

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

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

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.

PS7027F

09/09/04

PI5C32X384/PI5C32X384C

20-Bit, 2-Port Bus Switch

Switching Characteristics over Operating Range

PI5C32X384/PI5C32X384C

(1)

Parameters

Description

Conditions

Units

Min.

Typ.

Max.

PLH

(2,3)

Propagation Delay

A to B , B to A

0.25

PHL

C = 50 pF,

R = 500Ω

PZH

Bus Enable Time BE to A or B

1.5

6.5

5.5

PZL

PHZ

Bus Disable Time BE to A or B

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.

Package Mechanical: 48-pin TSSOP (A)

.236

.244

6.0

6.2

.488 12.4

.496 12.6

.047

1.20 Max

SEATING PLANE

0.09

0.20

.004

.008

0.45 .018

0.75 .030

.002

.006

0.05

0.15

.007

.010

.0197

BSC

.319

BSC

X.XX

DENOTES DIMENSIONS

IN MILLIMETERS

0.50

0.17

0.27

8.1

PS7027F

09/09/04

PI5C32X384/PI5C32X384C

20-Bit, 2-Port Bus Switch

Package Mechanical: 48-pin BQSOP (B)

.150

.157

.228

.244

3.80

4.00

5.80

6.20

Gauge Plane

.010 0.25

.020

.029

0.50

0.75

BSC

.386

.394

9.80

10.00

.015 0.381

x 45˚

REF

.014 0.356

.008 0.20 Nom

Nom

1.60

.063

.079

2.0

Max

.002 0.05

.009 0.25

5˚

.0157 BSC

0.40

.0051

.009

0.13

0.23

X.XX

DENOTES DIMENSIONS

IN MILLIMETERS

Ordering Information

Ordering Code

PI5C32X384B

Package Code

Package Description

48-pin 150-mil wide plastic BQSOP

PI5C32X384BE

PI5C32X384A

Pb-free & Green, 48-pin 150-mil wide plastic BQSOP

48-pin 240-mil wide plastic TSSOP

PI5C32X384AE

PI5C32X384CA

PI5C32X384CAE

PI5C32X384CB

PI5C32X384CBE

Pb-free & Green, 48-pin 240-mil wide plastic TSSOP

48-pin 240-mil wide plastic TSSOP

Pb-free & Green, 48-pin 240-mil wide plastic TSSOP

48-pin 150-mil wide plastic BQSOP

Pb-free & Green, 48-pin 150-mil wide plastic 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

PS7027F

09/09/04

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