PI5C3257QE - Pericom - Datasheet.World

1PS7018I 11/16/09

Pin Description

Pin Name Description

IAn-IDn Data Inputs

S Select Inputs

E Enable

YA-YD Data Outputs

GND Ground

VCC Power

Description

Pericom Semiconductor’s PI5C3257 is a Quad 2:1 multiplexer/

demultiplexer with three-state outputs that is pinout and function

compatible with the PI74FCT257T, 74F257, and 74ALS/AS/LS257.

Inputs can be connected to outputs with low On-Resistance (5Ω)

with no additional ground bounce noise or propagation delay.

Block Diagram

PI5C3257

Quad 2:1 Mux/DeMux Bus Switch

Features:

• Near-Zero propagation delay

• 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 74 series 257 logic devices

• Packaging (Pb-free & Green available):

– 16-pin 150-mil wide plastic QSOP (Q)

– 16-pin 150-mil wide plastic SOIC (W)

– 16-pin 173-mil wide plasticTSSOP (L)

Pin Conﬁ guration

Truth Table(1)

E S YA YB YC YD Function

H X Hi-Z Hi-Z Hi-Z Hi-Z Disable

L L IA0 IB0 IC0 ID0 S = 0

L H IA1 IB1 IC1 ID1 S = 1

Note:

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

IA0 IA1 IB0 IB1 IC0 IC1 ID0 ID1

YA YB YC YD

IA0

IA1

IB0

IB1

GND

VCC

ID0

ID1

IC0

IC1

09-0005

PI5C3257

Quad 2:1 Mux/DeMux Bus Switch

2PS7018I 11/16/09

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

Note:

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 spec i ﬁ ca tion is not implied. Ex-

po sure to absolute maximum rating conditions for extended

periods may affect re li abil i ty.

Capacitance (TA = 25°C, f = 1 MHz)

Parameters(1) De scrip tion Test Conditions Typ Max. Units

CIN Input Capacitance

VIN = 0V

pFCOFF In/Yn Capacitance, Switch Off 6

CON In/Yn Capacitance, Switch On 14

Maximum Ratings

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

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

Parameters De scrip tion Test Conditions(1) Min. Typ(2) Max. Units

VIH Input HIGH Voltage Guaranteed Logic HIGH Level 2.0 V

VIL Input LOW Voltage Guaranteed Logic LOW Level –0.5 0.8

IIH Input HIGH Current VCC = Max., VIN = VCC ±1

μAIIL Input LOW Current VCC = Max., VIN = GND ±1

IOZH High Impedance Output Current 0 ≤ I, Y ≤ VCC ±1

VIK Clamp Diode Voltage VCC = Min., IIN = –18 mA –0.7 –1.2 V

IOS Short Circuit Current(3) I (Y) = 0V, Y (I) = VCC 100 mA

VHInput Hysteresis at Control Pins 150 mV

RON Switch On-Resistance(4) VCC = Min., VIN = 0.0V, ION = 48mA 5 7 Ω

VCC = Min., VIN = 2.4V, ION = 15mA 10 15

Notes:

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

2. Typical values are at VCC = 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 I and Y pin at indicated current through the switch. On-Resistance is determined

by the lower of the voltages on the two (I,Y) pins.

Notes:

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

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PI5C3257

Quad 2:1 Mux/DeMux Bus Switch

3PS7018I 11/16/09

Switching Characteristics over Operating Range

Parameters De scrip tion Conditions Com. Units

Min. Max.

tIY Propagation Delay(1,2)

In to Yn

CL = 50pF

RL = 500Ω

0.25

tSY Bus Select Time

Sn to Yn 0.5 5.2

tPZH

tPZL

Bus Enable Time

E to Yn 0.5 4.8

tPHZ

tPLZ

Bus Disable Time

E to Yn 0.5 5.0

Power Supply Characteristics

Parameters De scrip tion Test Conditions(1) Min. Typ(2) Max. Units

ICC Quiescent Power

Supply Current VCC = Max. VIN = GND

or VCC 0.1 3.0 μA

∆ICC Supply Current per

Input @ TTL HIGH VCC = Max. VIN = 3.4V(3) 2.5 mA

ICCD Supply Current per

Input per MHz(4)

VCC = Max.,

I and Y Pins Open

BE = GND

Control Input Toggling

50% Duty Cycle

0.25 mA/

MHz

Notes:

1. For Max. or Min. conditions, use appropriate value speciﬁ ed 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); I and Y 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 speciﬁ ed frequency. The I

and Y inputs generate no signiﬁ cant AC or DC currents as they transition. This parameter is not tested, but is guaranteed by design.

Notes:

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

2. 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.

09-0005

PI5C3257

Quad 2:1 Mux/DeMux Bus Switch

4PS7018I 11/16/09

.189

.197

.053

.069

.004

.010

SEATING

PLANE

.025

BSC

.007

.010

.228

.244

.150

.157

X.XX

X.XX DENOTES DIMENSIONS IN MILLIMETERS

0.635

4.80

5.00

1.35

1.75

5.79

6.19

0.101

0.254

.008

.012

0.203

0.305

3.81

3.99

0.178

0.254

0.38

.008

0.203

.015 x 45°

REF

Detail A

.008

0.20

MIN.

Guage Plane

.010

0.254

.041

1.04

REF

.016

.035

0.41

0.89

0˚-6˚

.008

.013

0.20

0.33

DESCRIPTION: 16-Pin 150-Mil Wide QSOP

PACKAGE CODE: Q

DOCUMENT CONTROL NO.

PD - 1201

REVISION: G

DATE: 11/07/07

Note:

1) Controlling dimensions in inches.

2) Ref: JEDEC MO-137B/AB.

3) Dimensions do not include mold flash, protrusions or gate burrs

Pericom Semiconductor Corporation

3545 N. 1st Street, San Jose, CA 95134

1-800-435-2335 • www.pericom.com

SEATING PLANE

.050

BSC

0-8˚

.149

.157

X.XX

X.XX DENOTES DIMENSIONS

IN MILLIMETERS

3.78

3.99

.386

.393

9.80

10.00

1.27

.053

.068 1.35

1.75

.2284

.2440

5.80

6.20

.0040

.0098 0.10

0.25

.013

.020

.0155

.0260

0.330

0.508

0.393

0.660

.0075

.0098

0.25

0.50

.0099

.0196 x 45˚

0.19

0.25

.016

.050

0.41

1.27

REF

DESCRIPTION: 16-Pin, 150-Mil Wide, SOIC

PACKAGE CODE: W

DOCUMENT CONTROL NO.

PD - 1004

REVISION: E

DATE: 03/09/05

Notes:

1) Controlling dimensions in millimeters.

2) Ref: JEDEC MS-012D/AC

Pericom Semiconductor Corporation

3545 N. 1st Street, San Jose, CA 95134

1-800-435-2335 • www.pericom.com

09-0005

PI5C3257

Quad 2:1 Mux/DeMux Bus Switch

5PS7018I 11/16/09

DESCRIPTION: 16-Pin, 173-Mil Wide, TSSOP

PACKAGE CODE: L

DOCUMENT CONTROL NO.

PD - 1310

REVISION: E

DATE: 03/09/05

Note:

1. Package Outline Exclusive of Mold Flash and Metal Burr

2. Controlling dimentions in millimeters

3. Ref: JEDEC MO-153F/AB

Pericom Semiconductor Corporation

3545 N. 1st Street, San Jose, CA 95134

1-800-435-2335 • www.pericom.com

.193

.201

.047

max.

.002

.006

SEATING

PLANE

.0256

BSC

.018

.030

.004

.008

.252

BSC

.169

.177

0.05

0.15

6.4

0.45

0.75

0.09

0.20

4.3

4.5

1.20

4.9

5.1

0.65 0.19

0.30

.007

.012

Ordering Information

Ordering Code Packaging Code Package Description

PI5C3257QEX Q Pb-free & Green, 16-pin 150-mil wide plastic QSOP

PI5C3257WEX W Pb-free & Green, 16-pin 150-mil wide plastic SOIC

PI5C3257LEX L Pb-free & Green, 16-pin 173-mil wide plastic TSSOP

Notes:

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

• E = Pb-free & Green

• Adding an X sufﬁ x = Tape/Reel

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

Note:

• For latest package info, please check: http://www.pericom.com/products/packaging/mechanicals.php

09-0005