Datasheet PI3VT3245L, PI3VT3245Q Datasheet (PERICOM)

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PI3VT3245

8-Bit, 2-Port, Low Voltage

Translator Bus Switch

Product Features

 Near zero propagation delay
 Low ON resistance switches connect inputs to outputs
 2.5V Supply Voltage Operation
 2.5V or 1.8V switching
 Packages available:

 20-pin, 150 mil wide plastic QSOP (Q)
 20-pin, 173 mil wide plastic TSSOP (L)

Applications

 3.3V to 2.5V level shifting (voltage translation)
 2.5V to 1.8V level shifting (voltage translation)

Logic Block Diagram

A0

A7

BE

B0

B7

Product Description

Pericom Semiconductors PI3VT series of logic circuits are produced
using the Companys advanced submicron CMOS technology,
achieving industry leading performance.

The PI3VT3245 is a 2.5V or 3.3V 8-bit, 2-port bus switch designed
with a low ON resistance (5 ohms). The switches are turned ON or
enabled by the Bus Enable (BE) input signal.

Given a 3.3V supply and an input voltage of 3.3V, the switch
translates to an output voltage of 2.5V. Similarly, when operated with
a 2.5V supply and given 2.5V inputs, the device translates the
outputs to 1.8V.

Product Pin Configuration

20
19
18
17
16
15
14
13
12
11

V
BE

B0
B1
B2
B3
B4
B5
B6
B7

CC

NC 1

A0
A1
A2
A3
A4
A5
A6
A7

GND

2
3
4
5
6
7
8
9
10

20-Pin

L,Q

Truth Table

Notes:

1. H = High Voltage Level
L = Low Voltage Level
Hi-Z = High Impedance

(1)

noitcnuFEB7-0A

tcennocsiDHZ-iH

tcennoCL 7-0B

Product Pin Description

emaNniPnoitpircseD

EB)woLevitcA(tupnIelbanEsuB

7A-0AAsuB

7B-0BBsuB

V

CC

DNGdnuorG

1

rewoP

PS8530 03/19/01

Maximum Ratings

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

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

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

Supply Voltage to Ground Potential .........................................0.5V to +4.6V

DC Input Voltage .................................................................. 0.5V to +5.5V

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

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

PI3VT3245

8-Bit, 2-Port, Low Voltage

Translator Bus Switch

Note:

Stresses greater than those listed under 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.

DC Electrical Characteristics (Over Operating Range, T

sretemaraPnoitpircseDsnoitidnoCtseT

V

HI

V

LI

I

HI

LI

I

HZO

R

NO

V

P

Capacitance (T

)5(

sretemaraP

= 25°C, f = 1 MHz)

A

egatloVHGIHtupnIleveLHGIHcigoLdeetnarauG8.1V

egatloVWOLtupnIleveLWOLcigoLdeetnarauG5.08.0

tnerruCHGIHtupnIV

tnerruCWOLtupnIV

CC

CC

tnerruCtuptuOecnadepmIhgiH0≤ B,A ≤ V

V

CC

V

CC

ecnatsiseRnOhctiwS

V

CC

V

CC

V=

V

NI

CC

egatloVssaP

V

V=

NI

CC

noitpircseDsnoitidnoCtseT.pyTstinU

= 40°C to +85°C, VCC = 3.3V ±10%)

A

)1(

V,.xaM=

V=

NI

V,.xaM=

NI

CC

V,.niM=

NI

V,.niM=

NI

V,V3.2=

NI

V,V3.2=

NI

CC

DNG=1±

I,V0.0=

I,V7.1=

I,V0.0=

I,V3.1=

I,V3.3=

TUO

I,V5.2=

TUO

Am8=58

NO

Am8=0122

NO

Am8=69

NO

Am8=5203

NO

Aµ5=3.25.29.2

Aµ5=8.1

.niM.pyT

)2(

CC

.xaMstinU

V3.0+

V

1±

AµI

1±

Ω

V

C

NI

FFO

C

NO

ecnaticapaCtupnI

ffOhctiwS,ecnaticapaCB/A 0.5

V

V0=

NI

nOhctiwS,ecnaticapaCB/A 0.01

5.3

Notes:

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

2. Typical values are at VCC = 3.3V, 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.

2

PS8530 03/19/01

FpC

Power Supply Characteristics

sretemaraPnoitpircseDsnoitidnoCtseT

PI3VT3245

8-Bit, 2-Port, Low Voltage

Translator Bus Switch

)1(

.niM.pyT

)2(

.xaMstinU

rewoPtnecseiuQ

tnerruCylppuS

V

tnerruCtnecseiuQ

CC

HGIHtupnIrep

V

NI

VroDNG=

CC

3

.xaM=

V

NI=

)3(

V3

05

∆I

I

CC

CC

Notes:

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

2. Typical values are at VCC = 3.3V, +25°C ambient.

3. Per driven input (control input only); A and B pins do not contribute to ∆I

CC

.

Switching Characteristics over 3.3V ±0.3V Operating Range

sretemaraPnoitpircseDnoitidnoC

)3,2(

t

HLP

t

LHP

t

HZP

t

LZP

t

ZHP

t

ZLP

xBotxA

yaleDnoitagaporP

emiTelbanEsuB

xBroxAotEB

emiTelbasiDsuB

xBroxAotEB

)1(

C

L

R

L

C

L

R

L

,Fp05=

smho005=

,Fp05=

smho005=

smho005=R

moC

.niM.xaM

52.0

5.18.9

5.13.8

Aµ

stinU

sn

Switching Characteristics over 2.5V ±0.2V Operating Range

sretemaraPnoitpircseDnoitidnoC

)3,2(

t

HLP

t

LHP

t

HZP

t

LZP

t

ZHP

t

ZLP

xBotxA

yaleDnoitagaporP

emiTelbanEsuB

xBroxAotEB

emiTelbasiDsuB

xBroxAotEB

C

L

R

L

C

L

R

L

,Fp05=

,Fp05=

)1(

smho005=

smho005=

smho005=R

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.

moC

.niM.xaM

52.0

5.18.9

5.13.8

stinU

sn

3

PS8530 03/19/01

20-pin QSOP package (Q20)

20

.150

3.81

.157

3.99

1

8.56

.337
.344

8.74

.058

.025
BSC

0.635

1.47

REF

.008
.012

0.203

0.305

.053
.069

.004
.010

1.35

1.75

0.101

0.254

SEATING
PLANE

.015 x 45˚

0.38

0.41

.016

1.27

.050

.228
.244

5.79

6.19

X.XX

DENOTES DIMENSIONS

X.XX

IN MILLIMETERS

.007
.010

0.178

0.254

PI3VT3245

8-Bit, 2-Port, Low Voltage

Translator Bus Switch

20-pin TSSOP package (L20)

20

.169

4.3

.177

4.5

1

.252
.260

6.4

.0256

BSC

0.65

6.6

.007
.012

0.19

0.30

.002
.006

.047

1.20

Max

0.05

0.15

Ordering Information

traPegakcaP-niPerutarepmeT

SEATING
PLANE

X.XX

DENOTES CONTROLLING

X.XX

DIMENSIONS IN MILLIMETERS

0.45

0.75
.238

.269

6.1

6.7

.018
.030

.004
.008

0.09

0.20

L5423TV3IP)L(POSST-02Cº58+otCº04

Q5423TV3IP)Q(POSQ-02Cº58+otCº04

Pericom Semiconductor Corporation

2380 Bering Drive • San Jose, CA 95131 • 1-800-435-2336 • Fax [phone] • http://www.pericom.com

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PS8530 03/19/01