Datasheet PI3B3245L, PI3B3245Q Datasheet (PERICOM)

Page 1

PI3B3245

12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012

3.3V, Hot Insertion

8-Bit, 2-Port, BusSwitch

Product Features

 Near zero propagation delay  5 Ohm switches connect inputs to outputs  Fast Switching Speed - 4.5ns max.  Permits Hot Insertion  Ultra Low Quiescent Power (0.2µA Typical)

 Ideally suited for notebook applications  TTL-compatible control of inputs levels  Packages available:

 20-pin 150 mil wide plastic QSOP (Q)

 20-pin 173 mil wide plastic TSSOP (L)

Logic Block Diagram

Product Description

Pericom Semiconductors PI3B series of logic circuits are produced using the Companys advanced sub micron CMOS technology, achieving industry leading performance.

The PI3B3245 is a 3.3V 8-bit, 2-port bus switch designed with a low ON resistance (5 Ohm) allowing inputs to be connected directly to outputs. The bus switch creates no additional propagational delay or additional ground bounce noise. The switches are turned ON by the Bus Enable (BE) input signal.

Product Pin Configuration

VCCNC 1 20 BEA0 219 B0A1 318 B1A2 417

20-Pin

Q,L

B2A3 516 B3A4 615 B4A5 714 B5A6 813 B6A7 912 B7GND 10 11

Truth Table

Function BE A0–7

Disconnect H Hi-Z Connect L B0–7

Notes:

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

(1)

Product Pin Description

Pin Name Description

BE Bus Enable Input (Active LOW) A07 Bus A B07 Bus B GND Ground V

Power

PS8162D 01/05/00

Page 2

12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012

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 (Inputs & VCC Only) ............... 0.5V to +4.6V

Supply Voltage to Ground Potential (Outputs & D/O Only ............. 0.5V to +4.6V

DC Input Voltage .............................................................................. 0.5V to +4.6V

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

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

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.

PI3B3245

3.3V, Hot Insertion

8-Bit, 2-Port, BusSwitch

DC Electrical Characteristics (Over the Operating Range, T

Parameters Description Test Conditions

V V I

OZH

V R

IH IL

IK ON

Input HIGH Voltage Guaranteed Logic HIGH Level 2.0 V Input LOW Voltage Guaranteed Logic LOW Level –0.5 0.8 V Input HIGH Current VCC = Max., V Input LOW Current V

= Max., VIN = GND ±1 µA

High Impedance Output Current 0 ≤ IN, YN ≤ VCC ±1 µA Clamp Diode Voltage VCC = Min., IIN = –18mA –1.2 V Switch On Resistance

(3)

VCC = Min., VIN = 0.0V, ION = 48mA or 64mA 5 8 Ω

= –40°C to +85°C, VCC =3.3V ±10%)

(1)

= V

Min. T yp

(2)

Max. Units

±1 µA

VCC = Min., VIN = 2.4V,ION = 1 5 m A 10 17

Capacitance (T

Parameters

OFF

= 25°C, f = 1 MHz)

(4)

Description Test Conditions Typ. Units

Input Capacitance VIN = 0V 3.0 pF A/B Capacitance, Switch Off V

A/B Capacitance, Switch On VIN = 0V 16.0 pF

= 0V 8.0 pF

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. Measured by the voltage drop betweenAand B pin at indicated current through the switch. ON resistance is determined

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

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

PS8162D 01/05/00

Page 3

1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012

Power Supply Characteristics

Parameters Description Test Conditions

(1)

PI3B3245

3.3V, Hot Insertion

8-Bit, 2-Port, BusSwitch

Min. Typ

(2)

Max. Units

Quiescent Power VCC = Max. VIN = GND or V

0.1 3.0 µA

Supply Current

∆I

Supply Current per VCC = Max. VIN = 3.0V

(3)

Input HIGH

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 TTL driven input (control input only); A and B pins do not contribute to ICC.

Switching Characteristics over Operating Range

PI3B3245

Parameters Description Conditions

t t t t t t

PLH PHL PZH PZL PHZ PLZ

Propagation Delay Ax to Bx, Bx to Ax RL = 500Ω Bus Enable Time CL = 50pF, BE to Ax or Bx RL = 500Ω, Bus Disable Time RL = 500Ω BE to Ax or Bx

(2,3)

CL = 50pF

(1)

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.

Com.

Min. Max. Units

0.25 ns

1.0 4.0 ns

1.0 4.5 ns

750 µA

Ordering Information

traPegakcaPniPerutarepmeT

Q5423B3IP)Q(POSQ-02C°58+otC°04

L5423B3IP)L(POSST-02C°58+otC°04

Pericom Semiconductor Corporation

2380 Bering Drive • San Jose, CA 95131 • 1-800-435-2336 • Fax (408) 435-1100 • http://www.pericom.com

PS8162D 01/05/00