Datasheet PI3C3245L, PI3C3245Q Datasheet (PERICOM)

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2

PI3C3245

2.5V/3.3V, High Bandwidth, Hot Insertion
8-Bit, 2-Port, Bus Switch

Product Features

 Near zero propagation delay
5Ω switches connect inputs to outputs
 High Bandwidth Operation (>400 MHz)
 Permits Hot Insertion
 5V I/O Tolerant
 Rail-to-Rail 3.3V or 2.5V Switching
 2.5V Supply Voltage Operation
 Packages available:

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

Product Description

Pericom Semiconductors PI3C series of logic circuits are produced
using the Companys advanced submicron CMOS technology,
achieving industry leading performance.

The PI3C3245 is a 2.5V or 3.3V 8-bit, 2-port bus switch designed
with a low ON resistance (5Ω) 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. It is very useful in switching
signals that have high bandwidth (>400 MHz).

Logic Block Diagram

A0

A7

BE

Truth Table

Function BE A07

Disconnect H Hi-Z
Connect L B07

Note:

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

(1)

B0

B7

Product Pin Configuration

NC 1 20

20-Pin

L,Q

V
BEA0 2 19
B0A1 3 18
B1A2 4 17
B2A3 5 16
B3A4 6 15
B4A5 7 14
B5A6 8 13
B6A7 9 12
B7GND 10 11

Product Pin Description

Pin Name Description

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

CC

Power

CC

1

PS8162B 12/10/99

Maximum Ratings

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

PI3C3245

2.5V/3.3V, High Bandwidth,

Hot Insertion, 8-Bit, 2-Port, Bus Switch

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 +5.5V

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

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

DC Electrical Characteristics (Over Operating Range, T

Parameters Description Test Conditions

V
V
I

IH

I

IL

I

OZH

V
R

IH
IL

IK
ON

Input HIGH Voltage Guaranteed Logic HIGH Level 2.0
Input LOW Voltage Guaranteed Logic LOW Level –0.5 0.8
Input HIGH Current VCC = Max., VIN = V
Input LOW Current VCC = Max., VIN = GND ±1 µA
High Impedance Output Current 0 ≤ A, B ≤ V
Clamp Diode Voltage VCC = Min., IIN = –18m A –0.73 –1.2 V
Switch On Resistance

(4)

VCC = Min., VIN = 0.0V, ION = 48mA 5 7 Ω

= –40°C to +85°C, VCC = 3.3V ±10%)

A

(1)

CC

CC

VCC = Min., VIN = 2.4V, ION = 15mA 8 15

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.

Min. Typ.

(2)

Max. Units

V

±1

±1

Capacitance (T

Parameters

C

IN

C

OFF

C

ON

(5)

= 25°C, f = 1 MHz)

A

Description Test Conditions Typ. Units

Input Capacitance VIN = 0V 3.5
A/B Capacitance, Switch Off VIN = 0V 5.0 pF

A/B Capacitance, Switch On VIN = 0V 10.0

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

PS8162B 12/10/99

Power Supply Characteristics

Parameters Description Test Conditions

(1)

PI3C3245

2.5V/3.3V, High Bandwidth,

Hot Insertion, 8-Bit, 2-Port, Bus Switch

Min. Typ.

(2)

Max. Units

I

CC

Quiescent Power VCC = Max. VIN = GND or V

CC

260 500

Supply Current

∆I

CC

Supply Current per VCC = Max. VIN = 3.0V

(3)

750

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

Switching Characteristics over 3.3V Operating Range

PI3C3245

Com.

Parameters Description Conditions

t

PLH

t

PHL

t

PZH

t

PZL

t

PHZ

t

PLZ

Propagation Delay
Ax to Bx RL = 500Ω
Bus Enable Time 1.5 6.5 ns
BE to Ax or Bx CL = 50pF,
Bus Disable Time RL = 500Ω, 1.5 5.5
BE to Ax or Bx R = 500Ω

(2,3)

CL = 50pF, 0.25

(1)

Min. Max. Units

Switching Characteristics over 2.5V Operating Range

PI3C3245

Com.

Parameters Description Conditions

t

PLH

t

PHL

t

PZH

t

PZL

t

PHZ

t

PLZ

Propagation Delay
Ax to Bx RL = 500Ω
Bus Enable Time 1. 5 9. 8 ns
BE to Ax or Bx CL = 50pF,
Bus Disable Time RL = 500Ω, 1.5 8.3
BE to Ax or Bx R = 500Ω

(2,3)

CL = 50pF, 0.25

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.

(1)

Min. Max. Units

µA

3

PS8162B 12/10/99

PI3C3245

2.5V/3.3V, High Bandwidth,

Hot Insertion, 8-Bit, 2-Port, Bus Switch

, (V)

2.0

4.0

VCC = 3.3V

OUT

V

0.0

0.0

1.0 2.0

3.0 4.0 5.0

VIN, (V)

Output Voltage vs. Input Voltage over Various Supply Voltages

Output Voltage vs. Input Voltage over Various Supply Voltages

3.1V

2.9V

2.7V

2.5V

2.3V

3.8V

3.6V

3.4V

3.2V

3.0V

2.8V

Ordering Information

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Q5423C3IP)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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PS8162B 12/10/99