Datasheet PI3B16210, PI3B162210 Datasheet (PERICOM)

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PI3B16210

PI3B162210 (25

ΩΩ

Ω)

ΩΩ

3.3V, Hot Insertion 20-Bit, 2-Port BusSwitch

Product Features

• Near-zero propagation delay

•5Ω or 25Ω switches connect inputs to outputs

• Fair Switching Speed - 4.5ns max.

• 32X384 function with flow through pinout make board layout easier

• Permits Hot Insertion.

• Vcc Operating Range: 3.0V to 3.6V

• Industrial operating temperature: –40°C to +85°C

• Packages available: – 48-pin 150-mil wide plastic QSOP (B)

– 48-pin 240-mil wide plastic TSSOP (A) – 48-pin 300-mil wide plastic SSOP (V)

Logic Block Diagram

Product Description

Pericom Semiconductor’s PI3B series of BusSwitch circuits are produced in the Company’s advanced 0.35 micron CMOS technology, achieving industry leading speed.

The PI3B16210 is configured as 3.3 volt 20-bit, 2-port bus switches 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 (xOE) input signal.

The PI3B162210 device has a built-in 25-ohm series resistor to reduce noise resulting from reflections, thus eliminating the need for an external terminating resistor.

Product Pin Configuration

1OE

2OE

Truth Table

EO1EO2B1,A1B2,A2 LL B1=A1B2=A2 LH B1=A1Z HL Z B2=A2 HH Z Z

(1)

stupnIstuptuO/stupnI

Note:

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

48-Pin

Product Pin Description

Pin Name Description

1OE, 2OE Bus Enable Inputs (Active LOW) 1A1-1A10, 2A1-2A10 Bus A 1B1 - 1B10, 2B1 - 2B10 Bus B

PS8193B 11/09/98

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3.3V, Hot Insertion, 20-Bit, 2-Port BusSwitch

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 .................................. –0°C to +85°C

Supply Voltage Range..................................................................–0.5V to +4.6V

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

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

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.

DC Electrical Characteristics (Over the Operating Range, TA = –40°C to +85°C, VCC = 3.0V to 3.6V)

PI3B16210/162210

Parameters Description 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 V II Input Current VCC = Max. VIN = VCC or GND — — ±1 µA

VCC = 0V, VIN = VCC ——±1µA

IOZH High Impedance Output Current 0 ≤ A, B ≤ VCC ——10µA VIK Clamp Diode Voltage VCC = Min, IIN = –18mA — –0.7 –1.2 V RON Switch On Resistance

(3)

VCC = 3V, VIN = 0.0V, 16210 — 5 8 Ω ION = 24 mA, 64mA 162210 20 28 40

VCC = 3V, VIN = 2.4V, 16210 — — 15 Ω ION = 15mA 162210 20 35 48

Capacitance (TA = 25°C, f = 1 MHz)

Parameters

COFF A/B Capacitance, Switch OFF VIN = 0V 8.5 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 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.

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

(4)

Description Test Conditions Typ Units

CIN Input Capacitance VIN = 0V 3.0

CON A/B Capacitance, Switch ON VIN = 5V 17.0

PS8193B 11/09/98

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PI3B16210/162210

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3.3V, Hot Insertion, 20-Bit, 2-Port BusSwitch

Power Supply Characteristics

Parameters Description Test Conditions

(1)

Min. Typ

ICC Quiescent Power VCC = Max. VIN = GND or VCC 10 µA

Supply Current

∆ICC Supply Current per VCC = Max. VIN = 3.0V

(3)

Input @ TTL HIGH

(2)

Max. Units

750 µA

ICCD Supply Current per VCC = Max. 0.25 mA/

Input per MHz

(4)

A and B Pins Open MHz BE = GND

Control Input Toggling 50% Duty Cycle

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 inputs only); A and B 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 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.

Switching Characteristics over Operating Range

Com.

Parameters Description Conditions

tPLH Propagation Delay tPHL Ax to Bx, Bx to Ax R tPZH Bus Enable Time 1 4.5 ns tPZL BE to Ax or Bx tPHZ Bus Disable Time 1 5.0 t

PLZ BE to Ax or Bx

(2,3)

CL = 50pF 16210 0.25

= 500Ω 162210 1.25

CL = 50pF,

= 500Ω,

R = 500Ω

Notes:

1. See test circuit and wave forms.

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

Pericom Semiconductor Corporation

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

PS8193B 11/09/98