PI3L720 datasheet(4/10 Pages) PERICOM

4 / 10 page

PS8961D

12/10/12

PI3L720

2:1 Mux/DeMux Gigabit Ethenet

LAN Switch with Power-down Mode

Power Supply Characteristics

Parameters

Description

Test Conditions(1)

Min.

Typ.(2) Max. Units

IDD-Standby(3) Quiescent Power Supply Current VDD = Max., VIN = GND or VDD

—

0.3

0.5

IDD-Active(3)

Active Power Supply Current

VDD = Max., VIN = VDD or GND

1.0

1.5

IDD-PD(3)

Power Down Current

PD = 1, VDD = MAX, VIN = VDD or GND

0.15

0.25

Notes:

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

2. Typical values are at VDD = 3.3V, TA = 25°C ambient and maximum loading.

3. Measured by the voltage drop between A and B pins 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.

Capacitance(TA = –40°C to +85°C, VDD = 3.3V ±10%)

Parameters(4)

Description

Test Conditions(1)

Min. Typ.

Max.

Units

CIN

Input Capacitance

VIN = 0V, f = 1MHz

2.0

3.0

COFF(B1, B2)

Port B Capacitance, Switch OFF

3.0

6.0

CON(A/B)

A/B Capacitance, Switch ON

8.0

11.0

Notes:

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

2. Typical values are at VDD = 3.3V, TA = 25°C ambient and maximum loading..

3. Active power represents normal data communication. Standby power is when the device is enabled for operation but there is no LAN traffic

(cable not connected). Power down current is the minimum power state used when not connected and mobile.

4. 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 10pF 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 interactions with the load on the driven side.

Dynamic Electrical Characteristics Over the Operating Range (TA = –40°C to +85°C, VDD = 3.3V ±10%)

Parameter

Description

Test Conditions(1)

Min.

Typ.(2) Max. Units

XTALK

Crosstalk(3)

RL = 100-Ohm, f = 250MHz

—

–75

—

OIRR

OFF Isolation(3)

—

–35

—

Bandwidth –3dB(3)

RL = 100-Ohm

—

650

—

MHz

Notes:

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

2. Typical values are at VDD = 3.3V, TA = 25°C ambient and maximum loading..

3. Guaranteed by design.

4. 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 10pF 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 interactions with the load on the driven side.

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