PI3L720ZFE Pericom Semiconductor, PI3L720ZFE Datasheet

PI3L720ZFE

Manufacturer Part Number

PI3L720ZFE

Description

2:1 MUX/DEMUX GIGABIT ETHERNET LAN SWITCH WITH POWER-DOWN MO

Manufacturer

Pericom Semiconductor

Datasheet

1.PI3L720.pdf (10 pages)

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Features

• 1:2 Gigabit LAN Switch

• Power-down support

• Low bit-to-bit skew: 200ps

• Very Low Crosstalk: –75dB @ 250MHz

• Status Indicator LEDs Switched with Ethernet pairs

• V

• Enhanced ESD Protection (on A, B, C, LED pins):

• >650 MHz bandwidth

• Packaging:

Block Diagram

– 8kV (contact)

– 1.0kV (machine model),

– 56-contact TQFN (5 x 11mm, 0.5 pitch)

– 42-contact TQFN (3.5 x 9mm, 0.5 pitch)

– 42-contact TQFN (3.5 x 7mm, 0.4 pitch)

11kV (human body model)

LED

SEL

Operating Range: +3.0V to +3.6V

08-0322

A0+

A0-

A3+

A3-

(1)

POWER

DOWN

LED

B0+

B0-

C0+

C0-

B3+

B3-

C3+

C3-

Description

The PI3L720 is a 8-Channel 2:1 multiplexer/demultiplexer LAN

Switch with Hi-Z outputs. Industry leading advantages include a

propagation delay of less than 250ps, resulting from its low channel

resistance and I/O capacitance. The device multiplexes differential

outputs from a Gigabit Ethernet transceiver (PHY) device to one

of two corresponding B or C outputs. The switch is bidirectional

and offers little or no attenuation of the high-speed signals at the

outputs. It is designed for low bit-to-bit skew, high channel-to-

channel noise isolation and is compatible with various standards,

such as 10/100/1000 Base-T (Ethernet).

The PI3L720 provides a Power Down input (PD), which can put

the device into standby mode (PD=1) while mobile, eliminating

an external power switch.

Generally, this part can be used to replace mechanical relays in

low-voltage LAN applications that interface a physical layer over

CAT 5 or CAT 6 unshielded twisted pair cable through an isolation

transformer.

Applications

• Dual Physical Layer Device sharing to one interface

• Routes signals for 10/100/1000 Mbit Ethernet

Truth Table

Note:

1. IEC 6100-4-2

connector, or one controller to dual connectors for docking

LAN Switch with Power-down Mode

2:1 Mux/DeMux Gigabit Ethernet

SEL

to B

to C

; LEDA

Function

; LEA

Hi-Z

PS8961D

to LEDC

to LEDB

PI3L720

12/11/08

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