1

PS8719A

03/01/05

Features

• Low bit-to-bit skew: 200ps

• Low Crosstalk: –22dB @ 250MHz

• Near-Zero propagation delay: 250ps

• Switching speed: 9ns

• Channel On capacitance: 10pF (typical)

• Live Insertion Capable

• Status Indicator LEDs Switched with Ethernet pairs

• ESD>3000V . . . Human Body Model

• >350 MHz bandwidth (or data frequency)

• Packaging:

· Pb-free and Green 56-contact TQFN (ZF)

· 56-contact TQFN (ZF)

Applications

• Dual Physical Layer Device sharing to one interface

connector

• Routes signals for 10/100/1000 Mbit Ethernet

Description

PericomSemiconductor’sPI3Lseriesofswitchcircuitsareproduced

using the Company’s advanced sub-micron CMOS technology,

achieving industry leading performance.

ThePI3L500isa16-to8-Channelmultiplexer/demultiplexerLAN

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 B1 or B2 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).

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.

Block Diagram

Pin Description

PI3L500

3.3V, 8-Channel, 2:1 Mux/DeMux

Gigabit Ethernet LAN Switch with Single Enable

GND

N.C.

GND

GND

GND

GND

SEL

GND

GND

GND

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

48

47

46

45

44

43

42

41

40

39

38

37

36

35

34

33

32

31

30

29

SEL