DP83222 datasheet(5/12 Pages) NSC

5 / 12 page

20 Pin Table

TABLE I Pinout Summary

Signal

Pin No

Description

Type

VCC

7 16 28

VCC

Supply

GND

1 4 11 15

GND

Supply Return

ECLVCC

Supply

ECLGND

Supply Return

EXTVCC

External VCC

Supply

RXDg

3 2

Received Data from PMD Receiver

Diff 100K ECL In

RXCg

5 6

125 MHz Clock from Receiver PLL

Diff 100K ECL In

TXDg

18 17

Transmit Data from PHY PMRD

Diff 100K ECL In

TXCg

13 14

125 MHz Clock from PHY

Diff 100K ECL In

SCOg

19 20

Scrambled Data to PMD Transmitter

Diff ECL Out

DSCOg

27 26

Descrambled Data to PHY

Diff ECL Out

RXCOg

24 25

Realigned 125 MHz Clock to PHY

Diff ECL Out

ENC0

Encode 0

TTL Compatible CMOS In

ENC1

Encode 1

TTL Compatible CMOS In

Clock Detect Input from Receive PLL

TTL Compatible CMOS In

Signal Detect Input from PMD Receiver

Single-Ended ECL ln

30 Pin Definitions and Connection Diagrams

28-Pin PLCC

TLF11885 – 4

FIGURE 5 DP83222 Pinout

VCC (7 16 28)

Positive power supply for all internal

CMOS circuitry

The Stream Cipher

ScramblerDescrambler operates from

a single a5V DC power supply

GND (1 4 11 15)

Return path for internal CMOS circuitry

power supply

ECLVCC (21)

Positive power supply for all internal

ECL circuitry This power supply is in-

tentionally separated from others to re-

duce coupled supply noise

ECLGND (22)

Return path for all internal ECL circuit-

ry This Power supply return is inten-

tionally separated from others to re-

duce coupled supply noise

EXTVCC (23)

Positive power supply for emitter fol-

lower output circuitry

RXDg (3 2)

Differential 100K ECL data inputs

These inputs receive the ECL signals

generated by the National Semicon-

ductor DP83231 Clock Recovery De-

vice (CRDTM) or the DP832567VF-AP

Enhanced

Physical

Layer

Devices

(PLAYERaTM)

RXCg (5 6)

Differential 100K ECL clock inputs

These inputs receive the 125 MHz

clock regenerated by the National

Semiconductor DP83231 Clock Re-

covery Device (CRD) the DP83257VF

the

DP83256VF-AP

Enhanced

Physical Layer Devices (PLAYERa)

DP83222 Datasheet(PDF) 5 Page - National Semiconductor (TI)

DP83222 Datasheet(HTML) 5 Page - National Semiconductor (TI)

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