VSC8228

FEA TURES:

Ethernet and Fibre Channel Applications

Repeater, Retimer, or Bypassed

De-emphasis, and Output Drive Levels

Clock Output

Unframed 2^7, 2^23, and 2^31 Pseudorandom Bit

Stream (PRBS), a User Defined Pattern, and the Fibre

Channel CRPAT, CJTPAT, and CSPAT Patterns

APPLICA TIONS:

Host Bus Adapters

SPECIFICA TIONS:

Dual Channel Multirate Signal Conditioner and Retimer

BENEFITS:

the Signal Integrity

Jitter Generation, While Maintaining High Jitter Tolerance. In Repeater

Mode Offers Low Latency Signal Cleanup. Bypass Mode Allows Support

for Rates in not Directly by the CDR.

Ideal for Backplane and Rack-to-rack Applications

Pattern Support Reduces the Need for External test Equipment

BLOCK DIAGRAM:

TRANSPORT PRODUCTS

PB-VSC8228-001

Serial Interface

and

Control Logic

REFCLK

VSC8228

LOS and

Protocol Error

Logic

LOS and

Protocol Error

Logic

CDR

with

Retimer

CDR

with

Retimer

PIO0, M0, MOSI, SDA

PIO1, M1, SCK

PIO2, RESET, MISO

PIO3, SSN

PIO4

PIO5, M2

PIO6, M3

RXRATE0

RXRATE1

RXRP

APPSEL

RXINP

RXINN

RXCLKP

RXCLKN

TXINP

TXINN

TXASD

TXSDU

TXRATE0

TXRATE1

TXRP

RXOUTP

RXOUTN

RXASD

RXSDU

RXASD

RXSDU

TXOUTP

TXOUTN

RXEMP

EXOEN