IDT77V126L200 Datasheet, PDF (1/30 Pages) Integrated Device Technology – Single Port PHY (Physical Layer) for 25.6, 51.2, and 204.8 Mbps ATM Networks and Backplane Applications

Single Port PHY (Physical Layer)
for 25.6, 51.2, and 204.8 Mbps
ATM Networks and Backplane
Applications
IDT77V126L200
Features
! _{Performs the PHY-Transmission Convergence (TC) and}
Physical Media Dependent (PMD) Sublayer functions of the
Physical Layer
! _{Compliant to ATM Forum (af-phy-040.000) and ITU-T I.432.5}
specifications for 25.6 Mbps physical interface
! _{Operates at 25.6, 51.2, 102.4, 204.8 Mbps data rates}
! _{Backwards Compatible with 77V106L25}
! _{8-bit UTOPIA Level 1 Interface}
! _{3-Cell Transmit & Receive FIFOs}
! _{Receiver Auto-Synchronization and Good Signal Indication}
! _{LED Interface for status signalling}
! _{Supports UTP Category 3 and 5 physical media}
! _{Interfaces to standard magnetics}
! _{Low-Power CMOS}
! _{3.3V supply with 5V tolerant inputs}
! _{64-lead TQFP Package (10 x 10 mm)}
! _{Industrial Temperature Ranges}
Description
The IDT77V126L200 is a member of IDT's family of products
supporting Asynchronous Transfer Mode (ATM) data communications
and networking. The IDT77V126L200 implements the physical layer for
25.6 Mbps ATM, connecting a serial copper link (UTP Category 3 and 5)
to an ATM layer device such as a SAR or a switch ASIC. The
IDT77V126L200 also operates at 51.2 and 204.8 Mbps and is well
suited to backplane driving applications. The 77V126L200 utilizes an 8-
bit UTOPIA1 interface on the cell side.
The IDT77V126L200 is fabricated using IDT's state-of-the-artCMOS
technology, providing the highest levels of integration, performance and
reliability, with the low-power consumption characteristics of CMOS.
Applications
! _{Up to 204.8Mbps backplane transmission}
! _{Rack-to-rack short links}
! _{ATM Switches}
Block Diagram
TXREF
TXCLK
TXDATA ⁹
TXSOC
TXEN
TXCLAV
TXLED
3 CELL FIFO
SCRAMBLER
Pseudo Random
Nibble Gener-
atorPRNG
4B/5B
ENCODER
P/S
NRZI
Line
Driver
TXD+
TXD-
ALE
WR
RD
CS
AD[7:0] ⁸
INT
RESET
UTILITY
BUS
CONTROLLER
RESET
LOOP BACK
RXCLK
RXDATA ⁹
RXSOC
RXEN
RXCLAV
RXREF
3 CELL FIFO
DESCRAMBLER
5B/4B
DECODER
S/P
DNRZI
CLK
REC
77V106 ^77V126
RxLED
IDT and the IDT logo are registered trademarks of Integrated Device Technology, Inc..
1 of 30
 2004 Integrated Device Technology, Inc. All rights reserved. Product specification subject to change without notice.
Line
RXVR
RXD+
RXD-
OSC
December 2004
DSC 6030/1