PHY (TC-PMD) USER NETWORK
INTERFACE FOR 155 MBPS ATM
NETWORK APPLICATIONS
Integrated Device Technology, Inc.
ADVANCED
INFORMATION
IDT77155
KEY FEATURES
鈥?One chip ATM User Network Interface for 155.52 Mbps/
51.84Mbps operating speed.
鈥?Full implementation of the SONET/SDH criteria according
to Bellcore GR-253-CORE and ITU-T G.709, G.783.
鈥?Full implementation of the ATM physical layer according
to CCITT I.432 and ATM Forum User Network Interface
Specification.
鈥?Full-duplex 155.52 Mbps STS-3c/STM-1 or 51.84 Mbps
STS-1 data with built-in clock/data recovery and clock
synthesis.
鈥?Supports 4-cell PHY FIFO buffers for both transmit and
receive directions with parity.
鈥?Provides GFC bits insertion and extraction.
鈥?UTOPIA Level 1 and Level 2 Interface.
SYSTEM-LEVEL FUNCTIONAL BLOCK DIAGRAM
鈥?Supports up to 4 PHYs for Multi-PHY connections with 2-
bit address and 8-bit data using UTOPIA 2 protocol.
鈥?Provides an 8-bit microprocessor bus interface for
configuration, control and monitoring.
鈥?Low power CMOS
鈥?128 pin PQFP Package (14 mm x 20 mm).
DESCRIPTION
The IDT77155 is a member of IDT's SWITCHStAR
鈩?/div>
family
of products for Asynchronous Transfer Mode (ATM) net-
works.
The IDT77155 is a integrated circuit that provides the
SONET/SDH processing and ATM mapping functions of a
155 Mbps/51 Mbps ATM User Network Interface. Provides full
compliance with SONET/SDH requirements and ATM Forum
RATE1
RATE0
XOFF
TGFC
TCP
TFPO
ATP2
TBYP
TCLK
TRCLK-
TFCLK
timsnarT
MTA
lleC
OFIF
TXPRTY
TDAT[7:0]
TSOC
TCA
TxADDR[1:0]
MPHYEN
RxADDR[1:0]
TSEN
RFCLK
RXPRTY
RDAT[7:0]
RSOC
RCA
Transmit
UTOPIA
Cell
FIFO
Transmit
SONET
Framer
Parallel
to
Serial
Clk Gen.
TRCLK+
TXC-
TXC+
redocnE
RBYP
Encoder
TXD+
TXD-
RXDO-
RXD-
Receive
UTOPIA
Cell
FIFO
Decoder
Receive
SONET
Framer
Serial
to
Parallel
Clk Rec.
Micoprocessor
Interface
.ceR klC
RXD+
RXDO+
RRCLK-
RRCLK+
ALOS-
ALOS+
RCP
RGFC
RALM
ALE
A[7:0]
D[7:0]
RCLK
LFO
LF鈥?/div>
LF+
APT1
RFP
3497 drw 01
NICStAR is a trademark and the IDT logo is a registered trademark of Integrated Device Technology, Inc.
COMMERCIAL TEMPERATURE RANGE
漏1996 Integrated Device Technology, Inc.
NOVEMBER 1996
DSC-2066/5
8.03
1
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