®
PRELIMINARY
SEPE4C/SIFTICMA-T1I/OONC-3 ATM 4-BIT TRANSCEIVER
S3030B
S3030B
E4/STM-1/OC-3 ATM 4-BIT TRANSCEIVER
FEATURES
GENERAL DESCRIPTION
The S3030B transceiver chip is a fully integrated CMI
encoding transmitter and CMI decoding receiver. The
chip derives high speed timing and data signals for
SONET/SDH or PDH-based equipment. The circuit is
implementedusingAMCC’sprovenPhaseLockedLoop
(PLL) technology. Figure 1a and 1b show typical net-
work applications.
•
•
•
•
•
•
Complies with ANSI, Bellcore, and ITU-T
specifications
On-chip high-frequency PLLs for clock
generation and clock recovery
On-chip analog circuitry for transformer
driver and equalization
Supports 139.264 Mbps (E4) and 155.52
Mbps (OC-3) transmission rates
Supports 139.264 Mbps and 155.52 Mbps
Coded Mark Inversion (CMI) interfaces
TTL Reference frequencies of 38.88 MHz
(OC-3) or 34.816 MHz (E4)
Interface to both PECL and TTL logic
Lock detect on clock recovery function —
monitors run length and frequency
4-bit (nibble) system interface
The S3030B has two independent VCOs which are
synchronized to the local NRZ transmitted data and the
received CMI data repectively. The chip can be used
with either a 19.44 MHz or a 38.88 MHz reference clock
when operated in the SONET/SDH OC-3 mode. In E4
mode the chip can be operated with a 17.408 MHz or a
34.816 MHz reference in support of existing system
clockingschemes.On-chipcoded-mark-inversion(CMI)
encoding and decoding is provided for 139.264 Mbps
and 155.52 Mbps interfaces.
•
•
•
•
•
•
•
Low jitter PECL interface
+5v operation
100 PQFP TEP package
Supports both electrical and optical interfaces
The low jitter PECL nibble clock interface guarantees
compliance with the bit-error rate requirements of the
Bellcore, ANSI, and ITU-T standards. The S3030B is
packaged in a 0.65mm pitch 100-pin PQFP TEP.
APPLICATIONS
•
•
ATM over SONET/SDH
OC-3/STM-1 or E4-based transmission
systems
OC-3/STM-1 or E4 modules
OC-3/STM-1 or E4 test equipment
Section repeaters
Add drop multiplexors
Broadband cross-connects
Fiber optic terminators
The S3030B provides the major active components on-
chip for a coaxial cable interface, including analog
transformer driver circuitry and equalization interface
circuitry. Discrete controls permit separate selection of
CMI or NRZ operation and analog (coaxial copper) or
PECL (optical module) media interfaces. Both line
loopback and diagnostic local loopback operation are
supported.
•
•
•
•
•
•
•
Fiber optic test equipment
Figure 1a. Electrical Interface
COAX
4
4
Nibble Data
139/155 Mbps CMI
E4/STM-1/OC-3
OVERHEAD
PROCESSOR
XFMR
S3030B
XCVR
Nibble Data
COAX
139/155 Mbps CMI
XFMR
34.816/38.88 MHz
OSC
Figure 1b. Optical Interface
4
Nibble Data
Nibble Data
139/155 Mbps
139/155 Mbps
E4/STM-1/OC-3
OVERHEAD
PROCESSOR
OTX
S3030B
XCVR
4
ORX
34.816/38.88 MHz
OSC
1