S3076 Datasheet, PDF (1/18 Pages) List of Unclassifed Manufacturers – MULTI-RATE SONET/SDH CLOCK RECOVERY UNIT

DEVICE
S_MPE_UC_LI_TFI_IC_-RAT_AIO_TEN _{SONET/SDH CLOCK RECOVERY UNIT}
BMiUCLMTOI-SRAPTEECLSOCNLEOTC/KSDGHECNLEORCAKTORRECOVERY UNIT
®
S3076
S3076
FEATURES
• SiGe BiCMOS technology
• Complies with Bellcore and ITU-T specifica-
tions for jitter tolerance, jitter transfer and
jitter generation
• On-chip high frequency PLL with internal
loop filter for clock recovery
• Supports clock recovery for:
OC-48 (2488.32 Mbps) (with FEC)
Fibre Channel (2125 Mbps) (with FEC)
OC-24 (1244.16 Mbps) (with FEC)
Gigabit Ethernet (1250 Mbps) (with FEC)
Fibre Channel (1062.5 Mbps) (with FEC)
OC-12 (622.08 Mbps) (with FEC)
OC-3 (155.52 Mbps) (with FEC) NRZ data
• Selectable reference frequencies
19.44 MHz or 155.52 MHz
(or equivalent Fibre Channel/
Gigabit Ethernet frequencies)
• Lock detect—monitors frequency of
incoming data
• Low-jitter serial interface
• +3.3 V supply
• Compact 48 pin TQFP TEP package
• Typical power 620 mW
• Available in Die form also
GENERAL DESCRIPTION
The function of the S3076 clock recovery unit is to
derive high speed timing signals for SONET/SDH-
based equipment. The S3076 is implemented using
AMCC’s proven Phase Locked Loop (PLL) technology.
Figure 1 shows a typical network application.
The S3076 receives an OC-48, OC-24, OC-12, OC-3,
Fibre Channel or Gigabit Ethernet scrambled NRZ sig-
nal with FEC capability up to 8 bytes per 255-byte
block and recovers the clock from the data. The chip
outputs a differential bit clock and retimed data.
The S3076 utilizes an on-chip PLL which consists
of a phase detector, a loop filter, and a Voltage
Controlled Oscillator (VCO). The phase detector
compares the phase relationship between the VCO
output and the serial data input. A loop filter con-
verts the phase detector output into a smooth DC
voltage, and the DC voltage is input to the VCO
whose frequency is varied by this voltage. A block
diagram is shown in Figure 2.
Figure 1. System Block Diagram
16
16
OTX
ORX S3076
S3057
16
S3076 ORX
OTX
S3057
16
October 23, 2000 / Revision A
1