Datasheet Microchip SY87700 — 数据表

SY87700AL
Low-Power, 3.3V, 32Mbps to 208Mbps
AnyRateВ® Clock and Data Recovery General Description
The SY87700AL is a complete clock recovery and data
retiming integrated circuit for data rates from 32Mbps up
to 208Mbps NRZ. The device is ideally suited for
SONET/SDH/ATM applications and other high-speed
data transmission systems.
Clock recovery and data retiming is performed by
synchronizing the on-chip VCO directly to the incoming
data stream. The VCO center frequency is controlled by
the reference clock frequency and the selected divide
ratio. On-chip clock generation is performed through the
use of a frequency multiplier PLL with a byte rate source
as reference.
The SY87700AL also includes a link fault detection
circuit.
Data sheets and support documentation can be found
on Micrel’s web site at: www.micrel.com. AnyRate® Features 3.3V power supply SONET/SDH/ATM compatible Clock and data recovery from 32Mbps up to
208Mbps NRZ data stream; clock generation from
32Mbps to 208Mbps Two on-chip PLLs: one for clock generation and
another for clock recovery Selectable reference frequencies Differential PECL high-speed serial I/O Line receiver input: no external buffering needed Link fault indication 100K ECL-compatible I/O Industrial temperature range (–40°C to +85°C) Low power: fully compatible with Micrel’s SY87700V,
but with 30% less power Available in 32-pin EPAD-TQFP and 28-pin EPAD …

3.3V 32-175Mbps AnyRateВ®
CLOCK AND DATA RECOVERY
Use lower-power SY87700AL for new designs Micrel, Inc. FEATURES
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■ ■ SY87700L SY87700L DESCRIPTION Industrial temperature range (–40°C to +85°C)
3.3V power supply
SONET/SDH/ATM compatible
Clock and data recovery from 32Mbps up to
175Mbps NRZ data stream, clock generation from
32Mbps to 175Mbps
Two on-chip PLLs: one for clock generation and
another for clock recovery
Selectable reference frequencies
Differential PECL high-speed serial I/O
Line receiver input: no external buffering needed …

5V/3.3V 32-175Mbps AnyRateВ®
SY87700V
SY87700V
CLOCK AND DATA RECOVERY
Use lower-power SY87700AL for 3.3V systems Micrel, Inc. FEATURES
в–  3.3V and 5V power supply options
в–  SONET/SDH/ATM compatible
в–  Clock and data recovery from 32Mbps up to
175Mbps NRZ data stream, clock generation from
32Mbps to 175Mbps
в–  Two on-chip PLLs: one for clock generation and
another for clock recovery
в–  Selectable reference frequencies
в–  Differential PECL high-speed serial I/O
в–  Line receiver input: no external buffering needed
в–  Link Fault indication
в–  100K ECL compatible I/O
в–  Complies with Bellcore, ITU/CCITT and ANSI
specifications such as OC-1, OC-3, FDDI, Fast
Ethernet, as well as proprietary applications
в–  Available in 32-pin EPAD-TQFP and 28-pin SOIC
packages (28-pin SOIC is available, but not
recommended for new designs, see page 2 for …