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SY87700VZHTR Datasheet

  • SY87700VZHTR

  • 5V/3.3V 32-175Mbps AnyRate CLOCK AND DATA RECOVERY

  • 15頁

  • MICREL   MICREL

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Micrel, Inc.
5V/3.3V 32-175Mbps AnyRate
廬
CLOCK AND DATA RECOVERY
SY87700V
SY87700V
FEATURES
鈻?/div>
3.3V and 5V power supply options
鈻?/div>
SONET/SDH/ATM compatible
鈻?/div>
Clock and data recovery from 32Mbps up to
175Mbps NRZ data stream, clock generation from
32Mbps to 175Mbps
鈻?/div>
Two on-chip PLLs: one for clock generation and
another for clock recovery
鈻?/div>
Selectable reference frequencies
鈻?/div>
Differential PECL high-speed serial I/O
鈻?/div>
Line receiver input: no external buffering needed
鈻?/div>
Link Fault indication
鈻?/div>
100K ECL compatible I/O
鈻?/div>
Complies with Bellcore, ITU/CCITT and ANSI
specifications such as OC-1, OC-3, FDDI, Fast
Ethernet, as well as proprietary applications
鈻?/div>
Available in 32-pin EPAD-TQFP and 28-pin SOIC
packages (28-pin SOIC is available, but not
recommended for new designs)
AnyRate
廬
DESCRIPTION
The SY87700V is a complete Clock Recovery and Data
Retiming integrated circuit for data rates from 32Mbps
up to 175Mbps 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 SY87700V also includes a link fault detection
circuit.
Data sheets and support documentation can be found on
Micrel鈥檚 web site at: www.micrel.com.
APPLICATIONS
鈻?/div>
SONET/SDH/ATM OC-1/OC-3
鈻?/div>
Fast Ethernet
鈻?/div>
Proprietary architectures up to 175Mbps
BLOCK DIAGRAM
PLLR P/N
RDOUTP
(PECL)
RDOUTN
0
1
PHASE/
FREQUENCY
DETECTOR
LINK
FAULT
DETECTOR
RDINP
(PECL)
RDINN
PHASE
DETECTOR
CHARGE
PUMP
VCO
RCLKP
(PECL)
RCLKN
CD
(PECL)
REFCLK
(TTL)
LFIN
(TTL)
PHASE/
FREQUENCY
DETECTOR
CHARGE
PUMP
VCO
1
0
TCLKP
(PECL)
TCLKN
DIVIDER
BY 8, 10, 16, 20
SY87700V
DIVSEL 1/2
(TTL)
PLLS P/N
FREQSEL 1/2/3
(TTL)
CLKSEL
(TTL)
V
CC
V
CCA
V
CCO
GND
AnyRate is a registered trademark of Micrel, Inc.
M9999-111406
hbwhelp@micrel.com or (408) 955-1690
Rev.: J
Amendment: /0
1
Issue Date: November 2006

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