Micrel, Inc.
3.3V 28Mbps to 1.3Gbps AnyRate® Clock and Data Recovery
SY87701AL
SY87701AL
FEATURES
DESCRIPTION
s Industrial temperature range (–40°C to +85°C) s 3.3V power supply
s Clock and data recovery from 28Mbps up to 1.3Gbps NRZ data stream, clock generation from 28Mbps to 1.3Gbps
s Complies with Bellcore, ITU/CCITT and ANSI specifications for applications such as OC-1, OC-3, OC-12, ATM, FDDI, Fibre Channel and Gigabit Ethernet as well as proprietary applications
s Two on-chip PLLs: one for clock generation and another for clock recovery
s Selectable reference frequencies
s Differential PECL high-speed serial I/O
s Line receiver input: no external buffering needed
s Link fault indication
s 100k ECL compatible I/O
s Lower power: fully compatible with Micrel's SY87701V, but with 30% less power
s Available in 32-pin EPAD-TQFP and 28-pin SOIC packages (28-pin SOIC is available, but NOT recommended for new designs.)
The SY87701AL is a complete Clock Recovery and Data Retiming integrated circuit for data rates from 28Mbps up to 1.3Gbps NRZ. The device is ideally suited for SONET/SDH/ATM and Fibre Channel 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 SY87701AL also includes a link fault detection circuit.
All support documentation can be found on Micrel’s web site at: www.micrel.com.
APPLICATIONS
s SONET/SDH/ATM OC-1, OC-3, OC-12, OC-24 s Fibre Channel, Escon, SMPTE 259 s Gigabit Ethernet/Fast Ethernet s Proprietary architecture up to 1.3Gbps
BLOCK DIAGRAM
PLLR P/N
RDINP (PECL) RDINN
CD (PECL) REFCLK
(TTL)
PHASE DETECTOR
PHASE/
FREQUENCY DETECTOR
0 1
CHARGE PUMP
VCO
PHASE/
FREQUENCY DETECTOR
CHARGE PUMP
VCO
LINK FAULT DETECTOR
1 0
DIVIDER BY 8, 10, 16, 20
DIVSEL 1/2 (TTL)
AnyRate is a registered trademark of Micrel, Inc.
M9999-082107
[email protected] or (408) 955-1690
SY87701AL
PLLS P/N
FREQSEL 1/2/3 (TTL)
1
CLKSEL (TTL)
RDOUTP (PECL) RDOUTN
RCLKP (PECL) RCLKN
LFIN (TTL)
TCLKP (PECL) TCLKN VCC VCCA VCCO GND
Rev.: G Amendment: /0 Issue Date: August 2007
Micrel, Inc.
SY87701AL
PACKAGE/ORDERING INFORMATION
VCCA 1 LFIN 2
DIVSEL1 3 RDINP 4 RDINN 5
FREQSEL1 6 REFCLK 7
FREQSEL2 8 FREQSEL3 9
N/C 10 PLLSP 11 PLLSN 12 GNDA 13
GND 14
28 VCC 27 CD 26 DIVSEL2 25 RDOUTP 24 RDOUTN 23 VCCO 22 RCLKP 21 RCLKN 20 VCCO 19 TCLKP 18 TCLKN 17 CLKSEL 16 PLLRP 15 PLLRN
28-Pin SOIC (Z28-1)
Ordering Information
Part Number SY87701ALZI SY87701ALHI SY87701ALZG
Package Type Z28-1 H32-1 Z28-1
Operating Range
Industrial Industrial Industrial
SY87701ALHG(1)
H32-1
Industrial
Note: 1. Pb-Free package recommended for new designs.
Package Marking
SY87701ALZI
SY87701ALHI
SY87701ALZG with Pb.