參數資料
型號: SY87702L
英文描述: High Efficient Rectifier Diodes
中文描述: AnyRate?的CDR
文件頁數: 1/14頁
文件大?。?/td> 168K
代理商: SY87702L
DESCRIPTION
FEATURES
SY87700L
FINAL
I
Industrial temperature range (–40
°
C to +85
°
C)
I
3.3V power supply
I
SONET/SDH/ATM compatible
I
Clock and data recovery from 32Mbps up to
175Mbps NRZ data stream, clock generation from
32Mbps to 175Mbps
I
Two on-chip PLLs: one for clock generation and
another for clock recovery
I
Selectable reference frequencies
I
Differential PECL high-speed serial I/O
I
Line receiver input: no external buffering needed
I
Link Fault indication
I
100K ECL compatible I/O
I
Complies with Bellcore, ITU/CCITT and ANSI
specifications for applications such as OC-1 and
OC-3 as well as proprietary applications
I
Available in 32-pin EPAD-TQFP and 28-pin SOIC
packages
The SY87700L 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 SY87700L also includes a link fault detection
circuit.
3.3V 32-175Mbps AnyRate
CLOCK AND DATA RECOVERY
APPLICATIONS
I
SONET/SDH/ATM OC-1 and OC-3
I
Fast Ethernet, SMPTE 259
I
Proprietary architecture up to 175Mbps
BLOCK DIAGRAM
PHASE
DETECTOR
PHASE/
FREQUENCY
DETECTOR
CHARGE
PUMP
VCO
CHARGE
PUMP
VCO
LINK
FAULT
DETECTOR
DIVIDER
BY 8, 10, 16, 20
REFCLK
(TTL)
CD
RDINN
RDINP
(PECL)
PLLR P/N
CLKSEL
(TTL)
RDOUTP
(PECL)
RCLKP
(PECL)
RCLKN
RDOUTN
LFIN
(TTL)
FREQSEL 1/2/3
(TTL)
PLLS P/N
DIVSEL 1/2
(TTL)
SY87700L
TCLKP
(PECL)
TCLKN
V
CC
V
CCA
V
CCO
GND
1
0
(PECL)
0
1
PHASE/
FREQUENCY
DETECTOR
1
AnyRate is a trademark of Micrel, Inc.
Rev.: D
Issue Date:
Amendment: /0
June 2002
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