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PDF SY87701V Data sheet ( Hoja de datos )
| Número de pieza | SY87701V | |
| Descripción | 5V/3.3V 32-1250Mbps AnyRate CLOCK AND DATA RECOVERY | |
| Fabricantes | Micrel Semiconductor | |
| Logotipo |  |
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5V/3.3V 32-1250Mbps AnyRate™
CLOCK AND DATA RECOVERY
SY87701V
FEATURES
DESCRIPTION
s 3.3V and 5V power supply options
s Clock and data recovery from 32Mbps up to
1.25Gbps NRZ data stream
s Complies with Bellcore, ITU/CCITT and ANSI
specifications for applications such as OC-1, OC-3,
OC-12, ATM, FDDI, etc.
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 Available in 28-pin SOIC and 32-pin EP-TQFP
packages
The SY87701V is a complete Clock Recovery and Data
Retiming integrated circuit for data rates from 32Mbps
up to 1.25Gbps 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 SY87701V also includes a link fault detection
circuit.
APPLICATIONS
s SONET/SDH/ATM OC-1, OC-3, OC-12, OC-24
s Fibre Channel, Escon
s Gigabit Ethernet/Fast Ethernet
s Proprietary architecture up to 1.25Gbps
BLOCK DIAGRAM
PLLR P/N
RDINP
(PECL)
RDINN
CD
(PECL)
PHASE
DETECTOR
PHASE/
FREQUENCY
DETECTOR
0
1
CHARGE
PUMP
VCO
LINK
FAULT
DETECTOR
RDOUTP
(PECL)
RDOUTN
RCLKP
(PECL)
RCLKN
LFIN
(TTL)
REFCLK
(TTL)
PHASE/
FREQUENCY
DETECTOR
CHARGE
PUMP
VCO
1
0
DIVIDER
BY 8, 10, 16, 20
DIVSEL 1/2
(TTL)
AnyRate™ is a trademark of Micrel, Inc.
SY87701V
PLLS P/N
FREQSEL 1/2/3
(TTL)
1
CLKSEL
(TTL)
TCLKP
(PECL)
TCLKN
VCC
VCCA
VCCO
GND
Rev.: H Amendment: /0
Issue Date: September 2000
1 page  
Micrel
FREQUENCY SELECTION TABLE
FREQSEL1
0
0
0
0
1
1
1
1
FREQSEL2
0
0
1
1
0
0
1
1
FREQSEL3
0
1
0
1
0
1
0
1
SY87701V
fVCO/fRCLK
1
2
4
6
8
12
16
24
fRCLK Data Rates (Mbps)
750 – 1250
375 – 625
188 – 313
125 – 208
94 – 157
63 – 104
47 – 78
32 – 52
REFERENCE FREQUENCY SELECTION
ABSOLUTE MAXIMUM RATINGS(1, 2)
DIVSEL1
0
0
1
1
DIVSEL2
0
1
0
1
fRCLK/fREFCLK
8
10
16
20
LOOP FILTER COMPONENTS(1)
R5 C3
PLLSP
PLLSN
SONET
R5 = 80Ω
C3 = 1.5µF (X7R Dielectric)
Wide Range
R5 = 350Ω
C3 = 0.47µF (X7R Dielectric)
Symbol
VCC
VI
IOUT
Tstore
TA
θJA
Rating
Power Supply
Input Voltage
Output Current
–Continuous
–Surge
Storage Temperature
Operating Temperature
Thermal Resistance
@still air
Value
Unit
–0.5 to +7.0 V
–0.5 to VCC
V
mA
50
100
–65 to +150 °C
0 to +85
°C
80 single °C/W
layer board,
46 multi-layer
NOTES:
1. Permanent device damage may occur if ABSOLUTE MAXIMUM RATINGS
are exceeded. This is a stress rating only and functional operation is not
implied at conditions other than those detailed in the operational sections
of this data sheet. Exposure to ABSOLUTE MAXIMUM RATING conditions
for extended periods may affect device reliability.
2. Airflow of 500LFPM recommended.
R6 C4
PLLRP
PLLRN
SONET
R6 = 50Ω
C4 = 1.0µF (X7R Dielectric)
Wide Range
R6 = 680Ω
C4 = 0.47µF (X7R Dielectric)
NOTE:
1. Suggested Values. Values may vary for different applications.
5
5 Page 
Micrel
32 LEAD EPAD TQFP (DIE UP) (H32-1)
SY87701V
Rev. 01
11
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet SY87701V.PDF ] | |
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