SY69754AL_07 [MICREL]
3.3V, 622Mbps Clock and Data Recovery; 3.3V ， 622Mbps的时钟和数据恢复
| 型号： | SY69754AL_07 |
| 厂家： | 
MICREL SEMICONDUCTOR |
| 描述： | 3.3V, 622Mbps Clock and Data Recovery |
| 文件： | 总14页 (文件大小：488K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
SY69754AL
3.3V, 622Mbps Clock
and Data Recovery
General Description
Features
The SY69754AL is a complete Clock Recovery and
Data Retiming integrated circuit for OC-12/STS-12
applications at 622Mbps NRZ. The device is ideally
suited for SONET/SDH/ATM applications and other
high-speed data transmission systems.
3.3V power supply
• SONET/SDH/ATM compatible
• Clock and data recovery for 622Mbps NRZ data
stream
• Two on-chip PLLs: one for clock generation and
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.
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)
• Available in 32-pin EPAD-TQFP
The SY69754AL also includes a link fault detection
circuit.
Datasheets and support documentation can be found on
Micrel’s web site at: www.micrel.com.
Applications
• Ethernet media converter
• SONET/SDH/ATM OC-12
• Proprietary architecture at 500Mbps to 650Mbps
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com
M9999-082107-E
hbwhelp@micrel.com or (408) 955-1690
August 2007
Micrel, Inc.
SY69754AL
Ordering Information(1)
Part Number
SY69754ALHG
SY69754ALHGTR(2)
Notes:
Package
Type
Operating
Range
Package
Marking
Lead
Finish
H32-1
Industrial
SY69754ALHG with
Pb-Free bar-line indicator
NiPdAu
Pb-Free
H32-1
Industrial
SY69754ALHG with
Pb-Free bar-line indicator
NiPdAu
Pb-Free
1. Contact factory for die availability. Dice are guaranteed at TA = 25°C, DC Electricals only.
2. Tape and Reel.
Pin Configuration
32-Pin EPAD-TQFP (H32-1)
2
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August 2007
Micrel, Inc.
SY69754AL
Pin Description
Inputs
Pin Number
Pin Name
Type
Pin Name
2
3
RDINP
RDINN
Differential Serial Data Input: These built-in line receiver inputs are connected to the
PECL
differential receive serial data stream. An internal receive PLL recovers the
embedded clock (RCLK) and data (RDOUT) information.
5
REFCLK
CD
TTL Input Reference Clock: This input is used as the reference for the internal frequency
synthesizer and the "training" frequency for the receiver PLL to keep it centered in
the absence of data coming in on the RDIN inputs.
26
PECL
Input
Carrier Detect: This input controls the recovery function of the Receive PLL and
can be driven by the carrier detect output of optical modules or from external
transition detection circuitry. When this input is HIGH, the input data stream
(RDIN) is recovered normally by the Receive PLL. When this input is LOW the
data on the inputs RDIN will be internally forced to a constant LOW, the data
outputs RDOUT will remain LOW, the Link Fault Indicator output LFIN forced
LOW and the clock recovery PLL forced to look onto the clock frequency
generated from REFCLK.
32
25
DIVSEL1
DIVSEL2
TTL Input Divider Select: These inputs select the ratio between the output clock frequency
(RCLK/TCLK) and the REFCLK input frequency as shown in the “Reference
Frequency Selection” table.
16
CLKSEL
TTL Input Clock Select: This input is used to select either the recovered clock of the receiver
PLL (CLKSEL = HIGH) or the clock of the frequency synthesizer (CLKSEL =
LOW) to the TCLK outputs.
Outputs
Pin Number
31
Pin Name
Type
Pin Name
LFIN
TTL
Output
Link Fault Indicator: This output indicates the status of the input data stream
RDIN. Active HIGH signal is indicating when the internal clock recovery PLL has
locked onto the incoming data stream. LFIN will go HIGH if CD is HIGH and RDIN
is within the frequency range of the Receive PLL (1000ppm). LFIN is an
asynchronous output.
23
24
RDOUTN
RDOUTP
Differential Receive Data Output: These ECL 100K outputs represent the recovered data
PECL
from the input data stream (RDIN). This recovered data is specified against the
rising edge of RCLK.
20
21
RCLKN
RCLKP
Differential Clock Output: These ECL 100K outputs represent the recovered clock used to
PECL sample the recovered data (RDOUT).
18
17
TCLKP
TCLKN
Differential Clock Output: These ECL 100K outputs represent either the recovered clock
PECL
(CLKSEL = HIGH) used to sample the recovered data (RDOUT) or the transmit
clock of the frequency synthesizer (CLKSEL = LOW).
9
10
PLLSP
PLLSN
Clock Synthesis PLL Loop Filter: External loop filter pins for the clock synthesis
PLL.
14
15
PLLRN
PLLRP
Clock Recovery PLL Loop Filter: External loop filter pins for the receiver PLL.
3
M9999-082107-E
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August 2007
Micrel, Inc.
SY69754AL
Power and Ground
Pin Number
7, 27, 28
29, 30
Pin Name
Type
Pin Name
VCC
VCCA
VCCO
GND
Power Supply(1).
Analog Power Supply Voltage(1).
Output Supply Voltage(1).
Ground.
19, 22
4, 6, 12, 13
1, 8
NC
No connect.
11
GNDA
Analog Ground.
Note:
1. VCC, VCCA, VCCO must be the same value.
4
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hbwhelp@micrel.com or (408) 955-1690
August 2007
Micrel, Inc.
SY69754AL
Absolute Maximum Ratings(1)
Operating Ratings(2)
Supply Voltage (VCC)................................... -0.5V to +5.0V
Input Voltage (VIN)...........................................-0.5V to VCC
Input Voltage (VCC)............................ +3.15V to +3.45V
Ambient Temperature (TA) ................... –40°C to +85°C
Junction Temperature (TJ) ................................ +125°C
Package Thermal Resistance(3)
Output Current (IOUT
)
Continuous........................................................±50mA
Surge ..............................................................±100mA
Lead Temperature (soldering, 20sec.)................... +260°C
Storage Temperature (Ts) ........................-65°C to +150°C
EPAD-TQFP (θJA)
Still-air(4) ................................................. 28°C/W
500lfpm(4) ............................................... 20°C/W
EPAD-TQFP (θJC)........................................... 4°C/W
DC Electrical Characteristics
TA = –40°C to +85°C, unless otherwise noted.
Symbol
VCC
Parameter
Condition
Min
Typ
3.3
Max
3.45
160
Units
V
Power Supply Voltage
Power Supply Current
3.15
ICC
120
mA
PECL 100K DC Electrical Characteristics
VCC = VCCO = VCCA = 3.3V ±5%; TA = –40°C to +85°C, unless otherwise noted.
Symbol
VIH
Parameter
Condition
Min
Typ
Max
Units
V
Input HIGH Voltage
Input LOW Voltage
Output HIGH Voltage
Output LOW Voltage
Input LOW Current
VCC-1.165
VCC-1.810
VCC-1.075
VCC-1.860
0.5
VCC-0.880
VCC-1.475
VCC-0.830
VCC-1.570
VIL
V
VOH
VOL
IIL
50Ω to VCC-2V
50Ω to VCC-2V
VIN = VIL (Min)
V
V
µA
TTL DC Electrical Characteristics
VCC = VCCO = VCCA = 3.3V ±5%; TA = –40°C to +85°C, unless otherwise noted.
Symbol
VIH
Parameter
Condition
Min
Typ
Max
VCC
0.8
Units
Input HIGH Voltage
Input LOW Voltage
Output HIGH Voltage
Output LOW Voltage
Input HIGH Current
2.0
V
V
V
V
VIL
VOH
VOL
IOH = -0.4mA
IOL = 4mA
2.0
0.5
IIH
V
V
IN = 2.7V, VCC = Max.
IN = VCC, VCC = Max.
-125
µA
µA
+100
IIL
Input LOW Voltage
VIN = 0.5V, VCC = Max.
-300
-15
µA
IOS
Output Short Circuit Current
VOUT = 0V, (max., 1 sec.)
-100
mA
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. The data sheet limits are not guaranteed if the device is operated beyond the operating ratings.
3. Airflow of 500lfpm recommended for 28-pin SOIC.
4. Using JEDEC standard test boards with die attach pad soldered to PCB. See www.amkor.com for additional package details.
5
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hbwhelp@micrel.com or (408) 955-1690
August 2007
Micrel, Inc.
SY69754AL
AC Electrical Characteristics
VCC = VCCO = VCCA = 3.3V ±5%; TA = –40°C to +85°C, unless otherwise noted.
Symbol Parameter
Condition
Min
Typ
Max
Units
MHz
%
fVCO
VCO Center Frequency
fREFCLK x Byte Rate
Nominal
1000
1300
VCO Center Frequency
Tolerance
5
∆fVCO
tACQ
tCPWH
tCPWL
tir
Acquisition Lock Time
50Ω to VCC-2V
50Ω to VCC-2V
VIN = VIL (Min)
15
µs
ns
ns
ns
REFCLK Pulse Width HIGH
REFCLK Pulse Width LOW
REFCLK Input Rise Time
Output Duty Cycle (RCLK/TCLK)
4
4
0.5
2
tODC
45
55
% of
UI
tr, tf
ECL Output Rise/Fall Time
(20% to 80%)
50Ω to VCC-2
100
400
ps
tSKEW
tDV
Recovered Clock Skew
Data Valid
-200
+200
ps
ps
ps
1/(2xfRCLK) -200
1/(2xfRCLK) -200
tDH
Data Hold
Timing Waveforms
6
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August 2007
Micrel, Inc.
SY69754AL
Functional Block
the PLL to track the jitter, yet tolerate the minimum
transition density expected in a received SONET data
signal. This transfer function yields a 30µs data
stream of continuous 1's or 0's for random incoming
NRZ data.
Functional Description
Clock Recovery
Clock Recovery, as shown in the block diagram,
generates a clock that is at the same frequency as the
incoming data bit rate at the Serial Data input. The
clock is phase aligned by a PLL so that it samples the
data in the center of the data eye pattern.
Lock Detect
The SY69754AL contains a link fault indication circuit,
which monitors the integrity of the serial data inputs. If
the received serial data fails the frequency test, then
the PLL will be forced to lock to the local reference
clock. This will maintain the correct frequency of the
recovered clock output under loss of signal or loss of
lock conditions. If the recovered clock frequency
deviates from the local reference clock frequency by
more than approximately 1000ppm, the PLL will be
declared out of lock. The lock detect circuit will poll the
input data stream in an attempt to reacquire lock to
data. If the recovered clock frequency is determined to
be within approximately 1000ppm, the PLL will be
declared in lock and the lock detect output will go
active.
The phase relationship between the edge transitions
of the data and those of the generated clock are
compared by a phase/frequency detector. Output
pulses from the detector indicate the required
direction of phase correction. These pulses are
smoothed by an integral loop filter. The output of the
loop filter controls the frequency of the Voltage
Controlled Oscillator (VCO), which generates the
recovered clock.
Frequency stability, without incoming data, is
guaranteed by an alternate reference input (REFCLK)
that the PLL locks onto when data is lost. If the
Frequency of the incoming signal varies by greater
than approximately 1000ppm with respect to the
synthesizer frequency, the PLL will be declared out of
lock, and the PLL will lock to the reference clock.
During the interval when the CDR is not locked onto
the RDIN input, the LFIN output will not be a static
LOW, but will be changing.
The loop filter transfer function is optimized to enable
7
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August 2007
Micrel, Inc.
SY69754AL
Loop Filter Components(1)
R1 = 350Ω
R2 = 680Ω
C1 = 1.0µF (X7R Dielectric)
C2 = 1.0µF (X7R Dielectric)
Note:
1. Suggested values. Values may vary for different applications.
Reference Frequency Selection
DIVSEL1
DIVSEL2
fRCLK/fREFCLK
0
0
1
1
0
1
0
1
8
10
16
20
8
M9999-082107-E
hbwhelp@micrel.com or (408) 955-1690
August 2007
Micrel, Inc.
SY69754AL
Application Example AC-Coupled I/O
9
M9999-082107-E
hbwhelp@micrel.com or (408) 955-1690
August 2007
Micrel, Inc.
SY69754AL
Application Example DC-Coupled I/O
Related Product and Support Documentation
Part Number
Function
Data Sheet Link
SY87701AL
Low-Power 3.3V, 28Mbps to 1300Mbps AnyRate®
Clock and Data Recovery
www.micrel.com/product-info/products/sy87701al.shtml
HBW Solutions New Products and Applications
www.micrel.com/product-info/products/solutions.shtml
10
M9999-082107-E
hbwhelp@micrel.com or (408) 955-1690
August 2007
Micrel, Inc.
SY69754AL
Bill of Materials (AC-Coupled)
Item
C6
Part Number
Manufacturer
Vishay(1)
Description
Qty.
293D685X0025B2T
VJ206Y103JXJAT
VJ0603Y105JXJAT
VJ0402Y104JXJAT
6.8µF, 25V, Tantalum Capacitor, Size B
0.01µF Ceramic Capacitor, Size 1206, X7R Dielectric
1.0µF Ceramic Capacitor, Size 0603, X7R Dielectric
0.1µF Ceramic Capacitor, Size 0402, X7R Dielectric
1
1
2
8
C7
Vishay(1)
Vishay(1)
Vishay(1)
C10, C11
C12-C15,
C18, C19,
C27, C28
C20-C26
D1
VJ0402Y104JXJAT
P301-ND
Vishay(1)
Panasonic(2)
Vishay(1)
0.01µF Ceramic Capacitor, Size 1206, X7R Dielectric
LED Diode, T-1 3/4, Red Clear
7
1
1
4
D2
P300-ND/P301-ND
T-1 3/4, Red LED
J2, J3, J4, 111-0702-001
J6
Johnson
Red, Insulated Thumb Nut Binding Post
(Jumped Together)
Components(3)
J5
BLM21A102F
Murata(4)
Black, Insulated Thumb Nut Binding Post, GND
1
(Jumped to VEE
)
Q1
R1
R2
459-2598-5-ND
NTE(5)
2N2222A Buffer/Driver Transistor, NPN
350Ω Resistor, 2%, Size 0402
1
1
1
4
CRCW04023500F
CRCW04026800F
CRCW04021001F
Vishay(1)
Vishay(1)
Vishay(1)
680Ω Resistor, 2%, Size 0402
R3, R8,
R9, R10
1kΩ Pull-up Resistor, 2%, Size 1206
R11-R16,
R28-R30,
R32
CRCW04021820F
Vishay(1)
182Ω Resistor, 2%, Size 0402
10
R21
CRCW06031300F
CRCW04021820F
CRCW04022825F
CRCW04021300F
CRCW0402OOR0F
CRCW04025000F
142-0701-851
Vishay(1)
Vishay(1)
Vishay(1)
Vishay(1)
Vishay(1)
Vishay(1)
130Ω Resistor, 2%, Size 0603
12.1kΩ Resistor, 2%, Size 1206
82Ω Resistor, 2%, Size 0402
130Ω Resistor, 2%, Size 0402
0Ω Resistor, 2%, Size 0402
50Ω Resistor, 2%, Size 0402
End Launch SMA Jack
1
1
R22
R23, R24
R25, R26
R27
2
2
1
R31
1
SMA1-
SMA10
Johnson
10
Components(3)
SP1-SP6
SW1
U1
Solder Jump Option
6
1
CT2068-ND
SY69754AL
SY89322V
CTS(6)
Micrel, Inc.(7)
Micrel, Inc.(7)
8-Position, Top Actuated Slide Dip Switch
Low-Power 3.3V 622Mbps Clock and Data Recovery
1
1
U2
3.3/5V Dual LVTTL/LVCMOS-to-Differential LVPECL
Translator
Notes:
1. Vishay: www.vishay.com.
2. Panasonic: www.panasonic.com.
3. Johnson Components: www.johnson-components.com.
4. Murata: www.murata.com.
5. NTE: www.nte.com.
6. CTS: www.cts.com.
7. Micrel, Inc: www.micrel.com.
11
M9999-082107-E
hbwhelp@micrel.com or (408) 955-1690
August 2007
Micrel, Inc.
SY69754AL
Bill of Materials (DC-Coupled)
Item
C6
Part Number
Manufacturer
Vishay(1)
Description
Qty.
293D685X0025B2T
VJ206Y103JXJAT
VJ0603Y105JXJAT
VJ0402Y104JXJAT
6.8µF, 25V, Tantalum Capacitor, Size B
0.01µF Ceramic Capacitor, Size 1206, X7R Dielectric
1.0µF Ceramic Capacitor, Size 0603, X7R Dielectric
0.1µF Ceramic Capacitor, Size 0402, X7R Dielectric
1
1
2
8
C7
Vishay(1)
Vishay(1)
Vishay(1)
C10, C11
C12-C15,
C18, C19,
C27, C28
C20-C26
D1
VJ0402Y104JXJAT
P301-ND
Vishay(1)
Panasonic(2)
Vishay(1)
0.01µF Ceramic Capacitor, Size 1206, X7R Dielectric
LED Diode, T-1 3/4, Red Clear
7
1
1
4
D2
P300-ND/P301-ND
T-1 3/4, Red LED
J2, J3, J4, 111-0702-001
J6
Johnson
Red, Insulated Thumb Nut Binding Post
(Jumped Together)
Components(3)
J5
BLM21A102F
Johnson
Black, Insulated Thumb Nut Binding Post, GND
(Jumped to VEE)
1
Components(3)
Q1
R1
R2
459-2598-5-ND
NTE(5)
2N2222A Buffer/Driver Transistor, NPN
350Ω Resistor, 2%, Size 0402
1
1
1
4
CRCW04023500F
CRCW04026800F
CRCW04021001F
Vishay(1)
Vishay(1)
Vishay(1)
680Ω Resistor, 2%, Size 0402
R3, R8,
R9, R10
1kΩ Pull-up Resistor, 2%, Size 1206
R15, R16,
R30, R32
CRCW04021820F
Vishay(1)
182Ω Resistor, 2%, Size 0402
10
R21
CRCW06031300F
CRCW04021820F
CRCW04022825F
CRCW0402OOR0F
CRCW04025000F
142-0701-851
Vishay(1)
Vishay(1)
Vishay(1)
Vishay(1)
Vishay(1)
130Ω Resistor, 2%, Size 0603
12.1kΩ Resistor, 2%, Size 1206
82Ω Resistor, 2%, Size 0402
0Ω Resistor, 2%, Size 0402
50Ω Resistor, 2%, Size 0402
End Launch SMA Jack
1
1
R22
R23, R24
R27
2
1
R31
1
SMA1-
SMA10
Johnson
10
Components(3)
SP1-SP6
SW1
U1
Solder Jump Option
6
1
CT2068-ND
SY69754AL
SY89322V
CTS(6)
Micrel, Inc.(7)
Micrel, Inc.(7)
8-Position, Top Actuated Slide Dip Switch
Low-Power 3.3V 622Mbps Clock and Data Recovery
1
1
U2
3.3/5V Dual LVTTL/LVCMOS-to-Differential LVPECL
Translator
Notes:
1. Vishay: www.vishay.com.
2. Panasonic: www.panasonic.com.
3. Johnson Components: www.johnson-components.com.
4. Murata: www.murata.com.
5. NTE: www.nte.com.
6. CTS: www.cts.com.
7. Micrel, Inc: www.micrel.com.
12
M9999-082107-E
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August 2007
Micrel, Inc.
SY69754AL
6. Maintain low jitter on the REFCLK input. Isolate the
Appendix A
Layout and General Suggestions
XTAL oscillator from power supply noise by adequately
decoupling. Keep XTAL oscillator close to device, and
minimize capacitive coupling from adjacent signals.
1. Establish controlled impedance stripline, microstrip, or
coplanar construction techniques.
7. Higher speed operation may require use of
fundamental-tone (third-overtone typically has more
jitter) crystal-based oscillator for optimum performance.
Evaluate and compare candidates by measuring
TXCLK jitter.
2. Signal paths should have approximately the same width
as the device pads.
3. All differential paths are critical timing paths, where
skew should be matched to within ±10ps.
8. All unused outputs require termination. To conserve
power, unused PECL outputs can be terminated with a
1kΩ resistor to VEE.
4. Signal trace impedance should not vary more than
±5%. If in doubt, perform TDR analysis of all high-speed
signal traces.
5. Maintain compact filter networks as close to filter pins
as possible. Provide ground plane relief under filter path
to reduce stray capacitance. Be careful of crosstalk
coupling into the filter network.
13
M9999-082107-E
hbwhelp@micrel.com or (408) 955-1690
August 2007
Micrel, Inc.
SY69754AL
Package Information
32-Pin Package Type (H32-1)
MICREL, INC. 2180 FORTUNE DRIVE SAN JOSE, CA 95131 USA
TEL +1 (408) 944-0800 FAX +1 (408) 474-1000 WEB http://www.micrel.com
The information furnished by Micrel in this data sheet is believed to be accurate and reliable. However, no responsibility is assumed by Micrel for
its use. Micrel reserves the right to change circuitry and specifications at any time without notification to the customer.
Micrel Products are not designed or authorized for use as components in life support appliances, devices or systems where malfunction of a
product can reasonably be expected to result in personal injury. Life support devices or systems are devices or systems that (a) are intended for
surgical implant into the body or (b) support or sustain life, and whose failure to perform can be reasonably expected to result in a significant
injury to the user. A Purchaser’s use or sale of Micrel Products for use in life support appliances, devices or systems is a Purchaser’s own risk
and Purchaser agrees to fully indemnify Micrel for any damages resulting from such use or sale.
© 2006 Micrel, Incorporated.
14
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August 2007
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