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Advance Data Sheet, Rev. 1 October 2001
R485-Type Lightwave Receiver with Clock Recovery for 2.488 Gbits/s Applications
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Agere Systems Inc. Reliability and Qualification Program for built-in quality SONET/SDH compatible for OC-48/STM-16 data rate
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Applications
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Telecommunications -- Inter- and intraoffice SONET/SDH -- Subscriber loop -- Metropolitan area networks High-speed data communications
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Manufactured in a low-profile, 24-pin package, the R485-Type Receiver features either an avalanche or PIN photodetector, a transimpedance amplifier, a limiting amplifier, and a clock and data recovery IC.
Description
The R485-Type 2.5 Gbits/s lightwave receiver is designed for use in SONET OC-48 and synchronous digital hierarchy (SDH) STM-16 telecommunications applications and high-speed data communications applications. The receiver converts received optical signals in the range of 1.2 m to 1.6 m wavelength into differential data and clock outputs. The receiver consists of either InGaAs APD or PIN photodetector (depending on model selected), a transimpedance amplifier, a limiting amplifier, and a clock and data recovery IC (CDR). The CDR uses PLL technology to extract the clock signal from the converted optical signal. A TTL compatible link status flag signal indicates when there is a loss of optical signal. The receiver is manufactured in a low-profile, pigtailed, 24-pin plastic DIP package. It requires a single, +5.0 V power supply. The APD version has the added benefit of containing the high-voltage supply internal to the receiver. This internal supply also provides the necessary temperature compensation for the APD.
Features
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Multisourced footprint Internal APD bias supply Differential data and clock outputs APD and PIN versions Typical sensitivity: --APD, -32 dBm --PIN, -23 dBm Operation at 1.3 m or 1.55 m TTL link status flag Wide operating case temperature range: --APD, 0 C to +70 C --PIN, -40 C to +85 C Space-saving, self-contained, 24-pin DIP
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R485-Type Lightwave Receiver with Clock Recovery for 2.488 Gbits/s Applications
Advance Data Sheet, Rev. 1 October 2001
Flag Output
When the incoming optical signal falls below the linkstatus switching threshold, the FLAG output is asserted and the FLAG output logic level changes from a TTL low to a TTL high.
Receiver Processing
The R485-Type receiver devices can withstand normal wave soldering processes. The complete receiver module is not hermetically sealed; therefore, it should not be immersed in, or sprayed with, any solutions. The optical connector process cap deformation temperature is 85 C. The receiver pins can be wave soldered at 250 C for 10 seconds.
Pin Information
Table 1. Pin Information Pin 1 2 3 4 5 6 7 8 9 10 11 12 NIC NUC* LOS Flag Ground CLOCK CLOCK Ground VCC Ground DATA DATA Ground
Electrostatic Discharge
Pin 24 23 22 21 20 19 18 17 16 15 14 13 NUC* NUC* VCC NUC* Ground Ground NIC Ground Ground Ground Ground DTV/NIC Name CAUTION: This device is susceptible to damage as a result of electrostatic discharge (ESD). Take proper precautions during both handling and testing. Follow guidelines such as JEDEC Publication No. 108-A (Dec. 1988). Although protection circuitry is designed into the device, take proper precautions to avoid exposure to ESD. Agere employs a human-body model HBM) for ESDsusceptibility testing and protection design evaluation. ESD voltage thresholds are dependent on the critical parameters used to define the model. A standard HBM (resistance = 1.5 k, capacitance = 100 pF) is widely used and, therefore, can be used for comparison purposes.
Name
* Pins designated as no user connect (NUC) are connected internally. The user should not make any connections to these pins. The loss of signal (LOS) FLAG output is a logic level that indicates the presence or absence of a minimum acceptable level of optical input. A TTL logic HIGH indicates the absence of a valid optical input signal. This pin is not internally connected if the amplitude decision threshold (DTV) is not made adjustable.
Installation Considerations
Although the receiver has been designed with ruggedness in mind, care should be used during handling. The optical connector should be kept free from dust. The optical connector process cap should be kept in place as a dust cover when the device is not connected to a cable. If contamination is present on the optical connector, the use of canned air with a extension tube should remove any loose debris. Other cleaning procedures are outlined in the Cleaning Fiber Optic Assemblies Technical Note (TN95-010LWP). The cable should be handled conservatively with no excessive axial pulling or lateral tugging.
Handling Precautions
The R485-Type receiver is manufactured with a 39 in. 4 in. (100 cm 10 cm) single-mode fiber pigtail with a 900 m OD PVC outer jacket. Both SC and FCPC connectors are offered on standard versions. Other optical connector options are available on special order. Please contact an Agere Systems Account Manager for availability and ordering information. The minimum fiber bending radius is 1.5 inches (38 mm).
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Agere Systems Inc.
Advance Data Sheet, Rev. 1 October 2001
R485-Type Lightwave Receiver with Clock Recovery for 2.488 Gbits/s Applications
Absolute Maximum Ratings
Stresses in excess of the absolute maximum ratings can cause permanent damage to the device. These are absolute stress ratings only. Functional operation of the device is not implied at these or any other conditions in excess of those given in the operational sections of the data sheet. Exposure to absolute maximum ratings for extended periods can adversely affect device reliability. Parameter Operating Case Temperature Range: APD PIN Storage Temperature Optical Input Power--Biased: APD PIN Supply Voltages Lead Soldering Temperature/Time Symbol TC TC Tstg PIN PIN VCC -- Min 0 -40 -40 -- -- 0 -- Max 70 85 85 0 8 6.5 250/10 Unit C C C dBm dBm V C/s
Characteristics
Table 2. Optical Characteristics At 1.3 m wavelength and 1 x 10-10 BER with 223 - 1 NRZ pseudorandom data. Parameter Measured Average Sensitivity: APD PIN Maximum Input Power: APD PIN Link Status Switching Threshold Decreasing Light Input: APD PIN Flag Response Time Flag Hysteresis Optical Reflectance: Single-mode Fiber Multimode Fiber Symbol PMIN PMIN PMAX PMAX Min* -- -- -8 0 Typ -32 -23 -- -- Max* -30 -21 -- -- Unit dBm dBm dBm dBm
LSTD LSTD tFLAG -- --
-45 -34 3 1.2 -- --
-40 -27 -- -- -- --
-35 -24 1000 -- -27 -14
dBm dBm s dB dB dB
* Over operating temperature range and at end of life. Typical values at room temperature and beginning of life.
Agere Systems Inc.
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R485-Type Lightwave Receiver with Clock Recovery for 2.488 Gbits/s Applications
Advance Data Sheet, Rev. 1 October 2001
Characteristics (continued)
Table 3. Electrical Characteristics Parameter Bit Rate dc Power Supply Voltages Power Consumption Output Data/Clock Single Output Differential Output Voltage: SV DV VFOH VFOL tCDA -- JG JP 0.3 0.6 2.5 0 -- 45 -- -- 0.4 0.8 5.0 0.2 0 50 0.005 -- 1.0 2.0 VCC 0.8 40 55 <0.01 <0.1 Vp-p Vp-p V V ps % Ul rms dB Symbol -- VCC -- Min 2488.07 4.75 -- Typ* 2488.32 5.0 1.3 Max 2488.57 5.25 2.0 Unit Mbits/s V W
Output Flag Voltage: High Low Clock/Data Alignment (see Figure 1) Clock Duty Cycle Jitter Generation Jitter Transfer (see Figure 2) Jitter Tolerance (see Figure 3)
Telcordia TechnologiesTM GR-253-Core and ITU-T G.958 Compliant
* Typical values measured at room temperature and beginning of life. Measured with a 50 to ground. Outputs must be ac-coupled (see Figure 2). TTL output.
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Agere Systems Inc.
Advance Data Sheet, Rev. 1 October 2001
R485-Type Lightwave Receiver with Clock Recovery for 2.488 Gbits/s Applications
Characteristic Curves
DATA CLOCK/DATA ALIGNMENT CLOCK 50%
1-1313(F)
Figure 1. Clock/Data Alignment
10 0 (dB) -10 -20 -30 1 10 100 1k 10k (Hz) 100k 1M 10M
1-1127(F)
Figure 2. Jitter Transfer
100 10 (UIp-p) 1 0.1 0.01 0.001 0.1 1 10 100 1k (Hz) 10k 100k 1M 10M
1-1128(F)
Figure 3. Jitter Tolerance
Agere Systems Inc.
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R485-Type Lightwave Receiver with Clock Recovery for 2.488 Gbits/s Applications
Advance Data Sheet, Rev. 1 October 2001
Qualification and Reliability
The R485-type receiver is scheduled to complete the following qualification tests to meet the intent of Telcordia Technologies GR-468-CORE. Table 4. R485 Qualification Information Test Reference Conditions Condition B 5 times/axis 500 G, 1 ms Condition A 20 G, 20 Hz--2000 Hz 4 min./cycle 4 cycles/axis T = 100 C Code Type R485 R480 R485 R480 Sample Pass/Fail Criteria Size Note
Mechanical Shock MIL-STD-883 Method 2002 Sine Vibration MIL-STD-883 Method 2007
11 Change in Receiver Qualified by Pieces Sensitivity: -1.5 dB T48/P172 11 Change in Receiver Qualified by Pieces Sensitivity: -1.5 dB T48/P172
Thermal Shock Solderability Lead Integrity Solvent Resistance Fiber Pull Accelerating Aging (HTOB)
MIL-STD-883 Method 1011
R485 R480 -- -- -- R485 R480 R485 R480
11 Pieces -- -- --
Physical Attributes Qualified by and Leak Check T48/P172 -- -- -- Qualified by T48 Qualified by T48 Qualified by T48
MIL-STD-883 (Package Supplier Test) Method 2003 MIL-STD-883 (Package Supplier Test) Method 2004 MIL-STD-883 (Package Supplier Test) Method 2015 GR-468-CORE Table 6 MIL-STD-883 Method 1005 1 kg; 3 times; 5 s 85 C under bias, 2000 hours
11 Change in Receiver Qualified by Pieces Sensitivity: -1.5 dB P172 25 Change in Receiver Qualified by Pieces Sensitivity: -1.5 dB T48/P172; Refer to Chip Data 11 Change in Receiver Qualified by Pieces Sensitivity: -1.5 dB T48/P172 11 Change in Receiver Qualified by Pieces Sensitivity: -1.5 dB T48/P172 11 Change in Receiver Qualified by Pieces Sensitivity: -1.5 dB T48/P172 11 Change in Receiver Qualified by Pieces Sensitivity: -1.5 dB T48/P172 6 Pieces Threshold Minimum: 500 V --
High Temperature GR-468-CORE Storage Table 6 Temperature Cycling Temperature Humidity Bias Internal Water Vapor ESD
85 C storage, 2000 hours
R485 R480 R485 R480 R485 R480 R485 R480 R485 R480
GR-468-CORE -40 C to +85 C Section 5.20 100 Cycles for Pass/Fail GR-468-CORE Table 6 MIL-STD-883 Method 1018 GR-468-CORE Section 5.22 85 C/85% RH 1000 hours 5000 ppm Water Vapor Human-Body Model
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Agere Systems Inc.
Advance Data Sheet, Rev. 1 October 2001
R485-Type Lightwave Receiver with Clock Recovery for 2.488 Gbits/s Applications
PWB Layout Guidelines
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The data and clock outputs are designed to drive 50 loads. Clock and data output traces must be controlled-impedance lines and the termination impedance must match the line impedance. Avoid 90 bends in the traces. Paired lines (i.e., DATA and DATA) must be equal in length. Data and clock output lines should be as short and straight as possible and should be shielded from noise sources to prevent noise from feeding back into the receiver. Use high-quality multilayer printed-wiring boards. A ground plane should occupy the area directly beneath the receiver.
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1 H +5 V 0.1 F NOTE 2 8, 22 4, 7, 9, 12, 14--17, 19, 20 VCC 2.2 F + 15 F
1 0.1 F
NIC
50 TRANSMISSION LINE (4X) CLOCK CLOCK 5 6 10 11 0.1 F NOTE 1 50
3 0.1 F
LOS (FLAG)
DATA DATA
1-934(F)xxx
Note 1: Data and clock outputs must be ac-coupled on customer board. Use a 0.1 F chip capacitor with a low ESR. For optimum receiver performance, all four outputs must be terminated in equivalent loads, even if some of the outputs are not being used. Note 2: The 0.1 F VCC power supply bypass capacitors should be high-quality, low ESR chip capacitors that are located as close as possible to the appropriate power supply leads and should provide a low inductance path to the ground plane.
Figure 4. Biasing and Interfacing to the R485-Type 2.5 Gbits/s Receiver
Agere Systems Inc.
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R485-Type Lightwave Receiver with Clock Recovery for 2.488 Gbits/s Applications
Advance Data Sheet, Rev. 1 October 2001
Outline Diagrams
Dimensions are in inches and (millimeters).
1.100 (27.94) 0.014 (0.36) 0.350 (8.89)
0.122 (3.10)
0.495 (12.57)
0.018 (0.48) 2.305 (58.55)
0.710 (18.03) 0.100 (2.54) 0.950 (24.13)
1.000 (25.40) 1.400 (35.56)
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0.144 (3.36)
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BOTTOM VIEW
1-999(F)
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Agere Systems Inc.
Advance Data Sheet, Rev. 1 October 2001
R485-Type Lightwave Receiver with Clock Recovery for 2.488 Gbits/s Applications
Ordering Information
Table 5. Ordering Information for the R485-Type Receiver Code R485CMAA R485FMAA R485WMAA R485JMAA R485CPAA R485FPAA R485WPAA R485JPAA R485CPBB R485FPBB R485WPBB R485JPBB Detector Type APD APD APD APD PIN PIN PIN PIN PIN PIN PIN PIN Connector Type SC/PC FC/PC LC MU SC/PC FC/PC LC MU SC/PC FC/PC LC MU Fiber Type Single-Mode Single-Mode Single-Mode Single-Mode Single-Mode Single-Mode Single-Mode Single-Mode Multimode Multimode Multimode Multimode Comcode 108514597 108514613 TBD TBD 108514605 108514621 TBD TBD TBD TBD TBD TBD
Table 6. Related Product Information Product Code T48 Transmitter Description 2.5 Gbits/s Uncooled Laser Transmitter Document Number DS00-088OPTO
Agere Systems Inc.
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R485-Type Lightwave Receiver with Clock Recovery for 2.488 Gbits/s Applications
Advance Data Sheet, Rev. 1 October 2001
Telcordia Technologies is a trademark of Telcordia Technologies Inc.
For additional information, contact your Agere Systems Account Manager or the following: http://www.agere.com INTERNET: docmaster@agere.com E-MAIL: N. AMERICA: Agere Systems Inc., 555 Union Boulevard, Room 30L-15P-BA, Allentown, PA 18109-3286 1-800-372-2447, FAX 610-712-4106 (In CANADA: 1-800-553-2448, FAX 610-712-4106) ASIA: Agere Systems Hong Kong Ltd., Suites 3201 & 3210-12, 32/F, Tower 2, The Gateway, Harbour City, Kowloon Tel. (852) 3129-2000, FAX (852) 3129-2020 CHINA: (86) 21-5047-1212 (Shanghai), (86) 10-6522-5566 (Beijing), (86) 755-695-7224 (Shenzhen) JAPAN: (81) 3-5421-1600 (Tokyo), KOREA: (82) 2-767-1850 (Seoul), SINGAPORE: (65) 778-8833, TAIWAN: (886) 2-2725-5858 (Taipei) Tel. (44) 7000 624624, FAX (44) 1344 488 045 EUROPE:
Agere Systems Inc. reserves the right to make changes to the product(s) or information contained herein without notice. No liability is assumed as a result of their use or application.
Copyright (c) 2000 Agere Systems Inc. All Rights Reserved Printed in U.S.A.
October 2001 DS01-005OPTO-1 (Replaces DS01-005OPTO)

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