R485 AGERE | Alldatasheet
Document overview
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Technical content
Features
■ Multisourced footprint ■ Internal APD bias supply ■ Differential data and clock outputs ■ APD and PIN versions ■ T ypical sensitivity: —APD, –32 dBm —PIN, –23 dBm ■ Operation at 1.3 µm or 1.55 µm ■ 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 ■ Agere Systems Inc. Reliability and Qualification Program for built-in quality ■ SONET/SDH compatible for OC-48/STM-16 data rate
Applications
■ T elecommunications — Inter- and intraoffice SONET/SDH — Subscriber loop — Metropolitan area networks ■ High-speed data communications
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 µm to 1.6 µm 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 indi- cates when there is a loss of optical signal. The receiver is manufactured in a low-profile, pig- tailed, 24-pin plastic DIP package. It requires a sin- gle, +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 pro- vides the necessary temperature compensation for the APD.
Table 1. Pin Information nally. The user should not make any connections to these pins. threshold (DTV) is not made adjustable. ager for availability and ordering information. a result of electrostatic discharge (ESD). susceptibility testing and protection design evaluation. ness in mind, care should be used during handling. The optical connector should be kept free from dust. blies Technical Note (TN95-010LWP). excessive axial pulling or lateral tugging.
1 NIC 24 NUC*
2 NUC* 23 NUC*
4 Ground 21 NUC*
6 CLOCK 19 Ground
7 Ground 18 NIC
9 Ground 16 Ground
10 DA TA 15 Ground
11 DA TA
14 Ground
12 Ground 13 DTV/NIC ‡
periods can adversely affect device reliability. Table 2. Optical Characteristics At 1.3 µm wavelength and 1 x 10–10 BER with 223 – 1 NRZ pseudorandom data.
- Over operating temperature range and at end of life.
†Typical values at room temperature and beginning of life.
Table 3. Electrical Characteristics
- T ypical values measured at room temperature and beginning of life.
†Measured with a 50 Ω to ground. Outputs must be ac-coupled (see Figure 2).
Table 4. R485 Qualification Information
500 G, 1 ms
20 G, 20 Hz—2000 Hz
100 Cycles for Pass/Fail
■ The data and clock outputs are designed to drive 50 Ω loads. sources to prevent noise from feeding back into the receiver. formance, all four outputs must be terminated in equivalent loads, even if some of the outputs are not being used. 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
Advance Data Sheet, Rev. 1 October 2001Recovery for 2.488 Gbits/s Applications R485-Type Lightwave Receiver with Clock 8 Agere Systems Inc. Outline Diagrams Dimensions are in inches and (millimeters). 1-999(F) 1.100 (27.94) 0.495 (12.57) 0.018 (0.48) 0.100 (2.54) 0.710 (18.03) 2.305 (58.55) 0.950 (24.13) 0.122 (3.10) 0.014 (0.36) 13 24 12 1 0.144 (3.36) BOTTOM VIEW 0.350 (8.89) 1.000 (25.40) 1.400 (35.56)
Advance Data Sheet, Rev. 1 October 2001 Recovery for 2.488 Gbits/s Applications R485-Type Lightwave Receiver with Clock Agere Systems Inc. 9
Ordering Information
Table 5. Ordering Information for the R485-Type Receiver Table 6. Related Product Information
Advance Data Sheet, Rev. 1 October 2001Recovery for 2.488 Gbits/s Applications R485-Type Lightwave Receiver with Clock 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 © 2000 Agere Systems Inc. All Rights Reserved Printed in U.S.A. October 2001 DS01-005OPTO-1 (Replaces DS01-005OPTO) For additional information, contact your Agere Systems Account Manager or the following: INTERNET: http://www.agere.com E-MAIL: docmaster@agere.com N. AMERICA: Agere Systems Inc., 555 Union Boulevard, Room 30L-15P-BA, Allentown, P A 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 , T ower 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 (T okyo), KOREA: (82) 2-767-1850 (Seoul), SINGAPORE: (65) 778-8833, T AIWAN: (886) 2-2725-5858 (Taipei) EUROPE: Tel. (44) 7000 624624, FAX (44) 1344 488 045 Telcordia Technologies is a trademark of Telcordia Technologies Inc.