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R485FPBB

R485-Type Lightwave Receiver with Clock Recovery for 2.488 Gb/s Applications

TriQuint Semiconductor 

Data Sheet

March 2003

R485-Type Lightwave Receiver with Clock Recovery

for 2.488 Gb/s Applications

TriQuint OPTOELERC4TR8O5NIR®CeS,cINeCiv. er

Applications

s Telecommunications

— Inter- and intraoffice SONET/SDH

— Subscriber loop

— Metropolitan area networks

s High-speed data communications

Description

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.

Features

s Multisourced footprint

s Internal APD bias supply

s Differential data and clock outputs

s APD and PIN versions

s Typical sensitivity:

—APD, –34 dBm

—PIN, –23 dBm

s Operation at 1.3 µm or 1.55 µm

s TTL link status flag

s Analog input power monitor output (OILV)

s Wide operating case temperature range:

–40 °C to +85 °C

s Space-saving, self-contained, 24-pin DIP

s Reliability and Qualification Program for built-in qual-

ity

s SONET/SDH compatible for OC-48/STM-16 data

rate

The R485-Type 2.5 Gb/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 sig-

nal. 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 neces-

sary temperature compensation for the APD. An ana-

log photodetector power monitor provides a voltage

linearly proportional to the input power level.

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