R480 Datasheet, PDF (1/8 Pages) Agere Systems – R480-Type Lightwave Receiver with CML Data Output for up to 2.488 Gbits/s Applications

Data Sheet, Rev. 1
September 2001
R480-Type Lightwave Receiver with CML Data Output
for up to 2.488 Gbits/s Applications
Applications
s Telecommunications:
— Inter- and intraoffice SONET/SDH
— Subscriber loop
— Metropolitan area networks
s High-speed data communications
Manufactured in a low-profile, 24-pin package, the R480-Type
receiver features either an avalanche or PIN photodetector, a
transimpedance amplifier, and a limiting amplifier IC.
Features
s Multisourced footprint
s Internal APD bias supply
s Differential CML data output
s APD and PIN versions
s Typical sensitivity:
—APD, –32 dBm
—PIN, –23 dBm
s Operation at 1.3 µm or 1.55 µm
s TTL link status flag
s Wide operating case temperature range:
—APD, 0 °C to +85 °C
—PIN, –40 °C to +85 °C
s Space-saving, self-contained, 24-pin DIP
s Agere Systems Inc. Reliability and Qualification
Program for built-in quality
s SONET/SDH compatible for OC-48/STM-16 data
rate
Description
The R480-Type 2.5 Gbits/s lightwave receiver is
designed for use in SONET and synchronous digital
hierarchy (SDH) telecommunications applications up
to OC-48 and STM-16 data rates, and high-speed
data communications applications. The receiver con-
verts received optical signals in the range of 1.2 µm
to 1.6 µm wavelength into differential CML data out-
puts. The receiver consists of either an InGaAs APD
or PIN photodetector (depending on model selected),
a transimpedance amplifier, and a limiting amplifier
that provides differential CML data output. A TTL
compatible link status flag signal indicates 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. An analog photodetector monitor provides a
voltage proportional to the optical input level voltage
(OILV).