Agere Systems R768 DATA SHEET

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R768-Type OC-768/STM-256
Lightweight Receiver

Advance Data Sheet

September 2000

Features

High data rate capability, 40 Gbits/s

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PIN photodetector

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Fully operational through the L-band (1.6 µm)

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wavelength range
Single-mode fiber pigtail with FC/PC optical con-

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nector

The R768 Receiver is manufactured in a 16-pin, pigtailed sur­face-mount metal pa ckage with a single - en ded V-con nec t or.

Operating case temperature range:

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0 °C to 65 °C

Compact, butterfly package

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Applications

Line terminal e quipment

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High-speed networks up to 40 Gbits/s

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SONET OC-768 and SDH S TM-256 telecommuni-

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cations applications
Extended-reach datacom and telecom applications

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Digital video

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R768-Type OC-768/STM-256
Lightwei ght R ece iver

Advance Data Sheet

September 2000

Description

Receiver Operation

The R768 40 Gbits/s fiber-optic receiver consists of a
high-speed photodetector (PIN) and a wide-band linear
preamp in a pigtailed surface-mount metal package
with a single-ended V-connector. It is designed for use
in single-mode, high-speed telecommunication applica­tions at the SONET OC-768 and the ITU-T SDH
STM-256 data rate of 42.5 Gbits/s.

The operating case temperature range for the receiver
is 0 °C to 65 °C.

The receiver is manufactured in a compact, 16-pin sur­face-mount package with a single-mode optical fiber
pigtail. The fiber pigtail is internally beveled for low
return loss and is available with an FC-PC optical con­nector.

The received data is dc-coupled.
The receiver requires only a 6 V power supply for oper-

ation, plus an optional V
(see pin descriptions). The photodiode requires a sep­arate bias voltage: for the PIN, a nominal reverse bias
of 4 V is required.

ADJUST

from –1.0 V to +1.0 V

Pin Information

Table 1. Pin Descriptions

Pin Number Name

1 Not Used
2GND
3 Alternate P
4GND
5GND
6GND
7V
8GND

9GND
10 GND
11 GND
12 V
13 GND
14 PIN Bias
15 GND
16 NC

ADJUST

Bias

IN

(optional)

CC

2 Agere Systems Inc.