HP RCV1551-DN, RCV1551-FP, RCV1551-SC, RCV1551-ST Datasheet

Fiber Optic “Light to Logic”
Receiver

Preliminary Technical Data

RCV1551

Features

• Light to Logic 20-pin DIP
Receiver Offers ECL
Compatibility

• Long Reach, High
Performance

• Sensitivity -35 dBm

• Single +5 V Supply

• SONET/SDH Compliant

• Multisourced

Applications

• Telecommunication
Networks

• SONET OC3 and SDH STM1
Compatible

• Local and Metropolitan Area
Networks

• ATM Single Mode Public
Network

• Military Communications
and Control Systems
Performance

• Digital Cable TV Networks

Description

The RCV1551 receiver provides
optical signal conversion and
processing. It contains an InGaAs
PIN photodiode and high
sensitivity, wide dynamic range,
transimpedance amplifier,
capacitively coupled to limiting
amplifier stages with PECL
output drivers. Also provided is a
loss of signal alarm.

The planar PIN photodiode
operates throughout the 1200 nm
to 1600 nm wavelength band. A
CMOS wide dynamic range
transimpedance amplifier
optimized for 155 MBd operation
provides low noise front end gain
for the RCV1551.

A low pass filter maximizes the
signal to noise ratio while
minimizing intersymbol
interference. The interface
amplifier provides signal
conversion and buffering for the
PECL complementary data
outputs. A complementary PECL
alarm output is also provided.

The receiver operates from +5 V
and -5.2 V or +5 V and Ground
power supplies. A 50/125 micron
multimode fiber pigtail is
included, assuring compatibility
with multimode and single mode
fiber optic systems.

Preliminary Product Disclaimer

This preliminary data sheet is provided to assist you in the evaluation of engineering samples of the product which is under development
and targeted for release during 1997. Until Hewlett-Packard releases this product for general sales, HP reserves the right to alter prices,
specifications, features, capabilities, function, manufacturing release dates, and even general availability of the product at any time.

418 (5/97)

Connection Diagram

Top View

FIBER PIGTAIL

GND
GND
GND
GND

NC

GND

DATA

GND

DATA

PD BIAS

1
2
3
4
5
6
7
8
9
10

Pin Descriptions

Pins 5, 17, 18, 19, 20 NC:

These pins are not connected and
should be left open circuit on the
application PCB.

Pins 1, 2, 3, 4, 6, 8, 13, 15, 16
GND:

These pins should be connected
to the circuit ground.

Pins 7, 9, DATA, DATA:

These pins provide complemen­tary PECL DATA and DATA
outputs. The DATA output is
noninverting, an optical pulse
causes the DATA output to go to
the PECL logic high state (+4 V
nominal).

20
19
18
17
16
15
14
13
12
11

NC
NC
NC
NC
GND
GND
ALARM
GND
ALARM
+5 V

Pin 10, PD Bias:

This pin must be connected to
any voltage from 0 V (GND) to

-5 V. This provides the
photodiode bias. The current
drawn is directly proportional
to the average received
photocurrent.

I = Responsitivity x Mean Power.
The responsivity will be between

0.7 A/W and 1.0 A/W.

Pin 11, +5 V:

This pin should be connected to
+5 V supply. The network shown
below should be placed as close
as possible to pin 11.

Pins 12, 14 ALARM, ALARM:

These pins provide complemen­tary differential ALARM and
ALARM outputs. This is the low
light alarm. ALARM goes to a
logic low (3.3 V nominal) state
when the optical power drops
below the threshold level
(insufficient optical power).

The optical power must increase
to a higher level than the level
where the alarm went low before
ALARM will return to a logic
high. This difference is the alarm
hysteresis.

PIN 11

1 µH

100 nF 100 nF10 µF

+5 V

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