HP RGR1551-DN, RGR1551-FP, RGR1551-SC, RGR1551-ST Datasheet

Fiber Optic “Light to Logic”
Receiver with Clock Recovery

Preliminary Technical Data

RGR1551

Features

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

• Long Reach, High
Performance

• Sensitivity:

–36 dBm

• Phase-Locked Loop (PLL)
Timing Recovery Circuit

• Meets SONET Jitter
Tolerance Requirements
(CCITT G.958)

• Single +5 V Supply,
Typically <700 mW

• SONET OC3 and SDH STM1
Compatible

• 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

• Digital Cable TV Networks

Description

The RGR1551 receiver provides
optical signal conversion and
processing. It converts 1200 nm

to 1600 nm wavelength light
wave information into an
electrical signal at a data rate of
155 Mb/s.

The receiver contains an InGaAs
PIN photodiode, a high sensitiv­ity, wide dynamic range transim­pedance amplifier, capacitively
coupled to a PLL based clock
recovery circuit. The clock and
data outputs are retimed
complementary PECL.

A complementary CMOS
compatible low light alarm is also
provided.

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.

412 (5/97)

Connection Diagram

Top View

FIBER PIGTAIL

GND
GND

GND
CLOCK
CLOCK

GND

DATA

GND

DATA

PD BIAS

1
2
3
4
5
6
7
8
9
10

Pin Descriptions

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

These pins should be connected
to the circuit ground.

Pins 4, 5, CLOCK, CLOCK:

These pins provide complemen­tary differential PECL CLOCK
and CLOCK outputs.

Pins 7, 9, DATA, DATA:

These pins provide complemen­tary differential PECL DATA and
DATA outputs.

The RGR1551 DATA output is
noninverting, an optical pulse

20
19
18
17
16
15
14
13
12
11

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

causes the DATA output to go to
the PECL logic high state (+4 V
nominal).

Pin 10, PD Bias:

This pin must be connected to
any voltage between 0 V (GND)
and –5 V. This provides the photo­diode bias. The current drawn is
directly proportional to the
average received photocurrent.

I = Responsivity 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 ALARM and ALARM outputs.

This is the low light alarm.
ALARM goes to a logic low
(CMOS compatible) 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.

Pins 17, 18, 19, 20, NC:

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

PIN 11

1 µH

100 nF 100 nF10 µF

+5 V

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