AFCT-5961NLZ Datasheet AFCT-5961ATLZ, AFCT-5961ATGZ, AFCT-5961TLZ | P1-P3

Description

The AFCT-5961TLZ/TGZ/ATLZ/ATGZ/NLZ/NGZ are high

performance, cost eective modules for serial optical

data communications applications specied for a signal

rate of 155 Mb/s. They are designed to provide SONET/

SDH compliant intermediate and long reach links at 155

Mb/s.

All modules are designed for single mode ber and

operate at a nominal wavelength of 1300 nm. They in-

corporate high performance, reliable, long wavelength

optical devices and proven circuit technology to give

long life and consistent service.

The transmitter section of the AFCT-5961TLZ/TGZ/

ATLZ/ATGZ/NLZ/NGZ incorporates a 1300 nm Fabry

Perot (FP) laser. The transmitter has full IEC 825 and

CDRH Class 1 eye safety.

The receiver section uses an MOVPE grown planar PIN

photodetector for low dark current and excellent re-

sponsivity.

A pseudo-ECL compatible logic interface simplies

interface to external circuitry.

These transceivers are supplied in the new industry

standard 2 x 5 DIP style package with the LC ber

connector interface and is footprint compatible with

SFF Multi Source Agreement (MSA).

Features

• RoHS compliant

• AFCT-5961TLZ/ATLZ

Links of 15 km with 9/125 µm single mode ber

(S1.1)

• AFCT-5961NLZ

Links of 40 km with 9/125 µm single mode ber

(L1.1)

• Multisourced 2 x 5 package style with LC receptacle

• Single +3.3 V power supply

• Temperature range:

AFCT-5961TLZ: 0 °C to +70 °C

AFCT-5961ATLZ: -40 °C to +85 °C,

AFCT-5961NLZ: -5 °C to +70 °C

• Wave solder and aqueous wash process compatible

• Manufactured in an ISO9002 certied facility

• Fully Class 1 CDRH/IEC 825 compliant

• LVPECL compatible signal detect output

• Transceivers are available with and without EMI nose

shield (see ordering information details)

Applications

• SONET/SDH equipment interconnect,

OC-3/SDH STM-1 rate

• Long and intermediate reach ATM/SONET links

• Suitable for Fast Ethernet Applications.

AFCT-5961TLZ/TGZ/ATLZ/ATGZ/NLZ/NGZ

Single Mode Laser Small Form Factor Transceivers

for ATM, SONET OC-3/SDH STM-1

Part of the Avago Technologies METRAK family

Data Sheet

Figure 1. Receiver Block Diagram

Functional Description

Receiver Section

Design

The receiver section for the AFCT-5961TLZ/TGZ/ATLZ/

ATGZ/NLZ/NGZ contains an InGaAs/InP photo detector

and a preamplier mounted in an optical subassem-

bly. This optical subassembly is coupled to a postamp/

decision circuit on a circuit board. The design of the

optical assembly is such that it provides better than 14

dB Optical Return Loss (ORL).

The postamplier is ac coupled to the preamplier as il-

lustrated in Figure 1. The coupling capacitors are large

enough to pass the SONET/SDH test pattern at 155 Mb/

s without signicant distortion or performance penalty.

If a lower signal rate, or a code which has signicantly

more low frequency content is used, sensitivity, jitter

and pulse distortion could be degraded.

Figure 1 also shows a lter function which limits the

bandwidth of the preamp output signal. The lter is

designed to bandlimit the preamp output noise and

thus improve the receiver sensitivity.

These components will reduce the sensitivity of the

receiver as the signal bit rate is increased above 155

Mb/s.

Noise Immunity

The receiver includes internal circuit components to

lter power supply noise. However under some condi-

tions of EMI and power supply noise, external power

supply ltering may be necessary (see Application

Section).

The Signal Detect Circuit

The signal detect circuit works by sensing the level

of the received signal and comparing this level to a

TRANS-

IMPEDANCE

PRE-

AMPLIFIER

GND

LVPECL

OUTPUT

BUFFER

LVPECL

OUTPUT

BUFFER

DATA OUT

SIGNAL

DETECT

CIRCUIT

DATA OUT

PHOTODETECTOR

BIAS

FILTER

AMPLIFIER

Figure 2. Simplied Transmitter Schematic

Functional Description

Transmitter Section

Design

A schematic diagram for the transmitter is shown in

Figure 2. The AFCT-5961TLZ/TGZ/ATLZ/ATGZ/NLZ/NGZ

incorporates an FP laser as its optical source. All part

numbers have been designed to be compliant with

IEC 825 eye safety requirements under any single fault

condition and CDRH under normal operating condi-

tions. The optical output is controlled by a custom IC

that detects the laser output via the monitor photodi-

ode. This IC provides both dc and ac current drive to

the laser to ensure correct modulation, eye diagram

and extinction ratio over temperature, supply voltage

and operating life.

DATA

LVPECL

INPUT

LASER

MODULATOR

LASER

LASER BIAS

DRIVER

LASER BIAS

CONTROL

PHOTODIODE

(rear facet monitor)

P1-P3 P4-P6 P7-P9 P10-P12 P13-P15 P16-P16

AFCT-5961NLZ

Mfr. #:

Buy AFCT-5961NLZ

Manufacturer:

Description:

Fiber Optic Transmitters, Receivers, Transceivers Transceive

Lifecycle:

New from this manufacturer.

Delivery:

DHL FedEx Ups TNT EMS

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AFCT-5961NLZ

AFCT-5961NLZ

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