AFCT-5943GZ

AFCT-5943GZ Datasheet

AFCT-5943xxZ Single Mode SFF Transceivers for SONET OC-48/SDH STM-16 Multirate Operation Part of the Avago Technologies’ METRAK family

Part	Datasheet
AFCT-5943GZ	AFCT-5943GZ (pdf)

Related Parts	Information
AFCT-5943AGZ	AFCT-5943AGZ

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AFCT-5943xxZ Single Mode SFF Transceivers for SONET OC-48/SDH STM-16 Multirate Operation Part of the Avago Technologies’ METRAK family Data Sheet The AFCT-5943xxZ are high performance, cost effective modules for serial optical data communications applications that range from 125 Mb/s to Gb/s. They are designed to provide SONET/SDH compliant links at 2488 Mb/s for short reach links. The modules are designed for single mode fiber and operate at a nominal wavelength of 1300 nm. They incorporate high performance, reliable, long wavelength optical devices and proven circuit technology to give long life and consistent service. The transmitter section of the AFCT-5943LZ/ALZ/GZ/ AGZ incorporates a 1300 nm Fabry Perot FP laser. The transmitter has full IEC 825 and CDRH Class 1 eye safety. For each device the receiver section uses an MOVPE grown planar SEDET PIN photodetector for low dark current and excellent responsivity. A positive ECL logic interface simplifies interface to external circuitry. The transceivers are supplied in the new industry standard 2 x 5 DIP style package with the LC fiber connector interface and is footprint compatible with SFF Multi Source Agreement MSA . • Multirate operation from 125 Mb/s to Gb/s • AFCT-5943LZ/ALZ Links of 2 km with 9/125 µm single mode fiber SMF • Multisourced 2 x 5 package style with LC receptacle • Single V power supply • Temperaturerange: AFCT-5943LZ/GZ 0°C to +70°C AFCT-5943ALZ/AGZ -40°C to +85°C • Wave solder and aqueous wash process compatible • Manufactured in an ISO9002 certified facility • RoHS compliant • Fully Class 1 CDRH/IEC 825 compliant • Compliant with ITU-T G.957, STM-16, I-16 and S-16.1 Optical Interfaces • AFCT-5943LZ/ALZ with EMI shield • AFCT-5943GZ/AGZ without EMI shield • Receiver output squelch function enabled • SONET/SDH equipment interconnect • Multirate Client Interface on Metro Gateways and Edge Switches Functional Description Receiver Section Design The receiver section for the AFCT-5943xxZ contains an InGaAs/InP photo detector and a preamplifier mounted in an optical subassembly. 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 27 dB Optical Return Loss ORL . The postamplifier is ac coupled to the preamplifier as illustrated in Figure The coupling capacitors are large enough to pass the SONET/SDH test pattern at 155 Mb/ s, 622 Mb/s and 2488 Mb/s without significant distortion or performance penalty. For multirate applications the sensitivity will meet the maximum SONET specification for OC48 across all datarates -19 dBm , also for DC balanced codes, e.g. 8B/10B. For codes which have a significantly lower frequency content, jitter and pulse distortion could be degraded. The receiver outputs are squelched at Signal Detect deasserts. That is, when the light input decreases to typical -27 dBm or less, the Signal Detect deasserts i.e. the SD Output goes to a PECL low state. This forces the DATA OUT and DATA OUT Bar to go PECL levels high and low respectively. Figure 1 also shows a filter function which limits the bandwidth of the preamp output signal. The filter 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 Gb/s. Noise Immunity The receiver includes internal circuit components to filter power supply noise. However under some conditions of EMI and power supply noise, external power supply filtering may be necessary see Application Section . The Signal Detect Circuit The signal detect circuit works by sensing the peak level of the received signal and comparing this level to a reference. The SD output is low voltage TTL. TRANSIMPEDANCE PREAMPLIFIER FILTER AMPLIFIER PECL OUTPUT BUFFER DATA OUT DATA OUT GND Figure Receiver Block Diagram SIGNAL DETECT CIRCUIT TTL OUTPUT BUFFER Functional Description Transmitter Section Design A schematic diagram for the transmitter is shown in Figure The AFCT-5943LZ/ALZ/GZ/AGZ incorporates an FP laser and has been designed to be compliant with IEC 825 eye safety requirements under any single fault condition and CDRH under normal operating conditions. The optical output is controlled by a custom IC that detects the laser output via the monitor photodiode. 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 PECL INPUT LASER MODULATOR FP LASER PHOTODIODE rear facet monitor LASER BIAS DRIVER Ordering Information 1300 nm FP Laser Temperature range 0°C to +70°C AFCT-5943LZ AFCT-5943GZ 1300 nm FP Laser Temperature range -40°C to +85°C AFCT-5943ALZ AFCT-5943AGZ Handling Precautions The AFCT-5943xxZ can be damaged by current surges or overvoltage. Power supply transient precautions should be taken. Normal handling precautions for electrostatic sensitive devices should be taken. Class 1 Laser Product: This product conforms to the applicable requirements of 21 CFR 1040 at the date of manufacture Date of Manufacture Avago Technologies Inc., No 1 Yishun Ave 7, Singapore For product information and a complete list of distributors, please go to our web site: Avago, Avago Technologies, and the A logo are trademarks of Avago Technologies, Limited in the United States and other countries. Data subject to change. Copyright 2007 Avago Technologies Limited. All rights reserved. Obsoletes AV01-0628EN AV02-0178EN - December 5, 2007

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AFCT-5943xxZ Single Mode SFF Transceivers for SONET OC-48/SDH STM-16 Multirate Operation Part of the Avago Technologies’ METRAK family

Data Sheet

The AFCT-5943xxZ are high performance, cost effective modules for serial optical data communications applications that range from 125 Mb/s to Gb/s. They are designed to provide SONET/SDH compliant links at 2488 Mb/s for short reach links.

The modules are designed for single mode fiber and operate at a nominal wavelength of 1300 nm. They incorporate high performance, reliable, long wavelength optical devices and proven circuit technology to give long life and consistent service.

The transmitter section of the AFCT-5943LZ/ALZ/GZ/ AGZ incorporates a 1300 nm Fabry Perot FP laser. The transmitter has full IEC 825 and CDRH Class 1 eye safety.

For each device the receiver section uses an MOVPE grown planar SEDET PIN photodetector for low dark current and excellent responsivity.

A positive ECL logic interface simplifies interface to external circuitry.

The transceivers are supplied in the new industry standard 2 x 5 DIP style package with the LC fiber connector interface and is footprint compatible with SFF Multi Source Agreement MSA .
• Multirate operation from 125 Mb/s to Gb/s
• AFCT-5943LZ/ALZ Links of 2 km with 9/125 µm
single mode fiber SMF
• Multisourced 2 x 5 package style with LC receptacle
• Single V power supply
• Temperaturerange:

AFCT-5943LZ/GZ 0°C to +70°C AFCT-5943ALZ/AGZ -40°C to +85°C
• Wave solder and aqueous wash process compatible
• Manufactured in an ISO9002 certified facility
• RoHS compliant
• Fully Class 1 CDRH/IEC 825 compliant
• Compliant with ITU-T G.957, STM-16, I-16 and S-16.1 Optical Interfaces
• AFCT-5943LZ/ALZ with EMI shield
• AFCT-5943GZ/AGZ without EMI shield
• Receiver output squelch function enabled
• SONET/SDH equipment interconnect
• Multirate Client Interface on Metro Gateways and

Edge Switches

Functional Description Receiver Section

Design

The receiver section for the AFCT-5943xxZ contains an InGaAs/InP photo detector and a preamplifier mounted in an optical subassembly. 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 27 dB Optical Return Loss ORL .

The postamplifier is ac coupled to the preamplifier as illustrated in Figure The coupling capacitors are large enough to pass the SONET/SDH test pattern at 155 Mb/ s, 622 Mb/s and 2488 Mb/s without significant distortion or performance penalty. For multirate applications the sensitivity will meet the maximum SONET specification for OC48 across all datarates -19 dBm , also for DC balanced codes, e.g. 8B/10B. For codes which have a significantly lower frequency content, jitter and pulse distortion could be degraded.

The receiver outputs are squelched at Signal Detect deasserts. That is, when the light input decreases to typical -27 dBm or less, the Signal Detect deasserts i.e. the SD Output goes to a PECL low state. This forces the DATA OUT and DATA OUT Bar to go PECL levels high and low respectively.

Figure 1 also shows a filter function which limits the bandwidth of the preamp output signal. The filter 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 Gb/s.

Noise Immunity

The receiver includes internal circuit components to filter power supply noise. However under some conditions of EMI and power supply noise, external power supply filtering may be necessary see Application Section .

The Signal Detect Circuit

The signal detect circuit works by sensing the peak level of the received signal and comparing this level to a reference. The SD output is low voltage TTL.

TRANSIMPEDANCE PREAMPLIFIER

FILTER

AMPLIFIER

PECL OUTPUT BUFFER

DATA OUT DATA OUT

GND Figure Receiver Block Diagram

SIGNAL DETECT CIRCUIT

TTL OUTPUT BUFFER

Functional Description Transmitter Section

Design

A schematic diagram for the transmitter is shown in Figure The AFCT-5943LZ/ALZ/GZ/AGZ incorporates an FP laser and has been designed to be compliant with IEC 825 eye safety requirements under any single fault condition and CDRH under normal operating conditions. The optical output is controlled by a custom IC that detects the laser output via the monitor photodiode. 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

PECL INPUT

LASER MODULATOR

FP LASER

PHOTODIODE rear facet monitor

LASER BIAS DRIVER
Ordering Information 1300 nm FP Laser Temperature range 0°C to +70°C

AFCT-5943LZ AFCT-5943GZ
1300 nm FP Laser Temperature range -40°C to +85°C

AFCT-5943ALZ AFCT-5943AGZ

Handling Precautions

The AFCT-5943xxZ can be damaged by current surges or overvoltage. Power supply transient precautions should be taken.

Normal handling precautions for electrostatic sensitive devices should be taken.

Class 1 Laser Product:

This product conforms to the applicable requirements of 21 CFR 1040 at the date of manufacture Date of Manufacture Avago Technologies Inc., No 1 Yishun Ave 7, Singapore

For product information and a complete list of distributors, please go to our web site:

Avago, Avago Technologies, and the A logo are trademarks of Avago Technologies, Limited in the United States and other countries. Data subject to change. Copyright 2007 Avago Technologies Limited. All rights reserved. Obsoletes AV01-0628EN AV02-0178EN - December 5, 2007

Notice: we do not provide any warranties that information, datasheets, application notes, circuit diagrams, or software stored on this website are up-to-date or error free. The archived AFCT-5943GZ Datasheet file may be downloaded here without warranties.

Datasheet ID: AFCT-5943GZ 520069