AFCT-5942LZ

AFCT-5942LZ Datasheet

AFCT-5942xxxZ Single Mode SFF Transceivers for SONET OC-48/SDH STM-16 Singlerate Operation Part of the Avago Technologies’ METRAK family

Part	Datasheet
AFCT-5942LZ	AFCT-5942LZ (pdf)

Related Parts	Information
AFCT-5942GZ	AFCT-5942GZ
AFCT-5942ATLZ	AFCT-5942ATLZ
AFCT-5942ATGZ	AFCT-5942ATGZ
AFCT-5942ALZ	AFCT-5942ALZ
AFCT-5942TLZ	AFCT-5942TLZ
AFCT-5942TGZ	AFCT-5942TGZ
AFCT-5942AGZ	AFCT-5942AGZ

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AFCT-5942xxxZ Single Mode SFF Transceivers for SONET OC-48/SDH STM-16 Singlerate Operation Part of the Avago Technologies’ METRAK family Data Sheet The AFCT-5942xxxZ are high performance, cost effective modules for serial optical data communications applications. They are designed to provide SONET/SDH compliant links at 2488 Mb/s for both short and intermediate 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-5942LZ/ALZ/GZ/ AGZ incorporates a 1300 nm Fabry Perot FP laser. The transmitter in the AFCT-5942TLZ/ATLZ/TGZ/ATGZ uses a Distributed Feedback DFB 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 10 DIP style package with the LC fiber connector interface and is footprint compatible with SFF Multi Source Agreement MSA . • AFCT-5942LZ/ALZ Links of 2 km with 9/125 µm single mode fiber SMF • AFCT-5942TLZ/ATLZ Links of 15 km with 9/125 µm single mode fiber SMF • Multisourced 2 x 10 package style with LC receptacle • Single V power supply • Temperature range: AFCT-5942LZ/GZ: 0°C to +70°C AFCT-5942TLZ/TGZ 0°C to +70°C AFCT-5942ALZ/AGZ -40°C to +85°C AFCT-5942ATLZ/ATGZ -20°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-5942LZ/ALZ/TLZ/ATLZ With EMI shield • AFCT-5942GZ/AGZ/TGZ/ATGZ Without EMI shield • Receiver output squelch function enabled • SONET/SDH equipment interconnect • Client Interface on Metro Gateways and Edge Switches Functional Description Receiver Section Design The receiver section for the AFCT-5942xxxZ 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 2488 Mb/s without significant distortion or performance penalty. 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 TTL 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. As an optional feature the device also incorporates a photodetector bias circuit. The circuit works by providing a mirrored output of the bias current within the photodiode. This output must be connected to VCC and can be monitored by connecting through a series resistor see Application Section . 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. PHOTODETECTOR BIAS TRANSIMPEDANCE PREAMPLIFIER FILTER AMPLIFIER PECL OUTPUT BUFFER DATA OUT DATA OUT GND Figure Receiver Block Diagram SIGNAL DETECT TTL OUTPUT CIRCUIT BUFFER Ordering Information 1300 nm FP Laser Temperature range 0°C to +70°C AFCT-5942LZ AFCT-5942GZ 1300 nm FP Laser Temperature range -40°C to +85°C AFCT-5942ALZ AFCT-5942AGZ 1300 nm DFB Laser Temperature range 0°C to +70°C AFCT-5942TLZ AFCT-5942TGZ 1300 nm DFB Laser Temperature range -20°C to +85°C AFCT-5942ATLZ AFCT-5942ATGZ Handling Precautions The AFCT-5942xxxZ 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 in the United States and other countries. Data subject to change. Copyright 2005-2009 Avago Technologies. All rights reserved. AV02-0811EN - June 1, 2009

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AFCT-5942xxxZ Single Mode SFF Transceivers for SONET OC-48/SDH STM-16 Singlerate Operation Part of the Avago Technologies’ METRAK family

Data Sheet

The AFCT-5942xxxZ are high performance, cost effective modules for serial optical data communications applications. They are designed to provide SONET/SDH compliant links at 2488 Mb/s for both short and intermediate 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-5942LZ/ALZ/GZ/ AGZ incorporates a 1300 nm Fabry Perot FP laser. The transmitter in the AFCT-5942TLZ/ATLZ/TGZ/ATGZ uses a Distributed Feedback DFB 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 10 DIP style package with the LC fiber connector interface and is footprint compatible with SFF Multi Source Agreement MSA .
• AFCT-5942LZ/ALZ Links of 2 km with 9/125 µm single mode fiber SMF
• AFCT-5942TLZ/ATLZ Links of 15 km with 9/125 µm single mode fiber SMF
• Multisourced 2 x 10 package style with LC receptacle
• Single V power supply
• Temperature range:

AFCT-5942LZ/GZ:
0°C to +70°C

AFCT-5942TLZ/TGZ 0°C to +70°C

AFCT-5942ALZ/AGZ -40°C to +85°C

AFCT-5942ATLZ/ATGZ -20°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-5942LZ/ALZ/TLZ/ATLZ With EMI shield
• AFCT-5942GZ/AGZ/TGZ/ATGZ Without EMI shield
• Receiver output squelch function enabled
• SONET/SDH equipment interconnect
• Client Interface on Metro Gateways and Edge Switches

Functional Description Receiver Section

Design

The receiver section for the AFCT-5942xxxZ 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 2488 Mb/s without significant distortion or performance penalty. 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 TTL 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.

As an optional feature the device also incorporates a photodetector bias circuit. The circuit works by providing a mirrored output of the bias current within the photodiode. This output must be connected to VCC and can be monitored by connecting through a series resistor see Application Section .

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.

PHOTODETECTOR BIAS

TRANSIMPEDANCE PREAMPLIFIER

FILTER

AMPLIFIER

PECL OUTPUT BUFFER

DATA OUT DATA OUT

GND Figure Receiver Block Diagram

SIGNAL DETECT

TTL OUTPUT

CIRCUIT

BUFFER
Ordering Information 1300 nm FP Laser Temperature range 0°C to +70°C

AFCT-5942LZ AFCT-5942GZ
1300 nm FP Laser Temperature range -40°C to +85°C

AFCT-5942ALZ AFCT-5942AGZ
1300 nm DFB Laser Temperature range 0°C to +70°C

AFCT-5942TLZ AFCT-5942TGZ
1300 nm DFB Laser Temperature range -20°C to +85°C

AFCT-5942ATLZ AFCT-5942ATGZ

Handling Precautions

The AFCT-5942xxxZ 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 in the United States and other countries. Data subject to change. Copyright 2005-2009 Avago Technologies. All rights reserved. AV02-0811EN - June 1, 2009

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Datasheet ID: AFCT-5942LZ 520068