HFM1300 Ethernet Receiver FIBER-86.TIF FEATURES • -34 dBm to -11 dBm sensitivity • Differential data outputs (ECL compatible) • Signal Quality Detect and Packet Detect outputs (open collector) • Adjustable signal quality detect level • ST interface • 500 Ω output drive capability • Monolithic design - less board space, high reliability • Singlemode version DESCRIPTION The HFM1300 Ethernet fiber optic receiver module is designed for use in computer LAN (10 Mb/s Ethernet) applications. The 16 pin DIP module is intended for use in applications such as IEEE 802.3 10BASEFA and FOIRL signal standards in reasonable operating environment. A PIN photodiode plus pre-amp is mounted in the fiber optic connector for maximum shielding, and provides amplification and current-to-voltage conversion. The post-amp IC provides final amplification to the logic output levels (see BLOCK DIAGRAM). Signal Quality Detect, Packet Detect and Differential Data outputs in both ST and SMA versions are available. Differential ECL compatible data minimizes pulse width distortion and allows capacitive coupling to ECL logic. The HFM1300 has a 500 Ω output drive capability on each data output. An internally regulated power supply increases power supply rejection. Case ground is separated from circuit ground, allowing feedthrough mounting of the barrel. REF. FIBER-26.DIM APPLICATION Average-to-peak input level monitoring aids in the generation of the signal quality logic signal (SQ) when the input level is adequate for 10-10 BER. The open collector output timing response of SQ is intended to meet 802.3 requirements over -32 dBm to -11 dBm average power levels. An additional current source output (SQLED) is available to drive an external LED indicator (LED ON indicates poor signal quality). If this output is not used, it should be tied to +12 V. OUTLINE DIMENSIONS in inches Notes 1. ST is a registered trademark of AT & T. Resistor Radj adjusts the SQ threshold upward. A 70 µA current from this node to ground increases the threshold by 1 dB of optical power. Radj’s high side is at 4.3 V (nominal). 548 Honeywell reserves the right to make changes in order to improve design and supply the best products possible. HFM1300 Ethernet Receiver APPLICATION (continued) The open collector output (PKT) indicates presence of a valid Ethernet packet. This output goes low following the first two data edges that are 200 ns or less apart at the start of a packet. It returns high before the end of the first half cycle of a valid 1 MHz idle signal. The HFM1300 is designed to operate with a 12 V supply (normally present in FOIRL interfaces and personal computer backplanes). The module requires a minimum +8.5 V total voltage. If a +12 V supply is not available, +5 V to VCC pin and -5 V to GND pin will operate the module. Since the outputs are typically AC coupled, this voltage shift is generally not a problem. The HONEYWELL HFM1300 module is designed to work with SINGLEMODE fibers. Final testing is performed with 10 m 9/125 µm fiber. Honeywell reserves the right to make changes in order to improve design and supply the best products possible. 549 HFM1300 Ethernet Receiver ELECTRO-OPTICAL CHARACTERISTICS (Over 0 to 70°C, VCC = 11.25 to 15.75 VDC unless otherwise noted) PARAMETER Data Rate Input Power Supply Current Propagation Delay Jitter (uncorrelated) Pulse Width Distortion SYMBOL MIN -34 32 28 0.35 Signal Quality Detect (SQ) 3.0 Delay of Packet Start End of Packet Delay Optical Idle Signal Frequency Duty Cycle Output (Out1/Out2) Load Output Swing -11 43 40 0.5 4.0 UNITS Mbd dBm mA ns ns ns 4.0 20.0 dBm average µs µs TEST CONDITIONS Manchester coding Average power (10-10 BER) Excluding SQ, SQLED, PKT RMS, -32 dBm average input SQ Low, -11 dBm average input Threshold for 10-10 BER PIN > -32 dBm average PIN < -11 dBm average Bit times @ 10 Mbd (with < 20 pF and 4 kΩ load) 2.0 4.0 0.85 45 500 1.0 SQ/PKT VOL SQLED Sink Current 1.0 1.25 55 1.6 +1000 0.4 12.0 ABSOLUTE MAXIMUM RATINGS (25°C Free-Air Temperature unless otherwise noted) 8.5 to 15.75 V -40 to +85°C Notes Stresses greater than those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. This is a stress rating only and functional operation of the device at these or any other conditions above those indicated in the operational section of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods of time may affect reliability. 550 MAX -35 Delay Time (acceptable level) Delay Time (unacceptable level) Packet Detection (PKT) Supply voltage (VCC) Temperature TYP 10 MHz % Ω V ppm/°C V mA PKT signal detection Peak to peak Over temperature IOL ≤ 3 mA RECOMMENDED OPERATING CONDITIONS Supply voltage (VCC) Temperature 11.25 to 12.75 V 0 to +70°C ORDER GUIDE Description Fiber optic Ethernet receiver, 16 pin DIP ST package Catalog Listing HFM1300-331 Honeywell reserves the right to make changes in order to improve design and supply the best products possible. HFM1300 Ethernet Receiver BLOCK DIAGRAM CABLE ORDERING INFORMATION HOC 0009 - 150 m Core Dia. 9 µm Length in meters Any length (full meters only) up to 1000 m, terminated with ST Type - connectors is available. Other Fiber Optic cables on request. FIBER--9.SCH CAUTION: The inherent design of this component causes it to be sensitive to electrostatic discharge (ESD). To prevent ESD-induced damage and/or degradation to equipment, take normal ESD precautions when handling this product. RADJ = 10 kΩ TO 40 kΩ IF HIGHER THRESHOLD (SQ)IS NEEDED SQ Transition Delay vs Power Fig. 2 Spectral Responsivity FIBER-73.GRA Fig. 1 FIBER-74.GRA FIBER-12.CIR TYPICAL CIRCUIT CONFIGURATION All Performance Curves Show Typical Values Honeywell reserves the right to make changes in order to improve design and supply the best products possible. 551