Optoway
LT-94C73C-PWG
LT-94C73C-PWG
1
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(RoHS Compliant)
3.3V / 2.488 Gbps 1490 nm Continuous-Mode TX / 1.244 Gbps 1310 nm Burst-Mode RX with Burst-Mode Signal Detect, ITU-T G.984.2 G-PON CLASS C 2X6 SFF OLT Transceiver (with Reset-Less RX)
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l Class C Optical Line Terminal (OLT) for ITU-T G.984.2 Gigabit-capable PON l 2 .488 Gbps / 1490 nm Continuous-Mode Transmitter l 1 .244 Gbps / 1310 nm Burst-Mode Receiver with 2R Output l R esetless BM Receiver Design l BM RX with 32 Bits Packet-to-packet Guard Time for over 15dB Packet Optical Power Difference l 0 to 70oC Operating l 2 x6 SFF Package with SC/PC Pigtail l Single +3.3 V Power Supply l RoHS Compliant l Transmitter: AC Coupling Input l Receiver: DC Coupling Output l LVTTL TX Shutdown Input l LVTTL TX Laser Failure Alarm Output l LVTTL High-Speed Burst-mode RX Signal Detect l Analog RX Received Power Monitor l Wave Solderable and Aqueous Washable l Class 1 Laser International Safety Standard IEC-60825 Compliant
FEATURES
APPLICATIONS DESCRIPTION
l Broadband G-PON System LT-94C73C series is ITU-T G.984.2 Class C optical line terminal (OLT) for 2.488 Gbps/1490 nm in downstream and 1.244 Gbps/1310 nm in upstream. The transmitter section uses a multiple quantum well 1490 nm DFB laser and is a class 1 laser compliant according to International Safety Standard IEC-60825. The receiver section uses an integrated 1310 nm burst-mode detector preamplifier (IDP) mounted in an optical header and a burst-mode limiting post-amplifier IC. Unlike the conventional BM RX, the RX does not requires reset pulse to receive optical data packets with different optical power. LVPECL interface is used for differential inputs and outputs. A LVTTL logic interface simplifies interface to external circuitry.
LASER SAFETY
This single mode transceiver is a Class 1 laser product. It complies with IEC-60825 and FDA 21 CFR 1040.10 and 1040.11. The transceiver must be operated within the specified temperature and voltage limits. The optical ports of the module shall be terminated with an optical connector or with a dust plug.
RX Temp (oC) SFF 2X6 SFF 2X6 SFF 2X6 (dBm) 1310 1310 -8 / -29 0 / 70 -8 / -28 0 / 70 -8 / -28 -20 / 85 Yes Yes Yes Package RoHS Compliant
ORDER INFORMATION
P /No Class T ype LT-94C73C-PWG LT-94B73B-PWG C B+ CNT CNT Speed (Gb/s) 2.488 2.488 1490 DFB 1490 DFB TX λ (nm)
Power Type (dBm)
Speed λ (nm) S ens. (Gb/s)
7 / 3 BM, 2R 1.244 1.5 / 5 BM, 2R 1.244
LT-94B73B-PW-AG B+ CNT 2.488 1490 DFB 1.5 / 5 BM, 2R 1.244 1310 NOTE: 1. LT-XXXXXX-PWXG, SC/PC pigtail with fiber length 50 cm. 2. BM: Burst Mode; CNT: Continuous Mode; SFF: Small Form Factor Package.
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OPTOWAY TECHNOLOGY INC. No.38, Kuang Fu S. Road, Hu Kou, Hsin Chu Industrial Park, Hsin Chu, Taiwan 303
Tel: 886-3-5979798 Fax: 886-3-5979737 E-mail: sales@optoway.com.tw http: // www.optoway.com.tw
5/1/2006 V1.0
Optoway
Absolute Maximum Ratings
Parameter Storage Temperature Operating Case Temperature Power Supply Voltage Symbol Tstg Topr Vcc Min -40 0 -0.5 Max 85 70 3.6 Units o C o C V
LT-94C73C-PWG
Notes Air flow 1m/sec @>60 oC
2
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Recommended Operating Conditions
Parameter Power Supply Voltage Operating Case Temperature Power Supply Current Symbol Vcc Topr ICC (TX+RX) Min 3.13 0 Max. 3.47 70 350 Unit V o C mA Units / Notes V Air flow 1m/sec @>60 oC
Transmitter Specifications ( 0oC < Topr < 70oC, 3.13V < Vcc < 3.47V )
Parameter Symbol Min. Typ. Max. 7 1500 1 Units dBm nm nm dB dB Gb/s ps ps dB/Hz dB µA µA mV V V V V µs Notes 1 -20 dB Width Optical Optical Transmit Power Po 3 Output Center Wavelength 1480 λ Δλ Output Spectrum Width SMSR Side Mode Suppression Ratio 30 Extinction Ratio ER 10 Data Rate Optical Rise Time Optical Fall Time Relative Intensity Noise RIN Downstream Optical Penalty Electrical Data Input Current – Low -350 Data Input Current – High Differential Input Voltage VIH - VIL 400 Shutdown Input Voltage -- Low VTSHDN,L 0 Shutdown Input Voltage -- High VTSHDN,H 2.0 TX Laser Alarm Voltage -- Low V TLF,L 0 TX Laser Alarm Voltage -- High V TLF,H 2.0 Shut Off Time for Tx Shutdown tDIS 1. Output power is power coupled into a 9/125 µm single mode fiber.
2.488 150 150 -120 0.5
20% to 80% Values 20% to 80% Values
350 2400 0.8 Vcc 0.5 Vcc 30
Peak-to-Peak TX Output Disable TX Output Enable TX laser normal TX laser fail
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OPTOWAY TECHNOLOGY INC. No.38, Kuang Fu S. Road, Hu Kou, Hsin Chu Industrial Park, Hsin Chu, Taiwan 303
Tel: 886-3-5979798 Fax: 886-3-5979737 E-mail: sales@optoway.com.tw http: // www.optoway.com.tw
5/1/2006 V1.0
Optoway
Receiver Characteristics ( 0oC < Topr < 70oC, 3.13V < Vcc < 3.47V )
Parameter Optical Sensitivity Saturation Optical Power Wavelength of Operation Data Rate Packet-to-Packet Guard Time DC Optical Tolerance Optical Return Loss Signal Detect -- Asserted Signal Detect -- Deasserted Signal detect -- Hysteresis Electrical Data Output Voltage – Low Data Output Voltage – H igh Consecutive Identical Digit Immunity Signal Detect Output Voltage -- Low Signal Detect Output Voltage -- High Signal Detect Assert Time Signal Detect Deassert Time Received Power Monitoring Voltage Rest Between Packet Symbol Sen Sat Min. Typ. Max. -29 -8 1260 1.244 32 Sen +3 20 Pa Pd -28 -40 2 Vcc - 1.935 Vcc -1.135 72 2.0 10 80 V cc - 1.56 V cc - 0.76 0.5 15 100 30 150 Resetless 1360 Units dBm dBm nm Gb/s Bits dB dB dBm dBm dB V V Bits V V ns ns V
LT-94C73C-PWG
Notes 2 2 3 4,5
3
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Transition: low to high Transition: high to low
VOL VOH VOL VOH ASMAX ANSMAX VRPM
Transition: low to high Transition: high to low Refer Figure 3.
2. Sensitivity and saturation levels at BER 1E-10 for a 223-1 @ER=10. 3. At least 30 dB optical isolation for the wavelength 1480 to 1500 nm. 4. No reset is needed. 5. The optical power difference between neighboring packets is up to 15 dB.
CONNECTION DIAGRAM
PIN
A 1 2 3
Signal Name
RPM RX Ground RX Vcc RX SD
Description
Receiver Power Monitor. Receiver Ground. Connect this pin to ground plane. RX power supply input. Connect to 3.3 V power supply Signal Detect. High when single is present (LVTTL) Negative RX output, Differential LVPECL. DC coupled. Positive RX output, Differential LVPECL. DC Coupled. Mounting Studs. Connect to Chassis Ground
PIN
B 10 9 8
Signal Name
LF TDTD+ TxDis
Description
Laser failure warning out. This pin is high when LD fails. Negative transmitter data In. Internally terminated for LVPECL. AC coupled. Positive transmitter data In. Internally terminated for LVPECL. AC coupled. Transmitter Disable. TX is disabled when this pin is low. Internally pulled to “High”.. Transmitter Ground. Directly connect this plan to ground plane TX power supply input. Connect to 3 .3 V power supply
4 5 MS
RX OUT (-) RX OUT (+) MS
7 6
TX Ground TX Vcc
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OPTOWAY TECHNOLOGY INC. No.38, Kuang Fu S. Road, Hu Kou, Hsin Chu Industrial Park, Hsin Chu, Taiwan 303
Tel: 886-3-5979798 Fax: 886-3-5979737 E-mail: sales@optoway.com.tw http: // www.optoway.com.tw
5/1/2006 V1.0
Optoway
PACKET-TO-PACKET SPACING
LT-94C73C-PWG
4
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1 .244 Gbps, BER < 10 -10 tg=25 ns
BM Receiver Output
-13 dBm
-28 dBm
Hi-Lo Optical Input
Figure 1. High-Low packet test at Hi/Lo ratio=15 dB
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OPTOWAY TECHNOLOGY INC. No.38, Kuang Fu S. Road, Hu Kou, Hsin Chu Industrial Park, Hsin Chu, Taiwan 303
Tel: 886-3-5979798 Fax: 886-3-5979737 E-mail: sales@optoway.com.tw http: // www.optoway.com.tw
5/1/2006 V1.0
Optoway
TIME CHARACTERISTICS OF SIGNAL DETECT
LT-94C73C-PWG
5
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RX Output
Signal Detect
Figure 2. Timing characteristics of Signal Detect. Signal Detect: Low to High ~20 ns, High to Low ~100 ns (> 100 bit “0 ”)
INCOMING OPTICAL POWER V.S. THE MONITORING ANALOG VOLTAGE
Received Power Monitor Voltage VRPM (mV)
1200 1000 800 600 400 200 0 -35 -30 -25 -20 -15 -10 -5 0 Average Optical Input Power (dBm)
Figure 3. Relation between Power Monitor Output (PIN “A”) and Average Incoming Optical Power
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OPTOWAY TECHNOLOGY INC. No.38, Kuang Fu S. Road, Hu Kou, Hsin Chu Industrial Park, Hsin Chu, Taiwan 303
Tel: 886-3-5979798 Fax: 886-3-5979737 E-mail: sales@optoway.com.tw http: // www.optoway.com.tw
5/1/2006 V1.0
Optoway
RECOMMENDED CIRCUIT SCHEMATIC
TX FAULT TX GND 7 8 B LD Driver 100R TXTX Vcc 10 6 1uH 10nF 10uF 1uH Z=50R Vcc 3.3V TX+ 9 Z=50R LVPECL TX Disable Vcc3.3V
LT-94C73C-PWG
6
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RX Vcc
2 10nF 10uF Vcc 3.3V Vcc 3.3V 130R 130R TDLVPECL TD+ 82R 82R
RXPost Amp
4 Z=50R
RX+
5 Z=50R 3 1 CDR or PHY DEVICE A Receiver Power Monitor
SD RX GND RPM SFF OLT Module
Signal Detect
PACKAGE DIAGRAM
Units in mm
Note: Specifications subject to change without notice. The 50 +/- 3 cm long pigtail with a SC/PC connector is standard. If non-standard pigtail is required, please make a contact with Optoway Technology Inc.
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OPTOWAY TECHNOLOGY INC. No.38, Kuang Fu S. Road, Hu Kou, Hsin Chu Industrial Park, Hsin Chu, Taiwan 303
Tel: 886-3-5979798 Fax: 886-3-5979737 E-mail: sales@optoway.com.tw http: // www.optoway.com.tw
5/1/2006 V1.0
Optoway
RECOMMENDED CIRCUIT BOARD LAYOUT
LT-94C73C-PWG
7
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Notes: 1. This figure describes the recommended circuit board layout for the SFF OLT Transceiver. 2. The hatched areas are keep-out areas reserved for housing standoff. No metal traces or ground connection in keep-out area. 3. The mounting studs should be solder to chassis ground for mechanical integrity.
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OPTOWAY TECHNOLOGY INC. No.38, Kuang Fu S. Road, Hu Kou, Hsin Chu Industrial Park, Hsin Chu, Taiwan 303
Tel: 886-3-5979798 Fax: 886-3-5979737 E-mail: sales@optoway.com.tw http: // www.optoway.com.tw
5/1/2006 V1.0
