DELTA ELECTRONICS, INC. LC-2488B4H2 Single Mode Laser Small Form Factor Transceiver for SONET OC-48 / SDH STM-16 FEATURES • Compliant with SFF Transceiver MSA Specification • Compliant with Specifications for SONET OC-48/SDH STM-16 • RJ-45 style LCTM connector system • 1310 nm Fabry-Perot Laser Source Technology • Data Link up to 2km in 9/125 Signal Mode Fiber • Single + 3.3V Power Supply and TTL Logic Interface • 2x5 LC SFF small footprint utilized in high density application • Laser Class 1 Product which comply with the requirements of IEC 60825-1 and IEC 60825-2 ORDERING INFORMATION LC - 2488 B 4 H 2 X DATA RATE WAVE LENGTH A 850 nm B 1310 nm C 1550 nm SD LEVEL 4 TTL TEMPERATURE BLANK 0~70 deg C H -10~85 deg C T -40~85 deg C COUPLING TYPE 1 DC / DC 2 AC / AC LINK DISTANCE H 2km in 9/125 um SMF I 5km in 9/125 um SMF Q 10km in 9/125 um SMF E 200m in 62.5/125 um MMF, 500m in 50/125 um MMF F 300m in 62.5/125 um MMF, 550m in 50/125 um MMF Product Description The LC-2488B4H2 from DELTA ELECTRONIC is a hot pluggable 3.3V Small Form-Factor transceiver module designed expressly for high-speed bi-directional communication applications that require rates of up to 2.488 Gbit/sec. It is compliant with the SONET OC-48 / SDH STM-16 standards, as well as the SFF Multisource Agreement. The LC-2488B4H2 transceivers provide with the LC receptacle that is compatible with the industry standard LC connector. The transceiver is supplied in the industry standard 2x5 DIP style and is footprint compatible with SFF Multi Source Agreement(MSA). The transmitter section of LC-2488B4H2 consists of an 1310 nm Fabry-Perot (FP) Laser in an optical subassembly (OSA) while the receiver consists of a GaAs PIN photo diode mounted together with a transimpedance preamplifier. The post-amplifier of the LC-2488B4H2 also includes a Signal Detect circuit which provides a TTL logic-high output when an unusable optical signal level is detected. The LC-2488B4H2 transceiver is a Class 1 eye safety product.The optical power levels, under normal operation, are at eye safe level. LC-2488B4H2 Single Mode Laser Small Form Factor Transceiver for SONET OC-48 / SDH STM-16 DELTA ELECTRONICS, INC. Absolute Maximum Ratings Parameter Symbol Min. Vcc Ts TSOLD tSOLD -0..5 -40 Supply voltage Storage temperature Lead soldering temperature Lead soldering time Typ. Max. Unit 5 85 240 10 V ℃ ℃ sec. Max. Unit Note Recommended Operating Conditions Parameter Ambient Operating Temperature Supply voltage Transmitter Differential Input Voltage Data Output Load Symbol Min. Typ. TA 0 70 ℃ Vcc 3.15 3.45 V VD 0.4 1.6 V RDL E l e c t r i c a l C h a r a c t e r i s t i c s (T A = 0 d e g C t o 7 0 d e g C , V Parameter Symbol Ω 50 Min. Typ. C C= 3 . 1 5 V to 3.45V ) Max. Unit Icc 160 mA Icc 13 0 mA 1 .2 V Note TRANSMITTER Supply current RECEIVER Supply current Data output differential voltage VD 0.5 0.7 Output Data risetime tr 150 ps Ref 1 Output Data falltime tf 150 ps Ref 1 S i g n a l D e t e c t O u t p u t -H i g h V LH 2 3.45 S i g n a l D e t e c t O u t p u t -L o w V LL 0 0.8 Notes: Ref 1. These are 20%~80% values Note DELTA ELECTRONICS, INC. LC-2488B4H2 Single Mode Laser Small Form Factor Transceiver for SONET OC-48 / SDH STM-16 Optical Characteristics (T A=0 degC to 70 degC , VCC =3.15V to 3.45V ) Parameter Symbol Min. Typ. Max. Unit Note PO -10 -6 -3 dBm Ref 1 TRANSMITTER Launched power(avg.) Optical extinction ratio 8.2 dB Center wavelength λc 1355 nm Spectral width(RMS) σ 4 nm (rms) Optical risetime tr 100 ps Ref 2 Optical falltime tf 225 ps Ref 2 Optical input sensitivity(avg.) PIN -18 dBm Ref 3 Optical input saturation(avg.) PSAT dBm Ref 4 1270 1310 RECEIVER -3 Optical wavelength λ Signal detect- Assert PA Signal detect- Deassert PD -30 PA -PD 0.5 Signal detect- Hysteresis 1310 nm -18 dBm dBm 4 dB Notes: Ref 1. The maximum optical output power complies with class 1 laser eye safety. Ref 2. These are unfiltered 20-80% values. Ref 3. The receive sensitivity is measured using a worst case extinction ratio penalty BER better than or equal to 1x10-12 in the center of the eye opening with 223 -1 NRZ PRBS Ref 4. Measured with 2 23 -1 NRZ PRBS DELTA ELECTRONICS, INC. LC-2488B4H2 Single Mode Laser Small Form Factor Transceiver for SONET OC-48 / SDH STM-16 Connection Diagram Rx Tx Mounting Studs / Soder Posts Mounting Studs / Soder Posts Top View Receiver Ground 1 10 Transmitter Input Data Bar Receiver Power Supply 2 9 Transmitter Input Data Signal Detect 3 8 Transmitter Disable Receiver Output Data Bar 4 7 Transmitter Gound Receiver Output Data 5 6 Transmitter Power Supply Pin Descriptions Pin Name Pin# Receiver Ground 1 Receiver Power Supply 2 Signal Detect 3 Receiver Output Data Bar 4 Receiver Output Data 5 Transmitter Power Spply 6 Transmitter Gound 7 Transmitter Disable 8 Transmitter Input Data 9 Transmitter Input Data Bar 10 Description Directly connect this pin to the receiver ground plane Provide +3.3V dc via the recommended receiver power supply filter circuit. Receiver Signal Detect TTL output. Active high on this line indicates a received optical signal Receiver data inverted differential AC coupled PECL compatible output Receiver data non-inverted differential AC coupled PECL compatible output Provide +3.3V dc via the recommended transmitter power supply filter circuit. Directly connect this pin to the transmitter ground plane Connect this pin to +3.3V TTL logic high ‘1’ to disable module. To enable module, connect this pin to TTL logic low ‘0’. Transmitter data inverted differential AC coupled PECL compatible input Transmitter data non-inverted differential AC coupled PECL compatible input LC-2488B4H2 Single Mode Laser Small Form Factor Transceiver for SONET OC-48 / SDH STM-16 DELTA ELECTRONICS, INC. Recommended Circuit Schematic : TXDIS 8 TXGND 7 TxD 9 TTL Logic Level VCC SerDes 3.3V VCC Transmitter Laser VCCTx 6 Delta Transceiver C1 VCCRx 2 SD 3 RxD 5 RxD 4 RxGND 1 Receiver Serializer/ Deserializer C3 C2 L1 SD to upper level Transceiver Chip RDRD+ Receiver PLL etc. R12 Post Amp DRIVER R11 PreAmp TX- VCC 3.3V L2 R9 Signal detect ECL/ PECL 10 R6 TxD R5 Driver TX+ R10 100R Input Level (LV-TTL) TX Function Low ON High OFF NIC ON Table 1 (Disable Pin Truth Table) C1/2/3 L1/2 = 4.7 uF = 1 uH Value of R5/6/9/10/11/12 may vary as long as proper 50 Ω termination or 100 Ω differential Is Provided.For good EMI performance ,the power supply filter is required.Use short tracks from the inductor L1/2 to the module VccTx/VccRx. DELTA ELECTRONICS, INC. LC-2488B4H2 Single Mode Laser Small Form Factor Transceiver for SONET OC-48 / SDH STM-16 SFF Transceiver Package Dimensions LC-2488B4H2 Single Mode Laser Small Form Factor Transceiver for SONET OC-48 / SDH STM-16 DELTA ELECTRONICS, INC. Regulatory Compliance Test Item Reference (#1) FCC Class B Electromagnetic Interference EMI EN 55022 Class B Qty’ Evaluation 5 CISPR 22 (#2) Immunity ： Radio Frequency Electromagnetic Field (#3) Immunity： Electrostatic Discharge to the Duplex LC Receptacle EN 61000-4-3 5 IEC 1000-4-3 EN 61000-4-2 IEC 1000-4-2 5 IEC 801.2 (1) Satisfied with electrical characteristics of product spec. (#4) Electrostatic Discharge to the Electrical Pins (2) No physical damage MIL -STD-883C Method 3015.4 EIAJ#1988.3.2B Version 2, Machine model 5