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DTR2488SM2LCHPIR2 Datasheet(PDF) 4 Page - OPLINK Communications Inc. |
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DTR2488SM2LCHPIR2 Datasheet(HTML) 4 Page - OPLINK Communications Inc. |
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4 / 6 page  4 21737-0266, Rev. D 07-06-2005 DTR-2488-SM2-LC/LS-W-G-CWDM Fig.1 DC-coupled modules Fig.2 AC-coupled modules Receiver Power Monitor option 1 Receiver Power Monitor option 2 Vcc 806Ω 1 DTR-2488 External resistor Recommended external current monitor resistor value is 1k Ω RPM 806 Ω Vcc 1 DTR-2488 R1 R1 R2 AD8551 or equivalent 2N3906 or equivalent R1: 510 R2: 2k recommended Ω Ω + + 1 H coil or ferrite inductor µ 1 H coil or ferrite inductor µ TD+ TD- RD- RD+ 0.1 0.1 10 10 0.1 160 160 160 160 100 Capacitor values in F, Resistor values in µΩ LV-PECL 50 line Ω LV-PECL 12,16 2,3,6 10 9 11 7 8 SIGNAL DETECT 1 Vcc +3.3V chassis ground GND POSTS 15 14 100 RPM (see Power Monitor Options) 50 line Ω 50 line Ω 50 line Ω + 1 H coil or ferrite inductor µ 1 H coil or ferrite inductor µ TD+ TD- RD- RD+ 0.1 10 0.1 160 160 100 Capacitor values in F, Resistor values in µΩ SERDES 12,16 2,3,6 10 9 15 14 11 7 8 SIGNAL DETECT GND POSTS chassis ground depends on SERDES 100 depends on SERDES 0.1 + 10 1 RPM (see Power Monitor Options) 50 line Ω 50 line Ω 50 line Ω 50 line Ω Vcc +3.3V Application Notes DATA interface (DC-coupled modules): The interface circuit for standard DC-coupled modules with direct-coupled LV-PECL interface is shown in Fig. 1. The transmitter input has internal 50 Ω termination. DATA interface (AC-coupled modules): For modules with AC coupling option, both transmitter and receiver interfaces have internal bias, 50 Ω termination andAC coupling capacitors. The transmitter can be connected directly to the driving SERDES as shown in Fig. 2. The receiver can be connected directly to the external 50 Ω loads (termination resistor of the SERDES). For best performance, both DATA+ & DATA- should be used. SIGNAL DETECT: The SIGNAL DETECT circuit monitors the incoming optical signal level and generates a logic LOW signal when an insufficient photocurrent is produced. The output is LV-TTL with no termination required. TX DISABLE: The transmitter is normally enabled (i.e. when the TX DISABLE control input is not connected). When the TX DISABLE control input voltage is higher than VCC - 1.3V, the laser is turned off independent of the input data. Power supply and grounding: The power supply line should be well-filtered. All 0.1 µF power supply bypass capacitors should be as close to the DTR transceiver module as possible. The module case ground is internally AC-coupled to the circuit ground. DTR-2488-SM2 DTR-2488-SM2 |
Similar Part No. - DTR2488SM2LCHPIR2 |
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Similar Description - DTR2488SM2LCHPIR2 |
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