SLLSEQ6A September 2016 – September 2016 ONET1131EC
PRODUCTION DATA.
NOTE
Information in the following applications sections is not part of the TI component specification, and TI does not warrant its accuracy or completeness. TI’s customers are responsible for determining suitability of components for their purposes. Customers should validate and test their design implementation to confirm system functionality.
The ONET1131EC is designed to be used in conjunction with a Transmitter Optical Sub-Assembly (TOSA). The ONET1131EC, TOSA, microcontroller and power management circuitry will typically be used in an XFP or SFP+ 10 Gbps optical transceiver. Figure 46 shows the ONET1131EC in differential mode of operation modulating a differentially driven Mach Zehnder (MZ) modulator TOSA and Figure 48 and Figure 49 show the device in single-ended output mode with an Electroabsorptive Modulated Laser (EML) TOSA. Figure 48 has the photodiode cathode available and Figure 49 has the photodiode anode available.
PARAMETER | VALUE |
---|---|
Supply voltage | 2.5 V |
Transmitter input voltage | 100 mVpp to 1000 mVpp differential |
Transmitter output voltage | 1 Vpp to 3.6 Vpp differential |
In the transmitter differential mode of operation, the output driver is intended to be used with a differentially driven Mach Zehnder (MZ) modulator TOSA. On the input side, the DIN+ and DIN- pins are required to be AC coupled to the signal from the host system and the input voltage should be between 100 mVpp and 1000 mVpp differential. On the output side, the OUT+ pin is AC coupled to the modulator positive input and the OUT– pin is AC coupled to the modulator negative input. A bias-T from VCC to both the OUT+ and OUT– pins is required to supply sufficient headroom voltage for the output driver transistors. It is recommended that the inductance in the bias-T have low DC resistance to limit the DC voltage drop and maximize the voltage supplied to the OUT+ and OUT– pins. If the voltage on these pins drops below approximately 2.1 V then the output rise and fall times can be adversely affected.
PARAMETER | VALUE |
---|---|
Supply voltage | 2.5 V |
Transmitter input voltage | 100 mVpp to 1000 mVpp differential |
Transmitter output voltage | 0.5 Vpp to 2 Vpp single-ended |
In the transmitter single-ended mode of operation, the output driver is intended to be used with a single-ended driven Electroabsorptive Modulated Laser (EML) TOSA. On the input side, the DIN+ and DIN– pins are required to be AC coupled to the signal from the host system and the input voltage should be between 100 mVpp and 1000 mVpp differential. On the output side, it is recommended that the OUT+ pin is AC coupled to the modulator input and the OUT– pin can be left unterminated or terminated to VCC through a 50-Ω resistor. A bias-T from VCC to the OUT+ pin is required to supply sufficient headroom voltage for the output driver transistors. It is recommended that the inductance in the bias-T have low DC resistance to limit the DC voltage drop and maximize the voltage supplied to the TXOUT+ pin. If the voltage on this pins drops below approximately 2.1V then the output rise and fall times can be adversely affected.