Optical Transceiver
- Optical Transceiver
- IoT Devices
(Battery operation, Low power consumption) - Industrial Sensors
(12V / 24V power supply) - Small Li batteries rechargeable by LDO
(nominal 2V to 3V)
Optical transceivers are commonly used for high speed data communications and they normally conform to industry standard form factors. This results in designers often needing to incorporate multiple power supply rails into a small predetermined physical space.
Efficiency and power dissipation become very important and the latest optical transceiver chipsets demand supplies with low output noise performance and excellent transient response.
Optical Transceiver (QSFP-DD)
QSFP-DD is a module and cage/connector system similar to current QSFP, but with an additional row of contacts providing for an eight lane electrical interface. It provides solutions up to 200 Gbps or 400 Gbps aggregate and uses PAM4 (4-level Pulse Amplitude Modulation) as well as NRZ modulation.
Typically QSFP-DD designs include an additional Digital Signal Processor (DSP) for PAM4 and they also require a negative voltage rail for the PAM4 EML (a laser source plus electro-absorptive modulator)
Block diagram | Requirements | Recommended ICs | Features |
---|---|---|---|
Line Switch For 3.3V input |
Specifications Other points
|
- | - |
Power on Reset To monitor 3.3V rail |
Specifications Other points
|
XC6127 |
High accurate voltage detector
VIN: 0.7V ~ 6.0V |
TOSA (Transmitter Optical SubAssembly) TX CDR (Transmitter Clock Data Recovery) EML Driver (Electro-absorption Modulator Laser Driver) EML (Electro-absorption Modulator Laser) |
Specifications Other points
|
XCL303 |
Inductor built-in Negative Output Voltage DC/DC
VIN: 2.7V ~ 5.5V |
Specifications Other points
|
XCL223 / XCL219 |
Inductor built-in HiSAT-COT step-down DC/DC
VIN: 2.5V ~ 5.5V |
|
TEC (Thermo Electric Cooler) |
Specifications Other points
|
XCL102 |
Inductor built-in step-up DC/DC
VIN: 0.6V ~ 5.5V |
DSP(Digital Signal Processor) PAM4(Pulse Amplitude Modulation) PHY(PHYsical layer) |
Specifications Other points
|
XC9266 |
6A high speed transient response HiSAT-COT step-down DC/DC
VIN: 2.5V ~ 5.5V |
ROSA(Receiver Optical Sub Assembly) |
Specifications Other points
|
XCL102 |
Inductor built-in step-up DC/DC
VIN: 0.6V ~ 5.5V |
Optical Transceiver (QSFP-100G)
QSFP stands for four-lane Quad Small Form-factor Pluggable system. The QSFP28 variant allows speeds up to 100 Gbit/s and the closely related QSFP56 doubles the top speed to 200 Gbit/s.
Simpler QSFP28 designs use non-return-to-zero (NRZ) modulation and normally an additional DSP and extra negative voltage rail is not required . QSFP56 uses PAM4 so an additional negative voltage rail for the PAM4 EML is often required.
Block diagram | Requirements | Recommended ICs | Features |
---|---|---|---|
Line Switch For 3.3V input |
Specifications Other points
|
- | - |
Power on Reset To monitor 3.3V rail |
Specifications Other points
|
XC6127 |
High accurate voltage detector
VIN: 0.7V ~ 6.0V |
TOSA (Transmitter Optical SubAssembly) TX CDR (Transmitter Clock Data Recovery) EML Driver (Electro-absorption Modulator Laser Driver) EML (Electro-absorption Modulator Laser) |
Specifications Other points
|
XCL303 |
Inductor built-in Negative Output Voltage DC/DC
VIN: 2.7V ~ 5.5V |
Specifications Other points
|
XCL223 / XCL219 |
Inductor built-in HiSAT-COT step-down DC/DC
VIN: 2.5V ~ 5.5V |
|
TEC (Thermo Electric Cooler) |
Specifications Other points
|
XCL102 |
Inductor built-in step-up DC/DC
VIN: 0.6V ~ 5.5V |
uPC(microcontroller) |
Specifications Other points
|
XCL223 |
Inductor built-in HiSAT-COT step-down DC/DC
VIN: 2.5V ~ 5.5V |
RX CDR (Receiver Clock Data Recovery) |
Specifications Other points
|
XCL223 / XCL219 |
Inductor built-in HiSAT-COT step-down DC/DC
VIN: 2.5V ~ 5.5V |
ROSA (Receiver Optical Subassembly) |
Specifications Other points
|
XCL102 |
Inductor built-in step-up DC/DC
VIN: 0.6V ~ 5.5V |
- Optical Transceiver AOC(Active Optical Cable)
- IoT Devices (Battery operation, Low power consumption )
- Industrial Sensors (12V / 24V power supply)
- Small Li batteries rechargeable by LDO (nominal 2V to 3V)