100GBASE-SR4 QSFP28 Optical Transceiver Module
Applications
l IEEE 802.3bm 100GBASE SR4 and 40GBASE SR4128G Fiber Channel
l Infiniband FDR/EDR
Features
l Hot-pluggable QSFP28 form factor
l Supports 103.1Gb/s aggregate bit rates
l Power dissipation < 3.5W
l Commercial case temperature range of 0°C to 70°C
l Single 3.3V power supply
l Maximum link length of 100m on OM4 Multimode Fiber (MMF)
l 4x25Gb/s 850mm VCSEL-based transmitter
l 4x25G electrical interface
l Single MPO12 receptacle
l I2C management interface
Ordering Information
TLP850M28GQ:
QSFP28 Optical Transceiver.
Pin Descriptions
Pin | Symbol | Name/Description | Notes |
1 | GND | Ground | 1 |
2 | Tx2n | Transmitter Inverted Data Input | |
3 | Tx2p | Transmitter Non-Inverted Data Input | |
4 | GND | Ground | 1 |
5 | Tx4n | Transmitter Inverted Data Input | |
6 | Tx4p | Transmitter Non-Inverted Data Input | |
7 | GND | Ground | 1 |
8 | ModSelL | Module Select | |
9 | ResetL | Module Reset | |
10 | Vcc Rx | +3.3V Power Supply Receiver | 2 |
11 | SCL | 2-wire serial interface clock | |
12 | SDA | 2-wire serial interface data | |
13 | GND | Ground | 1 |
14 | Rx3p | Receiver Non-Inverted Data Output | |
15 | Rx3n | Receiver Inverted Data Output | |
16 | GND | Ground | 1 |
17 | Rx1p | Receiver Non-Inverted Data Output | |
18 | Rx1n | Receiver Inverted Data Output | |
19 | GND | Ground | 1 |
20 | GND | Ground | 1 |
21 | Rx2n | Receiver Inverted Data Output | |
22 | Rx2p | Receiver Non-Inverted Data Output | |
23 | GND | Ground | 1 |
24 | Rx4n | Receiver Inverted Data Output | |
25 | Rx4p | Receiver Non-Inverted Data Output | |
26 | GND | Ground | 1 |
27 | ModPrsL | Module Present | |
28 | IntL | Interrupt | |
29 | Vcc Tx | +3.3V Power supply transmitter | 2 |
30 | Vcc1 | +3.3V Power supply | 2 |
31 | LPMode | Low Power Mode | |
32 | GND | Ground | 1 |
33 | Tx3p | Transmitter Non-Inverted Data Input | |
34 | Tx3n | Transmitter Inverted Data Input | |
35 | GND | Ground | 1 |
36 | Tx1p | Transmitter Non-Inverted Data Input | |
37 | Tx1n | Transmitter Inverted Data Input | |
38 | GND | Ground | 1 |
Notes
1. Circuit ground is internally isolated from chassis ground.
Absolute Maximum Ratings
Module performance is not guaranteed beyond the operating range.
Exceeding the limits below may damage the transceiver module permanently.
Form Parameter | Symbol | Min | Typ | Max | Unit | Ref. |
Maximum Supply Voltage | Vcc | -0.3 | 3.6 | V | ||
Storage Temperature | TS | -20 | 85 | |||
Case Operating Temperature | TOP | 0 | 70 | °C | ||
Relative Humidity | RH | 1.5 | 85 | % | 1 | |
Receiver Damage Threshold, per Lane | PRdmg | 5.5 | dBm |
Notes:
1. Non-condensing.
Recommended Operating Conditions
Form Parameter | Symbol | Min | Typ | Max | Unit | Ref. |
Supply Voltage | Vcc | 3.13 | 3.3 | 3.47 | V | |
Operating Case temperature | Tca | 0 | 70 | °C | ||
Data Rate Per Lane | fd | 25.78125 | Gbps | |||
Humidity | Rh | 5 | 85 | % | ||
Fiber Bend Radius | Rb | 3 | cm |
Electrical Characteristics(EOL, TOP = 0 to 70°C, VCC = 3.135 to 3.465 Volts)
Parameter | Symbol | Min | Typ | Max | Unit | Ref. |
Supply Voltage | Vcc | 3.135 | 3.465 | V | ||
Supply Current | Icc | 1.5 | A | |||
Module total power | P | 3.5 | W | 1 | ||
Transmitter | ||||||
Signaling rate per lane | 25.78 | Gb/s | 2 | |||
Differential data input voltage per lane | Vin,pp,diff | 900 | mV | |||
Single-ended voltage tolerance | Vin,pp | -0.35 | +3.3 | V | ||
Receiver | ||||||
Signaling rate per lane | 25.78 | Gb/s | 2 | |||
Differential data output swing | Vout,pp | 400 | 600 | 800 | mVpp | |
Transition time (20% to 80%) | Tr, Tf | 12 | ps | |||
Bit Error Rate | BER | E-12 | 3 | |||
Notes:
1. Maximum total power value is specified across the full operational temperature and voltage range when CDRs are locked or a lack of input signal results in squelch being activated. If incorrect frequencies cause the CDRs to continuously attempt to lock, maximum power dissipation may reach 4.5 W.
2. ± 100ppm
3. BER=10-12; PRBS 231-1@25.78125Gbps.
Optical Characteristics(EOL, TOP = 0 to 70°C, VCC = 3.135 to 3.465 Volts)
Optical characteristics are dependent on data rate and protocol. Ethernet 100GBASE-SR4, OTU4, and 128G Fibre Channel optical characteristics are as follows:
100GBASE-SR4 Ethernet Operation
Parameter | Symbol | Min | Typ | Max | Unit | Ref. |
Transmitter | ||||||
Signaling Speed per Lane | 25.78125 ± 100ppm | Gb/s | 1 | |||
Center wavelength | 840 | 860 | nm | |||
RMS Spectral Width | SW | 0.6 | nm | |||
Average Launch Power per Lane | TXPx | -8.4 | 2.4 | dBm | ||
Transmit OMA per Lane | TxOMA | -6.4 | 3 | dBm | ||
Launch Power [OMA] minus TDEC per Lane | P-TDEC | -7.3 | dBm | |||
TDEC per Lane | TDEC | 4.3 | dBm | |||
Optical Extinction Ratio | ER | 2 | dB | |||
Receiver | ||||||
Signaling Speed per Lane | 25.78125 ± 100ppm | GBd | 2 | |||
Center wavelength | 840 | 860 | nm | |||
Average Receive Power per Lane | RXPx | -10.3 | 2.4 | dBm | 3 | |
Receiver Reflectance | Rfl | -12 | dB | |||
Stressed Receiver Sensitivity (OMA) per Lane | SRS | -5.2 | dBm | |||
Stressed Conditions: | ||||||
LOS De-Assert | LOSD | -12 | dBm | |||
LOS Assert | LOSA | -30 | dBm | |||
LOS Hysteresis | 0.5 | 2 | dB | |||
Notes:
1. Transmitter consists of 4 lasers operating at a maximum speed of 25.78125Gb/s ±100ppm each.
2. Receiver consists of 4 photodetectors operating at a maximum speed of 25.78125Gb/s ±100ppm each.
3. Minimum value is informative only and not the principal indicator of signal strength.
General Specifications
Form Parameter | Symbol | Min | Typ | Max | Unit | Ref. |
Bit Rate (all wavelengths combined) | BR | 112.2 | Gb/s | 1 | ||
Bit Error Ratio @25.78Gb/s | BER1 | 5x10-5 | 2 | |||
Maximum Supported Distances | ||||||
Fiber Type | ||||||
OM3 MMF | Lmax1 | 70 | m | 3 | ||
OM4 MMF | Lmax2 | 100 | m | 3 | ||
Notes:
1. Supports 100GBASE-SR4 per IEEE 802.3bm.
2. Tested with a 231 – 1 PRBS.
3. Requires FEC on the host to support maximum distance.
Mechanical Design Diagram (mm)
QSFP28 transceivers are compatible with the QSFP28 MSA specification.
Optical Interface
