QSFP28 sm transceiver SR4 transceiver 100G transceiver

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QSFP28 sm transceiver   SR4 transceiver 100Gb/s QSFP28 SR4 Transceiver with DDM

QSFP28 sm transceiver

QSFP28 sm transceiver

QSFP28 sm transceiver  FEATURES

  • Up to 27.952 Gbps Data rate per channel
  • Maximum link length of 100m links on OM3 multimode fiber
  • High Reliability 850nm VCSEL technology
  • Electrically hot-pluggable
  • Digital diagnostic SFF-8436 compliant
  • Compliant with QSFP28 MSA
  • Case operating temperature range:0°C to 70°C
  • Power dissipation < 2.5 W

APPLICATIONS

  • Data center
  • Infiniband QDR
  • Fiber channel

STANDARD

  • Compliant to IEEE 802.3 bm
  • Compliant to SFF-8436
  • RoHS Compliant.

 General Description

QSFP28 sm transceiver is designed for use in 100 Gigabit per second links over multimode fiber. They are compliant with the QSFP28 MSA and IEEE 802.3bm

QSFP28 SR4 transceiver portion of the transceiver incorporates a 4-channel VCSEL (Vertical Cavity Surface Emitting Laser) array, a 4-channel input buffer and laser driver, diagnostic monitors, control and bias blocks. For module control, the control interface incorporates a Two Wire Serial interface of clock and data signals. Diagnostic monitors for VCSEL bias, module temperature,received optical power and supply voltage are implemented and results are available through the TWS interface. Alarm and warning thresholds are established for the monitored attributes. Flags are set and interrupts generated when the attributes are outside the thresholds. Flags are also set and interrupts generated for loss of input signal (LOS) and transmitter fault conditions. All flags are latched and will remain set even if the condition initiating the latch clears and operation resumes. All interrupts can be masked and flags are reset by reading the appropriate flag register. The optical output will squelch for loss of input signal unless squelch is disabled. Fault detection or channel deactivation through the TWS interface will disable the channel. Status, alarm/warning and fault information are available via the TWS interface.

SFP28 transceiver optical receiver portion of the transceiver incorporates a 4-channel PIN photodiode array, a 4-channel TIA array, a 4 channel output buffer, diagnostic monitors, and control and bias blocks. Diagnostic monitors for optical input power are implemented and results are available through the TWS interface. Alarm and warning thresholds are established for the monitored attributes. Flags are set and interrupts generated when the attributes are outside the thresholds. Flags are also set and interrupts generated for loss of optical input signal (LOS). All flags are latched and will remain set even if the condition initiating the flag clears and operation resumes. All interrupts can be masked and flags are reset upon reading the appropriate flag register. The electrical output will squelch for loss of input signal (unless squelch is disabled) and channel de-activation through TWS interface. Status and alarm/warning information are available via the TWS interface.

Ⅰ Absolute Maximum Ratings

 Parameter Symbol Min. Typ. Max. Unit Note
 Storage Temperature Ts -40 – 85 ºC
 Storage Ambient Humidity HA 5 – 95 %
 Operating Relative Humidity RH – – 85 %
 Power Supply Voltage VCC -0.3 – 4 V
 Signal Input Voltage Vcc-0.3 – Vcc+0.3 V
 Damage threshold 3.4 dBm

Ⅱ Recommended Operating Conditions

 Parameter Symbol Min. Typ. Max. Unit Note
 Case Operating Temperature Tcase 0 – 70 ºC Without air flow
 Power Supply Voltage VCC 3.14 3.3 3.47 V
 Power Supply Current ICC – 350 mA
 Data Rate BR 10.3125 Gbps Each channel
 Transmission Distance TD – 100 m OM3 MMF
 150 m OM4 MMF

 

Ⅲ Optical Characteristics

 Parameter Symbol Min Typ Max Unit NOTE
 Transmitter
 Center Wavelength λ0 840 860 nm
 Average Launch Power each lane -7.6 -1 dBm
 Spectral Width (RMS) σ 0.65 nm
 Optical Extinction Ratio ER 3 dB
 Average launch Power off each lane Poff -30 dBm
 Transmitter and Dispersion Penalty each lane TDP 3.5 dB
 Optical Return Loss Tolerance ORL 12 dB
 Output Eye Mask Compliant with IEEE 802.3ba
 Receiver
 Receiver Wavelength Λin 840 860 nm
 Rx Sensitivity per lane RSENS -9.5 dBm 1
 Input Saturation Power (Overload) Psat 2.4 dBm
 Receiver Reflectance Rr -12 dB
 LOS De-Assert LOSD -12 dBm
 LOS Assert LOSA -30 dBm
 LOS Hysteresis 0.5 dBm

Notes:
1. Measured with a PRBS 231-1 test pattern, @10.325Gb/s, BER<10-12 .

 

IV. Electrical Characteristics

 Parameter Symbol Min Typ Max Unit NOTE
 Supply Voltage Vcc 3.14 3.3 3.46 V
 Supply Current Icc 350 mA
 Transmitter
 Input differential impedance Rin 100 Ω 1
  Differential data input swing Vin,pp 180 1000 mV
 Single ended input voltage tolerance VinT -0.3 4.0 V
 Receiver
 Differential data output swing Vout,pp 300 850 mV 2
 Single-ended output voltage -0.3 4.0 V

 

 

 

 

 

 

 

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