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QSFP28 transceiver 100Gb/s QSFP28 SR4 Transceiver with DDM

 

QSFP28 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 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 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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