Ascent’s QSFP28 100G SR4 transceivers offers service providers, network operators 100 Gigabit Ethernet connectivity options for data center networking, enterprise core aggregation, and service provider transport applications. It integrates receiver and transmitter path on one module.
• Supports 103.1 Gb/s aggregate bit rate
• 4 x 25Gb/s electrical interface
• Maximum link length of 100 m on OM4 Multimode Fiber (MMF)
• Hot-pluggable QSFP28 footprint
• Single MPO 12 receptacle
• Maximum power dissipation < 3.5W
• RoHS-6 compliant and lead-free
• Support Digital Diagnostic Monitor interface
• Case operating temperature Commercial: 0°C to +70°C
Absolute Maximum Ratings
Parameter | Symbol | Min. | Typ. | Max. | Unit | Note |
Storage Temperature | TS | ‑40 | 85 | °C | ||
Storage Ambient Relative Humidity | HA | 0 | 85 | % | ||
Maximum Supply Voltage | VCC | ‑0.5 | 4.0 | V | ||
Signal Input Voltage | ‑0.3 | Vcc+0.3 | V | |||
Receiver Damage Threshold | +3.4 | dBm | ||||
Lead Soldering Temperature/Time | TSOLD | 260/10 | °C/sec | 1 | ||
Lead Soldering Temperature/Time | TSOLD | 360/10 | °C/sec | 2 |
Notes:
1. Suitable for wave soldering.
2. Only for soldering by iron.
General Product Characteristics
Parameter | Symbol | Min. | Typ. | Max. | Unit | Note |
Bit Rate (All Wavelengths Combined) | BR | 103.1 | Gb/s | 1 | ||
Bit Error Ratio(pre‑FEC) | BER | 10‑5 | 2 | |||
Link distance on OM3 MMF | d | 70 | meters | 3 | ||
Link distance on OM4 MMF | d | 100 | meters | 3 |
Notes:
1. Supports 100GBASE‑SR4 per IEEE 802.3bm.
2. Tested with a PRBS 231‑1 test pattern.
3. Requires FEC on the host to support maximum distance, per 100GBASE‑SR4.
Optical Characteristics
Parameter | Symbol | Min. | Typ. | Max. | Unit | Note |
Transmitter (per Lane) | ||||||
Average Output Power per Lane | POUT | ‑8.4 | 2.4 | dBm | ||
Transmit OMA per Lane | TxOMA | ‑6.4 | 3.0 | dBm | ||
Extinction Ratio | ER | 2 | dB | |||
Center Wavelength | λC | 840 | 860 | nm | ||
RMS Spectral Width | σ | 0.6 | nm | |||
Transmitter OFF Output Power | POff | ‑30 | dBm | |||
Transmitter Eye Mask Definition {X1, X2, X3, Y1, Y2, Y3} | {0.3, 0.38, 0.45, 0.35, 0.41, 0.5} | 1 | ||||
Receiver (per Lane) | ||||||
Input Optical Wavelength | λIN | 840 | 860 | nm | ||
Rx Sensitivity (OMA) per Lane | RSENS | ‑10.3 | dBm | 2 | ||
Input Saturation Power (Overload) | PSAT | +3.4 | dBm | |||
Receiver Reflectance | Rfl | ‑12 | dBm | |||
Loss of Signal Assert | PA | ‑30 | dBm | |||
Loss of Signal De‑Assert | PD | ‑11.3 | dBm | |||
LOS Hysteresis | PD ‑ PA | 0.5 | 6 | dB |
Notes:
1. Hit Ratio 1.5x10‑3 hit/sample.
2. Minimum value is informative only and not the principal indicator of signal strength.
Electrical Interface Characteristics
Parameter | Symbol | Min. | Typ. | Max. | Unit | Note |
Supply Voltage | VCC | 3.15 | 3.45 | V | ||
Supply Current | ICC | 1.5 | A | |||
Module Total Power | P | 3.5 | W | 1 | ||
Transmitter | ||||||
Signaling Rate per Lane | 25.78125±100ppm | Gb/s | ||||
Differential pk‑pk Input Voltage Tolerance | Vin, pp, diff | 900 | mV | |||
Single‑Ended Voltage Tolerance | Vin, pp | ‑0.35 | +3.3 | V | ||
Module Stress Input Test | Per Section 83E.3.4.1, IEEE802.3bm | |||||
Receiver | ||||||
Signaling Rate Per Lane | 25.78125 ppm ± 100ppm | Gb/s | ||||
Differential Data Output Swing | Vout, pp | 100 | 400 | mVpp | 2 | |
300 | 600 | |||||
400 | 600 | 800 | ||||
600 | 1200 | |||||
Eye Width | 0.57 | UI | ||||
Eye Height, Differential | 228 | mV | ||||
Vertical Eye Closure | VEC | 5.5 | dB |
Notes:
1. Maximum total power value is specified across the full 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 4.5W.
2. Output voltage is settable in 4 discrete range via I2C. Default range is Range 2 (400 mV to 800 mV).
Digital Diagnostic Functions
QSFP28‑100G‑SR01 QSFP28 transceivers support the I2C‑based diagnostics interface specified by the QSFP28 MSA.
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