QSFP+ Pluggable Short-Range Transceiver Module (SR4)
40 Gb/s Pluggable Optical Transceiver
The QSFP-40G-SR4 is a 4-channel pluggable optical transceiver module for short-range data communication and interconnects applications. The module contains four channels in each direction with 40 Gb/s aggregate bandwidth with each channel operating at up to 10 Gb/s at distances of up to 100 meters (328 ft.) using OM3 fiber and 150 meters on OM4 multimode fibers. The electrical interface uses a 38-contact edge type connector, compliant with SFF-8436. The optical interface uses a 12-fiber MPO connector.
SPECIFICATIONS
QSFP-40G-SR4 Quick Specifications
Part Number: QSFP-40G-SR4
Form Factor: QSFP+
TX Optical Wavelength: 850 nm
Distance*1: 100m/328 ft. (OM3), 150m/492 ft.*2 (OM4)
Cable Type: MMF
Rate Category: 40GBase
Interface Type: SR4
Digital Optical Mon. (DOM): Yes
Connector Type: MPO/MTP
Power Consumption: 1.5W
*1 Minimum cabling distance is 0.5 meters (1.64 feet) for -SR4 according to the IEEE 802.3 standard.
*2 Considered an engineered link with maximum 1 decibel loss budget
For specifications parameters definition, please refer to IEEE Std 802.3-2012, IEEE Standard for Ethernet, SECTION SIX, Clause 86 and Annex 86A.
Absolute Maximum Ratings
| Parameters | Symbols | Min | Max | Unit | Remarks |
| Storage temperature | Ts | -20 | +85 | deg.C | |
| Storage relative humidity | RH | 85 | |||
| Supply voltage | Vcc | -0.3 | +3.6 | V | |
| ESD (HBM) | VESD | -1000 | +1000 | V | High speed interfaces |
| -2000 | +2000 | V | Others | ||
| Transmitter single end input voltage | Vin p-p | 1400 | mVp-p |
Recommended Operating Conditions
| Parameters | Symbols | Min | Typ. | Max | Unit |
| Operating case temperature | Tc | 0 | +70 | deg.C | |
| Supply voltage | Vcc | 3.13 | 3.3 | 3.47 | V |
| Supply current | Icc | 350 | 450 | mA | |
| Power supply noise tolerance | 100 | mVp-p | |||
| Bit rate | BR | 10.3125 | Gb/s | ||
| Rate tolerance | -100 | +100 | ppm |
Electrical Interfaces
Transmitter Input Specification at TP1
| Parameters | Min | Typ. | Max | Unit | Remarks |
| Single ended input voltage tolerance | -0.3 | 4 | V | ||
| AC common mode input voltage tolerance | 15 | mVrms | |||
| J2 jitter tolerance | 0.17 | UI | |||
| J9 jitter tolerance | 0.29 | UI | |||
| DDPWS | 0.07 | UI | |||
| Eye mask coordinate: X1, X2, Y1, Y2 |
0.11, 0.31 95, 350 |
UI mV |
Hit ratio = 5e-5 | ||
Receiver Output Specification at TP4
| Parameters | Min | Typ. | Max | Unit | Remarks |
| Single ended output voltage | -0.3 | 4 | V | ||
| AC common mode output voltage | 7.5 | mVrms | |||
| J2 jitter | 0.42 | UI | |||
| J9 jitter | 0.65 | UI | |||
| Output transition time (20% to 80%) | 28 | ps | |||
| X1, X2, Y1, Y2 | 0.29, 0.5 150, 425 |
UI mV |
Hit ratio = 5e-5 | ||
Optical Interfaces
>Transmitter Specification at TP2
(Condition: Tc = 0 to 70° C)
| Parameters | Min | Typ. | Max | Unit | Remarks |
| Optical wavelength | 840 | 850 | 860 | nm | |
| RMS spectrum width | 0.65 | nm | |||
| Extinction ratio | 3 | 4.5 | 7 | dB | |
| Average launched power | -7.6 | 0.1 | 2.4 | dBm | |
| Optical modulation amplitude | -5.6 | 0 | 2.4 | dBm | |
| Optical return loss tolerance | 12 | dB | |||
| Transmitter eye mask definition {X1, X2, X3, Y1, Y2, Y3} | 0.23, 0.34, 0.43, 0.27, 0.35, 0.4 | Hit ratio = 5e-5 | |||
| Average launch power of OFF transmitter, each lane | -30 | dBm | |||
Receiver Specification at TP3
(Condition: Tc = 0 to 70° C)
| Parameters | Min | Typ. | Max | Unit | Remarks |
| Operation wavelength | 840 | 850 | 860 | nm | |
| Unstressed sensitivity (OMA)* | -11.5 | dBm | BER=1e-12 | ||
| Overload | 3 | dBm |
* USRS is measured with typical SR4 light source with 1m (3.28 ft.) OM3 fiber
MEDIA GALLERY
ORDERING INFORMATION
QSFP-40G-SR4
QSFP+ Pluggable Transceiver Module allows optical interoperability up to 100m (150m) using OM3 (OM4) MMF
