Hot-pluggable QSFP28 form factor
4 channels full-duplex transceiver module
Supports 103.125Gb/s aggregate bit rate
4 channels 850nm VCSEL array
Operating case temperature range: 0 to 70°C
Description Review
Product Overview
The LYCOM 100GBASE-SR4 100m QSFP28 optical transceiver, 100G QSFP28 SR4 (SFP-GQS-MPO101-SR4C) is designed for use in 100-Gigabit Ethernet links up to 100m over Multi-Mode Fiber (MMF). It is compliant with the QSFP28 MSA and IEEE 802.3bm 100GBASE-SR4 and CAUI-4. Digital diagnostics functions are available via the I2C interface, as specified by the QSFP28 MSA. It integrates 4 data lanes in each direction with 4×25.78125Gb/s bandwidth. The electrical interface uses a 38-contact edge type connector. The optical interface uses a 12-fiber MTP/MPO connector. This module incorporates LYCOM proven circuit and VCSEL technology to provide reliable long life, high performance, and consistent service.

Product Overview

Hot-pluggable QSFP28 form factor
4 channels full-duplex transceiver module
Supports 103.125Gb/s aggregate bit rate
4 channels 850nm VCSEL array
4 channels PIN photo-detector array
Internal CDR circuits on both receiver and transmitter channels
Supports CDR bypass
2.5W maximum power dissipation
Maximum link length of 70m on OM3 MMF and 100m on OM4 MMF
Single MTP/MPO receptacle
Operating case temperature range: 0 to 70°C
Single 3.3V power supply
RoHS-6 compliant (lead free)

Pin Descriptions       
Pin Logic Symbol Name/Description
1   GND Module Ground1
2 CML-I Tx2- Transmitter inverted data input
3 CML-I Tx2+ Transmitter non-inverted data input
4   GND Module Ground1
5 CML-I Tx4- Transmitter inverted data input
6 CML-I Tx4+ Transmitter non-inverted data input
7   GND Module Ground1
8 LVTTL-I MODSEIL Module Select2
9 LVTTL-I ResetL Module Reset2
10   VCCRx +3.3V Receiver Power Supply
11 LVCMOS-I SCL 2-wire Serial interface clock2
12 LVCMOS-I/O SDA 2-wire Serial interface data2
13   GND Module Ground1
14 CML-O RX3+ Receiver non-inverted data output
15 CML-O RX3- Receiver inverted data output
16   GND Module Ground1
17 CML-O RX1+ Receiver non-inverted data output
18 CML-O RX1- Receiver inverted data output
19   GND Module Ground1
20   GND Module Ground1
21 CML-O RX2- Receiver inverted data output
22 CML-O RX2+ Receiver non-inverted data output
23   GND Module Ground1
24 CML-O RX4- Receiver inverted data output
25 CML-O RX4+ Receiver non-inverted data output
26   GND Module Ground1
27 LVTTL-O ModPrsL Module Present, internal pulled down to GND
28 LVTTL-O IntL Interrupt output, should be pulled up on host board2
29   VCCTx +3.3V Transmitter Power Supply
30   VCC1 +3.3V Power Supply
31 LVTTL-I LPMode Low Power Mode2
32   GND Module Ground1
33 CML-I Tx3+ Transmitter non-inverted data input
34 CML-I Tx3- Transmitter inverted data input
35   GND Module Ground1
36 CML-I Tx1+ Transmitter non-inverted data input
37 CML-I Tx1- Transmitter inverted data input
38   GND Module Ground1
1. Module circuit ground is isolated from module chassis ground within the module.
2. Open collector should be pulled up with 4.7K to 10K ohms on host board to a voltage between 3.15V and 3.6V.


Ordering Information:      

Product Description Part Number
SFP-QSFP28 SR4, 103.125Gb/s, 850nm, 100m, MMF, MTP/MPO SFP-GQS-MPO101-SR4C
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