QSFP+ Direct Attach Passive Copper Cable

The QSFP+ passive cable assemblies are high performance,cost effective I/O solutions for 40G LAN, HPC and SAN applications. The QSFP+ passive copper cables are compliant with SFF-8436, QSFP+MSA and IEEE P802.3ba 40GBASE-CR4. It is offer a low power consumption,short reach interconnect applications. The cable each lane is capable of transmitting data at rates up to 10Gb/s, providing an aggregated rate of 40Gb/s


  • QSFP+ conforms to the Small Form Factor SFF-8436
  • 4-Channel Full-Duplex Passive Copper Cable Transceiver
  • Support for multi-gigabit data rates :1 Gb/s – 10 Gb/s (per channel)
  • Maximum aggregate data rate: 40 Gb/s (4 x 10Gb/s)
  • Copper link length up to 5m (passive limiting)
  • High-Density QSFP 38-PIN Connector
  • Power Supply :+3.3V
  • Low power consumption: 0.02 W (typ.)
  • I2C based two-wire serial interface for
  • EEPROM signature which can be customized
  • Temperature Range: 0~ 70 °C
  • 10 Gigabit Ethernet
  • 40 Gigabit Ethernet
  • InfiniBand4x SDR, DDR, QDR
  • 2, 4, 8, 10 Gigabit Fiber Channel
  • Fiber Channel over Ethernet
  • SAS,Servers,Hubs,Switches,Routers
Recommended Operating Conditions
Parameter Symbol Min Typical Max Unit
Storage Ambient Temperature -40 85 °C
Operating Case Temperature Tc 0 70 °C
Power Supply Voltage VCC3 3.14 3.3 3.47 V
Power Dissipation PD 0.02 W
Pin Logic Symbol Name/Description Notes
1 GND Ground 1
2 CML-I Tx2n Transmitter Inverted Data Input
3 CML-I Tx2p Transmitter Non-Inverted Data Input
4 GND Ground 1
5 CML-I Tx4n Transmitter Inverted Data Input
6 CML-I Tx4p Transmitter Non-Inverted Data Input
7 GND Ground 1
8 LVTTL-I ModSelL Module Select
9 LVTTL-I ResetL Module Reset
10 Vcc Rx +3.3V Power Supply Receiver 2
11 LVCMOSI/O SCL 2-wire serial interface clock
12 LVCMOSI/O SDA 2-wire serial interface data
13 GND Ground 1
14 CML-O Rx3p Receiver Non-Inverted Data Output
15 CML-O Rx3n Receiver Inverted Data Output
16 GND Ground 1
17 CML-O Rx1p Receiver Non-Inverted Data Output
18 CML-O Rx1n Receiver Inverted Data Output
19 GND Ground 1
20 GND Ground 1
21 CML-O Rx2n Receiver Inverted Data Output
22 CML-O Rx2p Receiver Non-Inverted Data Output
23 GND Ground 1
24 CML-O Rx4n Receiver Inverted Data Output
25 CML-O Rx4p Receiver Non-Inverted Data Output
26 GND Ground 1
27 LVTTL-O ModPrsL Module Present
28 LVTTL-O IntL Interrupt
29 Vcc Tx +3.3V Power supply transmitter 2
30 Vcc1 +3.3V Power supply 2
31 LVTTL-I LPMode Low Power Mode
32 GND Ground 1
33 CML-I Tx3p Transmitter Non-Inverted Data Input
34 CML-I Tx3n Transmitter Inverted Data Input
35 GND Ground 1
36 CML-I Tx1p Transmitter Non-Inverted Data Input
37 CML-I Tx1n Transmitter Inverted Data Input
38 GND Ground 1


Note 1: GND is the symbol for signal and supply (power) common for the QSFP+ module. All are common within the QSFP+ module and all module voltages are referenced to this potential unless otherwise noted. Connect these directly to the host board signal-common ground plane.

Note 2: Vcc Rx, Vcc1 and Vcc Tx are the receiver and transmitter power supplies and shall be applied concurrently. Requirements defined for the host side of the Host Edge Card Connector are listed in Table 6. Recommended host board power supply filtering is shown in Figure 4. Vcc Rx Vcc1 and Vcc Tx may be internally connected within the QSFP+ Module module in any combination. The connector pins are each rated for a maximum current of 500 mA.

X1:1m/30AWG X2:2m/30AWG X3:3m/30AWG X4:4m/26AWG X5:5m/26AWG