Ascent’s QSFP+ (Quad Small Form-factor Pluggable Plus) DAC passive cable assemblies are high performance, cost effective I/O solutions for 40G LAN, HPC and SAN applications. QSFP+ copper direct-attach cables are suitable for very short distances and offer a highly cost- effective way to establish a 40-Gigabit link between QSFP+ ports of QSFP+ switches within racks and across adjacent racks. Ascent’s QSFP+ passive copper cables are compliant with SFF-8436, QSFP+ MSA, and IEEE 802.3ba 40GBASE-CR4 They offer a low power consumption, short- reach interconnected applications. The cable each lane is capable of transmitting data at rates up to 10 Gb/s, providing an aggregated rate of 40 Gb/s.
· 4-channel full-duplex passive copper cable transceiver
· Support for multi-gigabit data rates: Up to 10.3 Gb/s per channel
· Maximum aggregate data rate: 41.2 Gb/s
· Wire AWG: 30AWG/26AWG/24AWG
· AC coupling of PECL signals
· All-metal housing for superior EMI performance
· Available lengths (in meters): 1, 3, 5, 7
· Single 3.3 V power supply
· Low power consumption: < 2 W
· High-density QSFP 38-pin connector
· Shielded copper twin axial design for reduced skew rate and cross-talk
· Compliant with QSFP MSA specifications
· Compliant with industry-standard QSFP+ form factor SFF-8436
· Compatible with Cisco, etc
Absolute Maximum Ratings
Parameter | Symbol | Min. | Max. | Unit | Notes |
Storage Temperature | Tst | -40 | 125 | °C | |
Operating Case Temperature | TC | -40 | 85 | °C | |
Relative Humidity (Non-Condensing) | RH | 0 | 85 | % | |
Power Supply Voltage | VCC3 | -0.3 | 3.6 | V | |
Voltage on LVTTL Input | Vilvttl | -0.3 | VCC3+0.2 | V | |
Data Rate per Lane | 1 | 10.3 | Gb/s |
Recommended Maximum Ratings
Parameter | Symbol | Min. | Max. | Unit | Notes |
Storage Temperature | Tst | -40 | 125 | °C | |
Operating Case Temperature | TC | -40 | 85 | °C | |
Relative Humidity (Non-Condensing) | RH | 0 | 85 | % | |
Power Supply Voltage | VCC3 | -0.3 | 3.6 | V | |
Voltage on LVTTL Input | Vilvttl | -0.3 | VCC3+0.2 | V | |
Data Rate per Lane | 1 | 10.3 | Gb/s |
Product Characteristics
Parameter | Symbol | Min. | Max. | Unit | Notes |
Operating Case Temperature | TC | -40 | 85 | °C | |
Relative Humidity (Non-Condensing) | RH | 0 | 85 | % | |
Power Supply Voltage | VCC3 | 3.135 | 3.465 | V | |
Power Supply Current | ICC3 | 750 | - | mA | |
Total Power Consumption | Pd | - | 2.0 | W |
High Speed Characteristics
Parameter | Symbol | Min. | Typ. | Max. | Unit | Note |
Differential Impedance | TDR | 90 | 100 | 110 | Ω | |
Insertion loss | SDD21 | -17.04 | dB | At 5.15625 GHz | ||
Differential Return Loss | SDD11 SDD22 | See 1 | dB | At 0.05 GHz to 4.1 GHz | ||
See 2 | dB | At 4.1 GHz to 11.1 GHz | ||||
Differential to common-mode return loss | SCD11 SCD22 | -10 | dB | At 0.2 to 11.1 GHz | ||
Common-mode to common- mode output return loss | SCC11 SCC22 | -3 | dB | At 0.01 to 11.1 GHz |
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