Ascent Communication Technology

QSFP AQ AOC 4G 10

ASCENT 40G QSFP+ to 4x10G SFP+ Active Optical breakout Cable can be used to convert a 40 G QSFP+ input into 4 × 10 G SFP+ outputs for high-speed storage and data applications.

• Supports 40G to 10G Ethernet interoperability

• Aggregate 4 discrete SFP+ 10G channels into single parallel QSFP+ 40G interface

• Maximum link length of 100m links on OM3 multimode fiber Or 150m links on OM4 multimode fiber

• Electrically hot-pluggable

• Electrical interface compliant to QSFP+ connector

• (SFF-8436) and SFP+ connectors (SFF-8431)

• Case operating temperature range:0°C to 70°C

Absolute Maximum Ratings

Parameter	Symbol	Value	Notes
Storage Temperature	Ts	‑40 °C to 85 °C
Relative Humidity	RH	5 % to 95 %
Power Supply Voltage	Vcc	‑0.3 V to 4.0 V
Signal Input Voltage		Vcc ‑0.3 V to Vcc + 0.3 V

Recommended Operating Conditions

Parameter	Symbol	Value	Notes
Case Operating Temperature	Tcase	0 °C to 70°C	Without air flow
Power Supply Voltage	Vcc	3.13 V to 3.46 V, 3.3 V typical
Power Supply Current	Icc	450 mA maximum	Per cable end
Data Rate	BR	10.3125 Gbps	Each channel

General Product Characteristics

Parameter	Value	Notes
Module Form Factor	QSFP+
Number of Lanes	4 Tx /Rx
Maximum Aggregate Data Rate	42.0
Maximum Data Rate per Lane	10.5
Standard Cable Lengths	3, 5, 7, 10, 50, 100	1
Protocols Supported	Typical applications include Infiniband, Fiber Channel, 40G Ethernet
Electrical Interface and Pin‑out	38‑pin edge connector	2
Standard Optical Cable Type	Multimode ribbon fiber cable assembly, riser‑rated
Maximum Power Consumption per End	1.5
Management Interface	Serial, I2C‑based, 400 kHz maximum frequency	3

Notes:

1. Please contact sales for other lengths

2. Pin‑out as defined by the QSFP+ MSA

3. As defined by the QSFP+ MSA

Electrical Characteristics

Parameter	Symbol	Value	Notes
Supply Voltage	Vcc1, VccTx, VccRx	3.14 V to 3.46 V, 3.3 V typical
Supply Current	Icc	450 mA maximum
Transmitter
Differential Data Input Swing	Vin,pp	180 mV to 1000 mV	1
Single‑Ended Input Voltage tolerance	VinT	‑0.3 V to 4.0 V
Receiver
Differential Data Output Swing	Vout,pp	300 to 850 mV	2
Single‑ended Output Voltage		‑0.3 V to 4.0 V

Notes:

1. AC coupled internally. See Figure 1 for input eye mask requirements. Self‑biasing 100Ω differential input.

2. AC coupled with 100Ω differential output impedance. See Figure 2 for output eye mask.

Figure 1 ‑ Transmitter Input Differential Signal Mask

Figure 2 ‑ Receiver Output Differential Signal Mask

High‑Speed Electrical Characteristics per Lane

Parameter‑Inputs	Symbol	Value	Notes
Reference Differential Input Impedance	Zd	100 Ω
Termination Mismatch	ΔZM	5% maximum	1
Input AC Common Mode Voltage		25 mV (RMS) maximum
Differential Input Return Loss	SDD11		2, 0.01 GHz to 4.1 GHz
	SDD11		3, 4.1 GHz to 11.1 GHz
Differential to Common Mode Loss	SCD11	‑10 dB maximum	0.01 GHz to 11.1 GHz
Jitter Tolerance (Total)	TJ	0.40 UI
Jitter Tolerance (Deterministic)	DJ	0.15 UI

Notes:

1. See SFF‑8431 section D.15 Termination Mismatch for definition and test recommendations

2. Reflection coefficient given by equation SDD11 (dB) < ‑12 + 2 * SQRT(f), with f in GHz. See Figure 3.

3. Reflection coefficient given by equation SDD11 (dB) < ‑6.3 + 13Log10(f/5.5), with f in GHz. See Figure 3

Figure 3 ‑ Maximum Transmitter Input and Receiver Output Differential Return Loss

Parameter‑Inputs	Symbol	Value	Notes
Reference Differential Output Impedance	Zd	100 Ω
Termination Mismatch	ΔZM	5 % maximum
Output AC Common Mode Voltage		15 mV (RMS) maximum
Differential Output Return Loss	SDD22		4, 0.01 GHz to 4.1 GHz
	SDD22		5, 4.1 GHz to 11.1 GHz
Common Mode Output Return Loss	SCC22		6, 0.01 GHz to 2.5 GHz
	SCC22	‑3 dB maximum	2.5 GHz to 11.1 GHz
Jitter Tolerance (Total)	TJ
Output Rise and Fall time (20 % to 80 %)	tRH, tFH	24 ps minimum
Deterministic Jitter	DJOUT	0.38 UI	7
Total Jitter	TJOUT	0.64 UI	7