Ascent Communication Technology

10G SFP+ CWDM 10 km

The DFPP-LP-CXX-10 is a high-performance 10G CWDM SFP+ transceiver engineered for optical data transmission and reception over single-mode fiber links up to 10 kilometers. Designed for demanding 10GBASE-LR applications, this module features a CWDM DFB laser and complies with SFI electrical specifications, ensuring robust signal integrity and minimal EMI through differential AC coupling and high-quality termination. The transceiver's transmitter section converts high-speed electrical data into optical signals, featuring an internal Automatic Power Control (APC) loop that maintains consistent optical output despite voltage or temperature changes. It includes important safety and diagnostic functions, such as TX_Disable and TX_Fault indicators, providing system-level control and real-time fault detection. These functions help ensure reliable operation and simplify integration into network equipment. On the receiving end, the module transforms incoming 10Gbps optical signals into PECL/CML electrical outputs, with a built-in Loss of Signal (Rx_LOS) feature that alerts the host system to degraded or absent signal conditions. This makes the DFPP-LP-CXX-10 ideal for ensuring high data integrity in long-reach optical links, helping identify issues such as disconnected cables or non-functioning transmitters. Overall, it offers a compact and efficient solution for CWDM optical networking with a strong emphasis on stability, reliability, and compliance with industry standards.

· 10Gb/s serial optical interface compliant to 802.3ae 10GBASE-LR

· Electrical interface compliant to SFF-8431

· Small Form Factor Pluggable compliant to SFF-8432

· LC Duplex connector

· CWDM DFB transmitter, PIN photo-detector

· 2-wire interface for management specifications compliant with SFF 8472 digital diagnostic monitoring interface for optical transceivers

· Low EMI

· Low power consumption

· Advanced firmware allow customer system encryption information to be stored in transceiver

· Cost effective SFP+ solution, enables higher port densities and greater bandwidth

· RoHS compliant

· Operating case temperature range:

Commercial: 0 to 70 °C

Industrial: -40 to 85 °C

Recommended Operating Conditions

Recommended Operating Environment specifies parameters for which the electrical and optical characteristics hold unless otherwise noted.

Parameter	Symbol	Min.	Typ.	Max.	Unit	Note
Power Supply Voltage	V_cc	3.135	3.3	3.465	V
Power Supply Current	I_cc			350	mA
Operating Case Temperature	T_C	0	25	70	°C
Relative Humidity	RH	5		95		%

Optical Characteristics

Parameter	Values	Unit
Operating Reach	10	km
Transmitter
Center Wavelength (Range)	1391, 1411, 1431, 1451, 1471, 1491, 1511, 1531, 1551, 1571, 1591, 1611	nm
Side Mode Suppression Ratio (Min)	30	dB
Output Power	0 to 6	dBm
Average Launch Power	0 to 6	dBm
Transmitter and Dispersion Penalty (Max)	3.2	dB
Average Launch Power of OFF Transmitter (Max)	-30	dBm
Extinction Ratio (Min)	3.5	dB
RIN12 OMA (Max)	-128	dB/Hz

Optical Return Loss Tolerance (min)	12	dB
Receiver
Center Wavelength (Range)	1391, 1411, 1431, 1451, 1471, 1491, 1511, 1531, 1551, 1571, 1591, 1611	nm
Receive Overload (Max) in Average Power (Note 1)	0.5	dBm
Receive Sensitivity (Min) in Average Power (Note 2)	-14.4	dBm
Receiver Reflectance (Max)	-12	dB
Los Assert (Min)	-30	dBm
Los Dessert (Max)	-15	dBm
Los Hysteresis(min)	0.5	dB
Receive Electrical 3dB Upper Cutoff Frequency (Max)	12.3	dBm
Receiver Power (Damage, Max)	+7	dBm

Notes:

1. Average optical power shall be measured using the methods specified in TIA/EIA-455-95.

2. Measured with a PRBS 2^{^31}-1 test pattern, @ 10.325 Gb/s, BER≤10^{^-12.}

3. Path penalty is intended as the power penalty of the interface between back-to-back and the maximum applied dispersion.

Electrical Characteristics

The following electrical characteristics are defined over the Recommended Operating Environment unless otherwise specified.

Parameter	Symbol	Min.	Typ.	Max.	Unit	Note
Data Rate		9.95	10.3125	11.3	Gbps
Power Consumption				1.5	mW
Transmitter
Single Ended Output Voltage Tolerance		-0.3		4	V
C common Mode Voltage Tolerance		15			mV
Tx Input Diff Voltage	VI	180		800	mV
Tx Fault	VoL	-0.3		0.4	V	At 0.7mA
Data Dependent Input Jitter	DDJ			0.1	UI
Data Input Total Jitter	TJ			0.28	UI
Receiver
Single Ended Output Voltage Tolerance		-0.3		4	V
Rx Output Diff Voltage	Vo	300		850	mV
Rx Output Rise and Fall Time	Tr/Tf	30			ps	20% to 80%

Total Jitter	TJ			0.7	UI
Deterministic Jitter	DJ			0.42	UI

Control and Status I/O Timing Characteristics

Timing characteristics of control and status I/O are included in Pin Description table, which is also defined in SFF-8431.

Parameter	Symbol	Min.	Typ.	Max.	Unit	Note
TX Disable Assert Time	t_off			10	μs	Time from rising edge of TX Disable to when the optical output falls below 10% of nominal
TX Disable Negate Time	t_on			1	ms	Time from falling edge of TX Disable to when the modulated optical output rises above 90% of nominal
Time to Initialize, including Reset of TX_Fault	t_init			300	ms	From power on or negation of TX Fault using TX Disable
TX Fault Assert Time	t_fault			100	μs	Time from fault to TX fault on
TX Disable to Reset	t_reset	10			μs	Time TX Disable must be held high to reset TX fault
LOS Assert Time	t_loss_on			100	μs	Time from LoS state to RX LOS assert
LOS Deassert Time	t_loss_off			100	μs	Time from non-LOS state to RX LOS deassert
Rate-Select Change Time	t_ratesel			10	μs	Time from rising or falling edge of Rate Select input until receiver bandwidth is in conformance with appropriate specification
Serial lD Clock Rate	t_serial_clock			100	kHz

Digital Diagnostic Functions

The following digital diagnostic characteristics are defined over the Recommended Operating Environment unless otherwise specified. It is compliant to SFF8472 Rev10.2 with internal calibration mode. For external calibration mode please contact our sales stuff.

Parameter	Symbol	Min	Typ.	Max	Unit	Note
Temperature Monitor Absolute Error	DMI_Temp	-3		3	°C	Over operating temp
Laser Power Monitor Absolute Error	DMI_TX	-3		3	dB
RX Power Monitor Absolute Error	DMI_RX	-3		3	dB	-7dBm to -20dBm range
Supply Voltage Monitor Absolute Error	DMI_VCC	-0.08		0.08	V	Full operating range
Bias Current Monitor	DMI_Ibias	-10%		10%	mA