ASP-PR-GU-20 ONU - PON - Accelight Technologies, Inc.

ASP-PR-GU-20 ONU

Accelight’s ASP-PR-GU-20 Series is a transceiver for the optical network unit (ONU) of 10G GPON with 9.95328Gbps in downstream and 9.95328Gbps in upstream. ASP-PR-GU-20 series is high performance module for single fiber communications by using 1270nm burst-mode transmitter and 1577nm continuous-mode receiver. The transmitter section uses a DFB 1270nm laser and the receiver section uses an integrated 1577 nm detector preamplifier (IDP) mounted in an optical header and a limiting post-amplifier IC. CML interface is used for differential inputs and outputs. LVTTL logic control interface simplifies the interfaces to external circuitry.

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Product Details

Product Features

SFP+ Package with SC Receptacle

Single 3.3V power supply

9.95328Gbps / 1270 nm Burst-Mode Transmitter with DFB laser

9.95328Gbps / 1577nm High Sensitivity Continuous-Mode APD-TIA Receiver

LVTTL Tx_Burst, Tx_SD, LOS

LVTTL Sleep Mode for Power Consumption

Operating Case TemperatureStandard: 0℃~+70℃ Industrial: -40℃~+85℃

Compliant with SFF-8472 MSA

Compliant with ITU-T G.9807.1

Compliant with SFP+ MSA SFF-8431
Applications

XGS-PON application
Ordering information

Part No.
Input
Output
Burst- Mode
Interface
Temp.
Fiber
ASP-PR-GU-20
AC
AC
LVTTL
SC
Industrial
SMF

Performance Specifications

Functional Diagram

Absolute Maximum Ratings

Parameter	Symbol	Min.	Max.	Unit
Storage Temperature	Ts	-40	85	°C
Supply Voltage	Vcc	-0.5	4.0	V
Operating Relative Humidity	RH	5	95	%

Recommended Operating Conditions

Parameter	Symbol	Min.	Typical	Max.	Unit
Operating Case Temperature	Tc	-40		85	°C
Power Supply Voltage	Vcc	3.15	3.3	3.45	V
Power Supply Current	Icc			450	mA
Data Rate			9.95328		Gbps

Optical Characteristics

Parameter	Symbol	Min.	Typical	Max.	Unit
Data rate			9.95328		Gbps
Transmitter
Centre Wavelength	λC	1260	1270	1280	nm
Spectral Width (-20dB)	Δλ			1	nm
Side Mode Suppression Ratio	SMSR	30			dB
Average Output Power	Pout	+4		+9	dBm
Extinction Ratio	ER	6			dB
Rise/Fall Time(with-out filter)	tr/tf			38	ps
Output Optical Eye		ITU-T G.9807.1 Compliant
Optical Output Power with TX OFF	P_off			-45	dBm
Receiver
Centre Wavelength	λc	1575		1580	nm
Receiver Sensitivity	Pmin			-28	dBm
Overload Optical Power	Pmax	-8			dBm
LOS De-Assert	LOSD			-29	dBm
LOS Assert	LOSA	-42			dBm
LOS Hysteresis		0.5		6	dB
RSSI resolution @ Full temperature range		-3		+3	dB
WDM Filter ISO	ISO(1560)		35		dB
WDM Filter ISO	ISO(1600)		35		dB

Electrical Characteristics

Parameter	Symbol	Min.	Typ.	Max	Unit	Notes
Transmitter
CML Input(Differential)	Vin	200		1000	mVpp
Input Impedance (Differential)	Zin	85	100	115	ohm
Tx_Burst_Enable Input Voltage	H	2		Vcc	V
Tx_Burst_Enable Input Voltage	L	0		0.8	V
Tx_FAULT Output Voltage	H	2.4		Vcc+0.3	V
Tx_FAULT Output Voltage	L	0		0.4	V
Tx_SD Output Voltage	H	2.4		Vcc+0.3	V	Laser on indicator
Tx_SD Output Voltage	L	0		0.4	V	Laser off indicator
Receiver
CML Output(Differential)	Vout	340		900	mVpp	AC coupled outputs
Output Impedance (Differential)	Zout	80	100	120	ohm
Rx Los output Voltage	H	2.4		Vcc+0.3	V
Rx Los output Voltage	L	0		0.4	V
Rx Los Assert time	Tassert	-		100	us
Rx Los De-Assert time	TDe-assert	-		100	us

SFP+ Transceiver Electrical Pad Layout

Pin Descriptions

Pin	Name	Function	Plug Seq.
1	VeeT	Transmitter Ground	1
2	TX Fault	Transmitter Fault Indication	3
3	TX_Burst_Enable	Burst Enable	3
4	SDA	Module Definition 2	3
5	SCL	Module Definition 1	3
6	MOD-ABS	Module Definition 0	3
7	TX_SD	TX signal detector (LVTTL)	3
8	RX_LOS	Loss of Signal	3
9	P_Down	Power down (LVTTL)	3
10	VeeR	Receiver Ground	1
11	VeeR	Receiver Ground	1
12	RD-	Inv. Received Data Out	3
13	RD+	Received Data Out	3
14	VeeR	Receiver Ground	1
15	VccR	Receiver Power	2
16	VccT	Transmitter Power	2
17	VeeT	Transmitter Ground	1
18	TD+	Transmit Data In	3
19	TD-	Inv. Transmit Data In	3
20	VeeT	Transmitter Ground	1

EEPROM

The serial interface uses the 2-wire serial CMOS EEPROM protocol defined for the ATMEL AT24C02/04 family of components. When the serial protocol is activated, the host generates the serial clock signal (SCL). The positive edge clocks data into those segments of the EEPROM that are not writing protected within the SFP+ transceiver. The negative edge clocks data from the SFP+ transceiver. The serial data signal (SDA) is bi-directional for serial data transfer. The host uses SDA in conjunction with SCL to mark the start and end of serial protocol activation. The memories are organized as a series of 8-bit data words that can be addressed individually or sequentially.

The Module provides diagnostic information about the present operating conditions. The transceiver generates this diagnostic data by digitization of internal analog signals. Calibration and alarm/warning threshold data is written during device manufacture. Received power monitoring, transmitted power monitoring, bias current monitoring, supply voltage monitoring and temperature monitoring all are implemented. If the module is defined as external calibrated, the diagnostic data are raw A/D values and must be converted to real world units using calibration constants stored in EEPROM locations 56 – 95 at wire serial bus address A2h. The digital diagnostic memory map specific data field define as following .For detail EEPROM information, please refer to the related document of SFF 8472 Rev 10.2.

Digital Diagnostic Monitor Specification

Address	Parameter	Range	NOTES
96-97	Temperature	-40 to 90°C	Case Temperature
98-99	Vcc Voltage	0V to 6.55V
100-101	Bias Current	0 to 131mA	Unit 2 uA
102-103	TX Power	-10 to 8.2 dBm	Unit 0.2uW
104-105	RX Power	-30 to -8 dBm	Unit 0.1uW

Recommend Circuit Schematic

Mechanical Specification

Part No.	Input	Output	Burst- Mode	Interface	Temp.	Fiber
ASP-PR-GU-20	AC	AC	LVTTL	SC	Industrial	SMF