20km 1.25Gbps GBIC BiDi Transceiver SPT-GB341G-S20

SPT-GB341G-S20

1.25Gbps GBIC Bi-Directional Transceiver, 20km Reach 1310nm TX / 1490 nm RX

Features
Dual data-rate of 1.25Gbps/1.0625Gbps operation
1310nm FP laser and PIN photo detector for 20km transmission
Duplex SC optical interface
Standard serial ID information compatible with SFF-8053
+3.3V/5Vsingle power supply
RoHS Compliant
Operating case temperature:
Standard: 0 to +70℃

Applications
Switch to Switch interface
Switched backplane applications
Router/Server interface
Other optical transmission systems

Description
The GBIC transceiver is high performance, cost effective module supporting dual data-rate of 1.25Gbps/1.0625Gbps and 20km transmission distance with SMF.
The transceiver consists of two sections: The transmitter section incorporates a FP laser. And the receiver section consists of a PIN photodiode integrated with a trans-impedance preamplifier (TIA). All modules satisfy class I laser safety requirements.
The optical output can be disabled by a TTL logic high-level input of TX Disable. TX Fault is provided to indicate degradation of the laser. Loss of signal (LOS) output is provided to indicate the loss of an input optical signal of receiver.
The standard serial ID information Compatible with GBIC MSA describes the transceiver’s capabilities, standard interfaces, manufacturer and other information. The host equipment can access this information via the two-wire serial CMOS EEPROM protocol. For further information, please refer to SFF-8053.

Absolute Maximum Ratings
Stress in excess of the maximum absolute ratings can cause permanent damage to the module.

Parameter	Symbol	Min	Typical	Max	Unit
Maximum Supply Voltage	Vcc	0.5	-	4.5	V
Storage Temperature	TS	-40	-	100	℃
Relative Humidity	RH	0	-	+85	%

Recommended Operating Conditions

Parameter		Symbol	Min	Typical	Max	Unit
Operating Case Temperature	Standard	TC	0	-	+70	℃
Power Supply Voltage		VCC	3.1		5.5	V
Power Supply Current		Icc			300	mA
Data Rate	Gigabit Ethernet			1.25		Gbps
Data Rate	Fiber Channel			1.0625		Gbps

Optical and Electrical Characteristics

SPT-GB341G-S20: (1310nm FP and PIN, SC, 20km)
(Operating case temperature TC=25℃, VCC=3.3V)

Parameter		Symbol	Min.		Typical	Max.	Unit	Notes
Transmitter
Centre Wavelength		λC	1260		1310	1360	nm
Average Output Power		P0ut	-9			0	dBm
Spectral Width (RMS)		σ				4	nm	1
Extinction Ratio		ER	9				dB
Output Optical Eye		IEEE 802.3z and ANSI Fiber Channel compatible						2
Data Input Swing Differential		VIN	300			1860	mV	3
Input Differential Impedance		ZIN	90		100	110	Ω
TX Disable	Disable		2.0			Vcc	V
TX Disable	Enable		0			0.8	V
TX Fault	Fault		2.0			Vcc+0.3	V
TX Fault	Normal		0			0.8	V
Receiver
Centre Wavelength		λC		1470		1510	nm
Receiver Sensitivity						-23	dBm	4
Receiver Overload				-3			dBm	4
Optical Path Penalty						1	dB	5
LOS De-Assert		LOSD				-23	dBm
LOS Assert		LOSA		-30			dBm
LOS Hysteresis				1		4	dB
Data Output Swing Differential		VOUT		370		1800	mV	6

Notes:
1. The optical power is launched into SMF.
2. Measured with a PRBS 27-1 test pattern @1250Mbps.
3. PECL input, internally AC coupled and terminated.
4. Measured with a PRBS 27-1 test pattern @1250Mbps, BER ≤1×10-12.
5. Measured with a PRBS 27-1 test pattern @1250Mbps, over 20km G.652 SMF, BER ≤1×10-12.
6. Internally AC coupled.

EEPROM Section

The SFF-8053 defines a 256-byte memory map in EEPROM describing the transceiver’s capabilities, standard interfaces, manufacturer, and other information, which is accessible over a 2 wire serial interface at the 8-bit address 1010000X (A0h).

WDM GBIC EEPROM

Pin Definitions
Pin Diagram

WDM GBIC Pin Diagram

Pin Descriptions

Pin Name	Pin#	Name/ Function	Signal Specification
Receiver Signals
RGND	2,3, 11,14	Receiver Ground (maybe connected with TGND in GBIC)		Ground, to GBIC
VDDR	15	Receiver +3.3/5volt (maybe connected with VDDT in GBIC)		Power, to GBIC
-RX_DAT	12	Receive Data, Differential PECL		High speed serial. from GBIC
+RX_DAT	13	Receive Data, Differential PECL		High speed serial. from GBIC
RX_LOS	1	Receiver Loss of Signal, logichigh, open collector compatible, 4.7k to 10kΩ pullup to VDDT on host		Low speed, from GBIC
Transmittersignals
TGND	8,9, 17,20	Transmitter Ground (may connected with RGND internally)		Ground, to GBIC
VDDT	16	Transmitter +3.3/5 volt (maybe connected with VDDR in GBIC)		Power, to GBIC
-TX_DAT	18	Transmit Data, Differential PECL		High Speed serial, to GBIC
+TX_DAT	19	Transmit Data, Differential PECL		High speed serial, to GBIC
TX_DISABLE	7	Transmitter Disable, logichigh, open collector Compatible, 4.7k to 10kΩ pullup to VDDT on GBIC		Low speed, to GBIC
TX_FAULT	10	Transmitter, Fault, logichigh, open collector compatible, 4.7k to 10kΩ pullup to VDDT on host		Low speed, from GBIC
Controlsignals
MOD_DEF(0)	4	TTL low, output		Please reference SFF-8053, Annex D; Module definition”4”
MOD_DEF(1)	5	SCL serial clock signal, input
MOD_DEF(2)	6	SDA serial data signal, input/output