155M CWDM 120km LC SFP Transceiver
Features
* Data-rate of 155Mbps operation
* 9 CWDM DFB wavelengths laser and PIN photodetector for 120km transmission
* Compliant with SFP MSA and SFF-8472 with duplex LC receptacle
* Digital Diagnostic Monitoring:
Internal Calibration or External Calibration
* Compatible with RoHS
* +3.3V single power supply
* Operating case temperature: 0 to +70°C/-40~85°C
Applications
* Gigabit Ethernet
* Fiber Channel
* Switch to Switch interface
* Switched backplane applications
* Router/Server interface
* Other optical transmission systems
Description
The SFP transceivers are high performance, cost effective modules supporting data-rate of 155Mbps and 120km transmission distance with SMF.
The transceiver consists of three sections: an uncooled CWDM DFB laser transmitter, a PIN photodiode integrated with a trans-impedance preamplifier (TIA) and MCU control unit. All modules satisfy class I laser safety requirements.
The transceivers are compatible with SFP Multi-Source Agreement (MSA) and SFF-8472. For further information, please refer to SFP MSA.
Absolute Maximum Ratings
Table 1 - Absolute Maximum Ratings
|
Parameter |
Symbol |
Min |
Max |
Unit |
|
Supply Voltage |
Vcc |
-0.5 |
4.5 |
V |
|
Storage Temperature |
Ts |
-40 |
+85 |
°C |
|
Operating Humidity |
- |
5 |
95 |
% |
Recommended Operating Conditions
Table 2 - Recommended Operating Conditions
|
Parameter |
Symbol |
Min |
Typical |
Max |
Unit |
|
|
Operating Case Temperature |
Standard |
Tc |
0 |
|
+70 |
°C |
|
Power Supply Voltage |
Vcc |
3.13 |
3.3 |
3.47 |
V |
|
|
Power Supply Current |
Icc |
|
|
300 |
mA |
|
|
Data Rate |
|
|
155 |
|
Mbps |
|
Table3 -λC Wavelength Guide
|
λC Wavelength Guide |
|||||
|
Code |
λC |
Unit |
Code |
λC |
Unit |
|
45 |
1450 |
nm |
55 |
1550 |
nm |
|
47 |
1470 |
nm |
57 |
1570 |
nm |
|
49 |
1490 |
nm |
59 |
1590 |
nm |
|
51 |
1510 |
nm |
61 |
1610 |
nm |
|
53 |
1530 |
nm |
|
|
|
Table 4 - Optical and Electrical Characteristics
|
Parameter |
Symbol |
Min |
Typical |
Max |
Unit |
Notes |
||
|
Transmitter |
||||||||
|
Centre Wavelength |
λc |
λc-6.5 |
λc |
λc+6.5 |
nm |
|
||
|
Spectral Width (-20dB) |
∆λ |
|
|
1 |
nm |
|
||
|
Side Mode Suppression Ratio |
SMSR |
30 |
|
|
dB |
|
||
|
Average Output Power |
Pout |
0 |
|
5 |
dBm |
1 |
||
|
Extinction Ratio |
ER |
10 |
|
|
dB |
|
||
|
Jitter Generation (RMS) |
|
|
|
0.01 |
UI |
|
||
|
Jitter Generation (PK-PK) |
|
|
|
0.1 |
UI |
|
||
|
Output Optical Eye |
Compliant Telcordia GR-253-CORE and ITU-T G.957 |
|
||||||
|
Optical Rise/Fall Time (20%~80%) |
tr/tf |
|
|
0.26 |
ns |
|
||
|
Data Input Swing Differential |
VIN |
300 |
|
1860 |
mV |
2 |
||
|
Input Differential Impedance |
ZIN |
90 |
100 |
110 |
Ω |
|
||
|
TX Disable |
Disable |
|
2.0 |
|
Vcc |
V |
|
|
|
Enable |
|
0 |
|
0.8 |
V |
|
||
|
TX Fault |
Fault |
|
2.0 |
|
Vcc |
V |
|
|
|
Normal |
|
0 |
|
0.8 |
V |
|
||
|
Receiver |
||||||||
|
Centre Wavelength |
λc |
1260 |
|
1620 |
nm |
|
||
|
Receiver Sensitivity |
|
|
|
-34 |
dBm |
3 |
||
|
Receiver Overload |
|
-10 |
|
|
dBm |
3 |
||
|
LOS De-Assert |
LOSD |
|
|
-38 |
dBm |
|
||
|
LOS Assert |
LOSA |
-45 |
|
|
dBm |
|
||
|
LOS Hysteresis |
|
1 |
|
4 |
dB |
|
||
|
Data Output Swing Differential |
Vout |
370 |
|
1800 |
mV |
4 |
||
|
LOS |
High |
2.0 |
|
Vcc |
V |
|
||
|
Low |
0 |
|
0.8 |
V |
|
|||
Notes:
- The optical power is launched into SMF.
- PECL input, internally AC-coupled and terminated.
- Measured with a PRBS 223-1 test pattern @155Mbps, BER ≤1×10-12.
- Internally AC-coupled.
Timing and Electrical
Table 5 - Timing and Electrical
|
Parameter |
Symbol |
Min |
Typical |
Max |
Unit |
|
Tx Disable Negate Time |
t_on |
|
|
1 |
ms |
|
Tx Disable Assert Time |
t_off |
|
|
10 |
µs |
|
Time To Initialize, including Reset of Tx Fault |
t_init |
|
|
300 |
ms |
|
Tx Fault Assert Time |
t_fault |
|
|
100 |
µs |
|
Tx Disable To Reset |
t_reset |
10 |
|
|
µs |
|
LOS Assert Time |
t_loss_on |
|
|
100 |
µs |
|
LOS De-assert Time |
t_loss_off |
|
|
100 |
µs |
|
Serial ID Clock Rate |
f_serial_clock |
|
|
400 |
KHz |
|
MOD_DEF (0:2)-High |
VH |
2 |
|
Vcc |
V |
|
MOD_DEF (0:2)-Low |
VL |
|
|
0.8 |
V |
EEPROM Information
The SFP MSA 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). The memory contents refer to Table 6.
Table 6 - EEPROM Serial ID Memory Contents (A0h)
|
Addr. |
Field Size (Bytes) |
Name of Field |
Hex |
Description |
|
0 |
1 |
Identifier |
03 |
SFP |
|
1 |
1 |
Ext. Identifier |
04 |
MOD4 |
|
2 |
1 |
Connector |
07 |
LC |
|
3—10 |
8 |
Transceiver |
00 08 04 00 00 00 00 00 |
OC-3,Single mode long reach |
|
11 |
1 |
Encoding |
03 |
NRZ |
|
12 |
1 |
BR, nominal |
02 |
155Mbps |
|
13 |
1 |
Reserved |
00 |
|
|
14 |
1 |
Length (9um)-km |
78 |
120km |
|
15 |
1 |
Length (9um) |
FF |
120km |
|
16 |
1 |
Length (50um) |
00 |
|
|
17 |
1 |
Length (62.5um) |
00 |
|
|
18 |
1 |
Length (copper) |
00 |
|
|
19 |
1 |
Reserved |
00 |
|
|
20—35 |
16 |
Vendor name |
47 69 67 61 BT 69 67 68 74 20 20 20 20 20 20 20 |
"BTON" |
|
36 |
1 |
Reserved |
00 |
|
|
37—39 |
3 |
Vendor OUI |
00 00 00 |
|
|
40—55 |
16 |
Vendor PN |
47 50 43 2D 34 35 30 33 2D 31 32 43 44 20 20 20 |
“BT-OC3-120xxxx”(ASCⅡ) |
|
56—59 |
4 |
Vendor rev |
xx xx xx xx |
xx.xx revision (ASCⅡ) |
|
60-61 |
2 |
Wavelength |
05 AA |
1450nm |
|
62 |
1 |
Reserved |
00 |
|
|
63 |
1 |
CC BASE |
xx |
Check sum of bytes 0 - 62 |
|
64—65 |
2 |
Options |
00 1A |
LOS,TX_FAULT and TX_DISABLE |
|
66 |
1 |
BR, max |
00 |
|
|
67 |
1 |
BR, min |
00 |
|
|
68—83 |
16 |
Vendor SN |
xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx |
ASCⅡ |
|
84—91 |
8 |
Vendor date code |
xx xx xx xx xx xx 20 20 |
Year(2 bytes),Month(2 bytes),Day(2 bytes) |
|
92 |
1 |
Diagnostic type |
xx |
Diagnostics |
|
93 |
1 |
Enhanced option |
80 |
Diagnostics(Optional Alarm/warning flags) |
|
94 |
1 |
SFF-8472 |
01 |
Diagnostics(SFF-8472 Rev 9.3) |
|
95 |
1 |
CC EXT |
xx |
Check sum of bytes 64 - 94 |
|
96—255 |
160 |
|
|
|
Diagnostics
Table 7 – Diagnostics Specification
|
Parameter |
Range |
Unit |
Accuracy |
Calibration |
|
Temperature |
0 to +70 |
°C |
±3°C |
Internal / External |
|
Voltage |
3.0 to 3.6 |
V |
±3% |
Internal / External |
|
Bias Current |
0 to 100 |
mA |
±10% |
Internal / External |
|
TX Power |
0 to +5 |
dBm |
±3dB |
Internal / External |
|
RX Power |
-33 to -9 |
dBm |
±3dB |
Internal / External |
Ordering information
|
Part Number |
Product Description |
|
BT-OC3-120xxxx |
155Mbps CWDM 120km LC SFP 0~70℃ |
xxxx= Wavelength 1270~1610nm, with a 20nm step.
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