Products+
1.25Gbps BIDI Tx1550/Rx1490nm 120km Compatible SFP Transceiver
1.25Gbps SFP Bi-Directional Transceiver, 120KM Reach, LC Connector SMF Tx1550nm/Rx1490nm, fully tested compatible for over 100 vendors.
Features
> Dual data-rate of 1.25Gbps/1.063Gbps operation
> 120km with 9/125µm SMF
> 1550/1490nm DFB laser
> 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
Applications
> Gigabit Ethernet
> Fiber Channel
> Switch to Switch interface
> Switched backplane application
> Router/Server interface
> Other optical transmission systems
Description
The SFPs are small form factor pluggable (SFP) transceivers compatible with multi-sourcing agreement (MSA). It is suitable for single-mode fiber (SMF) communications in 1.25Gbps Ethernet and 1G/2G Fiber Channel.
Regulatory Compliance
The SFPs are Class 1 Laser Products comply with FDA regulations. Meet Class 1 eye safety requirements of EN 60825 and the electrical safety requirements of EN 60950.
|
PART NUMBER |
TX/RX |
DISTANCE |
LASER |
TEMPERATURE |
|
ST-OC24-120B |
1550/1490nm |
120km |
DFB/APD |
COM 0~70℃ |
|
ST-OC24-120BI |
1550/1490nm |
120km |
DFB/ APD |
IND -40~85℃ |
Absolute Maximum Ratings
|
Parameter |
Symbol |
Min. |
Max. |
Unit |
|
|
Supply Voltage |
VCC |
-0.5 |
4.5 |
V |
|
|
Storage Temperature |
TS |
-40 |
85 |
°C |
|
|
BT-OC24-120B |
Operating Temperature |
TC |
0 |
70 |
°C |
|
BT-OC24-120B |
Operating Temperature |
TC |
-40 |
85 |
°C |
Recommended Operating Conditions
|
Parameter |
Symbol |
Min. |
Typical |
Max. |
Unit |
|
|
BT-OC24-120B |
Operating Temperature |
TC |
0 |
|
70 |
°C |
|
BT-OC24-120BI |
TC |
-40 |
|
85 |
°C |
|
|
Power Supply Voltage |
VCC |
3.13 |
3.3 |
3.47 |
V |
|
|
Power Supply Current |
ICC |
|
|
300 |
mA |
|
|
Data Rate |
|
|
1.25 |
|
GBps |
|
|
Max Link Length on 9/125µm SMF |
Lmax |
|
|
120 |
km |
|
Optical Characteristics
|
Parameter |
Symbol |
Min. |
Typical |
Max. |
Unit |
|
Transmitter |
|||||
|
Centre Wavelength |
λc |
1530 |
1550 |
1570 |
nm |
|
Spectral Width (-20dB) |
σ |
|
|
1 |
nm |
|
Average Output Power |
Pout |
0 |
|
5 |
dBm |
|
Extinction Ratio |
ER |
9 |
|
|
dB |
|
Optical Rise/Fall Time |
tr/tf |
|
|
0.26 |
ns |
|
Receiver |
|||||
|
Centre Wavelength |
λc |
1470 |
1490 |
1510 |
nm |
|
Receiver Sensitivity |
PIN |
|
|
-30 |
dBm |
|
Receiver Overload |
PMAX |
-9 |
|
|
dBm |
|
LOS De-Assert |
LOSD |
|
|
-31 |
dBm |
|
LOS Assert |
LOSA |
-37 |
|
|
dBm |
|
LOS Hysteresis |
|
1 |
|
4 |
dB |
Electrical Characteristics
|
Parameter |
Symbol |
Min. |
Typical |
Max. |
Unit |
|
Transmitter |
|||||
|
Input Differential Impedance |
Zin |
90 |
100 |
110 |
Ω |
|
Data Input Swing Differential |
Vin |
500 |
|
2400 |
mV |
|
Tx-Dis Disable |
Vd |
2.0 |
|
Vcc |
V |
|
Tx-Dis Enable |
Ven |
0 |
|
0.8 |
V |
|
TX-Fault (Fault) |
|
2.0 |
|
Vcc+0.3 |
V |
|
TX-Fault (Normal) |
|
0 |
|
0.8 |
V |
|
Receiver |
|||||
|
Data Output Swing Differential |
Vout |
370 |
|
2000 |
mV |
|
Rx-Los Fault |
Vlf |
2.0 |
|
Vcc+0.3 |
V |
|
Rx-Los Normal |
Vln |
0 |
|
0+0.8 |
V |
Pin Descriptions
|
Pin |
Symbol |
Description |
Ref. |
|
1 |
VEET |
Transmitter Ground (Common with Receiver Ground) |
6.1 |
|
2 |
TFAULT |
Transmitter Fault. Not supported. |
|
|
3 |
TDIS |
Transmitter Disable. Laser output disabled on high or open. |
6.2 |
|
4 |
MOD_DEF(2) |
Module Definition 2. Data line for Serial ID. |
6.3 |
|
5 |
MOD_DEF(1) |
Module Definition 1. Clock line for Serial ID. |
6.3 |
|
6 |
MOD_DEF(0) |
Module Definition 0. Grounded within the module. |
6.3 |
|
7 |
Rate Select |
No connection required |
|
|
8 |
LOS |
Loss of Signal indication. Logic 0 indicates normal operation. |
6.4 |
|
9 |
VEER |
Receiver Ground (Common with Transmitter Ground) |
6.1 |
|
10 |
VEER |
Receiver Ground (Common with Transmitter Ground) |
6.1 |
|
11 |
VEER |
Receiver Ground (Common with Transmitter Ground) |
6.1 |
|
12 |
RD- |
Receiver Inverted DATA out. AC Coupled. |
|
|
13 |
RD+ |
Receiver Non-inverted DATA out. AC Coupled. |
|
|
14 |
VEER |
Receiver Ground (Common with Transmitter Ground) |
6.1 |
|
15 |
VCCR |
Receiver Power Supply |
|
|
16 |
VCCT |
Transmitter Power Supply |
|
|
17 |
VEET |
Transmitter Ground (Common with Receiver Ground) |
6.1 |
|
18 |
TD+ |
Transmitter Non-Inverted DATA in. AC Coupled. |
|
|
19 |
TD- |
Transmitter Inverted DATA in. AC Coupled. |
|
|
20 |
VEET |
Transmitter Ground (Common with Receiver Ground) |
6.1 |
Notes:
* Circuit ground is internally isolated from chassis ground.
* Laser output disabled on TDIS >2.0V or open, enabled on TDIS <0.8V.
* Should be pulled up with 4.7k - 10kohms on host board to a voltage between 2.0V and 3.6V. MOD_DEF(0) pulls line low to indicate module is plugged in.
* LOS is open collector output. Should be pulled up with 4.7k -10kohms on host board to a voltage between 2.0V and 3.6V. Logic 0 indicates normal operation; logic 1 indicates loss of signal.
EEPROM & DDM THRESHOLD
EEPROM
2 wire address 1010000X (A0h)
|
0~95 Serial ID Defined by SFP MSA (96 bytes) |
|
96~127 Vendor Speific (32 bytes) |
|
128~255 Reserved (128 bytes) |
DDM THRESHOLD
|
|
Low Alarm |
Low Warn |
High Warn |
High Alarm |
|
|
Temp |
BT-OC24-120B |
-45℃ |
-40℃ |
85℃ |
88℃ |
|
Temp |
BT-OC24-120BI |
-10℃ |
-6℃ |
85℃ |
90℃ |
|
Voltage |
3V |
3.1V |
3.5V |
3.6V |
|
|
Tx Bias BT-OC24-120B |
15mA |
20mA |
70mA |
75mA |
|
|
Tx Bias BT-OC24-120BI |
15mA |
20mA |
120mA |
130mA |
|
|
Tx Power |
-4dBm |
-3dBm |
6dBm |
7dBm |
|
|
Rx Power |
-32dBm |
-31dBm |
1dBm |
3dBm |
|
