Alpha Bridge SFP ASFP-1G-LX
Features
- SFP Multi-Source Agreement compliance.
- Compliant with Fiber Channel 100-SM-LC-L standard.
- Compliant with IEEE802.3z Gigabit Ethernet standard.
- Industry standard small form pluggable (SFP) package.
- Duplex LC connector.
- Differential LVPECL inputs and outputs.
- Single power supply 3V.
- TTL signal detect indicator.
- Hot Pluggable.
- Class 1 laser product complies with EN 60825-1.
- RoHS compliant.
Applications
- Distributed multi-processing.
- Switch to switch interface.
- High speed I/O for file server.
- Bus extension application.
- Channel extender, data storage.
Absolute Maximum Ratings ASFP-1G-LX
| Parameter | Symbol | Min. | Max. | Units | Note |
| Storage Temperature | Ts | -40 | 85 | °C | |
| Supply Voltage | Vcc | -0.5 | 4 | V | |
| Input Voltage | VIN | -0.5 | Vcc | V | |
| Output current | Io | --- | 50 | MA | |
| Operating current | IOP | --- | 400 | MA |
Recommended Operating Conditions ASFP-1G-LX
| Parameter | Symbol | Min. | Max. | Units | Note |
| Case operating Temperature | Tc | 0 | 70 | °C | Abtpl-S10-13-C |
| -40 | 85 | °C | Abtpl-S10-13-I | ||
| Supply Voltage | Vcc | 3.1 | 3.5 | V | |
| Supply Current | ITX + IRX | --- | 250 | MA |
Transmitter Electro-optical Characteristics ASFP-1G-LX
| Parameter | Symbol | Min. | Typ. | Max. | Units | Note |
| Output Optical Power9/125 mm fiber | Pout | -9.5 | --- | -3 | dBm | Average |
| Extinction Ratio | ER | 9 | --- | --- | dB | |
| Center Wavelength | lC | 1270 | 1310 | 1355 | nm | |
| Spectral Width (RMS) | Dl | --- | --- | 2.5 | nm | |
| Rise/Fall Time, (20-80%) | Tr, f | --- | --- | 260 | ps | |
| Relative Intensity Noise | RIN | --- | --- | -120 | dB/Hz | |
| Total Jitter | TJ | --- | --- | 227 | ps | |
| Output Eye | Compliant with IEEE802.3z | |||||
| Max. Pout TX-DISABLE Asserted | POFF | --- | --- | -45 | dBm | |
| Differential Input Voltage | VDIFF | 0.4 | --- | 2.0 | V | |
Receiver Electro-optical Characteristics ASFP-1G-LX
| Parameter | Symbol | Min. | Typ. | Max. | Units | Note |
| Optical Input Power-maximum | PIN | -3 | --- | --- | dBm | BER < 10-12 |
| Optical Input Power-minimum (Sensitivity) | PIN | --- | --- | -20 | dBm | BER < 10-12 |
| Operating Center Wavelength | lC | 1260 | --- | 1610 | nm | |
| Optical Return Loss | ORL | 12 | --- | --- | dB | |
| Signal Detect-Asserted | PA | --- | --- | -20 | dBm | |
| Signal Detect-Deasserted | PD | -35 | --- | --- | dBm | |
| Differential Output Voltage | VDIFF | 0.5 | --- | 1.2 | V | |
| Data Output Rise, Fall Time (20-80%) | T r, f | --- | --- | 0.35 | ns | |
| Receiver Loss of Signal Output Voltage-Low | RX_LOSL | 0 | --- | 0.5 | V | |
| Receiver Loss of Signal Output Voltage- High | RX_LOSH | 2.4 | --- | VCC | V |
Block Diagram of Transceiver
Transmitter Section
The transmitter section consists of a 1310 nm InGaAsP laser in an eye safe optical subassembly (OSA) which mate to the fiber cable. The laser OSA is driven by a LD driver IC which converts differential input LVPECL logicsignals into an analog laser driving current.
TX_DISABLE
The TX_DISABLE signal is high (TTL logic “1”) to turn off the laser output. The laser will turn on within 1ms when TX_DISABLE is low (TTL logic “0”).
Receiver Section
The receiver utilizes a MSM detector integrated with a trans-impedance preamplifier in an OSA. This OSA isconnected to a circuit providing post-amplification quantization, and optical signal detection.
Receive Loss (RX_LOS)
The RX_LOS is high (logic “1”) when there is no incoming light from the companion transceiver. This signal isnormally used by the system for the diagnostic purpose. The signal is operated in TTL level.
Pin Descriptions ASFP-1G-LX
| Pin | Signal Name | Description |
| 1 | TGND | Transmitter Ground |
| 2 | TX_FAULT | Transmit Fault |
| 3 | TX_DISABLE | Transmit Disable |
| 4 | MOD_DEF(2) | SDA Serial Data Signal |
| 5 | MOD_DEF(1) | SCL Serial Clock Signal |
| 6 | MOD_DEF(0) | TTL Low |
| 7 | RATE SELECT | Open Circuit |
| 8 | RX_LOS | Receiver Loss of Signal, TTL High, Open collector |
| 9 | RGND | Receiver Ground |
| 10 | RGND | Receiver Ground |
| 11 | RGND | Receiver Ground |
| 12 | RX- | Receive Data Bar, Differential PECL, ac coupled |
| 13 | RX+ | Receive Data, Differential PECL, ac coupled |
| 14 | RGND | Receiver Ground |
| 15 | VCCR | Receiver Power Supply |
| 16 | VCCT | Transmitter Power Supply |
| 17 | TGND | Transmitter Ground |
| 18 | TX+ | Transmit Data, Differential PCEL, ac coupled |
| 19 | TX- | Transmit Data Bar, Differential PCEL, ac coupled |
| 20 | TGND | Transmitter Ground |
Ordering Information ASFP-1G-LX
| Model Number | Part Number | Reach | Input/Out | Signal Detect | Voltage | Temperature |
| SFP-LX | OP6C-S10-13-C | 10km | AC/AC | TTL | 3.3V | 0°C to 70 °C |
| SFP-LX-I | OP6C-S10-13-I | 10km | AC/AC | TTL | 3.3V | -40°C to 85 °C |
