The BYCS-131X-10Dxx Series 10G SFP+ 1310nm LR 10km Transceiver V3.07 is a 10Gb/s SFP+ LR (Long Reach) optical transceiver with 1310nm DFB transmitter, PIN photodetector, and 10km SMF reach manufactured by F-tone Networks（北亿纤通）. The BYCS-131X-10Dxx series features 2 SKUs: BYCS-131X-10D (Commercial 0~70°C) and BYCS-131X-10DI (Industrial -40~85°C). 10Gb/s serial optical interface compliant to 802.3ae 10GBASE-LR. Electrical interface compliant to SFF-8431 specifications for enhanced 8.5 and 10 Gigabit SFP+. 1310nm DFB transmitter + PIN photo-detector. 2-wire interface compliant with SFF-8472 digital diagnostic monitoring (DDM) interface for optical transceivers with internal calibration mode. All-metal housing for superior EMI performance. Low power consumption <1000mW. Advanced firmware allows customer system encryption information to be stored in transceiver. RoHS compliant. Operating reach 10km@SMF. Tx power -8.2~0.5dBm (average) / -5.2dBm (OMA min) / -6.2dBm (OMA-TDP min). Rx sensitivity -14.4dBm (average) / -12.6dBm (OMA). Rx overload 0.5dBm. Extinction ratio 3.5dB. SMSR 30dB. TDP 3.2dB. 4 main applications: High-speed Storage Area Networks (SAN) + Computer Cluster Cross-connect + Custom High-speed Data Pipes + 10G Ethernet/Data Center/Telecom/Metro.
🔬 关键差异化亮点：F-tone 第二款”BYCS-131X” 10G SFP+ LR 1310nm 10km
🔄 F-tone BYCS-131X系列 10G SFP+产品线 2 SKU 对比
| 维度 | BYCS-13L1-15Dxx系列（ID 2215） | BYCS-131X-10Dxx系列（本篇 V3.07） |
|---|---|---|
| 波长 | 1310nm（推测） | 1310nm |
| 距离 | 15km 推测（”15D”） | 10km（”10D”） |
| 速率 | 10G SFP+ | 10G SFP+ |
| 标准 | 10GBASE-LR | 10GBASE-LR 802.3ae |
| 激光器 | DFB（推测） | DFB 1310nm |
| 探测器 | PIN（推测） | PIN |
| DDM | 支持 | 支持（SFF-8472 + 内部校准） |
| SKU 数量 | 2 SKU（商业级 + 工业级） | 2 SKU（商业级 + 工业级） |
| 温度范围 | 0~70°C / -40~85°C | 0~70°C / -40~85°C |
| 应用 | 10G LR 应用 | SAN + 集群互联 + 高速数据管道 + 10G以太网/数据中心/电信/城域网 |
1. 产品特性（Product Features）
- ✅ 10Gb/s serial optical interface compliant to 802.3ae 10GBASE-LR
- ✅ Electrical interface compliant to SFF-8431 specifications for enhanced 8.5 and 10 Gigabit small form factor pluggable module “SFP+”
- ✅ 1310nm DFB transmitter, PIN photo-detector
- ✅ 2-wire interface for management specifications compliant with SFF-8472 digital diagnostic monitoring interface for optical transceivers
- ✅ All-metal housing for superior EMI performance
- ✅ Low power consumption
- ✅ Advanced firmware allow customer system encryption information to be stored in transceiver
- ✅ Cost effective SFP+ solution, enables higher port densities and greater bandwidth
- ✅ RoHS compliant
2. 应用领域（Applications）
- 🔹 High-speed storage area networks — 高速存储区域网络（SAN）
- 🔹 Computer cluster cross-connect — 计算机集群交叉连接
- 🔹 Custom high-speed data pipes — 定制高速数据管道
- 🔹 10G Ethernet / Data Center / Telecom / Metro Network — 10G以太网/数据中心/电信/城域网
3. 产品描述（Description）
This 1310nm DFB 10Gigabit SFP+ transceiver is designed to transmit and receive optical data over single mode optical fiber for link length 10km. The SFP+ LR module electrical interface is compliant to SFI electrical specifications. The transmitter input and receiver output impedance is 100 Ohms differential. Data lines are internally AC coupled. The module provides differential termination and reduce differential to common mode conversion for quality signal termination and low EMI. SFI typically operates over 200 mm of improved FR4 material or up to about 150mm of standard FR4 with one connector.
The transmitter converts 10Gbit/s serial CML electrical data into serial optical data compliant with the 10GBASE-LR standard. An open collector compatible Transmit Disable (Tx_Dis) is provided. A logic “1,” or no connection on this pin will disable the laser from transmitting. A logic “0” on this pin provides normal operation. The transmitter has an internal automatic power control loop (APC) to ensure constant optical power output across supply voltage and temperature variations. An open collector compatible Transmit Fault (TFault) is provided.
The receiver converts 10Gbit/s serial optical data into serial PECL/CML electrical data. An open collector compatible Loss of Signal is provided. Rx_LOS when high indicates an optical signal level below that specified in the relevant standard.
4. 收发器框图（Transceiver Block Diagram）
5. 高速接口参考电路（High-Speed Interface Reference Circuit）
- RD±/TD± 高速差分线要求控制 100Ω 差分阻抗
- VCCR/VCCT 接收/发射供电引脚采用 LC 滤波电路：0.1μF（高频去耦）+ 4.7μH（滤波电感）+ 0.1μF（高频纹波）+ 22μF（低频纹波）
- VEER/VEET 直接接地（GND），为接收/发射侧提供地参考
- 主机 +3.3V 供电，单路滤波结构完整
6. PCB 控制接口连接原理图（PCB Control Interface Circuit）
- 共 5 个 10kΩ 上拉电阻：RS1、RS0、MOD-DEF0、SCL、SDA，统一连接到 +3.3V 电源
- VEER/VEET 直接接地（GND）
- SCL/SDA 采用 开漏驱动（Open Collector Driver），需外部上拉电阻输出高电平
- TX_DIS 同样采用开漏驱动
- RX_LOS/TX_FAULT 直连主机控制器（开漏输出）
7. SFP+ 金手指引脚定义（SFP+ Pin Definition）
7.1 SFP+ 20 引脚定义（SFP+ 20-Pin Definition）
| PIN | Logic | Symbol | Description | Notes |
|---|---|---|---|---|
| 1 | — | VeeT | Module Transmitter Ground | 1 |
| 2 | LVTTL-O | TX_Fault | Module Transmitter Fault | — |
| 3 | LVTTL-I | TX_Dis | Transmitter Disable; Turns off transmitter laser output | — |
| 4 | LVTTL-I/O | SDA | 2-Wire Serial Interface Data Line | 2 |
| 5 | LVTTL-I | SCL | 2-Wire Serial Interface Clock | 2 |
| 6 | — | MOD_DEF0 | Module Definition, Grounded in the module | — |
| 7 | LVTTL-I | RS0 | Receiver Rate Select | — |
| 8 | LVTTL-O | RX_LOS | Receiver Loss of Signal Indication Active LOW | — |
| 9 | LVTTL-I | RS1 | Transmitter Rate Select (not used) | — |
| 10 | — | VeeR | Module Receiver Ground | 1 |
| 11 | — | VeeR | Module Receiver Ground | 1 |
| 12 | CML-O | RD- | Receiver Inverted Data Output | — |
| 13 | CML-O | RD+ | Receiver Data Output (not used) | — |
| 14 | — | VeeR | Module Receiver Ground | 1 |
| 15 | — | VccR | Module Receiver 3.3 V Supply | — |
| 16 | — | VccT | Module Receiver 3.3 V Supply | — |
| 17 | — | VeeT | Module Transmitter Ground | 1 |
| 18 | CML-I | TD+ | Transmitter Non-Inverted Data Input | — |
| 19 | CML-I | TD- | Transmitter Inverted Data Input | — |
| 20 | — | VeeT | Module Transmitter Ground | 1 |
- 1️⃣ Module ground pins GND are isolated from the module case.（模块地引脚与模块外壳隔离）
- 2️⃣ Shall be pulled up with 4.7K-10Kohms to a voltage between 3.15V and 3.45V on the host board.（在主机板上需用 4.7K-10K 电阻上拉到 3.15V-3.45V 电压）
8. 机械尺寸（Mechanical Specifications）
8.1 机械尺寸关键参数（Mechanical Dimensions）
| 参数 | 值 | 公差 | 单位 |
|---|---|---|---|
| 光口宽度（光口端面） | 6.25 | ±0.05 | mm |
| 金手指端到第一定位点 | 36.95 | ±0.10 | mm |
| 金手指端到第二定位点 | 41.80 | ±0.10 | mm |
| 金手指端到光口座根部 | 45.00 | ±0.10 | mm |
| 光口座公差 | 0.50 | ±0.05 | mm |
| 模块主体厚度 | 8.50 | ±0.10 | mm |
| 拉环段高度 | 10.82 / 12.32 | — | mm |
| 上壳平面段长度 | 31.00 | — | mm |
| 不含拉环总长度 | 47.65 | — | mm |
| 含拉环总长度 | 56.70 | — | mm |
| 模块主体宽度 | 13.70 | ±0.10 | mm |
| 拉环端宽度 | 13.90 | ±0.10 | mm |
| 上壳内凹宽度 | 10.00 | — | mm |
9. 性能规格（Product Specifications）
9.1 绝对最大额定值（Absolute Maximum Ratings）
| 参数/Parameter | 符号/Symbol | Min | Max | 单位/Units |
|---|---|---|---|---|
| Power Supply Voltage | Vcc | 0 | 3.6 | V |
| Storage Temperature | Tc | -40 | 85 | °C |
| Operating Case Temperature | Tc | 0 | 70 | °C |
| Operating Case Temperature (Industrial) | TI | -40 | 85 | °C |
| Relative Humidity | RH | 5 | 95 | % |
| RX Input Average Power | Pmax | — | 0 | dBm |
9.2 推荐工作条件（Recommended Operating Conditions）
| 参数/Parameter | 符号/Symbol | Min | Typ | Max | 单位/Units |
|---|---|---|---|---|---|
| Power Supply Voltage | Vcc | 3.135 | 3.3 | 3.465 | V |
| Power Supply Current | Icc | — | — | 350 | mA |
| Operating Case Temperature (Commercial) | TC | 0 | 25 | 70 | °C |
| Operating Case Temperature (Industrial) | TC | -40 | 25 | 85 | °C |
9.3 光学特性（Optical Characteristics）
| 参数/Parameters | 单位/Unit | 值/Values |
|---|---|---|
| Operating Reach | m | 10K |
| Transmitter 发射端 | ||
| Center wavelength (range) | nm | 1260 -1355 |
| Side Mode Suppression Ratio (min) | dB | 30 |
| Launched power (Average) max | dBm | 0.5 |
| Launched power (Average) min | dBm | -8.2 |
| Launched power OMA (min) | dBm | -5.2 |
| Launched power OMA-TDP (min) | dBm | -6.2 |
| Transmitter and dispersion penalty (max) | dB | 3.2 |
| Average launch power of OFF transmitter (max) | dBm | -30 |
| Extinction ratio (min) | dB | 3.5 |
| RIN12 OMA (max) | dB/Hz | -128 |
| Optical Return Loss Tolerance (min) | dB | 12 |
| Receiver 接收端 | ||
| Center wavelength (range) | nm | 1260-1620 |
| Receive overload (max) in average power | dBm | 0.5 |
| Receive sensitivity (min) in average power | dBm | -14.4 |
| Receiver sensitivity (max) in OMA | dBm | -12.6 |
| Receiver Reflectance (max) | dB | -12 |
| Stressed receiver sensitivity (max) in OMA | dBm | -10.3 |
| Vertical eye closure penalty (min) | dB | 2.2 |
| Los Assert (min) | dBm | -30 |
| Los Dessert (max) | dBm | -12 |
| Los Hysteresis (min) | dB | 0.5 |
| Stressed eye jitter (min) | UIp-p | 0.3 |
| Receive electrical 3dB upper cutoff frequency (max) | GHz | 12.3 |
| Receiver power (damage, Max) | dBm | 1.5 |
9.4 数字诊断功能（Digital Diagnostic Functions）
| 参数/Parameter | 符号/Symbol | Min | Max | 单位/Unit | 备注/Notes |
|---|---|---|---|---|---|
| Temperature monitor absolute error | DMI_Temp | -3 | 3 | °C | Over operating temp |
| Laser power monitor absolute error | DMI_TX | -3 | 3 | dB | — |
| RX power monitor absolute error | DMI_RX | -3 | 3 | dB | -1dBm to -15dBm range |
| Supply voltage monitor absolute error | DMI_VCC | -0.08 | 0.08 | V | Full operating range |
| Bias current monitor | DMI_Ibias | -10% | 10% | mA | — |
- 本模块符合 SFF-8472 Rev10.2 with internal calibration mode（SFF-8472 修订版 10.2 + 内部校准模式）
- 数字诊断特性在推荐工作环境范围内定义，除非另有说明
9.5 电气特性（Electrical Characteristics）
| 参数/Parameter | 符号/Symbol | Min | Typ | Max | 单位/Unit | 备注/Notes |
|---|---|---|---|---|---|---|
| Data Rate | — | — | 10.3125 | — | Gbps | — |
| Power Consumption | — | — | 800 | 1000 | mW | — |
| Transmitter 发射端 | ||||||
| Single Ended Output Voltage Tolerance | — | -0.3 | — | 4 | V | — |
| C common mode voltage tolerance | — | 15 | — | — | mV | — |
| Tx Input Diff Voltage | VI | 180 | — | 800 | mV | — |
| Tx Fault | VoL | -0.3 | — | 0.4 | V | At 0.7mA |
| Data Dependent Input Jitter | DDJ | — | — | 0.1 | UI | — |
| Data Input Total Jitter | TJ | — | — | 0.28 | UI | — |
| Receiver 接收端 | ||||||
| Single Ended Output Voltage Tolerance | — | -0.3 | — | 4 | V | — |
| Rx Output Diff Voltage | Vo | 300 | — | 850 | mV | — |
| Rx Output Rise and Fall Time | Tr/Tf | 30 | — | — | ps | 20% to 80% |
| Total Jitter | TJ | — | — | 0.7 | UI | — |
| Deterministic Jitter | DJ | — | — | 0.42 | UI | — |
9.6 控制与状态 I/O 时序特性（Control and Status I/O Timing Characteristics）
| 参数/Parameter | 符号/Symbol | Min | Max | 单位/Unit | 条件/Condition |
|---|---|---|---|---|---|
| TX Disable Assert Time | t_off | — | 10 | μs | Time from rising edge of TX Disable to when the optical output falls below 10% of nominal |
| TX Disable Negate Time | t_on | — | 1 | ms | Time from falling edge of TX Disable to when the modulated optical output rises above 90% of nominal |
| Time to initialize, including reset of TX_Fault | t_init | — | 300 | ms | From power on or negation of TX Fault using TX Disable |
| TX Fault Assert Time | t_fault | — | 100 | μs | Time from fault to TX fault on |
| TX Disable to reset | t_reset | 10 | — | μs | Time TX Disable must be held high to reset TX fault |
| LOS Assert Time | t_loss_on | — | 100 | μs | Time from LoS state to RX LOS assert |
| LOS Deassert Time | t_loss_off | — | 100 | μs | Time from non-LOS state to RX LOS deassert |
| Rate-Select Change Time | t_ratesel | — | 10 | μs | Time from rising or falling edge of Rate Select input until receiver bandwidth is in conformance with appropriate specification |
| Serial ID Clock Rate | t_serial_clock | — | 100 | kHz | — |
10. ESD 与激光安全（ESD & Laser Safety）
10.1 ESD 静电防护（ESD Protection）
本收发器 ESD 阈值 2kV for all electrical input pins，测试标准 MIL-STD-883, Method 3015.4 / JESD22-A114-A (HBM)。但是在处理此模块时仍需采取正常的 ESD 防护措施。本收发器采用 ESD 防护包装运输。只能在 ESD 防护环境中从包装中取出并处理。
10.2 激光安全（Laser Safety）
本产品为 Class 1 Laser Product according to IEC 60825-1:1993:+A1:1997+A2:2001。本产品符合 21 CFR 1040.10 and 1040.11，但根据 2001 年 7 月 26 日发布的 Laser Notice No. 50 规定有一些偏差。
11. 订购信息（Ordering Information）
| 型号/Model | 规格描述/Specification Description |
|---|---|
| BYCS-131X-10D | SFP+ DUAL, 1310nm, 10.3125G, 10km, With DDM, 0 ~ 70℃ |
| BYCS-131X-10DI | SFP+ DUAL, 1310nm, 10.3125G, 10km, With DDM, -40 ~ 85℃ |
- BYCS — F-tone 10G SFP+ 系列前缀
- 131X — 1310nm + X 系列
- 10D — 10km DUAL 速率
- xx — 温度等级（D=Commercial 商业级 0~70°C，DI=Industrial 工业级 -40~85°C）
12. 注意事项及维护（Precautions & Maintenance）
- 🔸 光连接器清洁：使用前请用专业清洁工具清洁 LC 双工光纤端面，不使用时请带好防尘帽
- 🔸 ESD 防护：本模块 ESD 阈值 2kV（HBM），处理模块时请佩戴 ESD 防护设备
- 🔸 最大输入光功率：接收端最大输入平均光功率 0dBm，损伤阈值 1.5dBm
- 🔸 温度范围：工作温度 0~70°C（商业级）/ -40~85°C（工业级），储存温度 -40~85°C
- 🔸 相对湿度：5% ~ 95%
- 🔸 电源要求：单 3.3V 供电，电压范围 3.135V~3.465V，电流 ≤ 350mA
- 🔸 TX Disable 控制：TX Disable 高电平或悬空 = 激光器关闭，低电平 = 正常发射
- 🔸 TX Fault 指示：TX Fault 高电平 = 发射链路异常
- 🔸 RX_LOS 指示：RX_LOS 高电平 = 接收光功率低于告警阈值
- 🔸 DDM 实时监控：温度 ±3°C / Tx 功率 ±3dB / Rx 功率 ±3dB / Vcc ±0.08V / 偏置电流 ±10%
- 🔸 机械合规：符合 SFF-8432 rev. 5.0 改进的可插拔外形规格
- 🔸 激光安全：Class 1 激光产品，符合 IEC 60825-1:1993+A1+A2 及 21 CFR 1040.10/11
🌐 F-tone Networks 北亿纤通 — Company Information
Company Name（公司名）：北亿纤通科技有限公司 | F-tone Networks
Region（地区）：China Sichuan Chengdu High-tech Industrial Park（中国四川成都高新区高新工业园）
Service Area（服务区域）：Global（全球）
Tel（企业电话）：+86-28-85255257-812
Fax（企业传真）：+86-28-85977702
Add（地址）：A-1 building, High tech Industrial Park, Chengdu, Sichuan, China
Web（网站）：http://www.f-tone.com
Email（邮箱）：sales@f-tone.com
Important Notice 重要通知
Performance figures, data and any illustrative material provided in this data sheet are typical and must be specifically confirmed in writing by F-tone Networks before they become applicable to any particular order or contract. In accordance with the F-tone Networks policy of continuous improvement specifications may change without notice.
The publication of information in this data sheet does not imply freedom from patent or other protective rights of F-tone Networks or others. Further details are available from any F-tone Networks sales representative.
