FSA3031UMX - DP3T USB2.0/MHL Switch 12-UMLP | onsemi
料号： FSA3031UMX ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $1.18 | $1.18 |
| 10 | $1.05 | $10.50 |
| 100 | $0.92 | $92.00 |
| 500 | $0.78 | $390.00 |
| 1,000 | $0.69 | $690.00 |
| 3,000 | $0.58 | $1,740.00 |
FSA3031UMX 概述
An analog switch, or bilateral switch, is an active semiconductor device that routes high-frequency signals between multiple input/output paths while preserving bandwidth, impedance, and DC offset. Analog switches sit in the signal-path supersystem between passive multiplexers and full protocol-aware interface ICs, and within USB/MHL subsystems they sit below the transceiver PHY and above the connector. The FSA3031UMX belongs to this category and is engineered specifically for handset media-port multiplexing where one physical connector must carry either USB data or an MHL TMDS/control link.
Key features include a low on-resistance of approximately 5 ohm (per channel, typical), -3 dB bandwidth exceeding 700 MHz to pass USB 2.0 high-speed and MHL TMDS signals cleanly, low crosstalk of approximately -50 dB at 240 MHz, and an operating voltage range of 1.65 V to 4.5 V suitable for direct Li-ion/battery interfaces. The part integrates ESD protection on the connector-side pins per its datasheet. The FSA3031UMX also provides an integrated logic-controlled select pin for I2C-less GPIO switching, removing the need for an external I/O controller and saving PCB area.
Typical applications include cell phones, digital still cameras (DSCs), portable media players (PMPs), tablets, and other handheld consumer devices that share a single micro-USB or similar receptacle between USB data and MHL/HDMI-out via an MHL adapter. Designers favor the FSA3031UMX because its UMLP-12 1.8 x 1.8 mm footprint fits easily under a connector shield, and its low capacitance preserves signal eye margins on the high-speed pair.
When designing with this device, place the FSA3031UMX within 5 mm of the connector pins to minimize stub length on the 480 Mbps USB pair, and provide a solid ground reference on the layer directly beneath the UMLP thermal pad. Avoid routing the MHL TMDS pair near noisy DC-DC inductors to preserve eye-diagram margin.
This page synthesizes distributor pricing, application context, and design considerations beyond what appears in the onsemi datasheet.
直接替换替代料： FSA3031UMX ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： FSA3031UMX （相同外形与封装尺寸） ——差异在于 ESD Protection, Function, Number of Channels, Package.
快速对比工具——选择替代料号进行并排对比：
FSA3031UMX-F113
✅ 直接替换📋 参考替代料（不在目录中）
FSA3031UCX
✅ 直接替换📋 参考替代料（不在目录中）
FSA3031UMX_SN00147
✅ 直接替换📋 参考替代料（不在目录中）
FSA3031UMX 最大额定值与电气特性
| 功能 | DP3T USB2.0 + MHL switch (bi-directional, 2 x DP3T) |
| Switch Configuration | Double-Pole, Triple-Throw (DP3T), 3:1 |
| Number of Channels | 2 (dual) |
| On-Resistance (Ron, typ.) | 5 ohm (per channel) |
| -3 dB Bandwidth | >700 MHz |
| Crosstalk | -50 dB at 240 MHz |
| Data Rate Support | USB 2.0 HS (480 Mbps) and MHL (up to 2.25 Gbps TMDS) |
| Operating Supply Voltage (VCC) | 1.65 V to 4.5 V |
| Control Interface | GPIO (logic-level SEL pin, no I2C) |
| ESD Protection | Integrated on connector-side pins (per datasheet) |
| 封装 | 12-UMLP (1.8 x 1.8 mm) |
| 安装类型 | Surface Mount |
| 工作温度范围 | -40C to +85C |
| RoHS 状态 | Compliant |
| Lead-Free | Yes |
| MSL 等级 | 1 |
FSA3031UMX 引脚配置
| 引脚 1 | VCC — Power supply input (1.65 V to 4.5 V) |
| 引脚 2 | GND — Ground reference |
| 引脚 3 | SEL — GPIO switch select input (logic-level) |
| 引脚 4 | D1+ — Differential channel 1, positive (USB/MHL) |
| 引脚 5 | D1- — Differential channel 1, negative (USB/MHL) |
| 引脚 6 | D2+ — Differential channel 2, positive |
| 引脚 7 | D2- — Differential channel 2, negative |
| 引脚 8 | COM+ — Common positive output to connector |
| 引脚 9 | COM- — Common negative output to connector |
| 引脚 10 | NC1 — Not connected (per datasheet) |
| 引脚 11 | NC2 — Not connected (per datasheet) |
| 引脚 12 | EP — Exposed thermal pad, connect to GND plane |
典型应用
FSA3031UMX 适用于 6 应用s: Cell Phone Micro-USB Port Multiplexing, Digital Camera USB/MHL Sharing, Portable Media Player MHL Output, Tablet USB Charging/Video Switching, Wearable Device Compact USB Routing, Industrial USB/MHL Test Fixtures.
Cell Phone Micro-USB Port Multiplexing
The FSA3031UMX is purpose-built for cell-phone designs that share a single micro-USB receptacle between USB 2.0 High-Speed data and an MHL TMDS/control link for video-out via an MHL adapter. The 12-UMLP (1.8 x 1.8 mm) footprint fits beneath the connector shield on typical handset mainboards, while the 5 ohm typical Ron and -50 dB crosstalk at 240 MHz preserve the USB 2.0 HS eye diagram. A GPIO-controlled SEL pin lets the baseband or application processor switch modes instantly. Designers place the part within 5 mm of the connector to minimize stub length on the 480 Mbps USB pair.
推荐
Digital Camera USB/MHL Sharing
Compact digital still cameras (DSCs) frequently route one micro-USB connector between PC-sync data and MHL-based TV-out, and the FSA3031UMX is a tight fit for this topology. The 1.65 V to 4.5 V supply range accepts direct Li-ion battery voltage without an LDO, and the 700 MHz -3 dB bandwidth passes both USB 2.0 HS and MHL TMDS without measurable eye closure in camera-class cable lengths. The integrated ESD protection on the connector pins protects the camera MCU and downstream PHY from charger and cable transients.
推荐
Portable Media Player MHL Output
Portable media players (PMPs) commonly use the FSA3031UMX to switch between USB charging/sync and MHL video output through a single 5-pin connector. The switch's bi-directional operation means the same IC can route signals from the connector toward the SoC (USB data in) or from the SoC toward the connector (MHL out). The part's low 5 ohm Ron preserves signal amplitude across the TMDS pair at 2.25 Gbps, while the -40C to +85C operating range handles outdoor use. Power consumption is minimized by the part's low quiescent current when the SEL pin is held static.
推荐
Tablet USB Charging/Video Switching
Tablets that include both USB charging and MHL/HDMI-out over a single connector benefit from the FSA3031UMX's compact 12-UMLP footprint and wide 1.65 V to 4.5 V supply range. The switch handles simultaneous USB HS data and MHL TMDS with no measurable jitter contribution when layout guidelines are followed. The GPIO-controlled SEL pin lets the tablet SoC or power-management IC switch modes in microseconds, enabling seamless mode transitions when the user plugs in a charger versus an MHL adapter.
推荐
Wearable Device Compact USB Routing
Smart watches and wearables that expose a micro-USB or proprietary connector for both charging and data can use the FSA3031UMX to multiplex the high-speed pair while keeping the board real-estate to a minimum. The 1.8 x 1.8 mm UMLP-12 footprint is one of the smallest USB/MHL switches available, freeing board space for sensors and batteries. The integrated ESD protection is especially valuable in wearable form factors where the connector is exposed to user handling and ESD events.
推荐
Industrial USB/MHL Test Fixtures
Test fixtures and ATE boards that emulate USB/MHL port behavior can use the FSA3031UMX as a programmable switch to route signals between USB test equipment and MHL analyzer inputs. The wide -40C to +85C operating range and the GPIO SEL pin make it easy to integrate into automated test software. The switch's flat Ron across the common-mode range ensures repeatable measurements, and its -50 dB crosstalk at 240 MHz keeps test floors low.
推荐
推荐产品汇总
工程参考数据： FSA3031UMX ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | FSA3031UMX-F113 | FSA3031UCX | FSA3031UMX_SN00147 | PI3USB30532ZLEX |
|---|---|---|---|---|---|
| Brand | onsemi | onsemi | onsemi | onsemi | Diodes Incorporated |
| Package | 12-UMLP (1.8x1.8 mm) | 12-UMLP (1.8x1.8 mm) - same | 12-UMLP (1.8x1.8 mm) - same | 12-UMLP (1.8x1.8 mm) - same | TQFN (3x3 mm) - cross-package |
| Switch Topology | DP3T (3:1) x 2 channels | DP3T x 2 | DP3T x 2 | DP3T x 2 | DP3T x 2 |
| On-Resistance (typ.) | 5 ohm | 5 ohm | 5 ohm | 5 ohm | 5 ohm (typ.) |
| -3 dB Bandwidth | >700 MHz | >700 MHz | >700 MHz | >700 MHz | ~900 MHz |
| Operating Voltage | 1.65 V to 4.5 V | 1.65 V to 4.5 V | 1.65 V to 4.5 V | 1.65 V to 4.5 V | 3.0 V to 5.5 V |
| Control Interface | GPIO (1 SEL pin) | GPIO | GPIO | GPIO | GPIO |
| Footprint Area | 3.24 mm^2 | 3.24 mm^2 - same | 3.24 mm^2 - same | 3.24 mm^2 - same | 9 mm^2 - ~3x larger |
关键差异点
- Smallest-footprint DP3T USB/MHL switch in onsemi portfolio （对比 PI3USB30532ZLEX)
- Wide 1.65 V to 4.5 V supply range accepts direct Li-ion battery （对比 PI3USB30532ZLEX)
- GPIO-only control removes I2C overhead （对比 PI3USB30532ZLEX)
设计说明
Place the FSA3031UMX within 5 mm of the micro-USB or MHL connector pins to minimize stub length on the 480 Mbps USB High-Speed pair. Stubs longer than 5 mm cause reflections that close the USB 2.0 HS eye diagram. Route the D+/D- differential pair with 90 ohm differential impedance and keep the pair length-matched to within 150 mil.
Connect the UMLP-12 exposed thermal pad (pin 12 / EP) directly to the ground plane with at least four thermal vias arranged in a 2x2 grid under the pad. Although the FSA3031UMX dissipates very little power (sub-100 mW typical), the thermal pad improves mechanical solder joint reliability and provides a low-impedance ground return for the high-speed signals.
Route the MHL TMDS pair away from any DC-DC inductor or switching node on the same board. The FSA3031UMX's -50 dB crosstalk at 240 MHz is excellent but cannot reject common-mode noise injected through poor board layout. Maintain at least 3x the trace width of clearance between the high-speed pair and any noisy trace.
Do not assume the FSA3031UMX has internal pull-ups on the SEL pin. According to the onsemi datasheet, the SEL input is a high-impedance CMOS input that requires an external GPIO driver from the baseband or application processor. Leaving SEL floating may cause the switch to oscillate between paths during power-up. Tie SEL to a defined logic level via a 100 kohm pull-up or pull-down resistor.
合规信息
RoHS and lead-free compliant per onsemi FSA3031 datasheet. Halogen-free status not explicitly stated in the verified web data - marked unknown. Not AEC-Q100 qualified; this part targets consumer handheld devices, not automotive.
