TS3A27518ERTWR - 6-Ch 2:1 Analog Mux, 240MHz | Texas Instruments
料号： TS3A27518ERTWR ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $1.35 | $1.35 |
| 10 | $1.21 | $12.10 |
| 100 | $1.02 | $102.00 |
| 500 | $0.87 | $435.00 |
| 1,000 | $0.72 | $720.00 |
| 3,000 | $0.65 | $1,950.00 |
TS3A27518ERTWR 概述
An analog multiplexer is a signal-routing semiconductor that selects one of several input channels and connects it to a common output, functioning as a digitally controlled switch for both analog and digital signals. Within the signal-chain hierarchy, it sits between passive switches and full crosspoint matrices, and belongs to the broader family of interface and analog switch ICs used in power management and signal conditioning subsystems.
Key features include low 6.2 ohm typical on-resistance for minimal signal attenuation, 21.5 pF typical switch capacitance, up to 240 MHz bandwidth for high-speed rail-to-rail signal handling, and -62 dB crosstalk and OFF isolation. The device also provides isolation in power-down mode (VCC = 0 V), and 1.8 V logic-threshold-compatible control inputs that allow direct interfacing with low-voltage microcontrollers.
Architecturally, the TS3A27518E uses two control pins, each simultaneously controlling three 1:2 multiplexer sections, plus an enable pin that places all outputs in high-impedance mode. Integrated ESD cells rated to IEC 61000-4-2 on the signal pins eliminate the need for external TVS diodes in USB and port-protection designs, and the device is qualified for automotive applications.
Typical applications include USB 2.0 high-speed signal switching, audio jack and headset detection, battery-powered portable equipment, and general-purpose analog signal routing in industrial systems.
A key design consideration is on-resistance flatness across the signal range: at lower VCC the Ron rises, so budget for insertion loss at 1.65 V operation, and keep stub lengths short to preserve the 240 MHz bandwidth.
This page adds value beyond the datasheet by synthesizing distributor pricing tiers, drop-in alternatives, cross-reference data, and practical design notes in one reference.
直接替换替代料： TS3A27518ERTWR ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
快速对比工具——选择替代料号进行并排对比：
TS3A27518ERTWR-Q1
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
TS3A27518ERTWR 规格参数
| 功能 | 6-channel 1:2 (SPDT) multiplexer/demultiplexer |
| Supply Voltage Range | 1.65 V to 3.6 V |
| On-Resistance (typ) | 6.2 ohm |
| Bandwidth | 240 MHz |
| On-Capacitance (typ) | 21.5 pF |
| Crosstalk | -62 dB |
| OFF Isolation | -62 dB |
| Control Input Logic Compatibility | 1.8 V logic threshold |
| Control Pins | 2 (each controls three 1:2 muxes) + enable |
| Power-Down Isolation | Yes (VCC = 0 V) |
| ESD Protection | IEC 61000-4-2 integrated ESD protection |
| Signal Range | Rail-to-rail, 0 V to VCC |
| 封装 | 24-WQFN (4x4 mm) |
| 安装类型 | Surface Mount |
| Automotive Qualification | Qualified for automotive applications |
| RoHS 状态 | Compliant |
TS3A27518ERTWR 24-wqfn (4x4 mm) 引脚配置指南
TS3A27518ERTWR（24-wqfn (4x4 mm) 封装）的引脚配置。 引脚编号、功能和连接图在制造商数据手册中定义。请参阅该手册以了解确切的封装尺寸和焊接指南。
暂无详细引脚数据： TS3A27518ERTWR.
请参阅 数据手册 以查看完整引脚配置。
典型应用
TS3A27518ERTWR 适用于 6 应用s: USB 2.0 High-Speed Signal Switching, Audio Jack and Headset Detection, Battery-Powered Portable Equipment, Industrial Analog Signal Routing, Automotive Body Electronics and Infotainment, Test and Measurement Instrumentation.
USB 2.0 High-Speed Signal Switching
The TS3A27518ERTWR routes USB 2.0 high-speed (480 Mbps) differential pairs with 240 MHz bandwidth and 21.5 pF typical on-capacitance, keeping eye diagrams open at full data rate. Its 6.2 ohm on-resistance contributes minimal insertion loss, while -62 dB OFF isolation prevents coupling into unused ports. Integrated IEC 61000-4-2 ESD protection on signal pins removes external TVS diodes that would otherwise add capacitance, and power-down isolation (VCC = 0 V) prevents phantom powering of an unpowered host or peripheral. The two control pins each switch three 1:2 sections in lockstep, so D+/D- pairs of multiple ports are switched simultaneously without skew.
推荐
Audio Jack and Headset Detection
In portable audio designs, the TS3A27518ERTWR switches headset microphone, speaker, and detection lines between jack and codec sides. The 6.2 ohm on-resistance adds negligible attenuation to speaker and microphone paths, and the -62 dB crosstalk keeps muted channels silent. Power-down isolation ensures the codec side stays fully disconnected when the system is off, preventing battery drain through a plugged-in headset. The 1.8 V logic-compatible control inputs interface directly with low-voltage codec GPIOs without level shifting, and the 1.65 V minimum supply suits single-cell Li-ion rail architectures typical of earbuds and dongles.
推荐
Battery-Powered Portable Equipment
Battery-operated devices benefit from the TS3A27518ERTWR supply range of 1.65 V to 3.6 V, which covers lithium-ion cell voltage rails and regulated 1.8 V/3.3 V domains. The low 21.5 pF switch capacitance and small 24-WQFN (4x4 mm) footprint conserve board space in wearables and handheld instruments. Isolation at VCC = 0 V allows subsystems to be fully depowered in standby, protecting battery life. Control inputs accept 1.8 V logic directly from power-optimized microcontrollers, eliminating level translators, and the enable pin places all six channels into high impedance for further quiescent-current reduction.
推荐
Industrial Analog Signal Routing
In factory automation and data-acquisition nodes, the TS3A27518ERTWR steers sensor outputs between ADC inputs and diagnostic circuits. Rail-to-rail signal handling up to VCC accommodates 0-3.3 V sensor outputs, and the 6.2 ohm on-resistance keeps loading on high-impedance sensor outputs minimal. The -62 dB OFF isolation ensures de-selected channels do not corrupt active measurements, and automotive qualification supports installations near motors and switching loads. Designers should note that Ron rises at 1.65 V supply, so systems with high source impedance should run the mux from a 3.3 V rail to preserve measurement accuracy across temperature.
推荐
Automotive Body Electronics and Infotainment
Because the TS3A27518ERTWR is qualified for automotive applications, it fits infotainment jack switching, accessory-detect inputs, and body-control signal routing. The integrated IEC 61000-4-2 ESD protection withstands human-body discharge events at user-accessible connectors, reducing external component count in harsh 12 V-vehicle front ends. Its 1.65 V to 3.6 V supply integrates cleanly with 3.3 V infotainment SoC rails, and 1.8 V logic control compatibility eases interfacing with automotive MCUs. The Q1 variant should be specified for production automotive builds; the standard ERTWR suits prototyping and non-QM platforms.
推荐
Test and Measurement Instrumentation
Bench and portable instruments use the TS3A27518ERTWR to multiplex six signal pairs into a shared measurement front end. The 240 MHz bandwidth supports oscilloscope-probe and logic-analyzer channel routing well beyond audio frequencies, and matched Ron across channels preserves amplitude accuracy between inputs. The enable pin's high-impedance state lets a disconnected instrument present minimal loading to a device under test, and power-down isolation protects the instrument input when unpowered. Keep traces short and maintain controlled impedance around the mux to realize the full bandwidth in the final layout.
推荐
推荐产品汇总
工程参考数据： TS3A27518ERTWR ——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 | TS3A27518ERTWR-Q1 | TS3A27518EPWR |
|---|---|---|---|
| Package | 24-WQFN (4x4 mm) | 24-WQFN (4x4 mm) - same | TSSOP-24 - different footprint |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments |
| Supply Voltage | 1.65 V to 3.6 V | 1.65 V to 3.6 V | 1.65 V to 3.6 V |
| On-Resistance (typ) | 6.2 ohm | 6.2 ohm | 6.2 ohm |
| Bandwidth | 240 MHz | 240 MHz | 240 MHz |
| ESD Protection | IEC 61000-4-2 integrated | IEC 61000-4-2 integrated | IEC 61000-4-2 integrated |
| Power-Down Isolation | Yes (VCC = 0 V) | Yes | Yes |
| Automotive Qualification | Qualified for automotive | Yes (AEC-Q100 grade) | No |
关键差异点
- Integrated IEC 61000-4-2 ESD protection on signal pins （对比 TS3A5018PW)
- 240 MHz bandwidth with only 21.5 pF on-capacitance （对比 TS3A225ERTER)
- Power-down isolation at VCC = 0 V （对比 Generic analog muxes without fail-safe switching)
设计说明
To realize the 240 MHz bandwidth, route USB D+/D- or other high-speed pairs as 90-ohm differential traces with length matching within 5 mil, and place the TS3A27518ERTWR within a few millimeters of the connector. The 21.5 pF typical on-capacitance plus trace stub forms a low-pass filter - avoid long unterminated stubs on the NC port, which cause reflections at high speed. Per TI datasheet application guidance, a series common-mode choke after the mux can further suppress radiated emissions in USB designs.
Power VCC from a clean 1.65 V to 3.6 V rail with a 0.1 uF ceramic decoupling capacitor placed within 2 mm of the VCC pin. Remember that on-resistance rises as VCC approaches 1.65 V - a design needing minimum insertion loss should use a 3.3 V rail. The enable pin should be actively driven (not floated) so all six channels enter defined high-impedance during power sequencing; power-down isolation guarantees the switch is off only when VCC is truly 0 V.
Never apply signals above VCC while the device is powered - signal range is 0 V to VCC rail-to-rail only; exceeding it forward-biases the ESD structure. The IEC 61000-4-2 rating protects against ESD strikes, not sustained overvoltage, so do not substitute it for a TVS in hot-plug short-circuit scenarios. Also, when replacing the WQFN with the TSSOP-24 variant, verify the land pattern differs - the packages are not footprint-interchangeable.
合规信息
Datasheet states 'Qualified for Automotive' (Q1 family). RoHS/lead-free status inferred from TI standard product offering for this package; REACH and halogen status not stated in provided data.
