MAX4855ETE+T - Dual SPDT Audio Switch | Maxim Integrated
料号： MAX4855ETE+T ✓ 量产中MAX4855ETE+T 概述
An analog switch is a semiconductor device that routes electrical signals between circuit nodes under digital control. The MAX4855 belongs to the analog switch hierarchy, within interface ICs and multiplexers. Its single-pole, double-throw configuration allows each of two channels to select between two signal paths. Integrated comparators add decision functions, making the device useful when a system must both route an audio signal and evaluate the selected path.
The MAX4855ETE+T provides two independently controlled SPDT switches, 0.75 ohm on-resistance, and operation from 2 V to 5.5 V. Rail-to-rail signal handling permits signals to approach the supply rails, while the extended operating temperature range of -40°C to +85°C supports industrial, communications, portable-device, and audio-routing environments. Lead-free construction and RoHS compliance are identified for the MAX4855ETE+T ordering variant.
The TQFN-16 package provides a space-saving implementation for compact audio paths. Its exposed thermal pad conducts heat away from the device and generally requires a properly designed PCB thermal plane. The low on-resistance helps reduce signal attenuation when routing audio signals, although total channel performance also depends on switch capacitance, off-state leakage, source impedance, load impedance, and the surrounding analog layout.
Typical uses include audio-signal routing in cellular phones, notebook computers, personal digital assistants, and other handheld equipment. The device is also suited to speaker and headset switching, where two channels can select between audio sources while integrated comparison functions assist signal-path control. Low-voltage operation makes it appropriate for systems using 2 V, 2.5 V, 3 V, 3.3 V, or 5 V rails.
For a new layout, place the MAX4855ETE+T near the connected audio nodes to minimize trace resistance and susceptibility to interference. Use a continuous ground plane, connect the exposed pad to ground using the manufacturer land pattern, and avoid routing high-current or switching signals beneath the analog input and output pins. Verify the control logic, comparator polarity, and signal levels before finalizing the application.
This product page combines manufacturer specifications, package details, sourcing guidance, and application-oriented engineering notes. It also identifies the verified same-package option and clearly distinguishes the MAX4855ETE+T tape-and-reel order variant from MAX4855ETE+ so engineers can select the correct ordering code without changing the PCB footprint.
直接替换替代料： MAX4855ETE+T ——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： MAX4855ETE+T （相同外形与封装尺寸） ——差异在于 On-Resistance, Package.
MAX4855ETE+
✅ 直接替换联系询价
查看数据手册 →MAX4855ETE+T 最大额定值与电气特性
| Switch Type | Dual SPDT analog switch |
| Number of Channels | 2 channels |
| On-Resistance | 0.75 ohm |
| Supply Voltage Range | 2 V to 5.5 V |
| Signal Handling | Rail-to-rail |
| Integrated Functions | Integrated comparators |
| 封装 | 16-pin TQFN with exposed pad |
| Package Dimensions | 3 mm x 3 mm |
| Package Height | 0.8 mm |
| 工作温度范围 | -40°C to +85°C |
| 安装类型 | Surface mount |
| Order Code | MAX4855ETE+T |
| Shipping Format | Tape and reel |
| Lead-Free Status | Lead free |
| RoHS 状态 | RoHS compliant |
MAX4855ETE+T 0.8 mm 引脚配置指南
MAX4855ETE+T（0.8 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： MAX4855ETE+T.
请参阅 数据手册 以查看完整引脚配置。
典型应用
MAX4855ETE+T 适用于 6 应用s: Cell Phone Audio Routing, Notebook Computer Audio Switching, Speaker and Headset Switching, Handheld Device Signal Selection, Portable Audio Codec Interface, Low-Voltage Audio Test and Control.
Cell Phone Audio Routing
MAX4855ETE+T fits low-voltage cell-phone audio paths because it combines two SPDT channels, 0.75 ohm on-resistance, and operation from 2 V to 5.5 V in a 3 mm x 3 mm TQFN-16 package. Rail-to-rail handling supports audio nodes operating close to the supply rails. The device can route a signal between two sources while its integrated comparators assist level or selection decisions. Keep traces short, provide a solid ground reference, and connect the exposed pad to the thermal plane to limit insertion loss and maintain stable behavior in a compact handset PCB.
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Notebook Computer Audio Switching
MAX4855ETE+T is appropriate for notebook audio routing where multiple sound paths must share limited board area. Its dual SPDT configuration can select between audio sources, while 0.75 ohm on-resistance helps minimize loss through the selected path. The 2 V to 5.5 V operating range supports several embedded and portable supply systems, and rail-to-rail handling supports low-voltage audio signals. Placement near the codec, speaker, and headset connections reduces trace length, while careful ground-plane continuity keeps return paths short and reduces coupling into sensitive audio nodes.
推荐
Speaker and Headset Switching
MAX4855ETE+T suits speaker-headset switching because two SPDT channels provide compact signal-path selection without a larger mechanical switch. The 0.75 ohm on-resistance limits resistive attenuation in the selected route, and the 3 mm x 3 mm TQFN footprint supports dense portable layouts. Integrated comparators can support mute, detection, or state-control functions around the audio route. Verify source impedance and load impedance, maintain short return paths, and place the device close to the audio connector to reduce insertion loss and susceptibility to connector-borne noise.
推荐
Handheld Device Signal Selection
MAX4855ETE+T is designed for compact handheld devices that require rail-to-rail audio-signal routing from a single low-voltage supply. Its two switch channels, 0.75 ohm on-resistance, and 2 V to 5.5 V range align with space-constrained portable electronics. The integrated comparators expand the device beyond basic multiplexing, supporting threshold-based path selection or signal-state detection. Place decoupling close to the supply pins, preserve a continuous ground plane, and use the manufacturer TQFN land pattern so the exposed pad can dissipate heat effectively.
推荐
Portable Audio Codec Interface
MAX4855ETE+T can sit beside a portable audio codec and route the codec output or another audio node through one of two SPDT paths. The low 0.75 ohm on-resistance is beneficial when preserving signal amplitude through a compact analog route, while the integrated comparators can assist with mute or source-state detection. The 3 mm x 3 mm TQFN-16 package reduces board-area demand. Confirm control polarity and comparator thresholds from the manufacturer datasheet, then validate switching transients, idle-channel behavior, and distortion with the intended codec and load.
推荐
Low-Voltage Audio Test and Control
MAX4855ETE+T is useful in low-voltage audio test and control equipment that must select between test or playback paths. Its dual SPDT architecture provides independent routing, and the integrated comparators can support threshold-based channel checks. The 2 V to 5.5 V supply range permits operation from common low-voltage laboratory rails, while 0.75 ohm on-resistance helps retain signal amplitude. For instrumentation, keep the analog input and output traces away from digital clocks and power converters, use a quiet ground reference, and verify comparator behavior across the full operating temperature range.
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推荐产品汇总
工程参考数据： MAX4855ETE+T ——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 | MAX4855ETE+ |
|---|---|---|
| Package | TQFN-16 (3 mm x 3 mm) | TQFN-16 (3 mm x 3 mm) |
| Brand | Maxim Integrated | Maxim Integrated |
| Switch Configuration | Dual SPDT | Dual SPDT |
| Number of Channels | 2 channels | 2 channels |
| On-Resistance | 0.75 ohm | 0.75 ohm |
| Supply Voltage Range | 2 V to 5.5 V | 2 V to 5.5 V |
| Signal Handling | Rail-to-rail | Rail-to-rail |
| Integrated Comparators | Yes | Yes |
| Order Packing | +T tape-and-reel | Non-+T order format |
关键差异点
- Combines dual SPDT routing with integrated comparators （对比 MAX4855ETE+)
- Combines compact routing and threshold functions （对比 MAX4855ETE+)
- Supports low-voltage portable audio systems （对比 MAX4855ETE+)
设计说明
Use the manufacturer TQFN-16 land pattern and connect the exposed pad to the ground plane with the recommended via arrangement. Place input and output traces directly from the device to their destination nodes, keep switching and high-current traces away from the audio path, and provide local supply decoupling close to the power pins. The exposed pad is part of both electrical grounding and thermal management.
Treat both SPDT paths as continuous analog routes and return the selected signal through a low-impedance ground reference. Keep source and load impedances consistent with the manufacturer application guidance, avoid long stubs, and verify insertion loss, channel isolation, and switching transients with the actual codec and connector. The 0.75 ohm on-resistance limits one source of attenuation but does not remove loss from an incorrectly implemented layout.
Do not select the order code solely from the base function. MAX4855ETE+T is the tape-and-reel variant, while MAX4855ETE+ uses a different order suffix and packing format. Both retain the same TQFN footprint, but the production bill of materials, feeder setup, and assembly plan must match the selected ordering code.
Operate the switch from a single 2 V to 5.5 V supply and verify signal amplitudes before enabling the comparator functions. Use rail-to-rail input capability as specified by the manufacturer datasheet, but do not exceed absolute-maximum limits. Validate startup behavior, supply sequencing, and audio mute requirements because the integrated comparators add functions beyond basic SPDT routing.
合规信息
The MAX4855ETE+T ordering variant is identified as RoHS compliant and lead free. No definitive REACH, halogen-free, conflict-minerals, or AEC-Q100 status is established for this exact MPN.
