MAX4855ETE+T - Dual SPDT Audio Switch | Maxim Integrated
MPN： MAX4855ETE+T ✓ 啟用中MAX4855ETE+T 概覽
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.
直接替換替代品，適用於 MAX4855ETE+T — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： MAX4855ETE+T （相同外形與佔位） — 差異在於 On-Resistance, Package.
MAX4855ETE+
✅ 直接替換聯絡詢價
查看資料表 →MAX4855ETE+T 最大額定值與電氣特性
| 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 |
| 封裝 | 16-pin TQFN with exposed pad |
| Package Dimensions | 3 mm x 3 mm |
| Package Height | 0.8 mm |
| 工作溫度範圍 | -40°C to +85°C |
| 安裝類型 | Surface mount |
| Order Code | MAX4855ETE+T |
| Shipping Format | Tape and reel |
| Lead-Free Status | Lead free |
| RoHS 狀態 | RoHS compliant |
MAX4855ETE+T 0.8 mm 腳位配置指南
MAX4855ETE+T（0.8 mm 封裝）的腳位配置。 腳位編號、功能與連接圖定義於製造商資料手冊中。請參閱該手冊以取得確切的封裝尺寸與焊接指引。
無詳細腳位定義資料： MAX4855ETE+T.
請參閱 資料表 以查看完整腳位配置。
典型應用
MAX4855ETE+T 適用於 6 應用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.
推薦
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.
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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.
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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.
推薦
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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推薦產品摘要
工程參考資料，適用於 MAX4855ETE+T — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | 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 |
主要差異化特點
- Combines dual SPDT routing with integrated comparators (對比MAX4855ETE+)
- Combines compact routing and threshold functions (對比MAX4855ETE+)
- Supports low-voltage portable audio systems (對比MAX4855ETE+)
設計說明
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.
合規資訊
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.
