MAX4855ETE+ - 0.75Ω Dual SPDT Audio Switch | Analog Devices
MPN： MAX4855ETE+ ✓ 啟用中MAX4855ETE+ 概覽
An analog switch is an integrated circuit that routes low-frequency analog signals between circuit nodes under digital control. The MAX4855 belongs to the analog-switch and multiplexer hierarchy, where SPDT means single-pole, double-throw: one common terminal can be connected to either of two switched terminals. This makes the device useful for selecting audio paths, supporting speaker-to-headset routing, and implementing controlled source selection within portable consumer electronics.
Key features include two independently controlled SPDT channels, 0.75 Ω on-resistance, operation across a 2 V to 5.5 V supply range, and integrated comparators. The low on-resistance helps limit signal attenuation in audio paths, while the compact 3 mm × 3 mm package saves board area in cell phones, notebook computers, PDAs, and other handheld devices. The manufacturer identifies audio-signal routing and speaker-headset switching as principal applications.
Each switch channel uses a common terminal and two selectable terminals, with control logic determining the active signal path. Integrated comparators can assist in detecting or controlling signal conditions without requiring separate comparison circuitry. The device uses a CMOS implementation and is specified in a TQFN-16 package, identified by package code MO-220-WEED in distributor documentation. The + suffix denotes the lead-free ordering option, while ETE identifies the extended-temperature 16-pin TQFN package configuration.
Typical deployments include headphone and headset routing, audio accessory selection, portable-device input selection, and compact audio-signal switching. Because the MAX4855 handles analog paths rather than high-speed data, its principal design concerns are acceptable insertion loss, off-state leakage, control compatibility, exposed-pad grounding, and clean supply bypassing rather than digital edge-rate performance.
In layout, place input and output routing close to the switched pins to minimize parasitic capacitance and pickup. Connect the exposed thermal pad and ground pins according to the manufacturer land pattern, provide local supply decoupling, and keep control traces away from sensitive audio paths. Verify that the selected signal amplitude and supply voltage remain inside the device's stated operating limits.
This page consolidates manufacturer specifications, distributor availability, application guidance, sourcing information, and design cautions into one engineering reference. It also distinguishes verified facts from parameters that still require confirmation from the full datasheet, helping designers avoid assuming unreported electrical limits or pin functions.
直接替換替代品，適用於 MAX4855ETE+ — 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。
此產品無可直接替換的替代品。
申請替代品MAX4855ETE+ 最大額定值與電氣特性
| Product Type | Dual SPDT analog audio switch with integrated comparators |
| Number of Channels | 2 channels |
| Switch Configuration | Dual single-pole, double-throw (SPDT) |
| On-Resistance | 0.75 Ω |
| Supply Voltage Range | 2 V to 5.5 V |
| 工作溫度範圍 | -40°C to +85°C |
| 封裝 | 16-pin thin QFN, 3 mm × 3 mm |
| Package Code | MO-220-WEED |
| Package Height | 0.8 mm |
| 安裝類型 | Surface mount |
| Process Technology | CMOS |
| Manufacturer Lifecycle Designation | PRODUCTION |
MAX4855ETE+ 0.8 mm 腳位配置指南
MAX4855ETE+（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+.
請參閱 資料表 以查看完整腳位配置。
典型應用
MAX4855ETE+ 適用於 6 應用s: Speaker and Headset Switching, Portable Audio Signal Routing, Notebook Computer Audio Selection, Handheld Device Input Selection, Microphone and Line-In Routing, Audio Accessory Multiplexing.
Speaker and Headset Switching
The MAX4855ETE+ fits speaker-to-headset routing because it provides two SPDT analog channels, a specified 0.75 Ω on-resistance, and operation from 2 V to 5.5 V. According to the Analog Devices manufacturer datasheet, speaker-headset switching is a principal application. Place the common signal node on the common terminals and use the switched terminals for the two destination paths, then verify that headphone or speaker loading does not exceed the device's detailed electrical limits. The compact 3 mm × 3 mm TQFN also leaves more board area for the codec, amplifier, and passive components in portable equipment.
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Portable Audio Signal Routing
The MAX4855ETE+ is appropriate for routing audio among microphone, line input, and playback stages in compact portable equipment. Its dual SPDT structure can select two signal relationships while the 0.75 Ω on-resistance helps minimize avoidable insertion loss. According to the Analog Devices manufacturer datasheet, the device is intended for audio-signal routing in cell phones, notebook computers, PDAs, and other handheld devices. The 2 V to 5.5 V operating range also aligns with low-voltage portable systems, subject to confirming control thresholds and analog-node limits.
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Notebook Computer Audio Selection
The MAX4855ETE+ can select audio routes in a notebook computer where internal speakers, an external headset, and other accessories share analog connections. Its two independently controlled SPDT channels and 3 mm × 3 mm package support compact routing without consuming the footprint of two discrete switch packages. According to the Analog Devices manufacturer datasheet, notebook computers are a target application and the specified on-resistance is 0.75 Ω. Engineers should still account for cable transients, grounding, and the voltage presented by accessory interfaces when selecting protection and signal-conditioning components.
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Handheld Device Input Selection
The MAX4855ETE+ supports input-source selection in PDAs and other handheld devices where internal and external audio paths must be routed under software control. The compact TQFN package is suitable for space-constrained boards, and the dual SPDT organization can control two selections. According to the Analog Devices manufacturer datasheet, its 0.75 Ω on-resistance and 2 V to 5.5 V supply operation suit low-voltage portable audio systems. Layout should keep switched-node traces short, maintain a quiet ground reference, and follow the manufacturer's exposed-pad connection instructions.
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Microphone and Line-In Routing
The MAX4855ETE+ can route microphone or line-level signals between analog sources in a compact audio front end. The 0.75 Ω specified on-resistance reduces loss introduced by the switch itself, while the integrated comparators provide additional control or detection functions. According to the Analog Devices manufacturer datasheet, integrated comparators are part of the MAX4855 feature set. When selecting input limits, check the complete datasheet for maximum analog voltage, leakage, and off-isolation, because those values were not included in the verified search snippets.
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Audio Accessory Multiplexing
The MAX4855ETE+ is suitable for multiplexing several accessories onto a shared audio bus in a portable system. Two SPDT channels can each choose between two destinations, reducing the number of discrete routing elements required on the board. According to the Analog Devices manufacturer datasheet, the device is designed for audio-signal routing and speaker-headset switching, with a 3 mm × 3 mm package and 0.75 Ω on-resistance. The system must prevent accessory inputs from exceeding the switched-node ratings, and control firmware should account for every switch state during boot, mute, and shutdown transitions.
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推薦產品摘要
工程參考資料，適用於 MAX4855ETE+ — 比較、設計指引及合規資訊。
選型指南
Do not choose it solely because another Maxim part also routes audio. Compare the verified switch resistance, off-isolation, leakage, bandwidth, supply current, logic thresholds, analog-node limits, and exposed-pad configuration against the complete manufacturer datasheet. A genuine replacement must also preserve the 16-pin TQFN land pattern and pin assignments. The supplied cross-reference data does not verify five drop-in equivalents, so no substitute should be approved without a complete package, pinout, and electrical comparison.
與替代品比較
| 參數 | 本產品 |
|---|---|
| Package | 16-pin thin QFN, 3 mm × 3 mm |
| Brand | Analog Devices |
| Switch Configuration | Dual SPDT |
| Number of Channels | 2 channels |
| On-Resistance | 0.75 Ω |
| Supply Voltage Range | 2 V to 5.5 V |
| Operating Temperature Range | -40°C to +85°C |
| Integrated Comparators | Yes |
| Process Technology | CMOS |
| Manufacturer Lifecycle Status | PRODUCTION |
主要差異化特點
- Low on-resistance for compact audio routing (對比Unverified MAX4855-family alternatives)
- Space-saving package for portable devices (對比Larger packaged SPDT switches)
- Integrated comparators add functionality (對比Basic mechanical or passive analog switches)
設計說明
Route each common, switched, and control connection directly to its intended MAX4855ETE+ pin with minimal trace length. Keep sensitive audio nets away from digital control traces and noisy power paths. The 3 mm × 3 mm TQFN footprint provides little routing room, so land-pattern fidelity and the manufacturer's exposed-pad ground guidance are essential to preserve signal integrity and predictable return currents.
Do not infer that a similarly named Maxim part is a drop-in replacement from its family name or function alone. A valid substitute must match the 16-pin TQFN land pattern, common and switched-terminal assignments, control polarity, analog voltage limits, on-resistance, and power behavior. Verify every pin against the manufacturer pin configuration before replacing MAX4855ETE+ on an existing PCB.
Supply the MAX4855ETE+ from a clean 2 V to 5.5 V rail and place the required bypass capacitor close to the supply and ground pins. The verified data does not specify the capacitor value or supply-current limit, so those details must come from the manufacturer datasheet rather than estimation. Confirm that control-pin thresholds remain valid at the minimum operating supply.
The specified 0.75 Ω on-resistance should be treated as one element in the complete audio path, not as the only insertion-loss value. Source impedance, load impedance, switch leakage, off-isolation, and frequency-dependent behavior also affect channel balance and attenuation. Use the manufacturer test conditions when comparing these values and validate the final routing with the intended source and load.
合規資訊
The verified data confirms the ETE+ ordering option and a lead-free product page designation, but it does not explicitly state RoHS, REACH, AEC-Q100, halogen-free, or conflict-minerals compliance. AEC-Q100 is treated as not applicable because this is a consumer or industrial audio-switch IC rather than an automotive-qualified device.
