MAX335EWG+ - 8-Channel SPST Serial Switch | Analog Devices
料号： MAX335EWG+ ✓ 量产中MAX335EWG+ 概述
An analog switch is a semiconductor interface that connects or disconnects signal paths under digital control. The MAX335 belongs to the broader CMOS analog-switch and interface-IC hierarchy, where the switch handles analog signal routing while a serial interface controls channel state. Each SPST channel provides one normally open path, allowing external circuitry to select among multiple signals without redesigning the analog path.
The MAX335EWG+ features a nominal 150 ohm on-resistance, approximately 400 ns switching times, 90 dB isolation, and an industrial operating-temperature range from -40 C to +85 C. Its serial control reduces the number of external control pins required when multiple channels must be managed in a compact system. The analog signal path is designed to maintain consistent resistance across the specified signal range.
Use the device when a system needs eight independently addressable SPST routes and can accept a serial command interface. A typical implementation places the switch between a sensor or measurement source and a downstream analog front end, allowing the controller to select test channels or isolate signal paths. The -15 V to +20 V supply range supports both positive and negative analog signal environments.
PCB layout should keep analog traces short, provide a stable ground reference, and place decoupling capacitors close to the supply pins. The serial interface requires correct logic levels and signal timing; the manufacturer datasheet should be used for pin assignment and serial protocol details. Confirm the maximum signal voltage, current, and switching conditions before finalizing the design.
This product page consolidates the MAX335EWG+ electrical specifications, package information, sourcing guidance, and practical design considerations into one reference for engineers evaluating serial-controlled analog routing.
直接替换替代料： MAX335EWG+ ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
MAX335CWG+
✅ 直接替换📋 参考替代料（不在目录中）
MAX335EWG+ 最大额定值与电气特性
| Product Type | Serial-controlled 8-channel analog switch |
| Channel Configuration | 8 x SPST |
| Number of Switches | 8 |
| On-Resistance | 150 ohm |
| Supply Voltage Range | -15 V to +20 V |
| Switching Time, tON | 400 ns |
| Switching Time, tOFF | 400 ns |
| Off Isolation | 90 dB |
| 工作温度 | -40 C to +85 C |
| 封装 | 24-pin WSOIC |
| 安装类型 | Surface mount |
| Control Interface | Serial digital interface |
| Signal Conduction Direction | Equal in either direction |
MAX335EWG+ 24-pin wsoic 引脚配置指南
MAX335EWG+（24-pin wsoic 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： MAX335EWG+.
请参阅 数据手册 以查看完整引脚配置。
典型应用
MAX335EWG+ 适用于 6 应用s: Automated Test Systems, Data Acquisition Signal Routing, Industrial Sensor Multiplexing, Instrumentation Signal Isolation, Precision Signal Switching, Battery-Powered Portable Equipment.
Automated Test Systems
The MAX335EWG+ fits automated test systems that must connect a source or measurement channel to one of several analog test points. Eight independently controlled SPST paths reduce the number of discrete relay or wiring resources, while the 400 ns switching times help the controller sequence measurements quickly. Its 150 ohm on-resistance should be included in the input impedance budget, and the 90 dB isolation specification supports isolation between selected paths. Use the serial interface to issue channel commands and allow the settling interval required by the measurement front end before taking a reading.
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Data Acquisition Signal Routing
The MAX335EWG+ can route several analog inputs through a shared acquisition chain without requiring a separate control line for every channel. Its eight SPST switches conduct equally in either direction, making the same device usable for source selection and signal isolation. The nominal 150 ohm resistance is manageable for moderate-impedance sensors, while the 400 ns turn-on and turn-off characteristics support rapid channel changes. Designers should evaluate the sensor output impedance, settling requirements, and maximum allowable analog signal level before assigning the switch nodes.
推荐
Industrial Sensor Multiplexing
The MAX335EWG+ is appropriate for industrial equipment that must select among multiple sensor outputs or connect a controller to different measurement lines. The -40 C to +85 C operating range suits industrial environments, and the -15 V to +20 V supply capability supports systems using negative or positive analog rails. Because the device is a solid-state analog switch, its 400 ns switching behavior is suitable for fast sampling sequences. Use careful grounding and short analog traces, and verify that each sensor remains within the switch's voltage, current, and power limits.
推荐
Instrumentation Signal Isolation
The MAX335EWG+ can isolate inactive channels in instrumentation and measurement equipment, helping prevent unintended signal paths from loading a selected input. Its 90 dB off-isolation specification provides the relevant off-state attenuation metric for system-level design. The eight SPST channels are controlled through the serial interface, which keeps the control wiring compact compared with a bank of discrete control lines. Check the signal amplitude and source impedance, and include the 150 ohm on-resistance when calculating the attenuation introduced by a closed channel.
推荐
Precision Signal Switching
The MAX335EWG+ is useful when an analog signal must be switched bidirectionally between circuit sections, because all channels conduct equally in either direction. Its on-resistance is stated to remain constant over the analog signal range, supporting repeatable insertion-loss calculations for moderate-level signals. The 400 ns switching times are substantially faster than electromechanical solutions, allowing a controller to perform scan and isolation functions rapidly. The circuit must still comply with the device's analog signal and current ratings, and the receiving amplifier should account for switch resistance and loading.
推荐
Battery-Powered Portable Equipment
The MAX335EWG+ can provide compact analog routing in portable equipment where a separate control line for each channel would consume excessive board space. The serial interface supports integrated system control, while the low-voltage compatibility range of -15 V to +20 V covers many mixed-signal systems. The 150 ohm on-resistance may be acceptable for higher-impedance sensor and measurement nodes, but it is not ideal for demanding low-impedance loads. Verify standby behavior, supply sequencing, signal limits, and the complete pin map in the manufacturer data sheet before using it in a battery-powered product.
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推荐产品汇总
工程参考数据： MAX335EWG+ ——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 | MAX335CWG+ |
|---|---|---|
| Package | 24-pin WSOIC | 24-pin WSOIC |
| Brand | Maxim Integrated / Analog Devices | Maxim Integrated / Analog Devices |
| Number of Channels | 8 | 8 |
| Switch Configuration | SPST | SPST |
| On-Resistance | 150 ohm | Approximately 100 ohm |
关键差异点
- Eight-channel serial control （对比 MAX335CWG+)
- Bidirectional conduction （对比 MAX335CWG+)
- Industrial temperature operation （对比 MAX335CWG+)
设计说明
Keep the analog switch nodes and their connected traces short to reduce parasitic resistance, capacitance, and susceptibility to pickup. Place supply-decoupling capacitors as close as practical to the device power pins. Route the serial interface away from sensitive analog paths, use a continuous ground reference, and follow the manufacturer pin table when assigning the 24-pin WSOIC footprint.
Do not treat the -15 V to +20 V supply rating as the maximum permitted signal voltage. Check the absolute maximum ratings and recommended operating conditions for each analog input, output, and control signal. Also include the nominal 150 ohm on-resistance in the source-load calculation, because it can create signal attenuation with lower-impedance downstream circuitry.
Allow the analog path to settle after each 400 ns switching event before making a precision measurement. The settling behavior depends on the source impedance, downstream capacitance, amplifier bandwidth, and the selected switch resistance. For high-speed sampling, use the manufacturer timing and charge-injection information to determine whether an additional buffer or guard strategy is required.
合规信息
The available product information does not state the RoHS, REACH, lead-free, halogen-free, or conflict-minerals status. The MAX335EWG+ is an industrial analog switch and is not identified as an automotive-qualified device.
