MAX354EWE+ 8:1 Fault-Protected Analog Multiplexer | Analog Devices
料号： MAX354EWE+ ✓ 量产中MAX354EWE+ 概述
An analog multiplexer is an interface IC that connects multiple signal paths to a shared processing or measurement resource. The MAX354 belongs to the broader switch and multiplexer hierarchy, where multiplexing reduces the number of input channels, converters, amplifiers, or external connectors required by an electronic system. Its fault-protected architecture is especially useful when external signals can exceed the nominal supply range during startup or abnormal operating conditions.
The MAX354EWE+ provides eight channels, a 350 ohm on-resistance, and protection against overvoltage up to 40 V beyond the supply rails. These characteristics make the device relevant to data acquisition, instrumentation, test systems, industrial control, and battery-powered equipment. The MAX354/MAX355 family uses a series N-channel, P-channel, N-channel structure that isolates protected downstream components from excessive input voltage.
The device is specified as a single-ended multiplexer in a 16-SOIC surface-mount package. Its industrial temperature grade suits equipment expected to operate across demanding environmental conditions. Because on-resistance and protection behavior influence signal fidelity and system reliability, designers should account for the complete source impedance, selected channel, supply state, and external signal amplitude rather than treating the switch as an ideal conductor.
Typical uses include eight-channel sensor selection, industrial measurement front ends, automated test equipment, and embedded control systems that need to share an analog-to-digital converter or signal-conditioning channel. In these systems, the multiplexer reduces channel count while the fault-protected structure provides additional tolerance for externally driven signals. The final input range must remain compatible with the complete signal chain and device operating limits.
A key design consideration is the relationship between the multiplexer, the protected signal source, and downstream circuitry. Keep sensitive return paths compact, observe the manufacturer’s pin configuration when assigning inputs and enables, and evaluate the switch resistance in the source impedance of the selected channel. The 350 ohm on-resistance is especially important for high-impedance sensors and low-amplitude measurements.
This product page combines the manufacturer’s multiplex function, protection characteristics, package details, application analysis, and parameter-level comparison. It also distinguishes device-family options from true pin-compatible drop-in replacements so that PCB changes are not mistaken for a straightforward substitution.
直接替换替代料： MAX354EWE+ ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
该产品暂无直接替换替代料。
请求替代料MAX354EWE+ 规格参数
| Multiplexer Configuration | 8:1 |
| Number of Circuits | 1 circuit |
| Number of Channels | 8 channels |
| Signal Type | Single-ended analog |
| On-Resistance | 350 ohm |
| Overvoltage Protection | Up to 40 V beyond the supply rails |
| Protection Structure | Series N-channel, P-channel, N-channel structure |
| 封装 | 16-pin SOIC |
| Package Code | SOP |
| Terminal Count | 16 terminals |
| 安装类型 | Surface mount |
| Package Shape | Rectangular |
| Temperature Grade | Industrial |
| RoHS 状态 | Compliant |
| Multiplexer Type | Fault-protected analog multiplexer |
MAX354EWE+ rectangular 引脚配置指南
MAX354EWE+（rectangular 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： MAX354EWE+.
请参阅 数据手册 以查看完整引脚配置。
典型应用
MAX354EWE+ 适用于 6 应用s: Industrial Sensor Multiplexing, Data Acquisition Systems, Automated Test Equipment, Battery-Powered Monitoring, Process Control Interfaces, Automotive Electrical Node Selection.
Industrial Sensor Multiplexing
The MAX354EWE+ suits industrial acquisition systems that must route eight single-ended sensor signals into one measurement channel. Its 8:1 architecture reduces the number of analog inputs required at the converter or amplifier, while fault protection to 40 V beyond the supply rails adds tolerance during abnormal external-signal conditions. The 350 ohm on-resistance must be included in the impedance budget for high-impedance sensors. Use the manufacturer pin table to assign channels and controls, place the device close to the sensor interface, and verify that every input remains within the absolute maximum ratings. A low-input-impedance amplifier or converter can reduce the practical effect of the switch resistance.
Data Acquisition Systems
The MAX354EWE+ is useful in compact data-acquisition equipment that must consolidate eight single-ended measurements into a shared analog processing path. The single 8:1 multiplexer reduces front-panel connector count and can simplify synchronization when only one channel is measured at a time. Its 350 ohm on-resistance is compatible with many conventional signal-conditioning stages, but designers should calculate the total source impedance and amplifier bias current. The fault-protection structure helps isolate sensitive circuitry when an external source exceeds the normal rail during startup or shutdown. Validate channel settling, grounding, and acquisition timing against the required measurement bandwidth.
Automated Test Equipment
The MAX354EWE+ can route one of eight test points to a shared measurement amplifier in automated test equipment. The 8:1 configuration reduces the number of front-end channels required by test systems that exercise multiple nodes sequentially. Its fault-protected input is useful where test fixtures may present unexpected voltage during connection, power sequencing, or fixture faults. Engineers should account for the 350 ohm on-resistance when defining low-amplitude test accuracy and use short, well-shielded routes from the connector field to the multiplexer. Confirm channel enable polarity, common wiring, and the input voltage limits in the manufacturer documentation before finalizing fixture behavior.
Battery-Powered Monitoring
The MAX354EWE+ supports compact battery-powered monitoring equipment that monitors several external analog conditions through one common signal path. Consolidating eight channels into one multiplexer can reduce converter count and simplify the analog signal chain, although quiescent current and switching behavior must be checked against the power budget. The 350 ohm on-resistance can be acceptable for many medium-impedance sensing networks but may attenuate very high-impedance sources. Use the device only where external overvoltage events remain within its protection and absolute-maximum limits. Local bypass capacitance and a stable analog ground remain important for preserving measurement quality in compact systems.
Process Control Interfaces
The MAX354EWE+ fits process-control interfaces that monitor eight related analog inputs, such as pressure, position, or current-sense channels. Its industrial temperature grade and fault-protected architecture are useful when external field wiring can expose the electronics to voltage excursions. The 350 ohm switch resistance contributes to the effective source impedance, so the downstream amplifier should be selected to preserve the required accuracy and common-mode range. Keep the analog path away from high-current switching nodes, use a single low-impedance ground strategy, and verify channel isolation and settling from the manufacturer electrical tables. This integration reduces connector complexity without creating a separate front end for every signal.
Automotive Electrical Node Selection
The MAX354EWE+ can support controlled selection of eight automotive electrical nodes when the signal amplitude and fault exposure fall within the device’s ratings. The 8:1 single-ended arrangement helps consolidate monitoring of repeated inputs such as switches, sensors, or diagnostic returns, while fault protection provides additional separation during abnormal electrical conditions. The manufacturer identifies the MAX354 family as production and industrial temperature grade, but it does not identify this exact variant as AEC-Q100 qualified. Automotive designers must therefore confirm automotive qualification separately. They should also examine cold-start behavior, ground offsets, transient protection, and the 350 ohm on-resistance in the complete vehicle electrical environment.
工程参考数据： MAX354EWE+ ——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 |
|---|---|
| Package | 16-SOIC |
| Brand | Analog Devices |
| Multiplexer Configuration | 8:1 |
| Channel Count | 8 single-ended channels |
| On-Resistance | 350 ohm |
| Overvoltage Protection | Up to 40 V beyond the supply rails |
| Circuit Count | 1 circuit |
| Temperature Grade | Industrial |
| Mounting Type | Surface mount |
| RoHS Status | Compliant |
关键差异点
- Single-ended 8:1 routing in one 16-SOIC device （对比 MAX355EWE+)
- Defined 350 ohm on-resistance （对比 MAX358EWE+)
- Fault protection to 40 V beyond the rails （对比 MAX358EWE+)
设计说明
Include the 350 ohm on-resistance, source impedance, and downstream amplifier input impedance when calculating measurement attenuation. For high-impedance sources, amplifier bias current can create an additional error voltage across the switch resistance. Shorten the source trace, use a low-leakage input stage where necessary, and verify settling behavior with the selected channel and supply conditions.
Place the MAX354 close to the connector or sensor interface so the multiplexed analog path remains short. Keep the common and supply returns continuous, avoid routing the analog route beside high-current switching nodes, and use a stable ground reference. The exact channel, enable, supply, and common assignments must be taken from the manufacturer pin-description table before assigning PCB nets.
Fault protection to 40 V beyond the supply rails does not permit unrestricted input voltage. Check absolute maximum ratings, supply sequencing, power-up behavior, and the maximum amplitude of every external signal before operation. Do not infer that a related dual-multiplexer family member is interchangeable; its 4-channel configuration may require different routing and control logic.
Place the manufacturer-recommended bypass capacitors at the supply pins and keep their return paths short. Evaluate supply currents and control states under the maximum expected load and fault condition. Because the numerical supply range and quiescent current are not established on the product page, consult the manufacturer electrical-characteristics table before selecting the supply voltage or power budget.
合规信息
The MAX354EWE+ is identified as RoHS compliant. No separate REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals qualification statement was established for this exact ordering code.