MAX337CWI+ - Dual 8:1 CMOS Multiplexer | Analog Devices
部品番号: MAX337CWI+ ✓ 生産中MAX337CWI+ 概要
An analog multiplexer is a semiconductor switch that connects one selected input to a shared output. A dual 8:1 CMOS multiplexer expands two independent groups of eight inputs into two common outputs. This hierarchy places the MAX337CWI+ within analog switches, interface ICs, and general-purpose signal-routing devices. It reduces the number of external routing components while allowing one controller to select among multiple analog signals.
The MAX337 family is identified as a 16-channel dual 8-channel, low-leakage CMOS analog multiplexer. According to the manufacturer product page, MAX337 is in production, and the manufacturer datasheet describes the device as a monolithic CMOS analog multiplexer. Its 8:1 configuration uses address-control inputs to select one input per section and route it to the corresponding common output.
The listed 400 ohm on-resistance provides the principal quantified electrical characteristic for this exact listing. It determines the series loss and interaction between the selected source and destination when the switch is on. Low leakage is especially important when the mux precedes high-impedance analog nodes, because leakage current can create an error voltage proportional to the input source impedance.
Typical uses include battery-cell monitoring, sensor multiplexing, data acquisition, automated test equipment, and laboratory instruments. The dual architecture is particularly useful when two related analog quantities must be selected independently, such as paired sensor outputs or two channels within a multichannel measurement system. The same common-output arrangement can also be used to share a downstream amplifier or converter between several inputs.
Designers should treat the address controls as digital signals while paying attention to the analog signal range, source impedance, and leakage of the connected sources. Place bypass and signal-conditioning components close to the mux pins, keep analog routing away from high-current switching nodes, and use a suitable common-ground strategy. Review the manufacturer pin-description table and operating limits before finalizing the board layout.
This page combines the manufacturer overview, distributor identification, package details, cross-reference results, and practical selection guidance for the MAX337CWI+. It also distinguishes a verified dual 8:1 replacement candidate from devices that use a different package or channel architecture, helping engineers narrow replacement decisions without confusing functional similarity with true drop-in compatibility.
ドロップイン代替品: MAX337CWI+ — 同一パッケージでピン互換。PCBの作り直しが必要な異なるパッケージの部品は除外されています。
MAX307EWI+
✅ ドロップイン📋 参考代替品（カタログ未掲載）
MAX337CWI+ 仕様
| Product Type | Dual 8:1 CMOS analog multiplexer |
| Total Number of Switched Inputs | 16 inputs |
| Multiplexer Configuration | 2 circuits, dual 8:1 |
| On-Resistance | 400 ohm |
| Technology | CMOS |
| Low-Leakage Design | Low leakage |
| Number of Terminals | 28 terminals |
| パッケージ | 28-pin SOIC |
| Package Code | SOP |
| Package Shape | Rectangular |
| 実装タイプ | Surface mount |
| Temperature Grade | Commercial |
| Production Status | Production |
MAX337CWI+ rectangular ピン配置ガイド
MAX337CWI+ (rectangular パッケージ) のピン配置。 ピン番号、機能、接続図はメーカーのデータシートで定義されています。正確なフットプリントとはんだ付けのガイドラインについては、データシートを参照してください。
詳細なピン配置データはありません: MAX337CWI+.
詳細は データシート をご参照ください。
主な用途
MAX337CWI+ の用途: 6 件s: Battery-Cell Monitoring, Sensor Signal Multiplexing, Automated Test Equipment, Data-Acquisition Systems, Laboratory Instrumentation, Process-Control Analog Inputs.
Battery-Cell Monitoring
The MAX337CWI+ fits multichannel battery-monitoring systems because its dual 8:1 architecture can select two groups of eight analog inputs while keeping the switching network compact. The low-leakage characteristic is valuable when source impedance is high enough that leakage current could create a measurement error. Place the device near the sensed input connectors, route sensitive nets away from switching power paths, and confirm that the selected signal range remains within the manufacturer limits for the operating supply.
おすすめ
Sensor Signal Multiplexing
The MAX337CWI+ is useful when several high-impedance sensor outputs must share an amplifier, converter, or data-acquisition front end. Each 8:1 section can route one of eight inputs to a common output, allowing paired sensor groups to use the same downstream signal chain. The listed 400 ohm on-resistance should be included in the source-impedance and gain-error calculation, while the low-leakage design helps minimize errors introduced by the multiplexer itself.
おすすめ
Automated Test Equipment
The MAX337CWI+ supports resource-sharing architectures in automated test systems where multiple analog test points must connect to a common measurement channel. Two independent 8:1 sections can reduce the number of external switches and provide separate paths for paired measurements. Place the mux close to the instrumentation amplifier to limit sensitivity to injected noise, and verify the address-control timing and acquisition settling requirements in the complete test path.
おすすめ
Data-Acquisition Systems
The MAX337CWI+ can consolidate multiple analog channels into two common outputs in a compact data-acquisition design. This architecture is most effective when the downstream converter or amplifier can be time-shared and when switching settling time is short enough for the selected measurement rate. Calculate the settling allowance from the source impedance, 400 ohm on-resistance, downstream capacitance, and acquisition timing rather than relying on switching speed alone.
おすすめ
Laboratory Instrumentation
The MAX337CWI+ is applicable to programmable laboratory instruments that route several measurement inputs into a common amplifier or converter. Its 28-pin SOIC package supports compact analog boards, and the dual 8:1 organization allows two independent source selections where paired measurements are needed. Use short analog traces, maintain a continuous return path, and avoid placing the mux near high-impedance nodes that require additional guarding.
おすすめ
Process-Control Analog Inputs
The MAX337CWI+ can select multiple process-control analog inputs for monitoring or conditioning in industrial equipment. The dual arrangement supports two common analog outputs, reducing the number of routing components when signals originate from separate sensor groups. Ensure the mux is powered from a source with suitable noise behavior, check the common-mode range of every selected input, and place protection networks so inactive channels cannot inject excessive current into the device.
おすすめ
おすすめ製品の概要
エンジニアリング参考データ: MAX337CWI+ — 比較、設計ガイダンス、コンプライアンス情報。
選定ガイド
代替品との比較
| パラメータ | この製品 | MAX307EWI+ |
|---|---|---|
| Brand | Maxim Integrated | Maxim Integrated |
| Package | 28-pin SOIC | 28-pin WSOIC |
| Multiplexer Configuration | Dual 8:1 | Dual 8:1 |
| Total Switched Inputs | 16 inputs | 16 inputs |
| Technology | CMOS | CMOS |
| Number of Terminals | 28 terminals | 28 terminals |
主な差別化要因
- Two independent 8:1 routing sections in one package （vs MAX336CWI)
- Verified dual 8:1 same-package cross-reference （vs MAX307EWI+)
- Compact 28-pin integration （vs MAX306CPI+)
設計ノート
Treat the 400 ohm on-resistance as part of the complete source impedance seen by the selected analog input. That resistance, together with the sensor impedance and mux leakage, contributes to gain error and establishes the maximum practical settling behavior. Keep the selected trace short, minimize parasitic capacitance at the common output, and place any downstream amplifier close enough to preserve signal integrity.
Place the MAX337CWI+ near the connector or sensor interface that supplies the analog signals. Route each common output directly toward its downstream amplifier or converter, avoid sharing narrow return paths with digital switching currents, and provide a continuous ground reference beneath the analog routing area. Review the manufacturer pin layout and exposed routing requirements before fixing the footprint.
Do not assume that any dual 8:1 multiplexer is interchangeable merely because the channel count matches. Verify the 28-pin assignment, address polarity, common-output locations, supply pins, control timing, on-resistance conditions, leakage limits, and absolute maximum ratings. The MAX306CPI+ comparison is not drop-in because it uses a 28-pin DIP package, while the MAX336 has a different 16:1 control architecture.
コンプライアンス情報
The manufacturer product page identifies MAX337 as a production device, but the available information does not state the requested environmental, material, or automotive qualification attributes.