MAX338EEE+ - 8:1 Low-Leakage CMOS Multiplexer | Maxim Integrated
MPN： MAX338EEE+ ✓ 啟用中MAX338EEE+ 概覽
An analog multiplexer is a semiconductor switching network that routes one selected input to a shared output. The MAX338 belongs to the CMOS analog switch and multiplexer hierarchy, where low leakage is valuable when measuring weak, high-impedance signals or when unused channels must contribute little error to the measurement system. It also supports positive-only and split-supply analog systems, allowing the same switching architecture to serve instrumentation, test, measurement, and signal-routing equipment.
Verified product information identifies one analog switch circuit, an 8:1 configuration, 400 ohm on-resistance, a 16-QSOP package, and low-leakage CMOS construction. The single-supply operating range is +4.5 V to +30 V, while dual-supply operation extends from ±4.5 V to ±20 V. These wide ranges permit use with legacy ±15 V analog circuits as well as modern single-rail systems. The EEE ordering code is associated with the industrial-grade 16-terminal surface-mount variant shown in distributor data.
Because the MAX338 is a monolithic CMOS multiplexer, its internal channels share one common output. This architecture minimizes the number of external signal paths in a multi-source measurement design, although it does not provide simultaneous access to all eight channels. Selection should therefore be based on required channel count, acceptable on-resistance, leakage limit, supply topology, and the voltage and current levels present at each switched node. Detailed leakage, bandwidth, charge-injection, and switching-time figures were not supplied in the verified excerpts and must be taken from the manufacturer datasheet.
Typical uses include automated test equipment, data-acquisition systems, sensor-signaling interfaces, process-control instrumentation, and laboratory measurement front ends. The device is particularly useful when many potential analog inputs must share one amplifier, converter, or data-acquisition channel. A suitable external circuit must also keep every input and output within the device's absolute maximum ratings during switching and fault conditions.
Designers should verify control logic levels, input overvoltage tolerance, analog signal range, and break-before-make behavior against the full datasheet before layout release. Care should be taken around unused channels, signal-source impedance, and injected charge because low leakage alone does not guarantee low measurement error. Input filtering may be appropriate when fast transients or high-energy events are possible.
This product record combines verified manufacturer and distributor information, explicit data-gap markers, same-family drop-in candidates, and practical selection guidance. It is intended to help engineers identify the correct 16-QSOP multiplexer while separating confirmed MAX338EEE+ attributes from parameters that still require direct datasheet verification.
直接替換替代品，適用於 MAX338EEE+ — 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： MAX338EEE+ （相同外形與佔位） — 差異在於 Mounting Type, Number of Channels, Package.
MAX337CPE+
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
MAX328CPE+
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
MAX329CPE+
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
MAX339CPE+
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
MAX338EPE+
✅ 直接替換聯絡詢價
查看資料表 →MAX338EEE+ 規格
| Multiplexer Configuration | 8:1 single-ended |
| Number of Switch Circuits | 1 circuit |
| Number of Channels | 8 channels |
| On-Resistance | 400 ohm |
| Switch Technology | CMOS |
| Single-Supply Operating Voltage | +4.5 V to +30 V |
| Dual-Supply Operating Voltage | ±4.5 V to ±20 V |
| 封裝 | 16-QSOP |
| Terminal Count | 16 terminals |
| 安裝類型 | Surface mount |
| Package Shape | Rectangular |
| Temperature Grade | Industrial |
| Product Family | MAX338/MAX339 8-channel/dual 4-channel low-leakage CMOS analog multiplexer family |
MAX338EEE+ rectangular 腳位配置指南
MAX338EEE+（rectangular 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： MAX338EEE+.
請參閱 資料表 以查看完整腳位配置。
典型應用
MAX338EEE+ 適用於 6 應用s: Automated Test Equipment, Data Acquisition Systems, Industrial Sensor Multiplexing, Laboratory Signal Routing, Process Control Interfaces, Battery-Powered Portable Instruments.
Automated Test Equipment
The MAX338EEE+ fits automated test systems that route several analog test points to one shared measurement channel. Its 8:1 architecture reduces external routing hardware, while the verified 400 ohm on-resistance is suitable when the selected source has relatively low impedance and the downstream instrument provides suitable input loading. The device can operate from +4.5 V to +30 V or from ±4.5 V to ±20 V, allowing integration with legacy ±15 V fixtures. Before release, verify leakage, charge injection, switching time, control levels, and maximum signal excursion against the complete manufacturer datasheet.
推薦
Data Acquisition Systems
MAX338EEE+ allows a data-acquisition board to select among eight analog inputs without duplicating the amplifier, converter, or front-end circuitry. The single-ended 8:1 arrangement is appropriate for multiplexed pressure, temperature, or process-control signals whose source impedance keeps the 400 ohm on-resistance from dominating the measurement. Its wide supply range supports both modern single-rail electronics and split-supply instrumentation. Guard against channel-selection transients by checking the datasheet for charge injection, leakage, and bandwidth before selecting input impedance and sampling rate.
推薦
Industrial Sensor Multiplexing
The MAX338EEE+ is applicable when multiple industrial sensor outputs must be presented to a common controller input. Its 8:1 configuration supports a compact sensor interface, while operation from +4.5 V to +30 V is useful in industrial control cabinets using a 24 V nominal supply. The industrial-grade ordering variant aligns with equipment operating outside consumer-only temperature conditions, although the exact temperature limits remain unverified here. Confirm signal amplitude, common-mode range, isolation needs, leakage, and fault-state behavior before deploying it with high-impedance sensors.
推薦
Laboratory Signal Routing
MAX338EEE+ can route one of eight laboratory analog sources into a common oscilloscope, DMM, or amplifier input. The 8:1 channel count is valuable when an instrument has limited analog inputs, and the 400 ohm on-resistance should be checked against the source impedance and expected bandwidth. Both +4.5 V to +30 V single-supply and ±4.5 V to ±20 V dual-supply operation provide flexibility across laboratory instruments. For precision measurements, review leakage and charge-injection specifications and account for settling time after each selection change.
推薦
Process Control Interfaces
The MAX338EEE+ can consolidate pressure, flow, level, or valve-feedback analog signals onto a single controller or data-conversion channel. Its 8:1 topology reduces analog fanout while the broad supply range permits use in 24 V-based industrial systems. The low-leakage CMOS design is potentially beneficial when sources have high output impedance, but engineers must confirm leakage, on-resistance accuracy, and switching transients from the full data sheet. Fail-safe behavior also matters because an unintended switched path could connect an external process signal to instrumentation circuitry.
推薦
Battery-Powered Portable Instruments
MAX338EEE+ can reduce analog front-end complexity in portable measurement instruments by selecting among multiple sensor inputs with one multiplexer. Although its verified supply range includes low-voltage single-rail operation, the +4.5 V minimum prevents direct operation from a single Li-ion cell below 4.5 V. A boost or buck-boost rail may therefore be required, adding conversion noise and efficiency considerations that can offset the multiplexer's low-leakage benefits. Validate shutdown current, signal loading, leakage, and settling behavior before choosing it for low-power designs.
推薦
推薦產品摘要
工程參考資料，適用於 MAX338EEE+ — 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 | MAX337CPE+ | MAX328CPE+ | MAX329CPE+ | MAX339CPE+ | MAX338EPE+ |
|---|---|---|---|---|---|---|
| Brand | Maxim Integrated | Maxim Integrated | Maxim Integrated | Maxim Integrated | Maxim Integrated | Maxim Integrated |
| Package | 16-QSOP | 16-QSOP | 16-QSOP | 16-QSOP | 16-QSOP | 16-QSOP |
| Switch Technology | Low-leakage CMOS | CMOS | Low-leakage CMOS with lower leakage than MAX338 | CMOS | Low-leakage CMOS | Low-leakage CMOS |
主要差異化特點
- Single 8:1 architecture in a 16-QSOP package (對比MAX339CPE+)
- Lower on-resistance than the explicitly identified MAX328 alternative (對比MAX328CPE+)
- Wide single- and dual-supply operating range (對比MAX338EPE+)
設計說明
Confirm source impedance, acquisition bandwidth, charge injection, and settling time before fixing the input network. The verified 400 ohm on-resistance can be acceptable for low-impedance sources, but it may form a significant divider with a high-impedance sensor or sample-and-hold input. Verify the complete manufacturer data sheet for leakage and injection limits because those values were not present in the supplied excerpts.
Route analog inputs and the common output as short traces away from digital select and clock lines, and place the common output close to the destination amplifier or converter when practical. Keep unused-channel connections defined according to the datasheet rather than allowing them to float if leakage is significant. Use a solid ground reference and avoid placing the analog trace beneath switching-regulator or digital-logic routing.
The verified supply range of +4.5 V to +30 V or ±4.5 V to ±20 V provides flexibility, but the multiplexer does not remove the need for stable analog rails. Bypass the supply pins according to the manufacturer recommendations, account for control-logic levels referenced to the applicable supply, and ensure every selected analog node remains within the absolute maximum ratings during startup and fault conditions.
Do not treat the MAX338 as a simultaneous eight-channel sampler; only one input connects to the common output at a time. Also, the manufacturer statement that MAX338 and MAX339 are upgrades for DG508A and DG509A does not establish a reverse drop-in relationship. Confirm channel mapping, address logic, break-before-make behavior, and pin names for any substitution against the manufacturer pin table.
合規資訊
The supplied verified excerpts do not state RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals status. Obtain the current manufacturer compliance declarations before production release.
