MAX338EEE+T - 8:1 CMOS Analog Multiplexer | Maxim Integrated
料号： MAX338EEE+T ✓ 量产中MAX338EEE+T 概述
An analog multiplexer is an interface IC that routes multiple analog signals through one common connection. The MAX338 belongs to the CMOS analog switch family, combining an 8:1 multiplexer with low-leakage switching elements. This allows a measurement system, data-acquisition circuit, or industrial control board to reduce the number of dedicated signal paths while preserving accurate analog connectivity.
The principal features include an 8:1 configuration, 400 ohm on-resistance, and 20 pA leakage. Its address and enable controls are TTL-compatible from +0.8 V to +2.4 V across the specified temperature and supply ranges. These characteristics make the device useful when a system must select among sensor outputs, measurement inputs, or multiplexed test points without using a separate connector for every channel.
The MAX338 is fabricated using Maxim's 44 V silicon-gate process, supporting operation with relatively wide supply voltages. The manufacturer identifies the MAX338 and MAX339 as improved, pin-compatible upgrades for the industry-standard DG508A and DG509A. Related MAX328 and MAX329 devices provide lower leakage and charge injection but higher on-resistance, creating a useful trade-off between leakage, switching transients, and signal resistance.
Typical applications include data-acquisition systems, automated test equipment, industrial process monitoring, medical instrumentation, and communication-interface boards. An eight-channel bank can route eight analog sources into one amplifier, comparator, or converter input, while complementary address and enable logic controls the selected path. The industrial temperature grade also supports equipment intended for factory, laboratory, and communications environments.
PCB design should place input and output traces away from high-speed digital paths, provide a stable ground reference, and observe the supply and decoupling requirements in the manufacturer datasheet. Because the multiplexer contributes 400 ohm of series resistance and switching transients, the receiving amplifier should have sufficiently high input impedance and bandwidth. Fault conditions should also be checked with the device disabled so that unused inputs cannot create unintended loading or signal transitions.
This product page combines manufacturer specifications, package information, functional context, replacement guidance, and application-oriented design guidance. It helps engineers evaluate the MAX338EEE+T against same-package family options while accounting for channel configuration, on-resistance, leakage, and control-interface compatibility.
直接替换替代料： MAX338EEE+T ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
MAX328EEE+T
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
MAX329EEE+T
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
MAX339EEE+T
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
MAX338EEE+T 规格参数
| Multiplexer Configuration | 8:1 single-ended |
| Number of Channels | 8 channels |
| On-Resistance | 400 ohm |
| Off-State Leakage | 20 pA |
| Single-Supply Voltage Range | +4.5 V to +30 V |
| Dual-Supply Voltage Range | ±4.5 V to ±20 V |
| Control Input Logic Compatibility | TTL compatible |
| Control Input Voltage Range | +0.8 V to +2.4 V |
| Process Technology | 44 V silicon-gate CMOS |
| Temperature Grade | Industrial |
| Switching Time | 500 ns |
| Channel Count Configuration | 8-channel mux or dual 4-channel mux |
| Package Type | 16-pin SSOP |
| Package Dimensions | 3.90 mm width |
| 安装类型 | Surface mount |
MAX338EEE+T 3.90 mm width 引脚配置指南
MAX338EEE+T（3.90 mm width 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： MAX338EEE+T.
请参阅 数据手册 以查看完整引脚配置。
典型应用
MAX338EEE+T 适用于 6 应用s: Automated Test Equipment, Industrial Sensor Multiplexing, Data-Acquisition Systems, Medical Instrument Signal Routing, Communications Interface Routing, Programmable Test and Measurement.
Automated Test Equipment
The MAX338EEE+T fits automated test systems that must connect one of eight measured nodes to a common instrument input. Its 8:1 organization reduces the number of physical connections, while 400 ohm on-resistance and 20 pA leakage help preserve the behavior of high-impedance sources. TTL-compatible address and enable inputs simplify connection to digital test controllers. Designers should include the switched resistance in calibration and confirm that the selected signal remains within the device's single- or dual-supply operating limits.
推荐
Industrial Sensor Multiplexing
The MAX338EEE+T can route eight industrial sensor outputs into one shared amplifier or converter channel. The 8:1 configuration is useful for pressure, temperature, and position monitoring systems where each sensor requires a separate acquisition path. Its industrial temperature grade supports factory equipment, and 20 pA leakage is beneficial when measuring high source impedances. The receiving amplifier must present high input impedance, while PCB traces should remain short and shielded from motor-control and switching-power nodes.
推荐
Data-Acquisition Systems
The MAX338EEE+T is suitable for compact data-acquisition systems that sample several analog channels through a common input. The 500 ns switching time supports reasonably fast channel selection, while 20 pA leakage limits leakage error in high-impedance sources. Designers can use the common output to feed an ADC, comparator, or instrumentation amplifier and control channel selection with address and enable logic. Account for the 400 ohm series resistance, amplifier settling time, and acquisition time when defining the sampling rate.
推荐
Medical Instrument Signal Routing
The MAX338EEE+T can select low-level analog inputs in medical instruments when the system architecture requires multiple sensor connections to a common processing channel. Its 20 pA leakage is favorable for high-impedance sources, and the 16-pin SSOP package supports compact board layouts. Leakage and charge injection must be evaluated against the signal bandwidth and electrode or sensor impedance. The power architecture should keep analog and digital return currents separate and follow the manufacturer's bypass-capacitor recommendations.
推荐
Communications Interface Routing
The MAX338EEE+T can route multiple communication-line impedances or monitoring taps into one shared receiver within a multi-channel interface board. Its wide single- and dual-supply operating ranges support equipment using different rail arrangements, while TTL-compatible control inputs simplify digital control. Because 400 ohm of on-resistance can affect high-speed or high-current interfaces, the designer should calculate channel loss and verify timing against the selected protocol. The device is better suited to moderate-bandwidth routing than to low-resistance RF switching.
推荐
Programmable Test and Measurement
The MAX338EEE+T supports programmable test and measurement systems in which address logic selects one of several external or internal stimulus paths. Its 8:1 multiplexing reduces wiring complexity, and its dual-supply capability permits bipolar signal routing when required by the measurement interface. For accurate results, characterize the selected path's 400 ohm resistance and switching transient, then include those effects in the test fixture model. Keep enable control deterministic so unused channels cannot influence a measurement sequence.
推荐
推荐产品汇总
工程参考数据： MAX338EEE+T ——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 | MAX328EEE+T | MAX329EEE+T | MAX339EEE+T |
|---|---|---|---|---|
| Brand | Maxim Integrated | Maxim Integrated | Maxim Integrated | Maxim Integrated |
| Package | 16-pin SSOP | 16-pin SSOP | 16-pin SSOP | 16-pin SSOP |
关键差异点
- Eight-to-one multiplexing in one package （对比 MAX339EEE+T)
- Lower on-resistance within the MAX328/MAX329 trade-off （对比 MAX328EEE+T)
- Higher on-resistance than the MAX328/MAX329 family （对比 MAX329EEE+T)
设计说明
Include the 400 ohm on-resistance in the signal-path calculation and verify that the receiving amplifier has enough input impedance and bandwidth. A high source impedance combined with 400 ohm can produce substantial attenuation or an RC pole. For precision measurements, calibrate the selected path and allow the downstream amplifier to settle after the address and enable lines change.
Assign every connection from the 16-pin SSOP pin-description table in the manufacturer datasheet. Keep the common analog path short, place bypass capacitance at the supply pins, and maintain a continuous ground reference beneath the device. Route high-impedance source traces away from clocks, relay contacts, inductors, and switching-regulator nodes to reduce leakage-induced errors and switching transients.
Do not treat a shared SSOP package as proof of unconditional interchangeability. MAX328EEE+T and MAX329EEE+T differ in on-resistance, leakage, and charge injection, while MAX339EEE+T changes the channel organization. Compare supply limits, address decoding, enable polarity, settling behavior, and absolute maximum ratings before approving a replacement.
合规信息
The device is identified as an industrial-grade product. Specific RoHS, REACH, lead-free, halogen-free, and conflict-minerals statements require confirmation from the manufacturer product documentation.
