MAX338MSE/PR3+ - 8:1 CMOS Multiplexer | Analog Devices
Référence : MAX338MSE/PR3+ ✓ ActifMAX338MSE/PR3+ Présentation
An analog multiplexer is a semiconductor switch that routes one of several physical input channels to a shared signal path. It belongs to the analog switch and multiplexer hierarchy, interface IC category, and broader signal-conditioning system. Unlike a digital multiplexer, its primary purpose is to preserve analog signal integrity while selecting a source for measurement, conversion, instrumentation, or communication circuitry.
The MAX338 family provides eight selectable channels in the MAX338 configuration and uses address logic to determine which input reaches the common output. Its 400 ohm on-resistance is suitable for many medium-impedance sensor and instrumentation nodes. The CMOS implementation, low-leakage characteristic, and analog switching function make the device useful when channel isolation and signal routing matter more than very high bandwidth or very low resistance.
Three address-control bits select one of eight possible input paths. The selected signal can be used in either multiplexing or demultiplexing arrangements, allowing the same device family to support measurement systems, signal-distribution networks, and test systems. The exact electrical limits, address timing, channel characteristics, supply requirements, and operating-temperature limits must be confirmed in the Analog Devices MAX338 manufacturer data sheet before finalizing a circuit.
Typical uses include multiplexing resistive sensor outputs into an analog-to-digital converter, selecting instrumentation channels, routing multiple test points through a shared measurement chain, and building compact signal-distribution systems. These applications benefit from the dedicated 8:1 topology and the low-leakage CMOS design. Designs requiring substantially lower on-resistance, faster switching, higher voltage operation, or differential channel handling may need a different multiplexer family.
When laying out a board, route the eight analog inputs and common output as short, guarded traces, place the device close to the sensing circuitry, and keep digital address lines away from sensitive analog paths. Confirm the package pin arrangement and the manufacturer’s grounding and supply recommendations on the official data sheet. Do not infer pin functions from another MAX338 package or ordering code without checking the exact pin description table.
This product summary combines the official MAX338 family description, package and routing information, temperature-code context, and application-focused engineering guidance. It also identifies the package-compatible alternatives that can be evaluated without changing the PCB footprint and highlights the principal trade-offs between low-leakage multiplexing, switching resistance, and system flexibility.
Alternatives de remplacement direct pour MAX338MSE/PR3+ — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
Variantes de cette série
Modèles de la même série directement compatibles avec MAX338MSE/PR3+ (même facteur de forme et même empreinte) — différant par Multiplexer Configuration, Package, Address Control.
MAX338ESE+T
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Voir la fiche technique →MAX338MSE/PR3+ Spécifications
| Multiplexer Configuration | Single 8:1 |
| Number of Channels | 8 channels |
| Address Control | 3-bit binary address |
| On-Resistance | 400 ohm |
| Technology | CMOS |
| Leakage Characteristic | Low leakage |
| Operating Function | Multiplexer or demultiplexer |
| Number of Circuits | 1 circuit |
| Boîtier | 16-pin SOIC |
| Package Body Width | 3.90 mm |
| Type de montage | Surface mount |
| Shipping Form | Tube |
Guide de configuration des broches du MAX338MSE/PR3+ 3.90 mm
Configuration des broches du MAX338MSE/PR3+ (boîtier 3.90 mm). La numérotation des broches, les fonctions et les schémas de connexion sont définis dans la fiche technique du fabricant. Consultez-la pour l'empreinte exacte et les directives de soudage.
Aucune donnée de brochage détaillée disponible pour MAX338MSE/PR3+.
Consultez la fiche technique pour la configuration complète des broches.
Applications typiques
MAX338MSE/PR3+ convient pour 6 applications: Resistive Sensor Multiplexing, Analog-to-Digital Converter Channel Selection, Laboratory Test-Point Selection, Instrumentation Signal Distribution, Automotive Sensor Node Routing, Data Acquisition Signal Multiplexing.
Resistive Sensor Multiplexing
The MAX338MSE/PR3+ can route one of eight resistive sensor branches to a shared measurement channel. Its single 8:1 architecture, 3-bit binary address, and 400 ohm on-resistance make it practical for thermistors, potentiometers, and resistive dividers that feed an analog-to-digital converter. Place the multiplexer close to the sensor junctions to minimize pickup on the long analog traces. Account for the 400 ohm switch resistance when calculating divider ratios and measurement error. Confirm the device’s exact leakage, settling-time, and supply limits in the manufacturer data sheet for the selected sensor impedance and conversion rate.
Recommandé
Analog-to-Digital Converter Channel Selection
Use the MAX338MSE/PR3+ when an ADC must sample from one of eight analog inputs without duplicating its front end. The 8:1 configuration reduces analog routing complexity while the low-leakage CMOS design limits unwanted coupling from unselected channels. The 400 ohm on-resistance should be included in the source-impedance budget for the ADC and the selected front-end network. Verify acquisition time and switching transients against the converter’s input specification. Use short traces and a stable reference and supply arrangement so channel-to-channel measurements remain repeatable.
Recommandé
Laboratory Test-Point Selection
The MAX338MSE/PR3+ can select one of eight test points for a shared oscilloscope, meter, or data-acquisition path. Its 3-bit address simplifies deterministic routing, while low-leakage behavior helps prevent inactive nodes from perturbing the selected measurement. Account for the 400 ohm insertion resistance when probing high-impedance circuits, and keep the common output away from switching-capacitor regulators and fast digital clocks. The same device may also be used in reverse as a demultiplexer for distributing one source to multiple destinations.
Recommandé
Instrumentation Signal Distribution
The MAX338 family can support demultiplexing arrangements in instrumentation systems where one signal must be routed to several destination paths. The MAX338MSE/PR3+ provides eight selectable inputs, a common output, and a 3-bit binary control interface within a compact 16-SOIC footprint. This topology can simplify routing among measurement blocks, although each destination should be checked for loading and isolation. Because the verified 400 ohm on-resistance is meaningful for high-impedance instrumentation, use buffer stages where lower impedance or greater drive is required.
Recommandé
Automotive Sensor Node Routing
The MAX338MSE/PR3+ can select among eight automotive sensor inputs when its exact operating-temperature and automotive qualification requirements are confirmed for the ordering code. The 8:1 topology reduces the number of wiring channels needed between distributed sensing points and a controller, while the 3-bit address provides straightforward digital selection. Keep analog and address traces separated, and protect external vehicle interfaces from transients before they reach the multiplexer. Review the exact suffix, temperature grade, supply range, and qualification status in the manufacturer ordering documentation before production release.
Recommandé
Data Acquisition Signal Multiplexing
The MAX338MSE/PR3+ is useful when eight low-speed analog channels must feed a shared acquisition path. Its low-leakage CMOS characteristic supports clean isolation between inactive branches, and the 400 ohm on-resistance is compatible with many medium-impedance sources. The mux/demux capability also allows designers to reuse the family for controlled signal distribution. Design the acquisition sequence so the converter has sufficient settling time after each address change. Validate leakage, on-resistance variation, and switching behavior across temperature using the exact MAX338 family data sheet.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour MAX338MSE/PR3+ — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | MAX338ESE+T |
|---|---|---|
| Package | 16-SOIC | 16-SOIC - same footprint family |
| Brand | Analog Devices | Analog Devices |
| Multiplexer Configuration | Single 8:1 | Single 8:1 |
| Number of Channels | 8 channels | 8 channels |
| Address Control | 3-bit binary address | 3-bit binary address |
| On-Resistance | 400 ohm | 400 ohm |
| Technology | CMOS | CMOS |
| Operating Function | Multiplexer or demultiplexer | Multiplexer or demultiplexer |
| Shipping Form | Tube | Tape & Reel |
Principaux différenciateurs
- Dedicated eight-channel routing in a standard 16-SOIC footprint (vs MAX338ESE+T)
- Exact ordering-code configuration for controlled procurement (vs MAX338ESE+T)
- Mux and demux capability in one device family (vs MAX338ESE+T)
Notes de conception
Route the eight analog inputs and the common output as short traces, and place the MAX338MSE/PR3+ close to the sensor or acquisition front end. Keep the three address-control traces away from high-impedance analog nodes to reduce capacitive coupling during channel changes. Treat the common output as a sensitive analog route rather than a general-purpose digital bus. A solid ground plane and an uninterrupted return path beneath the package will improve repeatability in precision measurement systems.
Include the 400 ohm on-resistance in the complete source-impedance calculation for each selected channel. If the sensor or ADC front end is high impedance, the switch path can create an RC settling interval after an address change, so allow adequate acquisition time before conversion. Check the MAX338 family data sheet for switch resistance, off leakage, charge injection, and dynamic-characteristic limits, then validate settling with the highest-impedance node and fastest supported sampling sequence.
Do not substitute MAX338ETE+T onto a MAX338MSE/PR3+ board solely because both use 16 leads. The MAX338ETE+T comparison identifies a TQFN-16 exposed-pad package, while the target uses a 16-SOIC footprint. These packages have different land patterns and thermal-pad requirements. Likewise, verify the meaning of the E, SE, MSE, PR3, and + ordering suffixes in the manufacturer ordering table before approving any substitution.
Use a quiet, stable supply for the multiplexer because supply disturbance can appear as measurement error through the selected analog path. Keep the analog ground and digital control return currents separated where the board architecture permits, and place local supply bypassing at the device pins according to the manufacturer data sheet. Confirm the exact supply-voltage range before connecting the device to legacy ±15 V, ±12 V, or single-supply systems because the verified product summary does not state those limits.
Informations de conformité
The verified product results do not state compliance for the exact MAX338MSE/PR3+ ordering code. The production lifecycle applies to the MAX338 family according to the Analog Devices product page.