MAX3387ECUG+ - 3V 250kbps RS-232 Transceiver | Analog Devices
Référence : MAX3387ECUG+ ✓ ActifMAX3387ECUG+ Présentation
An RS-232 transceiver is an interface IC that converts between logic-level signals and the voltage-defined bipolar signals used by RS-232 equipment. It belongs to the transceiver and line-driver/receiver hierarchy within interface ICs, bridging portable processors, cellular equipment, industrial controllers, and legacy serial ports while adding level conversion and electrostatic-discharge protection.
The MAX3387E family provides three driver channels and three receiver channels, allowing three RS-232 links to be implemented in a compact design. Its low-dropout transmitter output stage is intended to preserve compliant RS-232 output levels with a supply as high as 5.5V. The manufacturer describes the device for low-power requirements, high data-rate capability, and enhanced ESD protection, with stated ±15kV protection for the MAX3387ECUG+.
Its dual charge-pump architecture generates the positive and negative transmitter voltages required by RS-232 while operating from a single low-voltage supply. Four small 0.1uF charge-pump capacitors are sufficient for 3.3V operation according to the manufacturer documentation. The AutoShutdown Plus feature is intended to reduce power consumption when the interface is not active, making the part suitable for battery-powered and portable systems.
Typical applications include RS-232 links in PDAs, cellular phones, data acquisition equipment, industrial controllers, point-of-sale terminals, and portable diagnostic instruments. The three-transmitter and three-receiver organization is useful where a board must expose multiple serial channels while conserving space and avoiding separate level-conversion ICs.
Design should place the charge-pump capacitors close to their designated pins and route each RS-232 driver output with controlled return-path geometry. External protection may still be required for long cables or severe industrial environments, and system designers should confirm logic levels, shutdown behavior, receiver enable timing, and line-driver loading against their system requirements.
This page organizes the principal electrical characteristics, package information, verified sourcing references, compatible family options, and practical interface-design considerations into a consolidated guide for engineers evaluating the MAX3387ECUG+.
Alternatives de remplacement direct pour MAX3387ECUG+ — 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 MAX3387ECUG+ (même facteur de forme et même empreinte) — différant par Package.
MAX3387EEUG+
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Voir la fiche technique →MAX3387ECUG+ Spécifications
| Transceiver Configuration | 3 transmitters and 3 receivers |
| Supply Voltage Range | 3 V to 5.5 V |
| Nominal Supply Voltage | 3.3 V |
| Maximum Data Rate | 250 kbps |
| Communications Standard | EIA/TIA-232 and V.28/V.24 |
| ESD Protection | ±15 kV |
| Charge-Pump Capacitor Count | 4 capacitors |
| Charge-Pump Capacitance | 0.1 uF each |
| Boîtier | 24-pin TSSOP |
| Type de montage | Surface mount |
| Power Architecture | Dual charge pump |
| Transmitter Output Stage | Proprietary low-dropout design |
| Power Management Feature | AutoShutdown Plus |
Guide de configuration des broches du MAX3387ECUG+ 24-pin tssop
Configuration des broches du MAX3387ECUG+ (boîtier 24-pin tssop). 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 MAX3387ECUG+.
Consultez la fiche technique pour la configuration complète des broches.
Applications typiques
MAX3387ECUG+ convient pour 6 applications: Portable Data Terminals, Cellular and Wireless Equipment, Industrial Data Acquisition, Point-of-Sale Terminals, Portable Diagnostic Instruments, RS-232 Test and Measurement.
Portable Data Terminals
The MAX3387ECUG+ fits portable data terminals that need several legacy RS-232 ports while operating from a low-voltage battery-regulated rail. Its three transmitters and three receivers consolidate multiple interface channels into one 24-pin TSSOP device, while its 3 V to 5.5 V operating range supports 3.3 V systems. The AutoShutdown Plus function can reduce consumption when the interface is inactive, making power-state behavior important during duty-cycle design. The manufacturer identifies PDAs and cellular phones as suitable equipment categories. Designers should still verify shutdown timing, external cable protection, and the charge-pump capacitor placement prescribed by the MAX3387E datasheet.
Recommandé
Cellular and Wireless Equipment
The MAX3387ECUG+ is appropriate for cellular and wireless equipment requiring a compact RS-232 interface at 3 V or above. The manufacturer describes enhanced ESD protection and identifies PDAs and cell phones as target applications, where connectors and cables can expose the system to electrostatic discharge. Three RS-232 transmitter/receiver channels support multi-port diagnostic or accessory connections without requiring three separate transceiver packages. Operation to 250 kbps covers typical legacy control links, although the chosen baud rate must remain consistent with receiver and cable characteristics. Board layout should keep the four 0.1 uF charge-pump capacitors short and provide an uninterrupted ground path for low-noise signal return.
Recommandé
Industrial Data Acquisition
The MAX3387ECUG+ supports industrial data-acquisition equipment that connects a low-voltage controller to RS-232 instruments. Three transmitters and three receivers allow several instruments or control paths to share a single package, reducing component count while maintaining the voltage conversion required by RS-232. The 250 kbps maximum rate is useful for moderate-speed command and measurement traffic, but long cables and electrically noisy industrial environments may require additional surge and ESD protection. The interface logic must also tolerate the electrical state of connected equipment during startup and shutdown. Use the manufacturer application information as the basis for connector protection, grounding, and cable-routing decisions.
Recommandé
Point-of-Sale Terminals
Point-of-sale terminals can use the MAX3387ECUG+ when they need several RS-232 connections for peripherals such as scales, printers, or magnetic-stripe equipment. The 3 V to 5.5 V supply range accommodates compact systems built around 3.3 V logic, while the three-driver, three-receiver configuration provides flexible channel assignment. Data rates up to 250 kbps are appropriate for many peripheral-control protocols. Designers should determine which receiver-enable and shutdown states are required during idle periods, because peripheral cables may retain signals when the transceiver enters a low-power state. External protection should be selected according to connector exposure and cable length rather than assuming the internal ESD rating eliminates every system risk.
Recommandé
Portable Diagnostic Instruments
The MAX3387ECUG+ is well suited to portable diagnostic instruments that communicate with legacy RS-232 equipment from a 3.3 V platform. The low-voltage operation reduces the power burden associated with a line-powered interface, while the integrated dual charge pump supplies the bipolar levels required by true RS-232 rather than limited-voltage TTL signaling. Three channels can support multiple instruments, service interfaces, or configuration ports. A maximum rate of 250 kbps provides ample margin for common diagnostic commands. Firmware should avoid relying on receiver states that are not explicitly controlled, and PCB placement should separate sensitive receiver routing from switching supplies and high-current return paths.
Recommandé
RS-232 Test and Measurement
The MAX3387ECUG+ can be used in test and measurement equipment that needs to present standard RS-232 levels to external analyzers, fixtures, or legacy controllers. Its three transmitters and three receivers allow several instruments to share a compact board, while operation up to 250 kbps covers many control and legacy communication formats. The dual charge pump maintains bipolar transmitter levels from the low-voltage supply, simplifying system power architecture compared with a discrete high-voltage driver design. Test-equipment developers should budget external protection for long exposed leads and verify logic thresholds, receiver enable polarity, and shutdown timing in the completed fixture. The 24-pin TSSOP footprint supports conventional reflow assembly and automated inspection.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour MAX3387ECUG+ — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | MAX3387EEUG+ |
|---|---|---|
| Package | TSSOP-24 | TSSOP-24 |
| Brand | Analog Devices | Analog Devices |
| Transmitter Count | 3 | 3 |
| Receiver Count | 3 | 3 |
| Supply Voltage | 3 V to 5.5 V | 3 V |
| Maximum Data Rate | 250 kbps | 250 kbps |
| Communications Standard | EIA/TIA-232 and V.28/V.24 | RS-232 |
Principaux différenciateurs
- Three RS-232 channels in one low-voltage transceiver (vs MAX3387EEUG+)
- Documented ±15 kV ESD protection for the target ordering code (vs MAX3387EEUG+)
- Low-voltage RS-232 operation without a separate high-voltage supply (vs MAX3387EEUG+)
Notes de conception
Place the four 0.1 uF charge-pump capacitors immediately beside their associated IC pins, with short and symmetrical connections as shown in the manufacturer datasheet. Keep the loop area small to limit switching transients and coupling into receiver inputs. Route the three RS-232 driver outputs away from sensitive receiver traces and place any connector-side protection devices near the connector rather than beside the transceiver.
Assign the logic-side ground and RS-232 driver-return paths deliberately. Although RS-232 uses bipolar signaling, the receiver still depends on a clean reference and the transceiver contains a charge pump that can generate switching energy. Maintain a continuous ground plane, avoid splitting it beneath the device, and keep high-current return paths from passing through the interface area. This reduces susceptibility to noise and prevents unstable receiver thresholds.
Do not treat the MAX3387ECUG+ as a TTL-level UART driver. It generates the positive and negative voltages required by RS-232, while the logic-side signals use the supply-referenced CMOS levels. Also do not assume that internal ±15 kV ESD protection removes the need for connector protection on long or industrial cables. Validate receiver-enable and AutoShutdown Plus behavior so connected equipment is not exposed to unexpected high-impedance states.
Informations de conformité
The manufacturer material describes low power, high data rate, and enhanced ESD protection, but it does not explicitly state the requested compliance status in the available product information.