MAX3389ECUG+ - 2.5V 3/2 RS-232 Transceiver | ADI
N.º da peça: MAX3389ECUG+ ✓ AtivoMAX3389ECUG+ Visão geral
An RS-232 transceiver is an interface IC that converts logic-level signals between a host or controller and a cable-based RS-232 link. The MAX3389ECUG+ combines three transmit channels with two receive channels in one package. This mixed 3/2 configuration allows one controller to command three external targets while receiving status or data from two of them, reducing the number of separate interface components required in portable equipment.
The primary electrical features are the 2.5V operating supply, a specified 2.35V to 3V transceiver supply range, and ±15kV ESD protection. These characteristics make the device suitable for systems in which connector exposure, limited battery energy, and restricted board area are important design constraints. The enhanced ESD protection helps improve interface robustness when users connect external cables to personal digital assistants, mobile phones, and other handheld communications products.
The MAX3389 family implements the electrical signaling required by EIA/TIA-232 and V.28/V.24 interfaces. Driver channels convert TTL-compatible command signals into RS-232 levels, while receiver channels recover RS-232 data as logic-level signals. The integrated multi-channel arrangement also reduces the number of package outlines and PCB land patterns that a design team otherwise needs to manage for several independent serial ports.
Typical uses include personal digital assistant connectivity, mobile phone accessories, handheld test equipment, point-of-sale terminals, and compact industrial controllers. The low 2.5V supply requirement allows the interface to operate alongside low-voltage logic, while the TSSOP-24 package supports compact board layouts. Product qualification, ordering, and lifecycle requests can be handled through the Request a Quote form on this page.
The primary design consideration is external-signal handling. Although the device has enhanced ESD protection, the board still needs a suitable return path, controlled cable routing, and connector placement that minimizes ESD exposure. Power and signal integrity should be evaluated together because the RS-232 drivers and receivers operate at a higher voltage domain than many modern low-voltage host controllers.
This page combines the identified electrical ratings, package information, application context, comparison parameters, and practical design guidance into one engineering reference. It also distinguishes exact drop-in candidates from related interface families and highlights which characteristics must still be confirmed in the manufacturer datasheet before a substitution is released to production.
Alternativas drop-in para MAX3389ECUG+ — mesmo encapsulamento, compatível pino a pino. Peças de encapsulamento diferente que exigem retrabalho na PCB são excluídas.
Variantes desta série
Modelos da mesma série compatíveis como drop-in com MAX3389ECUG+ (mesmo formato e footprint) — diferindo em Package.
MAX3389ECUG+T
✅ Drop-InConsulte o preço
Ver ficha técnica →MAX3389E
✅ Drop-In ⚠️ Especificações não verificadas📋 Alternativa de referência (fora do catálogo)
MAX3388E
✅ Drop-In ⚠️ Especificações não verificadas📋 Alternativa de referência (fora do catálogo)
MAX3386E
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
MAX3387EEUG+
✅ Drop-InConsulte o preço
Ver ficha técnica →MAX3389ECUG+ Especificações
| Product Type | RS-232 transceiver |
| Driver Channel Count | 3 channels |
| Receiver Channel Count | 2 channels |
| Interface Standard | EIA/TIA-232 and V.28/V.24 |
| Nominal Supply Voltage | 2.5 V |
| Transceiver Supply Range | 2.35 V to 3 V |
| ESD Protection | ±15 kV |
| Encapsulamento | 24-pin TSSOP |
| Package Body Width | 4.4 mm |
| Package Pitch | 0.65 mm |
| Tipo de montagem | Surface mount |
| Primary Application | Personal digital assistants and mobile phones |
Guia de Configuração de Pinos do MAX3389ECUG+ 0.65 mm
Configuração de pinos para MAX3389ECUG+ (pacote 0.65 mm). A numeração dos pinos, funções e diagramas de conexão estão definidos no datasheet do fabricante. Consulte-o para o footprint exato e diretrizes de soldagem.
Nenhum dado detalhado de pinagem disponível para MAX3389ECUG+.
Consulte a ficha técnica para a configuração completa dos pinos.
Aplicações típicas
MAX3389ECUG+ é adequado para 6 aplicaçãos: Personal Digital Assistant Connectivity, Mobile Phone Accessory Interface, Handheld Test and Measurement Equipment, Point-of-Sale Terminal, Compact Industrial Controller, Portable Data Terminal.
Personal Digital Assistant Connectivity
The MAX3389ECUG+ fits personal digital assistant connectivity because it combines three RS-232 transmit channels and two receive channels in a single 24-pin TSSOP. Its nominal 2.5V operation and specified 2.35V-to-3V supply range reduce the number of level-shift and interface sections required around a low-voltage handheld controller. The manufacturer identifies personal digital assistants as a target application for this family. Use the device where the host must command three accessories while monitoring two return paths. Its ±15kV ESD protection improves robustness at an external accessory connector, although the board still needs an effective chassis or signal-ground return and careful connector routing.
Recomendado
Mobile Phone Accessory Interface
The MAX3389ECUG+ is suitable for a mobile phone accessory interface when the system needs several outbound command paths and fewer inbound data paths. Its three drivers and two receivers match the asymmetric 3/2 arrangement associated with accessory-control equipment, while operation from a 2.35V-to-3V rail supports low-power portable architectures. The ±15kV ESD rating is valuable when a cable or connector is exposed to user contact. Designers should preserve the RS-232 signal ground, position the interface close to the connector, and use controlled return wiring to reduce susceptibility to ESD and cable-induced transients.
Recomendado
Handheld Test and Measurement Equipment
The MAX3389ECUG+ can support compact test equipment that needs a multi-channel RS-232 control and status interface. Three drivers permit commands to separate fixtures or instruments, while two receivers collect status from selected devices. The 24-pin TSSOP package limits board area, and the 2.5V nominal supply supports integration with low-voltage control logic. Because RS-232 uses signal levels above the logic domain, the interface must connect to the host through the appropriate data and ground paths rather than directly to general-purpose I/O. Confirm the manufacturer’s pin descriptions and device-level supply arrangement before routing connector signals.
Recomendado
Point-of-Sale Terminal
The MAX3389ECUG+ is well suited to point-of-sale terminal designs that connect several peripherals while keeping board area and power consumption low. Three RS-232 outputs can address a printer, scanner, or customer-display device, while two receive channels support returned status from selected equipment. Its 2.35V-to-3V supply range is compatible with compact embedded systems, and the ±15kV ESD protection improves connector survivability in retail environments. Place transient-energy control and grounding near the user-accessible connector, and follow the manufacturer’s channel-enable and power-up guidance to prevent unwanted activity during system startup.
Recomendado
Compact Industrial Controller
The MAX3389ECUG+ can serve as the serial communications section of a compact industrial controller that must distribute commands and receive limited status information. The mixed three-driver, two-receiver topology avoids duplicating a complete transceiver for every channel, while the TSSOP-24 package supports dense board construction. The device’s 2.5V operating point allows integration with compatible modern control logic, and its enhanced ±15kV ESD protection is valuable near equipment connectors. The controller designer should still provide a stable supply, continuous signal ground, controlled impedance paths, and clear separation between external cable routing and sensitive internal circuitry.
Recomendado
Portable Data Terminal
The MAX3389ECUG+ fits portable data terminals that require multiple RS-232 links without allocating separate interface chips for every direction. The device combines three drivers and two receivers, uses a low 2.35V-to-3V transceiver supply range, and fits a compact TSSOP-24 outline. This arrangement is useful for terminals that send commands or identification data to several accessories while monitoring responses from a smaller number of devices. The ±15kV ESD protection supports connector reliability, but product-level compliance still depends on the complete cable, connector, enclosure, and grounding design rather than the IC rating alone.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para MAX3389ECUG+ — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | MAX3389ECUG+T | MAX3389E | MAX3388E | MAX3386E | MAX3387E |
|---|---|---|---|---|---|---|
| Package | TSSOP-24 | TSSOP-24 | TSSOP-24 | TSSOP-24 | TSSOP-24 | TSSOP-24 |
| Brand | Maxim Integrated | Maxim Integrated | Maxim Integrated | Maxim Integrated | Maxim Integrated | Maxim Integrated |
| Product Type | RS-232 transceiver | RS-232 transceiver | RS-232 transceiver | RS-232 transceiver | RS-232 transceiver | RS-232 transceiver |
| Primary Applications | PDAs, mobile phones and low-power communications equipment | PDAs, mobile phones and low-power communications equipment | PDAs, mobile phones and low-power communications equipment | PDAs and mobile phones | RS-232 communications equipment | RS-232 communications equipment |
Principais diferenciais
- Three transmit channels support multiple outbound commands (vs MAX3386E)
- Low-voltage operation supports portable systems (vs MAX3387E)
- Enhanced external-interface ESD protection (vs MAX3388E)
Notas de projeto
Route each external RS-232 line as a differential class relative to its signal-ground reference, keep driver outputs away from receiver inputs, and avoid sharing narrow traces with unrelated switching-current paths. Place the MAX3389ECUG+ close to the connector when practical so ESD current is diverted through the designated protection and ground structure instead of crossing sensitive board areas.
Do not assume every MAX3388E, MAX3389E, MAX3386E, or MAX3387E ordering code is interchangeable. Verify the exact driver/receiver counts, enable pins, supply limits, and package drawing in the manufacturer pin-description tables. The MAX3389ECUG+ is a 3/2-channel device in a TSSOP-24 package, so even a family-level similarity does not by itself prove board-level compatibility.
RS-232 driver edges can couple into nearby circuitry even when the data rate is modest. Maintain separation between external cable traces and sensitive analog or high-speed digital paths, use a continuous signal-ground reference, and place any required filtering close to the connector. Validate the completed arrangement with an oscilloscope because changing connector cables or enclosure grounding can materially affect observed transients.
Use a stable 2.35V-to-3V supply for the transceiver section and follow the manufacturer’s connection requirements for charge-pump and power-management elements. Keep high-current return paths out of the signal-ground trace beneath the package. Verify startup, enable sequencing, and input behavior across the intended supply range before production release, particularly in systems that share the rail with a low-voltage host controller.
Informações de conformidade
The MAX3389ECUG+ order suffix indicates a lead-free package option, but separate RoHS, REACH, halogen-free, and conflict-minerals statements were not identified. This is an interface IC rather than an automotive-qualified device, so AEC-Q100 is recorded as not_applicable.