MAX211EAI+ - 120kbps 4/5 RS-232 Transceiver | Analog Devices
N.º da peça: MAX211EAI+ ✓ AtivoMAX211EAI+ Visão geral
An RS-232 transceiver is an interface IC that converts logic-level signals between a host controller and a cable-based serial link. The MAX211 family combines drivers, receivers, and voltage-conversion circuitry into a single interface device. It belongs to the interface IC hierarchy and allows a +5 V system to communicate through RS-232 without requiring separate negative supply rails or external line-driver ICs.
The MAX211EAI+ supports EIA/TIA-232E and CCITT V.28 operation at data rates up to 120 kbps when loaded according to the cited standards. Its four drivers maintain approximately plus or minus 5 V EIA/TIA-232E output levels, while the five receivers support the logic-side receive function. Four external 0.1 uF charge-pump capacitors allow operation from a single +5 V supply.
The integrated dual charge-pump architecture generates the voltage required by the RS-232 line drivers and reduces the number of external supply rails required by the design. The MAX211EAI+ is packaged in the 28-pin SSOP package, identified as EAI in the ordering code. This package provides a compact option for industrial and communication equipment where board area is constrained but a conventional through-hole RS-232 package is unnecessary.
Typical uses include industrial serial controllers, instrumentation, POS terminals, data-acquisition equipment, and embedded systems that require a +5 V RS-232 port. The 120 kbps capability is suitable for moderate-speed asynchronous serial communication, while the integrated drivers and receivers reduce the component count compared with separate transmitter and receiver devices.
PCB design must reserve the four specified 0.1 uF capacitors and maintain the charge-pump routing recommended by the manufacturer datasheet. Keep high-current charge-pump loops compact, provide an uninterrupted ground plane, and place interface protection close to the connector because external cables can introduce ESD and surge events.
This page combines verified manufacturer information, distributor availability, family-level drop-in guidance, package details, and practical PCB design considerations to help engineers evaluate the MAX211EAI+ for compact +5 V RS-232 interface designs.
Alternativas drop-in para MAX211EAI+ — 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 MAX211EAI+ (mesmo formato e footprint) — diferindo em External Charge-Pump Capacitors, Package.
MAX211CAI+
✅ Drop-InConsulte o preço
Ver ficha técnica →MAX211ECAI+
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
MAX241EAI+
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
MAX211EAI+ Especificações
| Product Type | RS-232 / V.28 transceiver |
| Number of Drivers | 4 |
| Number of Receivers | 5 |
| Maximum Data Rate | 120 kbps |
| Tensão de alimentação | +5 V |
| External Charge-Pump Capacitors | 4 x 0.1 uF |
| Driver Output Signal Level | plus or minus 5 V EIA/TIA-232E |
| Charge-Pump Architecture | Dual charge pump |
| Supported Interface Standards | EIA/TIA-232E and CCITT V.28 |
| Encapsulamento | 28-pin SSOP |
| Tipo de montagem | Surface Mount |
| Status RoHS | unknown |
| REACH Status | unknown |
| Lead-Free Status | unknown |
Guia de Configuração de Pinos do MAX211EAI+ 28-pin ssop
Configuração de pinos para MAX211EAI+ (pacote 28-pin ssop). 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 MAX211EAI+.
Consulte a ficha técnica para a configuração completa dos pinos.
Aplicações típicas
MAX211EAI+ é adequado para 6 aplicaçãos: Industrial Serial Controller Interface, Data-Acquisition Equipment, Point-of-Sale Terminal, Instrumentation and Test Equipment, Embedded RS-232 Communication, Communication Port Expansion.
Industrial Serial Controller Interface
The MAX211EAI+ fits an industrial controller that must expose an RS-232 port from a +5 V logic supply. Its four line drivers, five line receivers, and support for rates up to 120 kbps suit conventional asynchronous command and telemetry links. The integrated dual charge pump removes the need for a separate negative supply, while four external 0.1 uF capacitors simplify the power architecture. The main design check is the exact operating-temperature grade, which is not stated in the supplied data and must be confirmed against the enclosure environment.
Recomendado
Data-Acquisition Equipment
The MAX211EAI+ can connect a data-acquisition controller to a legacy RS-232 instrument because it combines four transmitters, five receivers, and single +5 V charge-pump operation in one 28-pin SSOP. Operation up to 120 kbps is appropriate for instrument configuration and measurement-data transfers that do not require modern high-speed serial protocols. Use the manufacturer's recommended capacitor and charge-pump layout, and place any connector-side protection close to the cable entry because external serial cables are exposed to ESD events.
Recomendado
Point-of-Sale Terminal
The MAX211EAI+ is appropriate for a point-of-sale terminal needing a compact legacy peripheral interface. A +5 V system can use the integrated charge pump rather than allocating space for negative-rail generation, and the 28-pin SSOP preserves board area compared with larger conventional packages. Four drivers allow multiple outbound signal paths, while the receiver count supports inbound peripheral data. The design should verify the exact temperature range, provide a solid ground plane, and route the four 0.1 uF charge-pump capacitors as directed by the manufacturer datasheet.
Recomendado
Instrumentation and Test Equipment
The MAX211EAI+ can provide the legacy communications port found on programmable instruments, bench meters, and laboratory controllers. Its verified support for EIA/TIA-232E and CCITT V.28 at up to 120 kbps matches conventional RS-232 equipment, and the integrated drivers and receivers reduce the number of discrete interface components. A practical benefit is single +5 V operation, while the trade-off is the need to reserve PCB area for four external 0.1 uF capacitors and verify every connector-side surge-protection component.
Recomendado
Embedded RS-232 Communication
The MAX211EAI+ suits embedded equipment that must bridge a +5 V UART to an RS-232 connector. The four-driver, five-receiver arrangement supports several RS-232 lines, and the 120 kbps capability covers standard asynchronous serial links. Its 28-pin SSOP package is useful in compact embedded assemblies, while the integrated dual charge pump simplifies power conversion. Engineers should avoid inferring modern UART logic levels from the RS-232 line levels, confirm ground continuity, and preserve the manufacturer's recommended charge-pump layout.
Recomendado
Communication Port Expansion
The MAX211EAI+ can expand a base controller's available RS-232 lines because it includes four drivers and five receivers in one package. This is useful where a controller needs more than one peripheral connection or requires separate transmit and receive signal assignments. The single +5 V architecture and 120 kbps operation align with conventional RS-232 equipment, but cable routing and grounding remain critical. Keep the charge-pump section compact, maintain a continuous ground reference, and verify the official 28-pin pinout before assigning additional serial lines.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para MAX211EAI+ — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | MAX211CAI+ | MAX211ECAI+ | MAX241EAI+ |
|---|---|---|---|---|
| Package | 28-pin SSOP | 28-pin SSOP | 28-pin SSOP | 28-pin SSOP |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Product Type | RS-232 / V.28 transceiver | RS-232 transceiver | RS-232 transceiver | RS-232 transceiver |
Principais diferenciais
- Exact 120 kbps MAX211E family positioning (vs MAX241EAI+)
- Single +5 V supply with integrated dual charge pump (vs MAX211CAI+)
- Four-driver and five-receiver integration (vs MAX211ECAI+)
Notas de projeto
Follow the manufacturer's charge-pump capacitor placement exactly. The MAX211EAI+ requires four external 0.1 uF capacitors, and their locations can affect charge-pump behavior and EMI. Place the capacitors close to their designated pins, use short ground returns, avoid routing charge-pump current through sensitive signal paths, and keep the serial-line traces away from the compact switching-current loop.
Treat the RS-232 cable connector as an EMI entry point. Connect the transceiver ground to the board ground through a low-impedance return, place any transient-protection network at the connector, and avoid long unprotected traces. The MAX211EAI+ supports data rates up to 120 kbps, so rise-time control and clean grounding remain important even when the logic-side clock is comparatively slow.
Decouple the +5 V supply locally and provide a low-impedance ground plane. Although the transceiver uses an integrated charge pump, the device still requires four external 0.1 uF capacitors. Place bulk supply decoupling near the IC and keep the high-current charge-pump loop compact. Confirm the device's absolute maximum and recommended supply limits in the official manufacturer datasheet before applying power.
Do not assume that every similarly packaged RS-232 transceiver is automatically interchangeable. MAX211CAI+ and MAX211ECAI+ are strong same-family candidates, but ordering suffixes can encode grade, temperature, or lifecycle differences. Compare the numbered SSOP-28 pinout, enable or shutdown behavior, electrical limits, temperature range, and exposed capacitance requirements against the manufacturer datasheet before releasing a replacement to production.
Informações de conformidade
The supplied manufacturer and distributor snippets do not provide explicit RoHS, REACH, lead-free, halogen-free, conflict-minerals, or automotive qualification statements for MAX211EAI+.