MAX222IN - 5V Dual RS-232 Interface | Texas Instruments
N.º da peça: MAX222IN ✗ Fim de vidaMAX222IN Visão geral
An RS-232 transceiver is an interface IC that converts logic-level digital signals between a host or controller and a RS-232 communication link. Unlike a differential bus such as RS-485, RS-232 uses single-ended signaling with positive and negative voltage levels. The MAX222IN combines drivers, receivers, and internal level-shift capability in one package, reducing the number of external interface components required in a conventional RS-232 port.
The MAX222IN operates from a 5 V VCC supply and supports data rates up to 200 kbit/s. Its two drivers and two receivers support full-duplex point-to-point communication when connected to the corresponding RS-232 lines. The verified product description also identifies ±15 kV human-body-model ESD protection, low shutdown supply current, and operation over a -40 °C to +85 °C temperature range. These characteristics make the device appropriate for both commercial and industrial equipment.
The MAX222IN is packaged in an 18-pin PDIP, identified by the N package designation in the part number. The through-hole package is appropriate for systems assembled with conventional plated-through-hole components and for prototypes or industrial controllers where through-hole interchangeability is useful. The verified distributor listing identifies the device as a 2/2 full RS-232 transceiver in an 18-PDIP package.
Typical uses include RS-232 ports in test equipment, serial adapters, embedded controllers, industrial instrumentation, and communications equipment. Designers should provide the required charge-pump capacitors, connect the supply and ground correctly, and route the RS-232 connector-side signals away from sensitive low-level circuitry. External protection, grounding, and isolation may be required when the cable is exposed to long, unshielded, or electrically noisy environments.
The product information supplied here combines distributor listings, datasheet search results, and the MAX222 family datasheet link. It distinguishes verified specifications from unavailable parameters and does not infer electrical limits that are not present in the supplied data.
Alternativas drop-in para MAX222IN — mesmo encapsulamento, compatível pino a pino. Peças de encapsulamento diferente que exigem retrabalho na PCB são excluídas.
Nenhuma alternativa drop-in disponível para este produto.
Solicitar alternativasMAX222IN Especificações
| Nenhuma especificação disponível |
Guia de Configuração de Pinos do MAX222IN standard
Configuração de pinos para MAX222IN (pacote standard). 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 MAX222IN.
Consulte a ficha técnica para a configuração completa dos pinos.
Aplicações típicas
MAX222IN é adequado para 6 aplicaçãos: Industrial Serial Controllers, Test and Measurement Equipment, Embedded Data Acquisition, RS-232 Communication Ports, Instrumentation and Control Interfaces, Legacy Through-Hole Equipment.
Industrial Serial Controllers
The MAX222IN fits industrial controllers that need a conventional two-channel RS-232 interface from a single 5 V supply. Its two drivers and two receivers support full-duplex point-to-point communication, while the 200 kbit/s maximum data rate is suitable for control commands, status polling, and configuration traffic. The 18-pin PDIP package is practical for through-hole industrial control boards and prototypes. Designers should use the datasheet charge-pump capacitor arrangement, provide a stable ground reference, and protect the connector-side lines from industrial surge and ESD events.
Recomendado
Test and Measurement Equipment
The MAX222IN is appropriate for RS-232 connections in test equipment where a host computer or controller exchanges commands and measurement data with an instrument. The dual-channel transceiver arrangement can support separate transmit and receive paths, while the verified 200 kbit/s rating covers many low- and moderate-speed serial control protocols. The through-hole PDIP package simplifies insertion into older instrument platforms and laboratory fixtures. Designers should verify the UART logic levels and add cable-side protection for instruments connected to long or exposed RS-232 leads.
Recomendado
Embedded Data Acquisition
The MAX222IN can provide the legacy RS-232 link between an embedded controller and an external data-acquisition module, logger, or service interface. Two receivers allow monitoring or handshake signals, while two drivers support outbound commands and responses. Its single 5 V supply architecture helps integrate the interface into systems that do not generate separate ±12 V rails. The MAX222IN should be placed near the connector-side protection network, with its ground reference tied carefully to the system ground and its external charge-pump capacitors placed according to the manufacturer layout guidance.
Recomendado
RS-232 Communication Ports
The MAX222IN is a direct fit for legacy RS-232 communication ports used by service equipment, configuration tools, and older computer peripherals. The device combines two line drivers and two receivers with internal level-shift functionality in one 18-pin PDIP, reducing the number of discrete interface blocks on the board. Its verified 200 kbit/s capability is suitable for many asynchronous serial links. Engineers should confirm the connector wiring, signal polarity, and logic-level compatibility before enabling the port, because software handshaking and RS-232 voltage levels must match the connected equipment.
Recomendado
Instrumentation and Control Interfaces
The MAX222IN can be used in instrumentation and industrial control interfaces that expose an RS-232 service or configuration connector. The two transmit channels may carry data and control or status signals, while the two receive channels support commands and acknowledgments. The 5 V supply requirement is convenient for embedded controller boards, and the stated ±15 kV human-body-model ESD protection adds useful protection for connector-accessible circuitry. Production designs should still include appropriate cable routing, grounding, and surge protection because the integrated ESD rating does not cover every externally induced event.
Recomendado
Legacy Through-Hole Equipment
The MAX222IN is useful when maintaining or updating legacy equipment built around through-hole RS-232 interfaces. Its 18-pin PDIP package is consistent with older instrument and controller layouts, allowing a direct mechanical comparison during replacement planning. The device provides a 5 V dual RS-232 transceiver configuration and supports operation to 200 kbit/s, making it suitable for established asynchronous links. Before assembly, verify that the replacement exactly matches the original pinout, supply requirements, and external capacitor connections rather than relying only on package similarity.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para MAX222IN — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto |
|---|---|
| Package | 18-pin PDIP |
| Brand | Texas Instruments |
| Supply Voltage | 5 V |
| Data Rate | Up to 200 kbit/s |
| Drivers | 2 |
| Receivers | 2 |
| ESD Protection | ±15 kV human-body model |
| Operating Temperature | -40 °C to +85 °C |
Principais diferenciais
- Single-supply RS-232 interface (vs MAX242EPN+)
- Through-hole package alignment (vs MAX232D)
- Verified interface speed (vs MAX242EPN+)
Notas de projeto
Place the MAX222IN and its external charge-pump capacitors according to the Texas Instruments datasheet reference layout. Keep the RS-232 driver and receiver traces short where practical, provide a continuous ground reference, and separate connector-side signal routing from sensitive logic. The 18-pin PDIP footprint should be checked against the mechanical drawing because package naming alone does not guarantee identical pin spacing or board orientation.
Do not assume that any 18-pin RS-232 DIP is a drop-in replacement. MAX242EPN+ appears in the supplied comparison results as an 18-pin DIP RS-232 device, but the supplied data does not verify identical pin assignments, speed limits, or electrical characteristics. Compare every power, ground, driver, receiver, and enable-related connection against both manufacturer datasheets before substitution.
RS-232 is a single-ended, bipolar interface, so cable routing and grounding strongly affect signal integrity. Keep the connector-side conductors away from clocks, ADC inputs, and sensitive analog nodes, and provide a solid chassis or board-ground strategy at the interface boundary. The verified ±15 kV human-body-model ESD figure should not be treated as a complete industrial surge-protection solution; add appropriate external protection when cables are long or exposed.
Informações de conformidade
The supplied verified data identifies the device as a Texas Instruments RS-232 interface IC but does not state RoHS, REACH, lead-free, halogen-free, conflict-minerals, or automotive qualification status.
