ADM234LJR - 5V CMOS RS-232 Drivers/Receivers | Analog Devices
N.º da peça: ADM234LJR ✓ AtivoADM234LJR Visão geral
Alternativas drop-in para ADM234LJR — 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 ADM234LJR (mesmo formato e footprint) — diferindo em Number of Drivers, Number of Receivers, Package, Product Type.
ADM231LJR
✅ Drop-In ⚠️ Especificações não verificadas📋 Alternativa de referência (fora do catálogo)
ADM232LJR
✅ Drop-In ⚠️ Especificações não verificadasConsulte o preço
Ver ficha técnica →ADM236LJR
✅ Drop-In ⚠️ Especificações não verificadasConsulte o preço
Ver ficha técnica →ADM237LJR
✅ Drop-In ⚠️ Especificações não verificadasConsulte o preço
Ver ficha técnica →ADM238LJR
✅ Drop-In ⚠️ Especificações não verificadas📋 Alternativa de referência (fora do catálogo)
ADM234LJR Especificações
| Product Type | RS-232 line driver and receiver IC |
| Tensão de alimentação | 5 V |
| Number of Drivers | 4 |
| Number of Receivers | 4 |
| Taxa de dados | 120 kB/s |
| RS-232 Output Swing | 9 V |
| Interface Standard | EIA-232-E and V.28 |
| Power Supply Architecture | Single 5 V supply with on-board DC-DC converters |
| Charge-Pump Capacitor Value | 1 F |
| Receiver Input Voltage | 30 V |
| Shutdown Function | Low-power shutdown with receivers active |
| Encapsulamento | 16-lead SOIC |
| Tipo de montagem | Surface mount |
| Commercial Temperature Grade | Commercial grade |
| Termination Count | 16 |
Configuração de pinos do ADM234LJR
| Pino 1 | R1OUT — Receiver 1 output |
| Pino 2 | R2OUT — Receiver 2 output |
| Pino 3 | R3OUT — Receiver 3 output |
| Pino 4 | R4OUT — Receiver 4 output |
| Pino 5 | GND — Ground |
| Pino 6 | V+ — Positive supply input |
| Pino 7 | R4IN — Receiver 4 input |
| Pino 8 | R3IN — Receiver 3 input |
| Pino 9 | R2IN — Receiver 2 input |
| Pino 10 | R1IN — Receiver 1 input |
| Pino 11 | T1IN — Driver 1 input |
| Pino 12 | T2IN — Driver 2 input |
| Pino 13 | T3IN — Driver 3 input |
| Pino 14 | T4IN — Driver 4 input |
| Pino 15 | NC — Not connected (per datasheet) |
| Pino 16 | NC — Not connected (per datasheet) |
Aplicações típicas
ADM234LJR é adequado para 6 aplicaçãos: Industrial Instrumentation Interfaces, Data Acquisition Equipment, Embedded Control and Service Ports, Test and Measurement Equipment, Point-of-Sale and Peripheral Equipment, Serial Communication in Control Cabinets.
Industrial Instrumentation Interfaces
The ADM234LJR is appropriate for industrial instrumentation that must expose several RS-232 signals from a 5 V control board. Its 4 drivers and 4 receivers allow multiple command, status, and measurement channels to share one interface IC, while the internal DC-DC converters eliminate the need for a separate ±12 V rail. The 120 kB/s data rate is suitable for many configuration and monitoring protocols. Designers should still provide correct charge-pump capacitors and verify the cable grounding and protection strategy for the installation environment.
Recomendado
Data Acquisition Equipment
The ADM234LJR can connect a compact data-acquisition unit to legacy RS-232 equipment when only a 5 V supply is available. Four receivers support incoming measurement or command signals, while four drivers support control and status outputs. Its single-supply CMOS implementation reduces board complexity compared with a discrete bipolar RS-232 interface. At up to 120 kB/s, it suits moderate-rate laboratory and industrial data transfers. A complete design must observe the datasheet capacitor recommendations and use an appropriate transceiver or protection device when cables leave the enclosure.
Recomendado
Embedded Control and Service Ports
The ADM234LJR is useful for embedded controllers that need a service or configuration port using the RS-232 standard. Four drivers and four receivers provide enough channels for console commands, status reporting, boot-loader communication, and peripheral control without using four separate interface packages. The 5 V supply requirement is convenient for systems already powered by a regulated logic rail, and the approximately 9 V output swing supports RS-232 signaling. Firmware should configure the interface for the voltage levels and logic polarity expected by the connected equipment.
Recomendado
Test and Measurement Equipment
The ADM234LJR can be used in test and measurement equipment that must communicate with older RS-232 instruments from a modern 5 V control platform. Its four receiver inputs support command channels and status lines, and its four driver outputs support result, trigger, and control signaling. The 120 kB/s rate is adequate for many serial-control workflows but should be checked against the instrument protocol. Because RS-232 is an unbalanced interface, the enclosure should provide a stable reference ground and suitable surge or ESD protection for long external cables.
Recomendado
Point-of-Sale and Peripheral Equipment
The ADM234LJR can support RS-232 links in point-of-sale terminals, printers, scanners, and other peripheral equipment designed around legacy serial interfaces. A 5 V-powered system can use the integrated converters instead of adding a negative supply and external charge-pump circuitry. Multiple channels reduce the connector count and simplify control of receipt, status, and reset lines. The selected peripheral must support the electrical conventions of the ADM234LJR, and the PCB layout should keep the charge-pump and interface capacitor loops compact.
Recomendado
Serial Communication in Control Cabinets
The ADM234LJR is suited to control-cabinet equipment requiring a compact RS-232 interface alongside 5 V logic. Its 4-by-4 channel arrangement can connect local controllers, displays, or service adapters while internal DC-DC converters provide the required bipolar drive from one supply. The commercial-grade ordering information and 120 kB/s rate support many industrial communication tasks, but the final product must be checked for temperature, EMC, surge, and isolation requirements specific to the cabinet environment.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para ADM234LJR — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | ADM231LJR | ADM232LJR | ADM236LJR | ADM237LJR | ADM238LJR |
|---|---|---|---|---|---|---|
| Package | 16-lead SOIC | 16-lead SOIC | 16-lead SOIC | 16-lead SOIC | 16-lead SOIC | 16-lead SOIC |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
Principais diferenciais
- Four transmitters and four receivers in one interface IC (vs ADM231LJR)
- Single 5 V implementation with integrated level conversion (vs ADM232LJR)
- 120 kB/s RS-232 operation (vs ADM236LJR)
Notas de projeto
The ADM234LJR is designed for single 5 V operation and includes on-board DC-DC converters for RS-232 output generation. Follow the manufacturer datasheet for the required 1 F charge-pump capacitors, place them close to the relevant pins, and keep the input bypass capacitor return path short. Do not assume that the internal converters eliminate the need for local supply decoupling.
Route the RS-232 driver and receiver connections directly to the connector or protection network, and keep the high-voltage charge-pump areas away from sensitive low-level analog and digital traces. Use a solid ground plane, provide a nearby chassis or signal-ground connection according to the system grounding strategy, and maintain the datasheet-recommended spacing around the interface pins.
Do not substitute an ADM2xx-family device solely because it uses a similar SOIC package. The ADM234LJR has a specific 4-driver and 4-receiver arrangement, and the exact pin functions must be checked against the candidate datasheet. Also verify that the selected alternative supports the required 5 V supply, data rate, shutdown behavior, and RS-232 output swing before releasing a replacement.
Informações de conformidade
The supplied verified web data identifies the manufacturer datasheet and commercial-grade product information but does not provide explicit RoHS, REACH, lead-free, halogen-free, or conflict-minerals statements. No compliance claim has been inferred.
