ADM232AARN - 200kbps Dual RS-232 IC | Analog Devices
N.º de pieza: ADM232AARN ✓ ActivoADM232AARN Descripción general
An RS-232 transceiver is a semiconductor interface that converts low-voltage digital logic signals into bipolar RS-232 levels and converts received bipolar signals back into TTL or CMOS logic levels. Within the electronics hierarchy, the ADM232AARN is an RS-232 transceiver, interface IC, and power-management-assisted data-conversion component used to bridge modern digital equipment with legacy serial ports.
The ADM232AARN integrates an on-chip DC-DC charge pump, allowing bipolar RS-232 levels to be generated from one 5 V supply without a separate negative power rail. The charge pump uses small 0.1 uF external capacitors. Its two-driver, two-receiver arrangement supports two RS-232 channels per package and reduces the number of interface components required in multi-port equipment.
Data rates reach 200 kB/s, making the device suitable for equipment that needs faster serial transfer than low-speed RS-232 transceivers. The interface meets EIA-232-E and V.28 specifications. According to the Analog Devices datasheet, the outputs provide approximately 9 V swing with a 5 V supply, while the receivers accept input voltages to 30 V, providing useful margin for standard RS-232 signaling.
Typical uses include industrial control consoles, point-of-sale equipment, instrumentation, data acquisition systems, and embedded products that retain a legacy RS-232 port. The integrated charge pump simplifies board layout, while the narrow 16-SOIC package supports space-constrained designs without requiring a separate negative supply regulator.
When laying out the circuit, place the charge-pump capacitors close to their specified pins and route the driver outputs and receiver inputs away from sensitive analog and high-speed digital traces. Confirm ground-reference compatibility between the two connected RS-232 endpoints because the interface converts voltage levels but does not isolate the ground connection.
This page combines device specifications, pin-compatible alternatives, interface application guidance, and practical layout considerations to support component selection, PCB implementation, and sourcing decisions for the ADM232AARN.
Alternativas directas para ADM232AARN — mismo encapsulado, compatible pin a pin. Se excluyen las piezas de otro encapsulado que requieren retrabajo de la PCB.
Variantes de esta serie
Modelos de la misma serie compatibles directamente con ADM232AARN (mismo factor de forma y huella) — difiere en Package, Supply Voltage, Charge-Pump Capacitor Value, Maximum Data Rate, Receiver Input Voltage Range.
ADM232LAR
✅ Sustitución directaConsulte el precio
Ver hoja de datos →ADM231LAR
✅ Sustitución directaConsulte el precio
Ver hoja de datos →MAX232ECD
✅ Sustitución directaConsulte el precio
Ver hoja de datos →ADM232AARN Especificaciones
| Product Type | Dual RS-232 line driver and receiver transceiver |
| Maximum Data Rate | 200 kB/s |
| Tensión de alimentación | 5 V |
| Number of Drivers | 2 |
| Number of Receivers | 2 |
| Number of RS-232 Channels | 2 |
| Charge-Pump Capacitor Value | 0.1 uF |
| Integrated Voltage Converter | On-chip DC-DC charge pump |
| Transmitter Output Swing | 9 V with 5 V supply |
| Receiver Input Voltage Range | Up to 30 V |
| RS-232 Compliance | EIA-232-E and V.28 |
| Encapsulado | 16-lead narrow SOIC |
| Lead Count | 16 leads |
| Tipo de montaje | Surface mount |
Guía de configuración de pines de ADM232AARN 16-lead narrow soic
Configuración de pines para ADM232AARN (encapsulado 16-lead narrow soic). La numeración de pines, las funciones y los diagramas de conexión se definen en la hoja de datos del fabricante. Consúltela para conocer el footprint exacto y las directrices de soldadura.
No hay datos detallados de patillaje disponibles para ADM232AARN.
Consulte la hoja de datos para ver la configuración completa de patillas.
Aplicaciones típicas
ADM232AARN es adecuado para 6 aplicacións: Industrial Serial Control Interface, Point-of-Sale Terminal Connectivity, Data Acquisition and Instrumentation, Embedded Equipment Service Port, Telecommunications Network Equipment, RS-232 Test and Measurement Adapter.
Industrial Serial Control Interface
The ADM232AARN fits industrial equipment that must retain a legacy RS-232 control or service port while operating from a 5 V logic rail. Its two drivers and two receivers support two bidirectional channels per package, and the documented 200 kB/s rate provides useful throughput for configuration transfers and diagnostic data. The integrated charge pump produces bipolar RS-232 levels from the 5 V supply, avoiding a separate negative rail. Keep the charge-pump capacitors near their pins and verify temperature, grounding, and surge requirements at the enclosure level.
Recomendado
Point-of-Sale Terminal Connectivity
The ADM232AARN is appropriate for point-of-sale terminals, scanners, and service peripherals that use RS-232 connections alongside 5 V digital electronics. Two integrated transceiver channels reduce the number of interface packages, while the 200 kB/s maximum rate supports command exchange and burst traffic more effectively than slow legacy serial links. Its 16-lead narrow SOIC footprint leaves board area for connectors and power circuitry. Place protection components at the connector boundary and route the driver outputs away from processor clocks and sensitive sensor inputs.
Recomendado
Data Acquisition and Instrumentation
The ADM232AARN can connect laboratory instruments, data-acquisition controllers, and service computers where a compact, high-speed RS-232 port is required. The 200 kB/s rate accommodates measured data transfer and control commands, while two receivers and two drivers allow multiple device channels where wiring permits. Operation from one 5 V rail simplifies analog and digital power planning. For measurement accuracy, use a defined common ground, keep return-current paths short, and isolate the interface when the connected equipment uses a different ground reference.
Recomendado
Embedded Equipment Service Port
The ADM232AARN is well suited to embedded instruments that require a service, configuration, or diagnostic port without adding a negative power supply. Its integrated charge pump and 0.1 uF capacitors simplify the analog side of a 5 V design, and the narrow 16-SOIC package is useful where connector placement is constrained. The 200 kB/s rate supports firmware upload and status reporting during maintenance. Design the port so disabled or unused channels are handled according to the pin definitions, and verify the interface remains stable during hot-plug or ground-offset conditions.
Recomendado
Telecommunications Network Equipment
The ADM232AARN can support control, provisioning, and diagnostic ports in telecommunications equipment where RS-232 remains common for field-service access. A single 5 V supply and an integrated charge pump reduce power-tree complexity, while the 200 kB/s rate supports firmware transfer and configuration commands. Two drivers and two receivers provide efficient use of a narrow SOIC footprint. Keep cable transient protection close to the connector and maintain a short ground return, since the RS-232 receiver’s 30 V input tolerance does not replace external surge protection.
Recomendado
RS-232 Test and Measurement Adapter
The ADM232AARN is a practical choice for compact test adapters that convert a 5 V host interface to a standard RS-232 port. Its 200 kB/s capability supports automated control commands and moderate data transfer, while the integrated charge pump avoids requiring a separate negative-voltage generator. Two channels can serve two instruments or provide receive-only and transmit-only functions when circuit requirements allow. Validate logic levels, enable states, and unused inputs in the host interface, and use connector-side protection when the cable can extend outside the enclosure.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para ADM232AARN — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | ADM232LAR | ADM231LAR | MAX232ECD |
|---|---|---|---|---|
| Package | 16-SOIC (narrow) | 16-SOIC (narrow) | 16-SOIC (narrow) | 16-SOIC (narrow) |
| Brand | Analog Devices | Analog Devices | Analog Devices | Maxim Integrated |
| Device Architecture | Two RS-232 drivers and two receivers | Dual RS-232 driver and receiver | Dual RS-232 transceiver | Dual RS-232 driver and receiver |
Diferenciadores clave
- Higher documented throughput than the ADM232L-family option (frente a ADM232LAR)
- Same-manufacturer alternative preserves the narrow SOIC footprint (frente a ADM232LAR)
- Integrated dual-channel interface reduces package count (frente a MAX232ECD)
Notas de diseño
Place the two 0.1 uF charge-pump capacitors close to their designated pins and keep their return paths short. The capacitors convert the 5 V supply into the bipolar voltage used by the drivers, so long or narrow power traces can degrade supply integrity and contribute to transmission errors. Follow the capacitor type, tolerance, and connection arrangement shown in the manufacturer application circuit, and avoid placing sensitive analog nodes between the capacitor and IC pins.
Do not assume that a 16-lead SOIC footprint proves pin compatibility. Verify every power, ground, driver-output, receiver-input, and enable-related connection against the manufacturer pin-description table for the exact replacement MPN. Also confirm supply voltage, charge-pump capacitor value, receiver thresholds, and output levels. A footprint match can still require schematic and waveform validation before approving a substitution.
Route each RS-232 driver output directly toward its connector and keep it away from clocks, ADC inputs, and other low-level analog traces. Maintain a continuous ground reference between connected equipment because the interface provides voltage-level conversion rather than galvanic isolation. For external cables, place transient protection near the connector and use the receiver’s 30 V input tolerance as operating margin rather than as a substitute for surge protection.
Información de cumplimiento
The Analog Devices product and datasheet pages do not explicitly state the requested compliance fields. EIA-232-E and V.28 are interface specifications rather than material-compliance declarations.
