ADM242AR - 200 kbps 2/2 RS-232 Transceiver | Analog Devices
N.º de pieza: ADM242AR ✓ Activo| Cant. | Precio unitario | Total |
|---|---|---|
| 1 | $2.715 | $2,72 |
| 10 | $0 | $0,00 |
| 100 | $0 | $0,00 |
| 500 | $0 | $0,00 |
| 1.000 | $0 | $0,00 |
ADM242AR Descripción general
An RS-232 transceiver is an interface IC that converts low-voltage CMOS logic signals into voltage levels suitable for RS-232 links, while receivers convert the bipolar line levels back into CMOS-compatible signals. It belongs to the RS-232 transceiver hierarchy, alongside line drivers and line receivers, and is used in the broader category of interface ICs for point-to-point serial communication equipment.
Key verified features include a maximum data rate of 200 kbps, operation from a single 5 V supply, two integrated drivers, two integrated receivers, and external charge-pump capacitors rated at 0.1 µF. The SOIC-18 package supports surface-mount assembly. The verified operating-temperature range is -40°C to +85°C, making the device suitable for industrial-temperature equipment when other system requirements are satisfied.
The on-chip charge pump avoids a discrete negative-voltage supply and supports a compact interface implementation. In an RS-232 application, the CMOS-side pins connect to a UART or another serial controller, while driver outputs connect through the cable or board-level interface and receiver inputs accept the remote signal. The supply and charge-pump capacitor network must be placed according to the manufacturer datasheet because their stability and layout affect communication reliability.
Typical uses include industrial serial adapters, instrumentation, data-acquisition equipment, embedded serial links, and control systems requiring more than one RS-232 direction. The ADM242AR is appropriate when two transmit and two receive channels are needed in one 5 V interface. Because its data rate is specified up to 200 kbps, cable length, termination, grounding, and connector requirements should be evaluated together with the UART baud rate.
For new layouts, reserve all 18 package pins, connect the charge-pump capacitors as specified by Analog Devices, and provide a local bypass capacitor near the supply pins. The verified SOIC-18 footprint should be checked against the selected board and the exact ADM242AR pinout. Designers should confirm RS-232 electrical requirements, shutdown or enable behavior, and system-level ground strategy before release.
This page combines the verified Analog Devices product description, distributor package and price references, and cross-reference results to help engineers evaluate the ADM242AR. It emphasizes verified facts and flags details that were not available in the supplied data rather than estimating missing electrical values.
Alternativas directas para ADM242AR — 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 ADM242AR (mismo factor de forma y huella) — difiere en Package, Product Type, Operating Temperature Range, Supply Voltage, Logic Compatibility.
Herramienta de comparación rápida — seleccione piezas alternativas para compararlas lado a lado:
ADM242AR
✅ Sustitución directa✓ En stock
Consulte el precio
Ver hoja de datos →MAX3232CD
✅ Sustitución directa✓ En stock
$0.7831 / unidad
Ver hoja de datos →MAX232CD
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
MAX211IDB
✅ Sustitución directa✓ En stock
$1.41 / unidad
Ver hoja de datos →SN75176BD
✅ Sustitución directa✓ En stock
$0.1501 / unidad
Ver hoja de datos →ADM485ARZ
✅ Sustitución directa✓ En stock
$1.62 / unidad
Ver hoja de datos →ADM242AR Especificaciones
| Product Type | CMOS RS-232 transceiver |
| Driver Count | 2 |
| Receiver Count | 2 |
| Maximum Data Rate | 200 kbps |
| Tensión de alimentación | 4.5 V to 5.5 V |
| Nominal Supply | 5 V |
| External Charge-Pump Capacitor | 0.1 µF |
| Encapsulado | SOIC-18 |
| Tipo de montaje | Surface mount |
| Temperatura de funcionamiento | -40°C to +85°C |
| Driver and Receiver Configuration | 2/2 full RS-232 transceiver |
| Logic Compatibility | CMOS RS-232 |
| Charge-Pump Architecture | On-chip charge pump |
| RS-232 Level Generation | Bipolar levels generated from 5 V supply |
| Supply Type | Single supply |
Guía de configuración de pines de ADM242AR soic-18
Configuración de pines para ADM242AR (encapsulado soic-18). 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 ADM242AR.
Consulte la hoja de datos para ver la configuración completa de patillas.
Aplicaciones típicas
ADM242AR es adecuado para 6 aplicacións: Industrial Serial Communication Adapter, Data-Acquisition Equipment, Embedded Control System, Instrumentation and Test Equipment, Legacy Computer Serial Port Interface, Building Automation Controller.
Industrial Serial Communication Adapter
The ADM242AR fits an industrial adapter that needs multiple RS-232 directions rather than a single transmit/receive pair. Its two drivers and two receivers provide a compact 2/2 interface, while the verified 200 kbps rate supports UART links operating below that limit. The single 5 V supply and 0.1 µF external charge-pump capacitors simplify the power architecture compared with a design requiring a separate negative supply. Place the interface near the serial connector and preserve a low-impedance ground return so the bipolar RS-232 signal has an appropriate reference.
Recomendado
Data-Acquisition Equipment
The ADM242AR is useful in data-acquisition equipment that must exchange commands and receive measurements over several RS-232 channels. The 2/2 configuration lets one interface IC handle two outbound control or status signals and two inbound data signals, reducing the number of separate line-driver and line-receiver packages. Its 200 kbps maximum data rate is suitable for many legacy control buses, provided the selected UART baud rate, cable length, grounding, and connector wiring are compatible with the application.
Recomendado
Embedded Control System
The ADM242AR can connect an embedded controller or programmable logic design to legacy RS-232 equipment when multiple channels are required. The CMOS-side interface operates from the 5 V system rail, and the integrated charge pump generates the bipolar signal levels needed by RS-232. Designers should allocate all 18 SOIC pins, follow the official pinout, and place the charge-pump capacitors close to their specified pins. If the system uses automatic shutdown or enable control, verify those functions against the exact ADM242AR datasheet before finalizing the schematic.
Recomendado
Instrumentation and Test Equipment
The ADM242AR is appropriate for instrumentation that uses RS-232 for configuration commands and status reporting. Two transmitter channels can support separate control and diagnostic outputs, while two receiver channels can accept commands and measurement-status signals. The 200 kbps capability accommodates many serial instrument protocols, but engineers must account for the electrical limitations of RS-232 cables and avoid assuming that every UART can safely operate at the maximum specified rate. Proper grounding and shield termination remain essential.
Recomendado
Legacy Computer Serial Port Interface
The ADM242AR can bridge a modern control system to legacy RS-232 ports on printers, controllers, or service equipment. The device provides separate driver and receiver resources for two communications paths, allowing one interface IC to replace several discrete line-driver and receiver sections. Designers should verify the exact connector pinout, logic polarity, baud rate, and cable length at the system boundary. The 5 V supply requirement also means the interface should be checked against the legacy equipment's electrical expectations and any isolated-ground requirements.
Recomendado
Building Automation Controller
The ADM242AR can support building-automation controllers that communicate with remote panels, actuators, or service computers over RS-232. Two drivers and two receivers provide flexibility for command, status, alarm, and diagnostic channels while keeping the interface in a surface-mount SOIC-18 package. The on-chip charge pump and specified 0.1 µF external capacitors support a compact single-5 V implementation. In a building environment, however, cable routing and grounding may dominate link reliability, so the PCB solution should be validated with the actual cable and equipment.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para ADM242AR — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | MAX3232CD | MAX232CD | MAX211IDB | SN75176BD | ADM485ARZ |
|---|---|---|---|---|---|---|
| Brand | Analog Devices | Maxim Integrated | Maxim Integrated | Maxim Integrated | Texas Instruments | Analog Devices |
Diferenciadores clave
- Integrated 2/2 channel count (frente a MAX232CD)
- Verified 200 kbps interface rate (frente a SN75176BD)
- Single 5 V charge-pump architecture (frente a MAX3232CD)
- Documented industrial temperature range (frente a ADM485ARZ)
Notas de diseño
Place the two verified 0.1 µF charge-pump capacitors and the local 5 V bypass capacitor exactly as directed by the Analog Devices datasheet. Keep the charge-pump traces short and follow the manufacturer’s ground-return path; long or shared high-current loops can degrade generated RS-232 levels. Confirm the SOIC-18 footprint and pin numbering against the official package drawing before fabrication.
Separate the two driver outputs from sensitive receiver and logic traces where practical. RS-232 driver outputs are bipolar and can transition quickly relative to the verified 200 kbps interface target. Route the connector-side signal and return conductors as a controlled pair, use the specified connector ground, and avoid long stubs. Cable shielding and grounding remain system-level considerations and cannot be replaced by PCB routing alone.
Do not assume that any SOIC-18 RS-232 IC is interchangeable with ADM242AR. The supplied cross-reference data identifies candidate products but does not establish identical pin assignments, package drawings, enable/shutdown behavior, or channel mapping. Before substitution, compare every pin, supply range, charge-pump capacitor requirement, and maximum data rate against the ADM242AR datasheet.
Información de cumplimiento
The supplied verified data does not state RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals status for ADM242AR. These fields remain unknown rather than assumed.
