ADM242AN - 200 kB/s 5 V RS-232 Transceiver | Analog Devices
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ADM242AN Descripción general
An RS-232 transceiver is an interface IC that combines voltage conversion, line drivers, and line receivers between CMOS-compatible logic and a differential-style, bipolar serial communications port. In the hierarchy of electronics, the ADM242AN belongs to interface ICs and data-interface converters, using charge-pump-assisted level shifting rather than an external negative power supply.
The ADM242 family is designed for high-speed RS-232 links operating up to 200 kB/s from a single 5 V supply. Its two-driver, two-receiver arrangement supports full-duplex point-to-point communication, while the 9 V output swing and 30 V receiver input range provide useful margin for standard RS-232 implementations. The 0.1 µF charge-pump capacitors keep the external power-supply requirement compact.
The device is identified as an EIA-232-E and V.28-compatible RS-232 interface in the verified manufacturer and distributor material. Its CMOS-based implementation avoids a separate external negative supply and integrates the charge-pump circuitry required to generate bipolar line-driver levels. The 18-pin PDIP package is a through-hole option for prototypes, legacy systems, and designs that prioritize easy inspection and hand soldering.
Typical uses include serial adapters, industrial equipment links, test and measurement instruments, and legacy computer peripherals that need two RS-232 channels from one interface IC. The 200 kB/s rate is higher than many slower RS-232 transceivers, while the five-volt supply simplifies integration with digital logic.
Designers should verify the ADM242AN package pinout and line-driver loading before layout. Keep charge-pump capacitor connections short, observe the required bypass and decoupling arrangement, and use protection appropriate to the cable environment because ESD and surge voltages on an external RS-232 port can exceed logic-level expectations.
This product page synthesizes verified manufacturer and distributor information, comparison-oriented interface details, and practical implementation guidance for engineers evaluating the ADM242AN as a dual-driver, dual-receiver RS-232 solution.
Alternativas directas para ADM242AN — 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 ADM242AN (mismo factor de forma y huella) — difiere en Mounting Type, Package.
Herramienta de comparación rápida — seleccione piezas alternativas para compararlas lado a lado:
ADM242ARZ
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
ADM242ANZ
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
ADM222ARZ
✅ Sustitución directa✓ En stock
$2.1 / unidad
Ver hoja de datos →ADM242AN Especificaciones
| Product Type | RS-232 line transceiver |
| Transmission Rate | 200 kB/s |
| Tensión de alimentación | 5 V |
| Number of Drivers | 2 |
| Number of Receivers | 2 |
| Charge Pump Capacitor | 0.1 µF external capacitor |
| RS-232 Output Swing | 9 V |
| Receiver Input Range | 30 V |
| Duplex | Full duplex |
| Compliance | EIA-232-E and V.28 specifications |
| Supply Configuration | Single supply |
| On-Board Converter | DC-DC charge-pump converter |
| Encapsulado | 18-pin PDIP |
| Tipo de montaje | Through-hole |
| Manufacturer | Analog Devices |
Guía de configuración de pines de ADM242AN 18-pin pdip
Configuración de pines para ADM242AN (encapsulado 18-pin pdip). 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 ADM242AN.
Consulte la hoja de datos para ver la configuración completa de patillas.
Aplicaciones típicas
ADM242AN es adecuado para 6 aplicacións: Legacy Serial Port Interface, Industrial Equipment Communication, Test and Measurement Instrument, Computer Peripheral Adapter, Data Acquisition System, Embedded Serial Communication Hub.
Legacy Serial Port Interface
The ADM242AN fits legacy serial-port designs that require two transmit and two receive channels from one 5 V interface IC. Its verified transmission-rate capability reaches 200 kB/s, while the integrated charge pump generates bipolar RS-232 levels using 0.1 µF external capacitors. Use it where a modern controller needs to communicate with older equipment through an RS-232 port, but confirm the exact 18-PDIP pinout and cable loading before fabrication.
Recomendado
Industrial Equipment Communication
The ADM242AN is appropriate for industrial equipment interfaces where a 5 V control board must reach a wired RS-232 peripheral. The dual-driver and dual-receiver arrangement provides two channels for full-duplex or multi-port equipment links, while the 9 V output swing and 30 V receiver input range support robust RS-232 signaling. The 200 kB/s rating helps preserve throughput, although cable length and external transient protection still require system-level validation.
Recomendado
Test and Measurement Instrument
For test and measurement instruments, the ADM242AN can provide a compact single-supply RS-232 control and data path. Its 200 kB/s maximum rate is sufficient for many legacy instrument-control protocols, and the integrated charge pump avoids a separate negative supply rail. The two receivers can support status or handshake signals while two drivers serve separate outputs. Verify the instrument’s logic levels, baud-rate tolerance, and connector protection requirements before selecting the interface.
Recomendado
Computer Peripheral Adapter
The ADM242AN can support a legacy computer peripheral adapter when the host electronics use 5 V logic and the peripheral exposes RS-232. The device’s two-driver, two-receiver organization allows bidirectional communication in a single package, and its 200 kB/s rate is suitable for many low- to moderate-speed serial links. Because the verified data does not provide a complete modern connector or protection circuit, the adapter should add appropriate cable-side surge and ESD protection.
Recomendado
Data Acquisition System
The ADM242AN can connect a data-acquisition controller to older RS-232 instruments or service ports. Its 200 kB/s class supports communication with devices that exchange commands, measurements, or status data at moderate speed, and the single 5 V supply simplifies integration with embedded control logic. The dual-channel arrangement can reduce component count, but system timing, cable capacitance, and isolation requirements should be evaluated during schematic design.
Recomendado
Embedded Serial Communication Hub
The ADM242AN is useful in an embedded serial communication hub that must present multiple RS-232 channels to a host processor. Two drivers and two receivers provide a practical channel count, while the integrated charge pump limits the need for a separate negative rail. The 18-pin PDIP package also suits prototypes and manually assembled boards. Firmware must still define buffering, flow control, and fault behavior because the transceiver does not provide protocol-level management.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para ADM242AN — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | ADM242ARZ | ADM242ANZ | ADM222ARZ |
|---|---|---|---|---|
| Package | 18-pin PDIP | SOIC-18 | 18-PDIP | SOIC-18 |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Product Type | RS-232 line transceiver | RS-232 line transceiver | RS-232 line transceiver | RS-232 transceiver family |
| Transmission Rate | 200 kB/s | 200 kb/s | 200 kb/s | High-speed RS-232 family context |
| Supply Voltage | 5 V | 5 V | 5 V | 5 V family context |
| Charge-Pump Capacitor | 0.1 µF | 0.1 µF | 0.1 µF family context | 0.1 µF family context |
Diferenciadores clave
- Dual-driver and dual-receiver arrangement (frente a ADM222ARZ)
- Single 5 V supply with integrated charge pump (frente a ADM242ARZ)
- Through-hole package choice (frente a ADM242ARZ)
Notas de diseño
The ADM242AN is specified for single 5 V operation and develops bipolar RS-232 levels with an on-chip charge pump and 0.1 µF external capacitors. Place the charge-pump capacitors and the supply bypass capacitor close to their associated device pins, use short traces, and verify the capacitor type, voltage rating, and ESR requirements against the manufacturer datasheet. Do not substitute a negative supply assumption into the design.
The verified package designation is 18-pin PDIP, so preserve through-hole pad spacing and pin numbering from the official package drawing. Do not assume the ADM242ARZ SOIC-18 footprint is interchangeable because the physical package differs. Before routing a replacement, compare every power, driver, receiver, ground, and charge-pump connection against the official ADM242AN pinout.
The 200 kB/s figure is a device capability, not a guarantee for every RS-232 cable and distance. Account for cable capacitance, connector loading, baud-rate tolerance, grounding, and external protection. The verified material specifies a 30 V receiver input capability, but an external RS-232 connector should still be reviewed for ESD, surge, and accidental voltage exposure before field deployment.
Información de cumplimiento
The supplied verified data identifies EIA-232-E and V.28 RS-232 specifications, but it does not provide RoHS, REACH, lead-free, halogen-free, or conflict-minerals declarations for ADM242AN.
