**ADM242ANZ: A Comprehensive Guide to the 3V Dual Channel RS-232 Line Driver/Receiver**

In the realm of serial communication, the RS-232 standard remains a cornerstone for point-to-point data exchange between devices. Facilitating this communication in modern, low-voltage systems requires robust interface components. The **ADM242ANZ from Analog Devices** stands out as a premier solution, a **3V dual-channel line driver/receiver** engineered for high-performance EIA-232E and V.28/V.24 communications.

This integrated circuit is specifically designed to operate from a **single +3.0V to +3.6V power supply**, making it exceptionally suited for portable, battery-powered equipment like handheld computers, portable instruments, and cellular phones. Despite its low-voltage core, it generates the requisite ±5.5V output voltages for compliant RS-232 signals through an innovative on-chip, dual charge-pump voltage converter. This eliminates the need for costly, bulky external components and simplifies board design.

The ADM242ANZ integrates two drivers and two receivers, providing a complete serial port solution in a compact package. The drivers translate TTL/CMOS input levels into ±5.5V RS-232 outputs, ensuring signal integrity over longer cables. Conversely, the receivers convert incoming RS-232 signals (which can be as high as ±25V) down to 3V CMOS-compatible logic levels, offering a crucial protection layer for sensitive low-voltage system logic.

A key feature of this device is its **impressive data rate capability of up to 460 kbps**, ensuring it can handle demanding communication protocols. Furthermore, it is designed for low power consumption, a critical attribute for battery life. The charge pump requires only four small external 0.1 µF capacitors, minimizing the total solution footprint. The device also includes a power-saving shutdown mode, which reduces supply current to a mere 1 µA, further enhancing its utility in power-critical applications. Its robust ESD protection on the driver outputs and receiver inputs guards against electrostatic discharges exceeding ±15 kV (IEC 1000-4-2), significantly improving system reliability.

Typical applications span a wide range of industries, from industrial control and networking equipment to telecommunications infrastructure and any system requiring a reliable serial data path. The ADM242ANZ represents a perfect blend of miniaturization, power efficiency, and robust performance.

**ICGOODFIND**: The ADM242ANZ is an exceptional choice for designers seeking a **highly integrated, low-power, and reliable RS-232 interface solution** for 3V systems, combining compliance, protection, and ease of use.

**Keywords**: RS-232 Interface, Low Voltage, Dual Channel, Charge Pump, ESD Protection.