ADM202JN

Overview

The ADM202JN is a dual-channel RS-232 line driver and receiver designed for single 5 V power supply operation. It features an on-chip charge pump that generates ±10 V output levels using external 0.1 µF capacitors connected to C1+/- and C2+/- pins. The device supports transmission rates up to 120 kBaud with low power consumption of approximately 2.0 mA quiescent current. It includes two drivers and two receivers, providing overvoltage protection on receiver inputs up to ±30 V and ESD protection exceeding 2 kV. The component operates within a commercial temperature range of 0 °C to 70 °C and is housed in a 16-lead plastic DIP package.

Feature Summary

• Integrates internal voltage doubler and inverter to generate required RS-232 voltages from a single 5 V supply without external DC-DC converters.
• Provides TTL/CMOS compatible inputs with internal pull-up resistors and Schmitt trigger receivers with hysteresis for noise immunity.
• Includes robust protection features such as ±30 V continuous overvoltage tolerance on receiver inputs and high ESD ratings.

Applications

• Computer serial port interfaces
• Peripheral equipment connections
• Modem communication links
• Printer interface circuits
• Instrumentation data acquisition systems

Procurement Notes

Verify the specific suffix 'JN' corresponds to the N-16 Plastic DIP package option and the 0 °C to 70 °C commercial temperature range. Confirm that the design accommodates the requirement for four external 0.1 µF charge pump capacitors, distinguishing it from the internally capped ADM203 variant. Ensure pinout compatibility with existing PCB layouts referencing the standard ADM202 configuration.

Selection Notes

Select this component when a dual-channel RS-232 transceiver is needed with minimal external component count beyond the charge pump capacitors. It is suitable for designs requiring low power dissipation and robust input protection against high-voltage transients. Consider the physical dimensions of the 16-lead DIP package during layout planning. Verify that the 120 kBaud speed meets the system's maximum baud rate requirements.

Part Context

The ADM202 series serves as an enhancement to the legacy AD230–AD241 family, offering improved power efficiency through epitaxial BiCMOS construction. It maintains functional compatibility while reducing power consumption significantly compared to older generations. The JN designation specifically identifies the narrow 16-lead DIP package variant intended for through-hole mounting applications in commercial environments.

Replacement Considerations

The ADM203JN offers equivalent functionality but eliminates the need for external charge pump capacitors by integrating them internally. Other variants include the SOIC packages (ADM202JRN, ADM202JRW) for surface mount applications. Ensure any replacement matches the package type and thermal characteristics if transitioning between DIP and SOIC formats.