ADM208AR

Overview

The ADM208AR is a CMOS RS-232 line driver and receiver manufactured by Analog Devices, designed for EIA-232-E and V.28 communication interfaces. It operates from a single +5 V power supply using internal charge pumps to generate ±10 V levels. The device integrates four drivers and four receivers with a data rate of 120 kB/s. It requires only four external capacitors ranging from 0.1 μF to 10 μF. The component supports full-duplex communication without shutdown or enable control pins. It functions within an industrial temperature range of -40°C to +85°C and draws a typical supply current of 9 mA.

Feature Summary

• Integrates on-board DC-to-DC converters to generate required voltage levels from a single supply
• Provides high noise immunity through Schmitt-trigger inputs with defined hysteresis
• Features internal pull-up resistors on transmitter inputs and pull-down resistors on receiver inputs
• Delivers guaranteed output voltage swings meeting EIA-232-E specifications under worst-case loading

Applications

• Computers
• Peripherals
• Modems
• Printers
• Instruments

Procurement Notes

Verify the specific package variant against the ordering guide, as the base model number corresponds to multiple physical packages. Confirm RoHS compliance status based on the suffix designation. Ensure the selected version matches the required pin configuration for the target PCB layout. Cross-reference the manufacturer's latest datasheet revision to confirm active status and any specification updates prior to final procurement.

Selection Notes

Select this component when a standard four-driver, four-receiver RS-232 interface is required without low-power shutdown functionality. Verify that the application does not require an enable pin for bus sharing, as this part lacks that feature. Ensure the design accommodates the necessary external capacitor values for the charge pump circuit. Confirm that the operating environment falls within the specified industrial temperature limits.

Part Context

The ADM208AR belongs to the ADM2xx family of line drivers and receivers. This family includes variants such as the ADM206, ADM207, ADM211, and ADM213, which offer different combinations of drivers, receivers, and control features like shutdown modes. The ADM208 specifically provides a symmetric configuration of four drivers and four receivers without additional control logic.

Replacement Considerations

The ADM208 is pin-compatible with the MAX206 through MAX211/213 series. When substituting, verify that the replacement part matches the specific driver/receiver count and control pin requirements of the original design.