ADM208ARSZ

Overview

The ADM208ARSZ is a CMOS RS-232 line driver and receiver manufactured by Analog Devices Inc. It operates from a single +5 V power supply, utilizing internal charge pumps to generate the required ±10 V levels for EIA-232-E compliance. The device integrates four drivers and four receivers in a 24-lead Shrink Small Outline Package (SSOP). It supports data rates up to 120 kB/s with an output voltage swing of ±9 V under typical loading conditions. The component functions within an industrial temperature range of -40°C to +85°C and requires external capacitors ranging from 0.1 μF to 10 μF for the voltage converters.

Feature Summary

• Integrates on-board DC-to-DC voltage converters to enable operation from a single 5 V supply without requiring external negative voltage sources.
• Features Schmitt-trigger inputs on all receivers to provide noise immunity and ensure error-free reception in noisy environments.
• Includes internal pull-up resistors on transmitter inputs and pull-down resistors on receiver inputs to define logic states when pins are unconnected.
• Designed with latch-up protection and guaranteed receiver input levels up to ±30 V for enhanced signal integrity.

Applications

• Computers
• Peripherals
• Modems
• Printers
• Instruments

Procurement Notes

Verify that the specific ordering suffix matches the required package type, as the standard part number may correspond to different physical footprints. Confirm RoHS compliance status if environmental regulations apply to the assembly process. Ensure the procurement channel provides documentation verifying the component's origin and authenticity prior to purchase.

Selection Notes

Select this component when a full-duplex RS-232 interface is required using only a single 5 V digital supply. It is suitable for applications where space is limited due to the small SSOP footprint. Note that unlike other members of the ADM2xx family, this specific model does not include a low-power shutdown mode or an enable pin, making it appropriate for always-on systems.

Part Context

The ADM208ARSZ belongs to the ADM2xx family of line drivers/receivers designed for EIA-232-E and V.28 communications interfaces. This family allows designers to replace traditional dual-supply solutions with single-supply CMOS alternatives. The ADM208 variant specifically provides a symmetric configuration of four drivers and four receivers, differing from models like the ADM206 which offers three receivers.

Replacement Considerations

The datasheet indicates that the ADM2xx family is essentially plug-in compatible with older AD2xx derivatives. Designers should verify pinout compatibility when replacing legacy components. No specific substitute part numbers are listed in the provided documentation.