ADM213AR

Overview

The ADM213AR is a CMOS RS-232 transceiver designed for EIA-232-E and V.28 interfaces using a single +5 V supply. It integrates four drivers and five receivers with internal charge pump voltage converters generating ±10 V rails. The device supports data rates up to 120 kB/s and features low power shutdown mode consuming less than 5 μW. During shutdown, two receivers (R4 and R5) remain active for ring indicator monitoring. It includes an active high receiver enable pin and operates within the industrial temperature range of -40°C to +85°C.

Feature Summary

• Integrates on-board DC-to-DC converters allowing operation from a single 5 V supply without external transformers.
• Features a low power shutdown mode that reduces current consumption to under 5 μW for battery applications.
• Maintains two receiver outputs in active state during shutdown to support ring indicator monitoring functions.
• Includes Schmitt-trigger inputs on receivers to ensure noise immunity and error-free reception.

Applications

• Battery-powered computers and portable equipment
• Modems and peripheral interface connections
• Printers and instruments requiring RS-232 communication

Procurement Notes

Verify the specific package option required, as the base model number corresponds to the SOIC_W variant. Confirm RoHS compliance status by checking for the Z suffix if lead-free components are mandated. Ensure the ordering suffix matches the desired reel or tube packaging configuration for production integration.

Selection Notes

Select this component when a single 5 V supply is available but standard RS-232 levels are needed. Choose this part over similar family members specifically because it requires two receivers to remain functional while the rest of the system is powered down. Verify that the 120 kB/s data rate meets the application requirements.

Part Context

This component belongs to the ADM2xx family of line drivers and receivers. It serves as a direct upgrade to older MAX206-211/213 devices. The ADM213 is distinct within the series due to its specific combination of driver/receiver counts and the unique capability of keeping specific receivers active during shutdown states.

Replacement Considerations

The datasheet confirms pin compatibility with MAX206, MAX207, MAX208, MAX211, and MAX213 devices. These parts can be used as direct replacements in existing designs without circuit modifications.

FAQ

Which receivers remain active during shutdown?

Receivers R4 and R5 remain enabled and active during shutdown mode to allow for ring indicator monitoring.

What is the logic level for the Enable input?

The Enable (EN) input on the ADM213 is active high, unlike the ADM211 where it is active low.

How does the Shutdown input function?

The Shutdown (SD) input is active low. When driven low, it disables the charge pump and most receivers, reducing power consumption significantly.