ADM208AR-REEL

Overview

The ADM208AR-REEL is a CMOS RS-232 line driver and receiver manufactured by Analog Devices Inc. It operates from a single +5 V supply, utilizing internal charge pumps to generate the ±10 V required for EIA-232-E compliance. The device integrates four drivers and four receivers with full duplex communication capability. It supports data rates up to 120 kB/s and features Schmitt-trigger inputs with 0.65 V hysteresis for noise immunity. The component operates within an industrial temperature range of -40°C to +85°C and requires external capacitors ranging from 0.1 μF to 10 μF.

Feature Summary

• Integrates on-board DC-to-DC converters to generate ±10 V supplies from a single 5 V input
• Features Schmitt-trigger receivers with built-in hysteresis for reliable signal reception in noisy environments
• Includes internal pull-up resistors on transmitter inputs and pull-down resistors on receiver inputs
• Provides ±9 V output swing with a 5 V supply under typical loading conditions

Applications

• Computers
• Peripherals
• Modems
• Printers
• Instruments

Procurement Notes

Verify that the ordering suffix matches the specific package variant required for the design. Confirm the RoHS compliance status indicated by the 'Z' suffix if environmental regulations apply. Ensure the reel packaging format aligns with automated assembly equipment specifications before finalizing procurement orders.

Selection Notes

Select this part when four independent bidirectional channels are required for RS-232 communication. It is suitable for systems lacking negative voltage rails due to its integrated charge pump. Verify that the application does not require a low-power shutdown mode, as this specific model lacks the SD control pin found in other family members.

Part Context

This component belongs to the ADM2xx family of single-supply RS-232 transceivers designed for EIA-232-E and V.28 interfaces. The family includes variants with different driver/receiver counts and power management features. The ADM208 specifically provides a balanced configuration of four drivers and four receivers without shutdown capabilities.

Replacement Considerations

ADM208AN

FAQ

Does the ADM208 support a low power shutdown mode?

No, the ADM208 does not include a shutdown (SD) pin or low power mode. Variants such as the ADM206, ADM211, and ADM213 feature this functionality.

What is the maximum supported data rate?

The device supports data transmission rates up to 120 kB/s while maintaining guaranteed signal levels under worst-case loading conditions.

How many external capacitors are required for operation?

Four external capacitors are required: two for the voltage doubler stage and two for the voltage inverter stage of the internal charge pump.