ADM206ARSZ-REEL

Overview

The ADM206ARSZ-REEL is a CMOS RS-232 transceiver from Analog Devices, packaged in a 24-lead SSOP. It operates on a single +5 V supply and integrates two internal charge pumps to generate the ±10 V required for EIA-232-E compliance. The device features four drivers and three receivers with a data rate of 120 kB/s. It includes a low-power shutdown mode that reduces current consumption to less than 5 μW. The part supports TTL/CMOS logic levels and provides Schmitt-trigger inputs for noise immunity.

Feature Summary

• Integrates dual charge pump voltage converters to generate ±10 V supplies from a single 5 V input.
• Features a low power shutdown mode that significantly reduces energy consumption for battery applications.
• Includes an enable function to place receiver outputs in a high impedance state for bus sharing.
• Provides Schmitt-trigger receiver inputs to ensure error-free reception in noisy environments.

Applications

• Battery-powered computers and portable equipment
• Modems and printers requiring RS-232 interfaces
• Instruments and peripherals connected via serial communication

Procurement Notes

Verify the specific ordering suffix to confirm package type and RoHS compliance status. The REEL suffix indicates tape and reel packaging suitable for automated assembly. Confirm the temperature range matches the industrial specification requirements for the target environment before finalizing procurement orders.

Selection Notes

Select this component when a single 5 V supply is available but RS-232 voltage levels are required. The ADM206 offers four drivers and three receivers with a dedicated shutdown control. Compare against the ADM211 or ADM213 if additional receivers or different enable logic polarities are needed for the system design.

Part Context

This component belongs to the ADM2xx family of line drivers and receivers designed for EIA-232-E and V.28 interfaces. The family allows operation without external ±12 V supplies by using integrated charge pumps. The ADM206 specifically provides a configuration optimized for standard serial communication tasks with low power management capabilities.

Replacement Considerations

The ADM206AR-REEL serves as a direct pin-compatible replacement within the same series. Other members of the ADM2xx family, such as the ADM211 or ADM213, offer similar functionality but may differ in the number of receivers or enable logic polarity.

FAQ

What is the purpose of the internal pull-up resistors on the transmitter inputs?

Each TTL/CMOS transmitter input has an internal 400 kΩ pull-up resistor to VCC. This ensures that unused inputs are pulled high, forcing the corresponding outputs into a low state to prevent floating signals.

How does the shutdown mode affect the receiver outputs?

When the shutdown input is active, the charge pump is disabled, and all receiver outputs are placed in a high impedance state, effectively disconnecting them from the circuit to save power.

Can the ADM206 drive long cables?

Yes, the device can drive long cables provided the total load capacitance does not exceed 2500 pF. Exceeding this limit may reduce the slew rate and maximum transmission baud rate.