ADM2209EARU-REEL7

Overview

The ADM2209EARU-REEL7 is a dual-port RS-232 transceiver in a 38-lead TSSOP package. It integrates six drivers and ten receivers, operating from a single +12 V supply via an onboard charge pump that eliminates the need for a negative voltage rail. The device supports data rates up to 460 kbps under standard loads and up to 920 kbps with reduced capacitance. It features a dedicated standby supply pin (VSTBY) allowing one receiver per port to remain active for system wake-up while other sections are powered down.

Feature Summary

• Integrates onboard DC-to-DC charge pump to generate negative supply voltage from a single positive source
• Provides fail-safe receiver outputs that default to logic high when inputs are open or grounded
• Includes Schmitt trigger inputs on all receivers to ensure noise immunity and error-free reception
• Features integrated transient protection structures on all I/O lines for ESD and electrical fast transient immunity

Applications

• Desktop and portable personal computers requiring dual serial ports
• Peripherals such as printers and modems
• Industrial equipment operating in electrically harsh environments

Procurement Notes

Verify the specific suffix REEL7 indicates tape-and-reel packaging configuration. Confirm the E version meets the required industrial temperature range of -40°C to +85°C. Ensure the 38-lead TSSOP footprint matches the target PCB layout constraints before finalizing procurement.

Selection Notes

Select this component when a single-chip solution for two full RS-232 ports is required without external negative voltage generation. It is suitable for designs needing low standby current and high ESD protection levels. Verify that the application can accommodate the necessary external charge pump capacitors and the +12 V power supply requirement.

Part Context

This part belongs to the ADM2209 family of dual RS-232 transceivers manufactured by Analog Devices. It is designed to replace traditional multi-component solutions by integrating drivers, receivers, and charge pumps into a single CMOS IC. The device complies with EIA/TIA-232-E specifications and offers enhanced electromagnetic compatibility compared to earlier generations.

Replacement Considerations

Direct replacements include the ADM2209ARU or ADM2209ANZ variants within the same family. These parts share identical functional block diagrams and pinouts but may differ in package type or temperature rating. Verify that any substitute maintains the required 38-lead TSSOP form factor and standby functionality.