MAX3317EEUP+T

Overview

The MAX3317EEUP+T is a dual RS-232 transceiver from the MAX3316–MAX3319 family, manufactured by Analog Devices Inc./Maxim Integrated. It operates on a single +2.25V to +3.0V supply and utilizes a proprietary low-dropout transmitter output stage with a dual-charge pump voltage converter. The device provides two drivers and two receivers, supporting data rates up to 460kbps. It features a 1µA shutdown mode accessible via the SHDN pin, during which receivers remain active for external monitoring. The component includes an internal READY signal indicating charge pump regulation status and is housed in a 20-pin TSSOP package.

Feature Summary

• Proprietary low-dropout transmitter output stage enabling RS-232-compatible performance at low voltages
• Integrated dual-charge pump voltage converter requiring only four 0.1µF capacitors
• Low-power shutdown mode with active receivers for peripheral monitoring
• READY logic-level output indicating charge pump regulation and transmission readiness

Applications

• Palmtop Computers
• Hand-Held Instruments
• Cellular Phones
• GPS Devices
• Handy Terminals

Procurement Notes

Verify the specific suffix EEUP+T against the manufacturer's current ordering information to confirm the exact temperature range and packaging configuration. Ensure compatibility with the system's power management unit regarding the READY signal assertion levels. Confirm that the 20-pin TSSOP footprint matches the design layout requirements.

Selection Notes

Select this component when designing systems powered by a single 2.5V source requiring full-duplex RS-232 communication. The MAX3317 is appropriate where receiver activity must be maintained during low-power states. Compare against the MAX3318 or MAX3319 if automatic AutoShutdown Plus functionality without external control signals is preferred over manual shutdown control.

Part Context

This part belongs to the MAX3316–MAX3319 series of 2.5V RS-232 transceivers. While sharing the core charge pump and driver architecture, the MAX3317 differs from the MAX3318/MAX3319 by utilizing a manual SHDN pin rather than the AutoShutdown Plus feature. It shares the 2-Tx/2-Rx configuration with the MAX3316 but offers distinct power management control options.

Replacement Considerations

The MAX3316EUP+T serves as a functional substitute within the same package and electrical specifications, differing primarily in the absence of the READY output pin found on the MAX3317.