MAX3317ECUP+T

Overview

The MAX3317ECUP+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 includes an internal dual charge pump generating ±4.4V and -4.3V rails. The device features two drivers and two receivers with a guaranteed data rate of 460kbps. Operating supply current is typically 300µA, while shutdown mode draws less than 1µA when the SHDN pin is driven low. Receivers remain active during shutdown for external monitoring. It utilizes four 0.1µF capacitors and is housed in a 20-pin TSSOP package.

Feature Summary

• Proprietary low-dropout transmitter output stage enables RS-232-compatible performance at low voltages
• Internal dual charge pump generates required voltage levels using only four small capacitors
• Low-power shutdown mode reduces supply current to under 1µA while keeping receivers active
• Guaranteed high-speed operation up to 460kbps with controlled slew rates

Applications

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

Procurement Notes

Verify the component authenticity through official manufacturer channels or authorized distributors. Confirm the specific suffix 'E' indicates the extended temperature range (-40°C to +85°C) and 'UP' denotes the 20-pin TSSOP package. Ensure the '+T' designation matches the required reel packaging format for your assembly line. Cross-reference the datasheet revision to confirm pinout and electrical characteristics align with your design requirements.

Selection Notes

Select this component when designing portable systems requiring RS-232 communication with minimal power consumption. It is suitable for applications needing receiver monitoring during sleep states. Compare against MAX3316 if a READY signal is not needed, or MAX3318/MAX3319 if automatic cable-disconnect detection is preferred over manual shutdown control. Ensure the system voltage stays within the 2.25V to 3.0V range for optimal performance.

Part Context

This part belongs to the MAX3316–MAX3319 series of 2.5V RS-232 transceivers. The MAX3317 specifically offers manual shutdown control via the SHDN pin, distinguishing it from the AutoShutdown Plus variants (MAX3318/3319). It serves as a low-voltage alternative to traditional 5V RS-232 interfaces, reducing system complexity and power usage in battery-operated devices.

Replacement Considerations

Public confirmed substitute part numbers: MAX3316EUP+T, MAX3318EUP+T, MAX3319EAE+T.