MAX3317CUP+

Overview

The MAX3317CUP+ is a dual RS-232 transceiver designed for low-voltage operation from +2.25V to +3.0V. It features two drivers and two receivers with full-duplex communication capability, supporting data rates up to 460kbps. The device utilizes a proprietary low-dropout transmitter output stage and requires only four 0.1µF capacitors for its dual charge pump. Operating supply current is typically 300µA, while shutdown mode achieves 1µA with active receivers. It operates within a commercial temperature range of 0°C to +70°C and is housed in a 20-pin TSSOP package.

Feature Summary

• Proprietary low-dropout transmitter output stage enables RS-232 compatibility at voltages as low as 2.25V
• AutoShutdown Plus feature allows automatic entry into low-power shutdown mode when idle
• Integrated dual charge pump generates required voltage levels using minimal external components
• Logic-level READY output indicates when the charge pump is regulating and the device is ready

Applications

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

Procurement Notes

Verify the specific suffix 'CUP' corresponds to the commercial temperature range (0°C to +70°C) and 20-pin TSSOP package configuration. Confirm RoHS compliance status through official manufacturer documentation or authorized distributors before procurement. Ensure ordering matches the exact part number to guarantee correct electrical characteristics and pinout alignment.

Selection Notes

Select this component for applications requiring RS-232 communication in space-constrained, battery-powered devices operating on single low-voltage supplies. The MAX3317 is suitable where manual shutdown control via the SHDN pin is preferred over the automatic AutoShutdown Plus found in other family members. Verify that the 460kbps maximum data rate meets system requirements.

Part Context

The MAX3317 belongs to the MAX3316–MAX3319 family of 2.5V RS-232-compatible transceivers manufactured by Maxim Integrated. This series shares common architecture including dual charge pumps and low-voltage operation but differs in driver/receiver counts and power management features. The MAX3317 specifically offers two drivers and two receivers with a dedicated shutdown control pin.

Replacement Considerations

Direct functional substitutes within the same family include the MAX3316CUP+ (identical specifications) and the MAX3318CUP+ (features AutoShutdown Plus instead of manual SHDN). Cross-family replacements require verification of voltage ranges, data rates, and package compatibility.