MAX3317ECUP+

Overview

The MAX3317ECUP+ is a dual RS-232 transceiver manufactured by Analog Devices Inc./Maxim Integrated, housed in a 20-pin TSSOP package. It operates on a single supply voltage ranging from +2.25V to +3.0V and supports data rates up to 460kbps. The device features two drivers and two receivers with full-duplex communication capability. Operating supply current is typically 300µA, while shutdown mode draws less than 1µA when the SHDN pin is driven low. The receiver inputs tolerate signals up to ±25V, and the unit functions within an industrial temperature range of -40°C to +85°C.

Feature Summary

• Proprietary low-dropout transmitter output stage enables RS-232-compatible performance at voltages as low as 2.25V
• Integrated dual charge pump requires only four 0.1µF capacitors for operation
• Low-power shutdown mode reduces supply current to under 1µA while keeping receivers active for external monitoring

Applications

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

Procurement Notes

Verify the specific suffix 'C' indicates the commercial temperature grade (0°C to +70°C) or 'E' for industrial (-40°C to +85°C). Confirm the 'U' denotes the TSSOP package and 'P' signifies tube packaging. Cross-reference the exact part number against the manufacturer's official ordering guide to ensure compatibility with system power requirements and interface standards.

Selection Notes

Select this component for applications requiring minimal external capacitance and ultra-low standby power consumption. Ensure the system operates within the 2.25V to 3.0V supply range. Verify that the 460kbps maximum data rate meets the application's throughput needs. Consider the 20-pin TSSOP footprint constraints during PCB layout design.

Part Context

This device belongs to the MAX3316–MAX3319 family of 2.5V RS-232 transceivers. Unlike the MAX3318/MAX3319 which feature AutoShutdown Plus, the MAX3317 utilizes a manual shutdown control via the SHDN pin. It shares the same core architecture and capacitor requirements as its siblings but offers distinct power management flexibility through explicit hardware control.

Replacement Considerations

Public confirmed substitute part numbers include MAX3316ECUP+, MAX3318ECUP+, and MAX3319ECUP+. These variants share the same package and electrical characteristics but differ in driver/receiver counts or shutdown functionality.