MAX3317ECAP+T

Overview

The MAX3317ECAP+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 features a proprietary low-dropout transmitter output stage with a dual-charge pump. The device provides two drivers and two receivers, supporting data rates up to 460kbps. It includes a 1µA shutdown mode where receivers remain active for external monitoring. ESD protection is rated at ±15kV (Human Body Model) and ±8kV (IEC Contact Discharge). It is housed in a 20-pin SSOP package and operates within a temperature range of -40°C to +85°C.

Feature Summary

• Integrates a dual-charge pump voltage converter requiring only four 0.1µF capacitors for operation.
• Features a low-power shutdown mode that reduces supply current to 1µA while keeping receivers active.
• Provides robust electrostatic discharge protection on all RS-232 I/O pins.

Applications

• Palmtop Computers
• Hand-Held Instruments
• GPS Systems

Procurement Notes

Verify the specific ordering suffix against official documentation to confirm package type and temperature range. Confirm RoHS compliance status as indicated in the datasheet. Ensure the component source is an authorized distributor or manufacturer representative to guarantee authenticity and traceability.

Selection Notes

Select this component when designing low-voltage RS-232 interfaces requiring minimal external capacitance. It is suitable for applications needing extended standby battery life due to its ultra-low shutdown current. Verify that the system power supply falls within the specified +2.25V to +3.0V operating range.

Part Context

This part belongs to the MAX3316–MAX3319 series of 2.5V RS-232-compatible transceivers. The MAX3317 variant specifically offers manual shutdown control via the SHDN pin, distinguishing it from the AutoShutdown Plus features found in the MAX3318 and MAX3319 models within the same family.

Replacement Considerations

Compatible alternatives include MAX3316EAP+T and MAX3317EUP+T. These parts share identical electrical characteristics but differ in package style (SSOP vs. TSSOP) or commercial/industrial temperature ratings. Verify pin compatibility before substitution.

FAQ

How does the MAX3317 shutdown mode differ from the AutoShutdown Plus feature?

The MAX3317 requires the SHDN pin to be driven low to enter shutdown mode. In contrast, the MAX3318/MAX3319 use AutoShutdown Plus, which automatically enters shutdown after 30 seconds of inactivity without external control signals.

What is the minimum number of external capacitors required for the charge pump?

The device requires exactly four 0.1µF capacitors (C1–C4) to operate the internal dual-charge pump voltage converter.