MAX3319CAE+T

Overview

The MAX3319CAE+T is a single-channel, full-duplex RS-232 transceiver operating from a +2.25V to +3.0V supply. It features AutoShutdown Plus technology, reducing supply current to 1µA when idle for over 30 seconds. The device supports data rates up to 460kbps with a guaranteed 4V/µs slew rate and requires only four 0.1µF capacitors for its dual charge pump. It includes a READY output indicating charge pump regulation status and an INVALID output detecting valid RS-232 levels. Packaged in a 16-pin SSOP, it operates within a -40°C to +85°C temperature range.

Feature Summary

• AutoShutdown Plus functionality automatically reduces power consumption by entering low-power shutdown mode during periods of inactivity or cable disconnection.
• Integrated dual charge pump generates required voltage levels using minimal external components, enabling operation at low supply voltages.
• INVALID output signal indicates the presence or absence of valid RS-232 receiver input levels, facilitating connection detection.

Applications

• Palmtop Computers
• Hand-Held Instruments
• Cellular Phones

Procurement Notes

Verify the component designation against official manufacturer documentation to confirm the specific suffixes correspond to the intended package type and temperature range. Ensure that ordering information aligns with current product availability and lifecycle status provided by authorized distributors. Cross-reference datasheet revisions to validate electrical characteristics prior to integration.

Selection Notes

Select this component for applications requiring low-voltage RS-232 communication with minimal standby power consumption. The MAX3319CAE+T is suitable for systems needing a single transmitter and receiver channel. Consider the 16-pin SSOP package constraints and the requirement for four external capacitors for the charge pump circuitry when designing the layout.

Part Context

This part belongs to the MAX3316–MAX3319 family of 2.5V RS-232-compatible transceivers. While sharing core architecture with other members like the MAX3316 and MAX3317, the MAX3319 specifically provides one driver and one receiver. It distinguishes itself through the inclusion of AutoShutdown Plus, unlike the basic MAX3316 which lacks automatic shutdown capabilities.

Replacement Considerations

Public confirmed substitute part numbers: MAX3319EAE+T (Extended Temperature Range).

FAQ

How does the AutoShutdown Plus feature function?

The device enters a low-power shutdown mode if no valid signal transition is detected on any receiver or transmitter input for more than 30 seconds. It wakes up automatically upon sensing a valid transition.

What is the purpose of the INVALID output?

The INVALID output asserts low when no valid RS-232 voltage levels are detected on all receiver inputs, indicating the receiver's input condition independent of force-on/off states.

What external components are required for operation?

The device requires four 0.1µF capacitors for the dual charge pump (C1–C4) to generate the necessary voltage levels for RS-232 transmission.