MAX3320AEAP

Overview

The MAX3320AEAP is a dual RS-232 transceiver integrated with a microprocessor power-on reset circuit, manufactured by Analog Devices Inc. (Maxim Integrated). It operates on a single +3V to +5.5V supply and achieves up to 250kbps data rates using an internal dual charge pump requiring only four 0.1µF external capacitors. The device features AutoShutdown Plus technology, reducing supply current to 4µA during inactivity while keeping receivers active. It includes a precise power-on reset function with a minimum 100ms pulse width and guarantees valid reset output down to VCC = 1V. The component is housed in a 20-pin SSOP package and supports an operating temperature range of -40°C to +85°C.

Feature Summary

• Integrates a true RS-232 transceiver with a dedicated microprocessor power-on reset supervisor for simplified system design.
• Features AutoShutdown Plus functionality that reduces supply current to 4µA when no activity is detected, while maintaining active receiver monitoring.
• Provides a guaranteed 100ms minimum power-on reset pulse width with immunity to fast supply voltage transients.
• Utilizes a proprietary low-dropout transmitter stage to deliver full RS-232 performance from a single low-voltage supply.

Applications

• Palmtop Computers
• Portable and Battery-Powered Equipment
• Hand-Held Equipment
• Peripherals

Procurement Notes

Verify the specific suffix 'EAP' corresponds to the industrial temperature range (-40°C to +85°C) and the 20-pin SSOP package configuration. Confirm the 'A' reset threshold selection matches the target application's voltage requirements. Ensure compatibility with existing PCB footprints and check for any end-of-life status updates from the manufacturer before finalizing procurement plans.

Selection Notes

Select this component when a combined RS-232 interface and power management solution is required for space-constrained designs. The MAX3320AEAP is suitable for systems needing low standby power consumption via AutoShutdown Plus. Verify that the required reset threshold voltage aligns with the 'A' suffix specifications. Consider the 20-pin SSOP footprint constraints during layout planning.

Part Context

The MAX3320 series integrates RS-232 communication capabilities with power supervision functions. The 'AEAP' designation specifically indicates the variant with the 'A' reset threshold, 'E' extended temperature range, and 'AP' indicating the 20-pin SSOP package type. This integration allows designers to reduce component count and board space in portable applications compared to discrete solutions.

Replacement Considerations

Direct functional replacements within the same family include MAX3320BEAP, MAX3320LEAP, and MAX3320TEAP, which differ primarily in their reset threshold voltages. Cross-family alternatives may require evaluation of pin compatibility and feature sets such as AutoShutdown Plus availability.