MAX3320ACAP

Overview

The MAX3320ACAP+ is a true RS-232 transceiver with an integrated microprocessor supervisory circuit, operating from a +3V to +5.5V supply. It features two drivers and two receivers supporting data rates up to 250kbps. The device utilizes a dual charge pump requiring four 0.1µF external capacitors. It incorporates AutoShutdown Plus technology, reducing supply current to 4µA during inactivity. The power-on reset circuit provides a minimum 100ms pulse width for the 'A' suffix variant, which has a 4.25V threshold. The component is housed in a 20-pin SSOP package.

Feature Summary

• Integrates a microprocessor supervisory circuit with an RS-232 transceiver
• Features AutoShutdown Plus for ultra-low power consumption during idle states
• Includes a power-on reset generator with guaranteed valid output down to 1V
• Operates with only four small external charge-pump capacitors

Applications

• Palmtop Computers
• Portable/Battery-Powered Equipment
• Hand-Held Equipment
• Peripherals
• Printers

Procurement Notes

Verify the specific reset threshold voltage required for the application when selecting the ordering suffix. Confirm that the 20-pin SSOP package dimensions align with the target PCB layout. Ensure the design accommodates the necessary external 0.1µF capacitors for the charge pump operation within the specified voltage range.

Selection Notes

Select this component for applications requiring combined RS-232 communication and system supervision in a compact form factor. The 'A' suffix is appropriate for systems needing a 4.25V reset threshold. Consider the 4µA shutdown current for battery-operated designs where minimizing standby power is critical. Verify logic compatibility with the host microprocessor.

Part Context

The MAX3320 belongs to the MAX3320A/B/L/T family of low-power RS-232 transceivers. This series integrates supervisory functions directly into the transceiver to save board space. The 'A' designation specifically denotes the reset threshold voltage characteristics among the available variants in this product line.

Replacement Considerations

Public confirmed substitute part numbers are not provided in the source documentation.