MAX7314ATG+T

Overview

The MAX7314ATG+T is an I2C-compatible serial interfaced peripheral providing 16 configurable I/O ports plus one output-only port and one input-only port. It operates on a supply voltage of 2V to 3.6V with outputs rated for external supplies up to 5.5V. Each I/O port supports open-drain current-sinking outputs rated at 50mA or logic inputs with transition detection. The device features an 8-bit PWM current control system, including global and individual intensity controls, and supports two-phase LED blinking. It includes hot-insertion protection, allowing pins to remain high-impedance during power-down with up to 6V asserted. The component utilizes a 400kbps 2-wire serial interface and is housed in a 24-pin Thin QFN package measuring 4mm x 4mm.

Feature Summary

• Integrated 8-bit PWM current control with global and individual intensity settings for LED applications
• Supports hot insertion with high-impedance state maintenance during power-down conditions
• Configurable interrupt output with transition detection capabilities for input monitoring
• Dual-phase LED blinking functionality controlled via hardware or software registers

Applications

• LCD Backlights
• LED Status Indication
• Relay Drivers
• Keypad Backlights
• RGB LED Drivers

Procurement Notes

Verify the specific ordering suffix against manufacturer documentation to confirm package type and temperature range. Ensure the procurement channel provides original manufacturer packaging to maintain component integrity. Cross-reference the part number with official Analog Devices databases to validate authenticity and revision status before integration into production systems.

Selection Notes

Select this component when designing systems requiring GPIO expansion alongside integrated LED brightness control. The 5.5V tolerant outputs allow driving loads independent of the core logic supply voltage. Consider the 400kHz I2C speed and low standby current for battery-operated devices. Verify that the required number of ports and interrupt lines align with the device's 18-port configuration.

Part Context

The MAX7314 belongs to the Maxim Integrated family of I/O expanders designed for microprocessor peripherals. It complements other models like the MAX7313 by adding dedicated LED intensity control and hot-insertion protection features. This series targets applications needing flexible I/O management with simplified LED driving capabilities without external controllers.

Replacement Considerations

The MAX7313ATG+T offers similar I2C connectivity but lacks the integrated PWM LED intensity control and hot-insertion protection found in the MAX7314. Substitution requires verifying if the application necessitates the additional LED control features and thermal protection specifications provided by the MAX7314 architecture.