MAX7313AEG+

Overview

The MAX7313AEG+ is a 16-port I/O expander with integrated LED intensity control, interrupt generation, and hot-insertion protection. It operates on a 2V to 3.6V supply voltage and features an I²C/SMBus serial interface supporting up to 400kHz clock frequency. The device provides 16 open-drain current-sinking outputs rated at 50mA each, capable of driving external loads up to 5.5V independent of the logic supply. A 17th port serves as an interrupt output or general-purpose output. PWM intensity control utilizes an 8-bit configuration comprising global and individual per-output settings. The component supports transition detection for input ports and operates within a temperature range of -40°C to +125°C.

Feature Summary

• Integrated 8-bit PWM control for LED intensity adjustment with global and individual output settings
• Hot-insertion protection allowing high-impedance state during power-down conditions
• Transition detection capability on all input ports triggering an interrupt output
• Two-phase LED blinking functionality with independent timing control

Applications

• LCD backlighting systems
• LED status indication circuits
• Portable equipment power management
• Keypad backlight drivers
• RGB LED driver arrays

Procurement Notes

Verify the specific ordering suffix 'AEG+' corresponds to the 24-pin QSOP package variant when sourcing components. Confirm that the lead-free and RoHS-compliant designation matches project environmental requirements. Ensure the supplier documentation references the correct datasheet revision to validate electrical characteristics against design specifications.

Selection Notes

Select this component when a microprocessor requires expanded GPIO capabilities alongside direct LED drive functions without external transistors. The 50mA sink current per port eliminates the need for additional buffering in low-power indicator applications. Verify that the system bus voltage tolerance aligns with the 5.5V rating on SDA, SCL, and I/O pins to ensure compatibility with higher-voltage logic levels.

Part Context

This device belongs to the MAX731x family of I/O expanders manufactured by Analog Devices Inc./Maxim Integrated. It maintains pin and software compatibility with the MAX7311, PCA9535, and PCA9555, facilitating direct upgrades or replacements in existing designs requiring enhanced LED control features while retaining standard I²C communication protocols.

Replacement Considerations

The MAX7313AEG+ is functionally compatible with the MAX7311, PCA9535, and PCA9555 regarding pinout and software registers. When substituting these parts, verify that the alternative device supports the required 50mA sink current and 5.5V I/O voltage tolerance to maintain circuit integrity.