MAX7315AEE+T

Overview

The MAX7315AEE+T is an I2C/SMBus-compatible 8-port I/O expander with integrated LED intensity control and interrupt capabilities. It operates within a supply voltage range of 2V to 3.6V, supporting a maximum serial clock frequency of 400kHz. Each of the eight open-drain ports can sink up to 50mA at external voltages up to 5.5V. The device features 8-bit PWM control for LEDs, combining global and individual intensity settings. It includes transition detection with interrupt output support and hot-insertion protection. The component is housed in a 16-pin QSOP package and functions reliably across a temperature range of -40°C to +125°C.

Feature Summary

• Integrated 8-bit PWM LED intensity control with global and individual adjustment capabilities
• Supports hot insertion with high-impedance inputs during power-down conditions
• Transition detection circuitry provides automatic interrupt signaling on input changes
• Pin and software compatible with PCA9534 and PCA9554(A) devices

Applications

• LCD backlighting systems
• LED status indication circuits
• Keypad backlight drivers
• RGB LED driver modules
• Portable equipment and laptop computers

Procurement Notes

Verify that the ordering suffix corresponds to the specific QSOP package variant required for the design. Confirm RoHS compliance status through official manufacturer documentation prior to finalizing procurement plans. Ensure the selected component matches the exact thermal and electrical specifications needed for the target application environment.

Selection Notes

Select this component when an I2C interface is available and GPIO expansion is required alongside direct LED driving capabilities. The 50mA per port rating allows for direct LED connection without additional transistors in many scenarios. Consider the 5.5V tolerant outputs if interfacing with higher voltage logic domains than the core supply voltage.

Part Context

This part belongs to the MAX7315 series of I/O expanders manufactured by Analog Devices / Maxim Integrated. It serves as a peripheral device to extend microprocessor I/O resources via a standard two-wire serial bus. The series is designed for applications requiring compact footprints and low standby current consumption in portable electronic devices.

Replacement Considerations

The MAX7315 is pin and software compatible with the PCA9534 and PCA9554(A). These devices may serve as functional substitutes if they meet the specific voltage and current requirements of the existing design.