MAX7313DAEG+T

Overview

The MAX7313DAEG+T is a 16-port I/O expander with an integrated I2C/SMBus interface. It operates on a supply voltage of 2V to 3.6V and supports a maximum clock frequency of 400 kHz. The device provides 16 open-drain outputs rated at 50mA each, capable of driving external loads up to 5.5V. It features an 8-bit PWM LED intensity control system with global and individual settings. The component includes transition detection for inputs and an interrupt output capability. It is housed in a 24-pin QSOP package and functions within a temperature range of -40°C to +125°C.

Feature Summary

• Integrated 8-bit PWM current drive for LED intensity control
• Supports hot insertion with high-impedance protection during power-down
• Transition detection logic with configurable interrupt output

Applications

• LCD Backlights
• LED Status Indication
• Portable Equipment
• Keypad Backlights
• RGB LED Drivers

Procurement Notes

Verify the specific DAEG suffix indicates the 24-lead QSOP package variant rather than the TQFN configuration. Confirm RoHS compliance status associated with the plus sign (+) suffix. Ensure the operating environment remains within the specified -40°C to +125°C thermal limits. Validate that the host system supports the required 2-wire serial protocol timing constraints.

Selection Notes

Select this component when 16 general-purpose I/O ports are required alongside dedicated LED brightness management. It serves as a direct pin-and-software compatible replacement for the PCA9535 and PCA9555 devices. Consider the 5.5V tolerant inputs if interfacing with higher voltage logic domains without level shifting.

Part Context

This device belongs to the MAX7313 family of I/O expanders manufactured by Analog Devices Inc./Maxim Integrated. The DAEG designation specifically identifies the 24-lead QSOP surface-mount package option. It shares functional compatibility with other members of the series while differing primarily in physical footprint and lead configuration.

Replacement Considerations

MAX7311, PCA9535, PCA9555

FAQ

How does the MAX7313 handle hot insertion?

All port pins, the INT output, SDA, SCL, and slave-address inputs remain high impedance in power-down mode with up to 6V asserted upon them.

What is the structure of the PWM intensity control?

It uses an 8-bit control scheme comprising 4 bits of global coarse adjustment and 4 bits of individual fine adjustment per output.