MAX7317ATE+T

Overview

The MAX7317ATE+T is a 10-port SPI-interfaced I/O expander from Analog Devices/Maxim Integrated, housed in a 16-pin TQFN-EP package. It operates on a supply voltage of 2.25V to 3.6V with a maximum clock frequency of 26MHz. The device provides 10 configurable I/O ports rated for 7V, supporting hot insertion with up to 8V asserted during power-down. Standby current ranges from 0.7µA (typical) to 1.9µA (maximum). It functions within an operating temperature range of -40°C to +125°C and includes an exposed pad connected to GND.

Feature Summary

• Industry-standard 4-wire serial interface compatible with SPI, QSPI, and MICROWIRE protocols
• I/O ports feature overvoltage protection up to 7V independent of the supply voltage
• Supports hot insertion with high-impedance state maintained when powered down
• Low standby current consumption reduces board size and power-supply requirements

Applications

• Portable Equipment
• Cellular Phones
• White Goods
• Industrial Controllers
• System Monitoring

Procurement Notes

Verify the component matches the specific 16-pin TQFN-EP package configuration and lead-free/RoHS compliance indicated by the '+' suffix. Confirm that the ordering suffix does not alter the electrical function or pinout unless explicitly documented in the manufacturer's official datasheet. Ensure the supplier provides traceable documentation for the Analog Devices/Maxim Integrated brand.

Selection Notes

Select this component when a microprocessor requires expansion of I/O lines via a standard serial interface without architecture restrictions. It is suitable for applications needing open-drain outputs capable of level translation up to 7V. Consider the low standby current and small footprint if space and power efficiency are critical constraints in the design.

Part Context

The MAX7317 belongs to the MAX7317 series of general-purpose GPIO peripherals. It is designed to provide flexible input/output control through a high-speed serial interface. The device simplifies system design by allowing individual port configuration as inputs or open-drain outputs, making it a versatile solution for expanding digital connectivity in embedded systems.

Replacement Considerations

For applications requiring constant-current outputs and PWM controls, refer to the MAX6966/MAX6967 data sheet. These devices offer similar functionality but include additional features for driving displays or LEDs, differing significantly in output architecture compared to the MAX7317.