STMPE1601TBR

Overview

The STMPE1601TBR is a 16-bit GPIO port expander from STMicroelectronics, part of the Xpander Logic family. It interfaces via an I2C bus (up to 400 kHz) and features 16 configurable I/Os: eight operating at core supply VCC and eight at IO supply VIO. The device includes a hardware keypad controller supporting up to an 8x8 matrix with four optional dedicated keys, capable of detecting keypresses in hibernation mode. It provides four basic PWM controllers for LED brightness control and an open-drain interrupt output. Operating voltages range from 1.65V to 3.6V for both VCC and VIO. It is housed in a 25-TFBGA (3x3 mm) package.

Feature Summary

• Integrated hardware keypad controller supporting matrix scanning and hibernation wake-up
• Four independent PWM channels for backlight or LED brightness regulation
• Dual-supply architecture allowing separate voltage domains for digital core and I/Os
• Advanced power management with sleep and hibernate modes for ultra-low standby current

Applications

• Portable media players requiring expanded I/O and keypad input
• Game consoles needing low-power peripheral expansion
• Mobile and smart phones utilizing keypad and display backlight control

Procurement Notes

Verify component authenticity through authorized distributors as this part number may be subject to obsolescence. Confirm that the TFBGA25 package matches the target PCB footprint. Ensure the I2C address configuration pins are correctly terminated to prevent excessive current drain during operation. Check RoHS compliance status if required by specific environmental regulations.

Selection Notes

Select this component when a microcontroller requires additional general-purpose inputs/outputs beyond its native capacity. It is suitable for designs necessitating hardware-based keypad scanning without CPU intervention. Consider the dual-voltage requirement if the system logic operates at different levels than the I/O peripherals. Verify that the available I2C bus speed supports the required communication frequency.

Part Context

This device belongs to the STMPE series of I/O expanders designed for mobile multimedia platforms. It addresses the limitation of GPIO availability on main digital ASICs. The STMPE1601 specifically targets applications requiring integrated keypad handling and PWM outputs alongside standard GPIO expansion, reducing the need for multiple discrete components.

Replacement Considerations

Public confirmed substitute part numbers are not provided in the source documentation. Consult manufacturer resources for end-of-life alternatives.