Overview
The STMPE801QTR, produced by STMicroelectronics, is an 8-bit GPIO (General Purpose Input/Output) port expander designed to interface with a main digital ASIC via a two-line bidirectional I2C bus. This device is particularly useful in mobile and multimedia platforms where the limited number of GPIOs available on the digital engine needs to be expanded. The STMPE801QTR offers low power consumption and high flexibility, with each I/O configurable as either an input or an output. It also features wake-up capabilities on each I/O to optimize power usage.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Operating Voltage | 1.65 - 3.6 | V |
| I/O Voltage | 1.65 - 3.6 | V |
| Number of GPIOs | 8 | |
| I2C Clock Frequency | Up to 400 kHz | |
| Package Type | QFN16L (2.6mm x 1.8mm) | |
| Power Down Current | < 1 µA | |
| Operating Ambient Temperature | -40 to +85 | °C |
| Storage Temperature | -65 to +155 | °C |
Key Features
- 8 configurable GPIOs as inputs or outputs
- Low power consumption with wake-up feature on each I/O
- I2C interface compliant with Philips I2C specification version 2.1, supporting standard (up to 100 Kbps) and fast (up to 400 Kbps) modes
- Interrupt output pin and reset input pin
- Support for up to 2 devices sharing the same bus with one address line
- Separate supply voltage for GPIO (VIO) with level-shifting feature
- Internal POR (Power-On Reset) circuit and external reset pin
Applications
- Portable media players
- Game consoles
- Mobile phones and smartphones
- Other mobile and multimedia platforms where GPIO expansion is necessary
Q & A
- What is the primary function of the STMPE801QTR?
The primary function of the STMPE801QTR is to act as an 8-bit GPIO port expander, expanding the number of available GPIOs in a system via an I2C interface. - What is the operating voltage range of the STMPE801QTR?
The operating voltage range is 1.65V to 3.6V. - How many GPIOs does the STMPE801QTR provide?
The STMPE801QTR provides 8 GPIOs. - What is the maximum I2C clock frequency supported by the STMPE801QTR?
The maximum I2C clock frequency supported is up to 400 kHz. - What package types are available for the STMPE801QTR?
The STMPE801QTR is available in a QFN16L package (2.6mm x 1.8mm). - What is the power down current of the STMPE801QTR?
The power down current is less than 1 µA. - Can multiple STMPE801QTR devices share the same I2C bus?
Yes, up to 2 devices can share the same I2C bus with one address line. - What is the purpose of the VIO supply voltage?
The VIO supply voltage provides a level-shifting feature for the GPIOs and must be greater than or equal to VCC. - How does the reset function work on the STMPE801QTR?
The STMPE801QTR has an internal POR circuit and an external reset pin. The reset pin allows the host to reset the device directly, and the minimum pulse width of the reset signal is 100 µs. - In what applications is the STMPE801QTR typically used?
The STMPE801QTR is typically used in portable media players, game consoles, mobile phones, smartphones, and other mobile and multimedia platforms.
