Overview
The PCA9698DGG/S911,51, produced by NXP USA Inc., is a 40-bit parallel input/output (I/O) port expansion IC designed for I2C-bus applications. This advanced I/O port is organized into 5 banks of 8 I/Os, providing extensive flexibility for various system configurations. The device features a 1 MHz Fast-mode Plus I2C-bus serial interface, compliant with both Fast-mode (400 kHz) and Standard-mode (100 kHz) operations. It operates within a voltage range of 2.3 V to 5.5 V and is tolerant of 5.5 V on its I/Os. The PCA9698 is available in 56-pin TSSOP and HVQFN packages, suitable for industrial temperature ranges from −40 °C to +85 °C.
Key Specifications
| Parameter | Description |
|---|---|
| Number of I/Os | 40-bit, organized in 5 banks of 8 I/Os |
| I2C-bus Interface | 1 MHz Fast-mode Plus, compliant with Fast-mode (400 kHz) and Standard-mode (100 kHz) |
| Operating Voltage | 2.3 V to 5.5 V |
| I/O Voltage Tolerance | 5.5 V tolerant |
| Package Types | 56-pin TSSOP and HVQFN |
| Temperature Range | −40 °C to +85 °C |
| Address Configuration | Three address select pins for 64 slave addresses |
| Reset and Power-On Reset | Internal Power-On Reset (POR) and hardware reset pin (RESET) |
| Interrupt and SMBus Alert | Open-drain interrupt output pin (INT) and SMBus Alert feature |
Key Features
- GPIO All Call Command: Allows programming of multiple Advanced GPIOs simultaneously, even with different I2C-bus addresses.
- Output Enable (OE) Pin: 3-states any I/O selected as output and can be used for PWM to blink or dim LEDs.
- Device ID: Hard-coded Device ID allows the system master to read manufacturer, part type, and revision information.
- SMBus Alert Feature: Enables the connection of SMBALERT pins of multiple devices to form a wired-AND signal.
- Auto-Increment Feature: Automatically increments the 3 least significant bits after a read or write operation, facilitating sequential programming and reading of the 5 register banks.
Applications
- Industrial Automation: Suitable for industrial control systems due to its wide temperature range and robust I/O configuration.
- LED Control Systems: Ideal for LED lighting systems where the OE pin can be used for PWM to control brightness and dimming.
- Embedded Systems: Useful in embedded systems requiring extensive I/O expansion and flexible configuration options.
- Automotive Systems: Applicable in automotive electronics due to its tolerance for a wide range of operating voltages and temperatures.
Q & A
- What is the primary function of the PCA9698?
The PCA9698 provides 40-bit parallel input/output (I/O) port expansion for I2C-bus applications.
- What are the operating voltage and temperature ranges of the PCA9698?
The PCA9698 operates within a voltage range of 2.3 V to 5.5 V and is specified over the −40 °C to +85 °C industrial temperature range.
- What types of packages are available for the PCA9698?
The PCA9698 is available in 56-pin TSSOP and HVQFN packages.
- How does the GPIO All Call command work?
The GPIO All Call command allows programming of multiple Advanced GPIOs at the same time, even if they have different I2C-bus addresses.
- What is the purpose of the Output Enable (OE) pin?
The OE pin 3-states any I/O selected as output and can be used as an input signal to blink or dim LEDs using PWM.
- How does the SMBus Alert feature work?
The SMBus Alert feature allows the SMBALERT pins of multiple devices to be connected together to form a wired-AND signal.
- What is the function of the internal Power-On Reset (POR) and hardware reset pin (RESET)?
The internal Power-On Reset (POR) or hardware reset pin (RESET) initializes the 40 I/Os as inputs.
- How many slave addresses can be configured using the address select pins?
Three address select pins configure one of 64 slave addresses.
- What is the purpose of the Auto-Increment feature?
The Auto-Increment feature automatically increments the 3 least significant bits after a read or write operation, facilitating sequential programming and reading of the 5 register banks.
- Can the PCA9698 be used in automotive systems?
Yes, the PCA9698 is applicable in automotive electronics due to its tolerance for a wide range of operating voltages and temperatures.
