Overview
The PCA9535PW,118 is a 16-bit I²C-bus and SMBus low-power I/O port expander produced by NXP USA Inc. This device is designed to provide 16 bits of General Purpose Input/Output (GPIO) expansion, making it an ideal solution for applications requiring additional I/Os while minimizing interconnections.
The PCA9535PW operates over a wide voltage range of 2.3 V to 5.5 V and features an ultra-low standby current consumption of 1 µA (maximum). It includes three address pins (A0, A1, and A2) that allow up to eight devices to share the same I²C-bus/SMBus, enhancing flexibility in system design.
Key Specifications
| Parameter | Description |
|---|---|
| Operating Power Supply Voltage | 2.3 V to 5.5 V |
| Number of I/Os | 16 |
| Package Type | 24-TSSOP (TSSOP24) |
| Operating Temperature Range | -40°C to 85°C |
| I²C-Bus Speed | 400 kHz Fast-mode |
| Interrupt Output | Open-drain active LOW |
| Standby Current Consumption | 1 µA (maximum) |
| Logic Switching Levels | CMOS |
| Output Drive Capability | 25 mA maximum |
| RoHS Compliance | Yes |
| Halogen Free | Yes |
Key Features
- 16 bits of General Purpose Input/Output (GPIO) expansion for I²C-bus/SMBus applications.
- Operating power supply voltage range of 2.3 V to 5.5 V.
- Ultra-low standby current consumption of 1 µA (maximum).
- Schmitt-trigger action on SCL and SDA inputs for better noise immunity.
- Noise filter on SCL and SDA inputs.
- 5 V tolerant I/Os.
- 16 I/O pins that power up configured in input state.
- Open-drain active LOW interrupt output (INT).
- 400 kHz Fast-mode I²C-bus.
- Internal power-on reset with no glitch on power-up.
- Latched outputs with 25 mA drive maximum capability for directly driving LEDs.
Applications
The PCA9535PW is suitable for a variety of applications, including:
- ACPI power switches.
- Sensors.
- Push buttons.
- LEDs and fan control.
- Any system requiring additional I/Os with minimal interconnections.
Q & A
- What is the operating voltage range of the PCA9535PW?
The PCA9535PW operates over a voltage range of 2.3 V to 5.5 V.
- How many I/Os does the PCA9535PW provide?
The PCA9535PW provides 16 bits of General Purpose Input/Output (GPIO).
- What is the package type of the PCA9535PW?
The PCA9535PW is available in a 24-TSSOP (TSSOP24) package.
- What is the maximum standby current consumption of the PCA9535PW?
The maximum standby current consumption is 1 µA.
- Does the PCA9535PW support Fast-mode I²C-bus?
Yes, it supports 400 kHz Fast-mode I²C-bus.
- What is the interrupt output type of the PCA9535PW?
The interrupt output is an open-drain active LOW.
- Is the PCA9535PW RoHS compliant?
Yes, the PCA9535PW is RoHS compliant.
- Can the PCA9535PW drive LEDs directly?
Yes, it has latched outputs with a maximum drive capability of 25 mA, suitable for directly driving LEDs.
- How many devices can share the same I²C-bus/SMBus with the PCA9535PW?
Up to eight devices can share the same I²C-bus/SMBus using the three address pins (A0, A1, and A2).
- What is the operating temperature range of the PCA9535PW?
The operating temperature range is -40°C to 85°C.
- Does the PCA9535PW have internal power-on reset?
Yes, it has an internal power-on reset with no glitch on power-up.
