Overview
The PCA9536D is a 4-bit I2C-bus and SMBus I/O port expander manufactured by Texas Instruments. This device is designed to provide general-purpose remote I/O expansion for most microcontroller families through the I2C interface. It operates within a voltage range of 2.3V to 5.5V and is available in an 8-pin SOIC package. The PCA9536D features configuration, input, output, and polarity inversion registers, allowing for flexible I/O configuration and control.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| VDD Supply Voltage | 2.3 | - | 5.5 | V |
| IDD Supply Current (Operating Mode) | - | 290 | 400 | μA |
| Istb Standby Current | - | 225 | 350 | μA |
| VPOR Power-on Reset Voltage | 1.7 | - | 2.2 | V |
| Ci Input Capacitance | - | 3.7 | 5 | pF |
| Co Output Capacitance | - | 3.7 | 5 | pF |
| Tamb Ambient Temperature | -40 | - | 85 | °C |
| Tj(max) Maximum Junction Temperature | - | - | 125 | °C |
Key Features
- Available in the Texas Instruments NanoFree™ package
- Low standby current consumption of 1 μA Max
- I2C to parallel port expander
- Operating power-supply voltage range of 2.3V to 5.5V
- 5-V tolerant I/O ports
- 400-kHz fast I2C Bus
- Input/Output configuration register
- Polarity inversion register
- Internal power-on reset
- No glitch on power-up
- Power-up with all channels configured as inputs
- Noise filter on SCL/SDA inputs
- Latched outputs with high-current drive, maximum capability for directly driving LEDs
- Latch-up performance exceeds 100 mA per JESD 78, Class II
- ESD protection exceeds JESD 22
Applications
The PCA9536D is suitable for various applications requiring additional I/O expansion, such as:
- ACPI power switches
- Sensors
- Push buttons
- LEDs
- Fans
- General-purpose I/O expansion for microcontrollers
Q & A
- What is the operating voltage range of the PCA9536D?
The PCA9536D operates within a voltage range of 2.3V to 5.5V.
- What type of interface does the PCA9536D use?
The PCA9536D uses the I2C and SMBus interface for communication.
- How many bits of I/O expansion does the PCA9536D provide?
The PCA9536D provides 4 bits of general-purpose parallel I/O expansion.
- What is the standby current consumption of the PCA9536D?
The standby current consumption of the PCA9536D is a maximum of 1 μA.
- Does the PCA9536D have ESD protection?
- How are the I/Os configured at power-on?
- Can the PCA9536D drive LEDs directly?
- What is the maximum junction temperature for the PCA9536D?
- Does the PCA9536D have a power-on reset feature?
- What is the typical input capacitance of the PCA9536D?
