Overview
The PCA9654EDR2G, produced by onsemi, is an 8-bit General Purpose parallel Input/Output (GPIO) expander designed for I2C-bus/SMBus applications. This device provides flexible I/O expansion, allowing system masters to configure the I/Os as either inputs or outputs through the I2C interface. The PCA9654EDR2G features an open-drain interrupt output that signals changes in input states, and it includes a power-on reset that initializes the device state machine and sets the registers to their default values.
The device supports a wide operating voltage range from 1.65 V to 5.5 V and is available in a SOIC-16 package. It is RoHS compliant, Pb-free, and halogen-free, making it suitable for a variety of modern electronic systems.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| VDD Operating Range | 1.65 to 5.5 | V |
| SDA Sink Capability | 30 | mA |
| I/O Pin Voltage | −0.5 to +7.0 | V |
| Supply Current (Operating Mode) | 250 to 500 | μA |
| Standby Current | 0.25 to 1 | μA |
| Low-Level Output Current (IOL) | 10 to 20 | mA |
| Input Leakage Current | −1 to 1 | μA |
| Input Capacitance | 6 to 5 | pF |
| SCL Clock Frequency | 0.1 to 1.0 | MHz |
| Storage Temperature Range | −65 to +150 | °C |
| Lead Temperature (1 mm from Case for 10 Seconds) | 260 | °C |
| Junction Temperature Under Bias | 150 | °C |
| Thermal Resistance (SOIC-16) | 82 | °C/W |
Key Features
- VDD Operating Range: 1.65 V to 5.5 V
- SDA Sink Capability: 30 mA
- 5.5 V Tolerant I/Os
- Polarity Inversion Register for active HIGH or active LOW operation
- Active LOW Interrupt Output
- Low Standby Current
- Noise Filter on SCL/SDA Inputs
- No Glitch on Power-up
- Internal Power-on Reset
- 64 Programmable Slave Addresses Using 3 Address Pins (AD0, AD1, AD2)
- 8 I/O Pins which Default to 8 Inputs
- I2C SCL Clock Frequencies Supported: Standard Mode (100 kHz), Fast Mode (400 kHz), Fast Mode + (1 MHz)
- ESD Performance: 4000 V Human Body Model, 400 V Machine Model
- Rohs Compliant, Pb-free, Halogen Free/BFR Free
Applications
The PCA9654EDR2G is suitable for a wide range of applications that require I/O expansion and flexible control over input/output operations. These include:
- Industrial Automation Systems
- Consumer Electronics
- Automotive Systems
- Medical Devices
- Embedded Systems
- IOT Devices
Its ability to support multiple slave addresses and operate over a wide voltage range makes it versatile for various design needs.
Q & A
- What is the PCA9654EDR2G used for?
The PCA9654EDR2G is an 8-bit General Purpose parallel Input/Output (GPIO) expander for I2C-bus/SMBus applications.
- What is the operating voltage range of the PCA9654EDR2G?
The operating voltage range is from 1.65 V to 5.5 V.
- How many programmable slave addresses does the PCA9654EDR2G support?
The device supports up to 64 programmable slave addresses using 3 address pins (AD0, AD1, AD2).
- What is the purpose of the interrupt output on the PCA9654EDR2G?
The interrupt output is activated when any input state differs from its corresponding input port register state, indicating to the system master that an input state has changed.
- Is the PCA9654EDR2G RoHS compliant?
- What are the supported I2C SCL clock frequencies?
The device supports Standard Mode (100 kHz), Fast Mode (400 kHz), and Fast Mode + (1 MHz).
- What is the maximum current sink capability of the SDA pin?
The SDA pin can sink up to 30 mA.
- Does the PCA9654EDR2G have internal pull-up resistors on the address pins?
No, the PCA9654EDR2G does not have internal pull-up resistors on the address pins (AD2, AD1, AD0).
- What is the thermal resistance of the SOIC-16 package?
The thermal resistance of the SOIC-16 package is 82 °C/W.
- What is the storage temperature range for the PCA9654EDR2G?
The storage temperature range is from −65°C to +150°C.
