Overview
The PCA9555RGER is a 16-bit I2C and SMBus I/O expander produced by Texas Instruments. This device is designed to provide general-purpose remote I/O expansion for most microcontroller families via the I2C interface. It operates within a voltage range of 2.3-V to 5.5-V and is packaged in a 24-pin VQFN (RGE) package. The PCA9555RGER is part of the NXP Semiconductors family of I2C-bus I/O expanders, enhanced with features such as higher drive capability, 5-V I/O tolerance, and lower supply current.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Package Type | VQFN (RGE) | - |
| Pins | 24 | - |
| Operating Temperature Range | -40 to 85 | °C |
| Supply Voltage Range | 2.3 to 5.5 | V |
| I2C Bus Speed | 400 kHz | - |
| Standby Current Consumption | 1 μA Max | - |
| ESD Protection | 2000-V Human-Body Model, 200-V Machine Model, 1000-V Charged-Device Model | - |
| Latch-Up Performance | Exceeds 100 mA Per JESD 78, Class II | - |
Key Features
- Low Standby-Current Consumption of 1 μA Max
- I2C to Parallel Port Expander
- Open-Drain Active-Low Interrupt Output
- 5-V Tolerant I/O Ports
- Compatible With Most Microcontrollers
- 400-kHz Fast I2C Bus
- Address by Three Hardware Address Pins for Use of up to Eight Devices
- Polarity Inversion Register
- Latched Outputs With High-Current Drive Capability for Directly Driving LEDs
- ESD Protection Exceeds JESD 22
Applications
- Servers
- Routers (Telecom Switching Equipment)
- Personal Computers
- Personal Electronics
- Industrial Automation Equipment
- Products with GPIO-Limited Processors
Q & A
- What is the PCA9555RGER used for? The PCA9555RGER is used for general-purpose remote I/O expansion for most microcontroller families via the I2C interface.
- What is the operating voltage range of the PCA9555RGER? The operating voltage range is 2.3-V to 5.5-V.
- What type of package does the PCA9555RGER come in? It comes in a 24-pin VQFN (RGE) package.
- What is the maximum standby current consumption of the PCA9555RGER? The maximum standby current consumption is 1 μA.
- Does the PCA9555RGER support fast I2C bus speeds? Yes, it supports a 400-kHz fast I2C bus.
- How many devices can be addressed using the PCA9555RGER? Up to eight devices can be addressed using three hardware address pins.
- What kind of ESD protection does the PCA9555RGER have? It has ESD protection exceeding JESD 22 standards, including 2000-V Human-Body Model, 200-V Machine Model, and 1000-V Charged-Device Model.
- Can the PCA9555RGER drive LEDs directly? Yes, it has latched outputs with high-current drive capability for directly driving LEDs.
- What is the latch-up performance of the PCA9555RGER? It exceeds 100 mA per JESD 78, Class II.
- What are some common applications of the PCA9555RGER? Common applications include servers, routers, personal computers, personal electronics, and industrial automation equipment.
