Overview
The PCA9544APW,112 from NXP USA Inc. is a 4-channel I2C-bus multiplexer with interrupt logic. This component is designed to manage multiple I2C-bus channels, allowing for the connection of up to four downstream I2C-bus devices to a single upstream I2C-bus. The device is controlled via the I2C-bus interface and features bidirectional translating capabilities, making it versatile for various applications requiring multiple I2C-bus connections.
The PCA9544APW,112 is available in a TSSOP20 package, which is a plastic thin shrink small outline package with 20 leads, making it suitable for space-constrained designs. The device includes several key features such as power-on reset, hot insertion support, and low standby current, enhancing its reliability and efficiency in different operating conditions.
Key Specifications
| Specification | Value |
|---|---|
| Package Type | TSSOP20 |
| Number of Channels | 4 |
| Operating Power Supply Voltage | 2.3 V to 5.5 V |
| Input Voltage Tolerance | 5 V tolerant |
| Clock Frequency | 0 Hz to 400 kHz |
| ESD Protection | Exceeds 2000 V HBM per JESD22-A114 and 1000 V CDM per JESD22-C101 |
| Latch-up Testing | Exceeds 100 mA per JEDEC Standard JESD78 |
| Temperature Range | -40°C to +85°C |
| Interrupt Inputs | 4 active LOW interrupt inputs (INT0 to INT3) |
| Interrupt Output | 1 active LOW interrupt output (INT) |
Key Features
- 1-of-4 bidirectional translating multiplexer controlled via the I2C-bus interface compatible with SMBus.
- Four active LOW interrupt inputs and one active LOW interrupt output.
- Three address pins allowing up to 8 devices on the I2C-bus.
- Channel selection via I2C-bus commands.
- Power-on reset function with all multiplexer channels deselected by default.
- No glitch on power-up and supports hot insertion.
- Low standby current and low R switches.
- Voltage level translation between 1.8 V, 2.5 V, 3.3 V, and 5 V buses.
Applications
The PCA9544APW,112 is suitable for a variety of applications where multiple I2C-bus devices need to be connected to a single I2C-bus master. These include:
- Embedded systems requiring multiple sensor or actuator connections.
- Industrial automation systems where multiple devices need to be controlled via a single I2C-bus interface.
- Consumer electronics such as smart home devices, where multiple I2C-bus devices are integrated into a single system.
- Automotive systems where reliable and efficient I2C-bus communication is crucial.
Q & A
- What is the PCA9544APW,112 used for?
The PCA9544APW,112 is a 4-channel I2C-bus multiplexer used to connect multiple I2C-bus devices to a single upstream I2C-bus.
- What are the key features of the PCA9544APW,112?
Key features include 1-of-4 bidirectional translating multiplexing, I2C-bus interface compatibility, four active LOW interrupt inputs, and one active LOW interrupt output.
- What is the operating voltage range of the PCA9544APW,112?
The operating power supply voltage range is from 2.3 V to 5.5 V.
- Is the PCA9544APW,112 tolerant to 5V inputs?
- What is the clock frequency range supported by the PCA9544APW,112?
The clock frequency range is from 0 Hz to 400 kHz.
- Does the PCA9544APW,112 support hot insertion?
- What is the temperature range for the PCA9544APW,112?
The temperature range is from -40°C to +85°C.
- How many interrupt inputs and outputs does the PCA9544APW,112 have?
The device has four active LOW interrupt inputs and one active LOW interrupt output.
- What types of packages are available for the PCA9544A series?
The PCA9544A series is available in SO20, TSSOP20, and HVQFN20 packages.
- Does the PCA9544APW,112 provide voltage level translation?
