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PCA9545APWR

Name: PCA9545APWR
Rating: 4.7 (12 reviews)

IC INTERFACE SPECIALIZED 20TSSOP

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Mfr。パート #PCA9545APWR
パッケージ TSSOP (PW)-20
データシート PCA9545APWR DataSheet
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仕様

Package	Tape & Reel (TR),Cut Tape (CT)
ProductStatus	Active
Applications	Translating Switch
Interface	I²C, SMBus
Voltage-Supply	2.3V ~ 5.5V
Package/Case	20-TSSOP (0.173, 4.40mm Width)
SupplierDevicePackage	20-TSSOP

概要

Description

The PCA9545APWR is an I2C bus multiplexer that enables communication between a single master device and multiple I2C slave devices while preventing conflicts. It features five channels, allowing the selection of one of four downstream I2C buses at a time. This capability is particularly useful in applications involving multiple I2C devices with overlapping addresses.
The PCA9545APWR operates with a supply voltage range of 2.3V to 5.5V and supports standard, fast, and fast-mode plus I2C speeds. It includes built-in timing and control circuitry to manage bus arbitration and ensure reliable communication.
Key features include low power consumption, a 1 MHz maximum bus frequency, and the ability to handle I2C signals up to 5V. It is commonly used in consumer electronics, sensors, and embedded systems where multiple I2C devices need to be accessed efficiently. The device is available in a TSSOP-20 package, making it suitable for space-constrained applications.

Features

The PCA9545APWR is an I2C bus multiplexer designed to allow multiple I2C devices with the same address to coexist on the same bus. Key features include:
1. Multiplexing Capability: It supports up to 4 downstream I2C buses, allowing the selection of one bus at a time.
2. I2C Compatibility: Operates with standard I2C protocol, ensuring compatibility with a wide range of devices.
3. Voltage Range: Operates from a supply voltage of 1.8V to 5.5V, making it suitable for both low and standard voltage applications.
4. Active Low Control: Control pins allow for easy selection of the active bus through active-low signals.
5. Fast-Mode Support: Supports data rates up to 400 kHz, ideal for fast I2C devices.
6. Low Power Consumption: Designed for low power usage, making it efficient for battery-operated devices.
7. Integrated Pull-up Resistors: Built-in pull-up resistors simplify the design and reduce component count.
These features make the PCA9545APWR a versatile solution for I2C bus management in complex systems.

Package

The PCA9545APWR is packaged in a TSSOP-20 (Thin Shrink Small Outline Package) configuration. This package type is designed for surface mounting and features a compact footprint suitable for space-constrained applications.

Pinout

The PCA9545APWR is a 5-channel I²C bus multiplexer. It has a total of 16 pins.
Here are the key functions of its pins:
1. VDD (Pin 1): Power supply for the device.
2. GND (Pin 4): Ground connection.
3. SDA (Pin 2): Serial Data Line for I²C communication.
4. SCL (Pin 3): Serial Clock Line for I²C communication.
5. A0, A1, A2 (Pins 5, 6, 7): Address selection pins used to set the I²C address of the device.
6. P0 to P4 (Pins 8-12): Channel selection pins that connect to the I²C buses.
7. OE (Pin 13): Output Enable pin to activate or deactivate the I²C channels.
8. RESET (Pin 14): Reset pin to initialize the device.
9. NC (Pins 15, 16): No connection.
The multiplexer allows multiple I²C devices to share a single bus without interference.

Manufacturer

The PCA9545APWR is manufactured by NXP Semiconductors, a global semiconductor company headquartered in Eindhoven, Netherlands. NXP specializes in designing and producing a wide range of electronic components, including microcontrollers, analog, and mixed-signal devices. The company focuses on various markets such as automotive, industrial, and consumer electronics, providing technology solutions that enhance connectivity and improve efficiency in electronic systems. NXP is known for its innovations in secure connectivity and smart devices, making it a key player in the semiconductor industry.

Application

The PCA9545APWR is a I²C bus multiplexer used for expanding I²C communication capabilities. Its application areas include connecting multiple I²C devices with the same address, managing multiple sensors or peripherals in embedded systems, and facilitating communication in complex systems like industrial automation, consumer electronics, and automotive applications. It helps in reducing bus congestion and improving signal integrity in multi-device environments.

Equivalent

Equivalent products to the PCA9545APWR chip include the TCA9545A, PCA9546A, and TCA9546A. These chips serve similar functions as I2C multiplexers, allowing multiple I2C devices to communicate on the same bus. Ensure to check specifications for voltage levels and channel configurations to confirm compatibility.