PCA9545A - 具有中断逻辑和复位功能的 4 通道 I2C 和 SMBus 多路复用器

PCA9545A是TI德州仪器公司的一款I2C多路复用器、开关产品，PCA9545A是具有中断逻辑和复位功能的 4 通道 I2C 和 SMBus 多路复用器，本站介绍了PCA9545A的封装应用图解、特点和优点、功能等，并给出了与PCA9545A相关的TI元器件型号供参考。

PCA9545A - 具有中断逻辑和复位功能的 4 通道 I2C 和 SMBus 多路复用器 - I2C多路复用器、开关 - I2C - 德州仪器

产品描述

The PCA9545A is a quad bidirectional translating switch controlled via the I2C bus. The SCL/SDA upstream pair fans out to four downstream pairs, or channels. Any individual SCn/SDn channel or combination of channels can be selected, determined by the contents of the programmable control register. Four interrupt inputs (INT3–INT0), one for each of the downstream pairs, are provided. One interrupt (INT) output acts as an AND of the four interrupt inputs.

An active-low reset (RESET) input allows the PCA9545A to recover from a situation in which one of the downstream I2C buses is stuck in a low state. Pulling RESET low resets the I2C state machine and causes all the channels to be deselected, as does the internal power-on reset function.

The pass gates of the switches are constructed such that the VCC terminal can be used to limit the maximum high voltage, which will be passed by the PCA9545A. This allows the use of different bus voltages on each pair, so that 1.8-V, 2.5-V, or 3.3-V parts can communicate with 5-V parts, without any additional protection. External pull-up resistors pull the bus up to the desired voltage level for each channel. All I/O terminals are 5.5 V tolerant.

产品特性

1-of-4 Bidirectional Translating Switches
I2C Bus and SMBus Compatible
Four Active-Low Interrupt Inputs
Active-Low Interrupt Output
Active-Low Reset Input
Two Address Terminals, Allowing up to Four Devices on the I2C Bus
Channel Selection via I2C Bus, in Any Combination
Power-Up With All Switch Channels Deselected
Low RON Switches
Allows Voltage-Level Translation Between 1.8-V, 2.5-V, 3.3-V, and 5-V Buses
No Glitch on Power-Up
Supports Hot Insertion
Low Standby Current
Operating Power-Supply Voltage Range of 2.3 V to 5.5 V
5.5 V Tolerant Inputs
0 to 400-kHz Clock Frequency
Latch-Up Performance Exceeds 100 mA per JESD 78
ESD Protection Exceeds JESD 22
- 2000-V Human-Body Model (A114-A)
- 1000-V Charged-Device Model (C101)

下面可能是您感兴趣的TI德州仪器公司I2C多路复用器、开关元器件

TI公司产品现货专家，订购TI公司产品不限最低起订量，TI芯片大陆现货即时发货，香港库存3-5天发货，海外库存7-10天发货

寻找全球TI代理商现货货源 - TI公司（德州仪器）电子元件在线订购