Datasheet > NCA9545

NCA9545

更新时间： 2024-04-09 19:03:01

品牌	Logo	应用领域
纳芯微 - NOVOSENSE		开关
页数	文件大小	规格书
20页	3390K
描述
NCA9545是通过I2C总线控制的四路双向转换开关。 SCL / SDA上行数据分散到四对下行数据或通道。可以选择任何单个SCN / SDN通道或通道组合，具体取决于可编程控制寄存器的内容。提供

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NCA9545 数据手册

NCA9545

4-channel I2C-bus switch with

interrupt logic and reset

Datasheet (EN) 1.3



Allows Voltage-Level Translation Between 1.8-V, 2.5-V,

3.3-V, and 5-V Buses

Product Overview

The NCA9545 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.



No Glitch on Power-Up

Supports Hot Insertion

Low Standby Current

Operating Power-Supply Voltage Range of 1.65 V to 5.5



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

An active-low reset (RESET) input allows the NCA9545 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.

– 2000-V Human-Body Model (A114-A)

– 1000-V Charged-Device Model (C101)

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 NCA9545. 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.

Applications



Servers

Routers (Telecom Switching Equipment)

Factory Automation

Products With I²C Slave Address Conflicts (e.g. Multiple,

Identical Temp Sensors)

Key Features

Device Information



1-of-4 Bidirectional Translating Switches

I²C Bus and SMBus Compatible

Four Active-Low Interrupt Inputs

Active-Low Interrupt Output

Active-Low Reset Input

Part Number

NCA9545-DTSR

Package

TSSOP20

Body Size

6.5mm*4.5mm

Functional Block Diagrams

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 R_ONSwitches

Figure 1. NCA9545 BlockDiagram

12 3 4 5 6 7...20

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与NCA9545相关器件

型号	品牌	描述	获取价格	数据表
NCA9546	NOVOSENSE	NCA9546是通过I2C总线控制的四路双向转换开关。 SCL / SDA上行数据分散到四	获取价格
NCA9548	NOVOSENSE	NCA9548是通过I2C总线控制的八路双向转换开关。 SCL / SDA上行数据分散到八	获取价格
NCA9555	NOVOSENSE	NCA9555是一款24引脚CMOS器件，提供16位通用并行I2C总线数输入/输出GPIO	获取价格
NCA9555B	NOVOSENSE	NCA9555B是一款24引脚CMOS器件，提供16位通用并行I2C总线数输入/输出GPI	获取价格
NCA9555BY	NEXPERIA	Low-voltage 16-bit I²C and SMBus I/O expander	获取价格
NCA9555BY-Q100	NEXPERIA	Low-voltage 16-bit I²C and SMBus I/O expander	获取价格

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