PCA9545B

更新时间： 2024-11-07 10:17:07

品牌	Logo	应用领域
恩智浦 - NXP		开关
页数	文件大小	规格书
28页	152K
描述
4-channel I2C-bus switch with interrupt logic and reset

阅读下载

中文翻译

获取价格

数据手册

如果您发现信息不准确，欢迎纠错

PCA9545B 数据手册

PCA9545A/45B/45C

4-channel I²C-bus switch with interrupt logic and reset

Rev. 07 — 19 June 2009

Product data sheet

1. General description

The PCA9545A/45B/45C 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 SCx/SDx channel or combination of channels can be selected, determined by

the contents of the programmable control register. Four interrupt inputs, INT0 to INT3, one

for each of the downstream pairs, are provided. One interrupt output, INT, acts as an AND

of the four interrupt inputs.

An active LOW reset input allows the PCA9545A/45B/45C to recover from a situation

where one of the downstream I²C-buses is stuck in a LOW state. Pulling the RESET pin

LOW resets the I²C-bus 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 V_DDpin can be used to limit

the maximum high voltage which will be passed by the PCA9545A/45B/45C. This allows

the use of different bus voltages on each pair, so that 1.8 V or 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 pins are 5 V tolerant.

The PCA9545A, PCA9545B and PCA9545C are identical except for the ﬁxed portion of

the slave address.

2. Features

I 1-of-4 bidirectional translating switches

I I²C-bus interface logic; compatible with SMBus standards

I 4 active LOW interrupt inputs

I Active LOW interrupt output

I Active LOW reset input

I 2 address pins allowing up to 4 devices on the I²C-bus

I Alternate address versions A, B and C allow up to a total of 12 devices on the bus for

larger systems or to resolve address conﬂicts

I Channel selection via I²C-bus, in any combination

I Power-up with all switch channels deselected

I Low R_onswitches

I Allows voltage level translation between 1.8 V, 2.5 V, 3.3 V and 5 V buses

I No glitch on power-up

I Supports hot insertion

I Low standby current

I Operating power supply voltage range of 2.3 V to 5.5 V

12 3 4 5 6 7...28

中文翻译

下载PDF

与PCA9545B相关器件

型号	品牌	获取价格	描述	数据表
PCA9545BPW	NXP	获取价格	4-channel I2C-bus switch with interrupt logic and reset
PCA9545C	NXP	获取价格	4-channel I2C-bus switch with interrupt logic and reset
PCA9545CPW	NXP	获取价格	4-channel I2C-bus switch with interrupt logic and reset
PCA9545D	NXP	获取价格	4-channel I2C switch with interrupt logic and reset
PCA9545D-T	NXP	获取价格	IC 9545 SERIES, 4 LINE TO 1 LINE MULTIPLEXER, TRUE OUTPUT, PDSO20, 7.50 MM, PLASTIC, MS-01
PCA9545PW	NXP	获取价格	4-channel I2C switch with interrupt logic and reset
PCA9545PW-T	NXP	获取价格	IC 9545 SERIES, 4 LINE TO 1 LINE MULTIPLEXER, TRUE OUTPUT, PDSO20, 4.40 MM, PLASTIC, MO-15
PCA9546	NXP	获取价格	4-channel I2C switch with reset
PCA9546A	NXP	获取价格	4-channel I2C switch with reset
PCA9546A	TI	获取价格	4-CHANNEL I2C AND SMBus SWITCH WITH RESET FUNCTION

与PCA9545B相关文章

英伟达新AI芯片Rubin或提前半年亮相
2024-11-05

18
苹果iPhone 17将全系采用三星/LG显示LTPO OLED面板
2024-11-05

15
三星深化印度制造布局，供应链本地化进程加速
2024-10-29

38
芯擎科技“星辰一号”自动驾驶芯片点亮成功，2025年量产在即
2024-10-29

36

产品中心

服务支持

精选活动

关于我们

帮助中心

PCA9545B

PCA9545B 数据手册

与PCA9545B相关器件

与PCA9545B相关文章

您还可以找

产品中心

服务支持

精选活动

关于我们

帮助中心

PCA9545B

PCA9545B 数据手册

与PCA9545B相关器件

与PCA9545B相关文章

您还可以找

您在本页遇到什么问题？