PCA9545CPW

更新时间： 2024-09-18 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

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技术参数
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替代型号

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PCA9545CPW 技术参数

是否无铅：	不含铅	是否Rohs认证：	符合
生命周期：	Obsolete	零件包装代码：	TSSOP
包装说明：	TSSOP,	针数：	20
Reach Compliance Code：	compliant	HTS代码：	8542.39.00.01
风险等级：	5.14	其他特性：	ALSO OPERATES WITH 4.5 TO 5.5V SUPPLY
系列：	9545	JESD-30 代码：	R-PDSO-G20
JESD-609代码：	e4	长度：	6.5 mm
逻辑集成电路类型：	MULTIPLEXER	湿度敏感等级：	1
功能数量：	1	输入次数：	4
输出次数：	1	端子数量：	20
最高工作温度：	85 °C	最低工作温度：	-40 °C
输出特性：	OPEN-DRAIN	输出极性：	TRUE
封装主体材料：	PLASTIC/EPOXY	封装代码：	TSSOP
封装形状：	RECTANGULAR	封装形式：	SMALL OUTLINE, THIN PROFILE, SHRINK PITCH
峰值回流温度（摄氏度）：	260	传播延迟（tpd）：	0.3 ns
认证状态：	Not Qualified	座面最大高度：	1.1 mm
最大供电电压 (Vsup)：	3.6 V	最小供电电压 (Vsup)：	2.3 V
标称供电电压 (Vsup)：	3.3 V	表面贴装：	YES
温度等级：	INDUSTRIAL	端子面层：	Nickel/Palladium/Gold (Ni/Pd/Au)
端子形式：	GULL WING	端子节距：	0.65 mm
端子位置：	DUAL	处于峰值回流温度下的最长时间：	30
宽度：	4.4 mm	Base Number Matches：	1

PCA9545CPW 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

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PCA9545CPW 替代型号

型号	品牌	替代类型	描述	数据表
PCA9545BPW	NXP	功能相似	4-channel I2C-bus switch with interrupt logic and reset
PCA9545APWT	TI	功能相似	4-CHANNEL I2C AND SMBus SWITCH WITH INTERRUPT LOGIC AND RESET FUNCTIONS

与PCA9545CPW相关器件

型号	品牌	获取价格	描述	数据表
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
PCA9546A_1	TI	获取价格	4-CHANNEL I2C AND SMBus SWITCH WITH RESET FUNCTION
PCA9546A_2	TI	获取价格	4-CHANNEL I2C AND SMBus SWITCH WITH RESET FUNCTION
PCA9546A_3	TI	获取价格	4-CHANNEL I2C AND SMBus SWITCH WITH RESET FUNCTION

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