Datasheet > 935306698118

935306698118

更新时间： 2024-09-17 20:09:43

品牌	Logo	应用领域
恩智浦 - NXP		接口集成电路
页数	文件大小	规格书
32页	986K
描述
Interface Circuit

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技术参数
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935306698118 技术参数

生命周期：	Active	包装说明：	,
Reach Compliance Code：	unknown	风险等级：	5.61
接口集成电路类型：	INTERFACE CIRCUIT	Base Number Matches：	1

935306698118 数据手册

PCA9846

4-channel ultra-low voltage, Fm+ I²C-bus switch with reset

Rev. 1.1 — 4 April 2017

Product data sheet

1. General description

The PCA9846 is an ultra-low voltage, quad bidirectional translating switch controlled via

the I²C-bus. The SCL/SDA upstream pair fans out to four downstream pairs, or channels.

Any or all SCx/SDx channels can be selected, determined by the programmable control

the same bus. The switch device can also separate a heavily loaded I²C-bus into separate

bus segments, eliminating the need for a bus buffer.

An active LOW reset input allows the PCA9846 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 deselects all the channels, as does the internal

Power-On Reset (POR) function.

The pass gates of the switches are constructed such that the V_DD1pin is used to limit the

maximum high voltage which is passed by the PCA9846. This allows the use of different

bus voltages on each channel, so that 0.8 V, 1.8 V, 2.5 V or 3.3 V parts can communicate

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 3.6 V tolerant.

2. Features and benefits

 Ultra-low voltage operation, down to 0.8 V to interface with next-generation CPUs

 1-of-4 bidirectional translating switch

 Fm+ I²C-bus interface logic; compatible with SMBus standards

 Active LOW reset input

 2 address pins allowing up to 16 devices on the I²C-bus

 Channel selection via I²C-bus

 Power-up with all switch channels deselected

 Low R_onswitches

 Allows voltage level translation between 0.8 V, 1.8 V, 2.5 V and 3.3 V buses

 Reset via I²C-bus software command

 I²C Device ID function

 No glitch on power-up

 Supports hot insertion since all channels are de-selected at power-on

 Low standby current

12 3 4 5 6 7...32

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