PCA9543A 데이터 시트보기 (PDF) - Philips Electronics

부품명

상세내역

일치하는 목록

PCA9543A

2-channel I2C switch with interrupt logic and reset

Philips Electronics 

PCA9543A

2-channel I2C switch with interrupt logic and reset

Rev. 03 — 21 March 2005

Product data sheet

1. General description

The PCA9543A is a bi-directional translating switch, controlled by the I2C-bus. The

SCL/SDA upstream pair fans out to two downstream pairs, or channels. Any individual

SCx/SDx channels or combination of channels can be selected, determined by the

contents of the programmable control register. Two interrupt inputs, INT0 and INT1, one

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

an AND of the two interrupt inputs, is provided.

An active LOW reset input allows the PCA9543A 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 VDD pin can be used to limit

the maximum high voltage which will be passed by the PCA9543A. This allows the use of

different bus voltages on each SCx/SDx 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 pins are 5 V tolerant.

2. Features

s 1-of-2 bi-directional translating switches

s I2C-bus interface logic; compatible with SMBus standards

s 2 active LOW interrupt inputs

s Active LOW interrupt output

s Active LOW reset input

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

s Channel selection via I2C-bus, in any combination

s Power-up with all switch channels deselected

s Low Ron switches

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

s No glitch on power-up

s Supports hot insertion

s Low standby current

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

s 5 V tolerant inputs

s 0 kHz to 400 kHz clock frequency

s ESD protection exceeds 2000 V HBM per JESD22-A114, 200 V MM per

JESD22-A115, and 1000 V CDM per JESD22-C101

s Latch-up testing is done to JEDEC Standard JESD78 which exceeds 100 mA

Share Link: