EEWORLDEEWORLDEEWORLD

Part Number

Search

PCA9541D/02,118

Description
PCA9541 - 2-to-1 I2C-bus master selector with interrupt logic and reset SOP 16-Pin
CategoryThe embedded processor and controller    Microcontrollers and processors   
File Size411KB,43 Pages
ManufacturerNXP
Websitehttps://www.nxp.com
Download Datasheet Parametric Compare View All

PCA9541D/02,118 Overview

PCA9541 - 2-to-1 I2C-bus master selector with interrupt logic and reset SOP 16-Pin

PCA9541D/02,118 Parametric

Parameter NameAttribute value
Brand NameNXP Semiconductor
Objectid1815869115
Parts packaging codeSOP
package instructionSOP, SOP16,.25
Contacts16
Manufacturer packaging codeSOT109-1
Reach Compliance Codeunknown
YTEOL0
JESD-30 codeR-PDSO-G16
JESD-609 codee4
length9.9 mm
Number of terminals16
Maximum operating temperature85 °C
Minimum operating temperature-40 °C
Package body materialPLASTIC/EPOXY
encapsulated codeSOP
Encapsulate equivalent codeSOP16,.25
Package shapeRECTANGULAR
Package formSMALL OUTLINE
Certification statusNot Qualified
Maximum seat height1.75 mm
Maximum supply voltage3.6 V
Minimum supply voltage2.3 V
Nominal supply voltage2.5 V
surface mountYES
technologyCMOS
Temperature levelINDUSTRIAL
Terminal surfaceNICKEL PALLADIUM GOLD
Terminal formGULL WING
Terminal pitch1.27 mm
Terminal locationDUAL
width3.9 mm
uPs/uCs/peripheral integrated circuit typeBUS CONTROLLER, I2C
PCA9541
2-to-1 I
2
C-bus master selector with interrupt logic and reset
Rev. 7.1 — 24 June 2015
Product data sheet
1. General description
The PCA9541 is a 2-to-1 I
2
C-bus master selector designed for high reliability dual master
I
2
C-bus applications where system operation is required, even when one master fails or
the controller card is removed for maintenance. The two masters (for example, primary
and back-up) are located on separate I
2
C-buses that connect to the same downstream
I
2
C-bus slave devices. I
2
C-bus commands are sent by either I
2
C-bus master and are used
to select one master at a time. Either master at any time can gain control of the slave
devices if the other master is disabled or removed from the system. The failed master is
isolated from the system and will not affect communication between the on-line master
and the slave devices on the downstream I
2
C-bus.
Two versions are offered for different architectures. PCA9541/01 with channel 0 selected
at start-up and PCA9541/03 with no channel selected after start-up.
The interrupt outputs are used to provide an indication of which master has control of the
bus. One interrupt input (INT_IN) collects downstream information and propagates it to
the 2 upstream I
2
C-buses (INT0 and INT1) if enabled. INT0 and INT1 are also used to let
the previous bus master know that it is not in control of the bus anymore and to indicate
the completion of the bus recovery/initialization sequence. Those interrupts can be
disabled and will not generate an interrupt if the masking option is set.
A bus recovery/initialization if enabled sends nine clock pulses, a not acknowledge, and a
STOP condition in order to set the downstream I
2
C-bus devices to an initialized state
before actually switching the channel to the selected master.
An interrupt is sent to the upstream channel when the recovery/initialization procedure is
completed.
An internal bus sensor senses the downstream I
2
C-bus traffic and generates an interrupt
if a channel switch occurs during a non-idle bus condition. This function is enabled when
the PCA9541 recovery/initialization is not used. The interrupt signal informs the master
that an external I
2
C-bus recovery/initialization needs to be performed. It can be disabled
and an interrupt will not be generated.
The pass gates of the switches are constructed such that the V
DD
pin can be used to limit
the maximum high voltage, which will be passed by the PCA9541. This allows the use of
different bus voltages on each pair, so that 1.8 V, 2.5 V, or 3.3 V devices can communicate
with 5 V devices without any additional protection.
The PCA9541 does not isolate the capacitive loading on either side of the device, so the
designer must take into account all trace and device capacitances on both sides of the
device, and pull-up resistors must be used on all channels.
External pull-up resistors pull the bus to the desired voltage level for each channel. All I/O
pins are 6.0 V tolerant.

PCA9541D/02,118 Related Products

PCA9541D/02,118 PCA9541PW-01118 PCA9541D-02112 PCA9541PW-01112 PCA9541D-01118 PCA9541D-03118 PCA9541BS-02118 PCA9541PW/03,112
Description PCA9541 - 2-to-1 I2C-bus master selector with interrupt logic and reset SOP 16-Pin Interface - Specialized 2:1 I2C DEMUX W/INT+RST-CH Interface - Specialized 2:1 I2C DEMUX W/INT+RS-HOTSWAP Interface - Specialized 2:1 I2C DEMUX Interface - Specialized 2:1 I2C DEMUX Interface - Specialized I2C 2:1 SELECTOR Interface - Specialized 2:1 I2C DEMUX W/INT+RS-HOTSWAP Interface - Dedicated 2:1 I2C DEMUX
Product Attribute - Attribute Value Attribute Value Attribute Value Attribute Value Attribute Value Attribute Value -
Manufacturer - NXP NXP NXP NXP NXP NXP -
Product Category - Interface - Specialized Interface - Specialized Interface - Specialized Interface - Specialized Interface - Specialized Interface - Specialized -
Packaging - Reel Tube Tube Reel Reel Reel -
Factory Pack Quantity - 2500 50 2400 2500 2500 6000 -
Unit Weight - 0.001849 oz 0.005079 oz 0.001849 oz 0.004758 oz 0.005079 oz - -
Weird problem of MSP430 FLASH programming has been solved
[i=s]This post was last edited by yl20084784 on 2016-12-25 02:10[/i] I wrote a small program for msp430F1611, which uses the serial port to send instructions to let 430 erase dozens of KB, and then wr...
yl20084784 Microcontroller MCU
【Video Sharing】A Tour of the WEBENCH Visualizer Design Tool
Hello everyone!! It's time to relax on the weekend again, but don't forget to keep a learning heart~~:loveliness: I continue to recommend WEBENCH, a powerful design tool. Showing you billions of compl...
德州仪器_视频 Analogue and Mixed Signal
EEWORLD University Hall - A Week of Learning Series - Analog Electronics
Mastering Analog Electronics in One Week : https://training.eeworld.com.cn/course/3939...
老白菜 Analog electronics
How to display the receiving address using 12864?
For example, a frame of received data is stored in the array rx[]={0x87,0x81,0x82,0x83,0x84,0x85}. How can I display it using the 12864 LCD? The display effect is: 87 81 82 83, etc. In the past, it wa...
chenxiang1 51mcu
Share the programming example of TI microcontroller MSP430-FLASH information area
[list=1] [*][color=#483d8b]2.void flash_clr(int *ptr) [/color] [*][color=#483d8b]3.{ [/color] [*][color=#483d8b]4. _DINT(); //Disable interrupt[/color] [*][color=#483d8b]5. FCTL3 = 0x0A500; //* Lock =...
Jacktang Microcontroller MCU

EEWorld
subscription
account

EEWorld
service
account

Automotive
development
circle

Robot
development
community

Index Files: 1762  1786  1656  1511  996  36  34  31  21  39 
Datasheet   0 1 2 3 4 5 6 7 8 9 A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
Room 1530, 15th Floor, Building B, No. 18 Zhongguancun Street, Haidian District, Beijing Telephone: (010) 82350740 Postal Code: 100190
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved 京ICP证060456号 京ICP备10001474号-1 电信业务审批[2006]字第258号函 京公网安备 11010802033920号