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PCA9541

Features: 2-to-1 bi-directional master selectorI 2C interface logic; compatible with SMBus standardsPCA9541/01 powers-up with Channel 0 selectedPCA9541/02 powers-up with Channel 0 selected after STOPcondition detected (bus idle) on Channel 0PCA9541/03 powers-up with no channel selected and eitherm...

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SeekIC No. : 004456297 Detail

PCA9541: Features: 2-to-1 bi-directional master selectorI 2C interface logic; compatible with SMBus standardsPCA9541/01 powers-up with Channel 0 selectedPCA9541/02 powers-up with Channel 0 selected after STO...

PCA9541 Data Sheet

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Part Number:
PCA9541
Supply Ability:
5000

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  • 1~5000
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  • Processing time
  • 15 Days
Total Cost: $ 0.00

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Upload time: 2024/11/25

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Product Details

Description



Features:

2-to-1 bi-directional master selector
I 2C interface logic; compatible with SMBus standards
PCA9541/01 powers-up with Channel 0 selected
PCA9541/02 powers-up with Channel 0 selected after STOP
condition detected (bus idle) on Channel 0
PCA9541/03 powers-up with no channel selected and either
master can take control of the bus
Active LOW Interrupt Input
2 Active LOW Interrupt Outputs
Active LOW Reset Input
4 address pins allowing up to 16 devices on the I2 C-bus
Channel selection via I2 C-bus
Bus initialization/recovery function
Bus traffic sensor
Low Rds ONswitches
Allows voltage level translation between 1.8 V, 2.5 V, 3.3 V and 5 V buses
No glitch on power-up
Supports hot insertion
Software identical for both masters
Low stand-by current
Operating power supply voltage range of 2.3 V to 5.5 V
6.0 V tolerant Inputs
0 to 400 kHz clock frequency
ESD protection exceeds 2000 V HBM per JESD22-A114,
200 V MM per JESD22-A115 and 1000 V CDM per JESD22-C101
Latch-up testing is done to JESDEC Standard JESD78 which exceeds 100 mA
Packages offered: SO16, TSSOP16, HVQFN16


Pinout

Connection Diagram


Specifications

symbol partameter conditions RATING unit
VDD DC supply voltage   -0.5to +7.0   V
VI DC input voltage    -0.5 to+7.0  V
Ii DC input current   ±20  MA
IO DC output current   ±25  MA
I DC DC Supply current   ±100  MA
ISS DC Supply current   ±100  MA
Ptot total power dissipation   400  MW
Tstg Storage temperature range   60 to+150  °C
Tamb Operating ambient temperature   0to70  °C



Description

     The PCA9541 is a 2-to-1 I2 C master selector designed for high reliability dual master I2C applications where system operation is required, even when one master fails or the controller card is removed for maintenance. The two masters of PCA9541 (e.g., primary and back-up) are located on separate I2 C-buses that connect to thesame downstream I2C bus slave devices. I2 C commands are sent either I2C-bus master and are used to select one master at a time. Either master at any time can gain control of the slave devices of PCA9541 if the other master of PCA9541 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 I2C-bus.




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