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TCA9546A Low Voltage 4-Channel I2C and SMBus Switch with Reset Function
SCPS205B
April 2014 – November 2019
TCA9546A
PRODUCTION DATA.
CONTENTS
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TCA9546A Low Voltage 4-Channel I2C and SMBus Switch with Reset Function
1
Features
2
Applications
3
Description
Device Images
Simplified Application Diagram
4
Revision History
5
Pin Configuration and Functions
Pin Functions
6
Specifications
6.1
Absolute Maximum Ratings
6.2
ESD Ratings
6.3
Recommended Operating Conditions
6.4
Thermal Information
6.5
Electrical Characteristics
6.6
I2C Interface Timing Requirements
6.7
Switching Characteristics
6.8
Interrupt and Reset Timing Requirements
6.9
Typical Characteristics
7
Parameter Measurement Information
8
Detailed Description
8.1
Overview
8.2
Functional Block Diagram
8.3
Feature Description
8.4
Device Functional Modes
8.4.1
RESET Input
8.4.2
Power-On Reset
8.5
Programming
8.5.1
I2C Interface
8.6
Control Register
8.6.1
Device Address
8.6.2
Control Register Description
8.6.3
Control Register Definition
9
Application and Implementation
9.1
Application Information
9.2
Typical Application
9.2.1
Design Requirements
9.2.2
Detailed Design Procedure
9.2.3
TCA9546A Application Curves
10
Power Supply Recommendations
10.1
Power-On Reset Requirements
11
Layout
11.1
Layout Guidelines
11.2
Layout Example
12
Device and Documentation Support
12.1
Receiving Notification of Documentation Updates
12.2
Support Resources
12.3
Trademarks
12.4
Electrostatic Discharge Caution
12.5
Glossary
13
Mechanical, Packaging, and Orderable Information
IMPORTANT NOTICE
Package Options
Mechanical Data (Package|Pins)
PW|16
MPDS361A
D|16
MPDS178G
Thermal pad, mechanical data (Package|Pins)
Orderable Information
scps205b_oa
scps205b_pm
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DATA SHEET
TCA9546A Low Voltage 4-Channel I2C and SMBus Switch with Reset Function
1
Features
1-of-4 Bidirectional translating switches
I
2
C Bus and SMBus compatible
Active-low reset input
Three address pins, allowing up to eight TCA9546A devices on the I
2
C bus
Channel selection via I
2
C Bus, in any combination
Power-up with all switch channels deselected
Low R
ON
switches
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
Low standby current
Operating power-supply voltage range of 1.65 V to 5.5 V
5.5 V Tolerant inputs
0 to 400-kHz Clock frequency
Latch-up performance exceeds 100 mA Per JESD 78
ESD Protection exceeds JESD 22
4000-V Human-body model (A114-A)
1500-V Charged-device model (C101)