900,000+ datasheet pdf search and download

Datasheet4U offers most rated semiconductors data sheet pdf






etcTI

TCA9544A Datasheet Preview

TCA9544A Datasheet

Low Voltage 4-Channel I2C and SMBus Multiplexer

No Preview Available !

Product
Folder
Order
Now
Technical
Documents
Tools &
Software
Support &
Community
TCA9544A
SCPS209C – MAY 2014 – REVISED NOVEMBER 2019
TCA9544A Low Voltage 4-Channel I2C and SMBus Multiplexer With Interrupt Logic
1 Features
1 1-of-4 Bidirectional Translating Switches
• I2C Bus and SMBus Compatible
• Four Active-Low Interrupt Inputs
• Active-Low Interrupt Output
• Three Address Pins, Allowing up to Eight
TCA9544A Devices on the I2C Bus
• Channel Selection Via I2C Bus
• Power-Up With All Switch Channels Deselected
• Low RON 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)
2 Applications
• Servers
• Routers (Telecom Switching Equipment)
Factory Automation
• Products With I2C Slave Address Conflicts (For
Example, Multiple, Identical Temp Sensors)
3 Description
The TCA9544A is a 4-channel, bidirectional
translating I2C Muliplexer. The master SCL/SDA
signal pair is directed to one of the four channels of
slave devices, SC0/SD0-SC3/SD3. Four interrupt
inputs (INT3–INT0), one for each of the downstream
pairs, are provided. One interrupt output (INT) acts as
an AND of the four interrupt inputs.
A power-on reset function returns the registers to
their default state and initializes the I2C state
machine, with all channels deselected.
The pass gates of the switches are constructed such
that the VCC pin can be used to limit the maximum
high voltage which will be passed by the TCA9544A.
This allows the use of different bus voltages on each
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 5.5 V tolerant.
Device Information(1)
PART NUMBER
PACKAGE
BODY SIZE (NOM)
TCA9544A
TSSOP (20)
6.50 mm × 4.40 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Simplified Schematic
I2C or SMBus
Master
(e.g. Processor)
SDA
SCL
INT
VCC
Channel 0
SD0
SC0
INT0
SD1 Channel 1
SC1
INT1
Slaves A0, A1...AN
Slaves B0, B1...BN
A0
A1
A2
GND
TCA9544A
SD2 Channel 2
SC2
INT1
SD3 Channel 3
SC3
INT3
Slaves C0, C1...CN
Slaves D0, D1...DN
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.




etcTI

TCA9544A Datasheet Preview

TCA9544A Datasheet

Low Voltage 4-Channel I2C and SMBus Multiplexer

No Preview Available !

TCA9544A
SCPS209C – MAY 2014 – REVISED NOVEMBER 2019
www.ti.com
Table of Contents
1 Features .................................................................. 1
2 Applications ........................................................... 1
3 Description ............................................................. 1
4 Revision History..................................................... 2
5 Pin Configuration and Functions ......................... 3
6 Specifications......................................................... 4
6.1 Absolute Maximum Ratings ...................................... 4
6.2 ESD Ratings.............................................................. 4
6.3 Recommended Operating Conditions ...................... 4
6.4 Thermal Information .................................................. 4
6.5 Electrical Characteristics........................................... 5
6.6 I2C Interface Timing Requirements........................... 6
6.7 Switching Characteristics .......................................... 6
6.8 Interrupt Timing Requirements ................................. 7
6.9 Typical Characteristics .............................................. 7
7 Parameter Measurement Information .................. 8
8 Detailed Description ............................................ 10
8.1 Overview ................................................................. 10
8.2 Functional Block Diagram ....................................... 10
8.3 Feature Description................................................. 11
8.4 Device Functional Modes........................................ 11
8.5 Programming .......................................................... 11
8.6 Control Register ...................................................... 13
9 Application and Implementation ........................ 16
9.1 Application Information............................................ 16
9.2 Typical Application .................................................. 16
10 Power Supply Recommendations ..................... 19
10.1 Power-On Reset Requirements ........................... 19
11 Layout................................................................... 21
11.1 Layout Guidelines ................................................. 21
11.2 Layout Example .................................................... 21
12 Device and Documentation Support ................. 22
12.1 Receiving Notification of Documentation Updates 22
12.2 Support Resources ............................................... 22
12.3 Trademarks ........................................................... 22
12.4 Electrostatic Discharge Caution ............................ 22
12.5 Glossary ................................................................ 22
13 Mechanical, Packaging, and Orderable
Information ........................................................... 22
4 Revision History
Changes from Revision B (May 2018) to Revision C
Page
• Changed VCC = 1.65 V to 5.5 V To: VCC = 2.5 V in Figure 15 ............................................................................................. 16
Changes from Revision A (May 2014) to Revision B
Page
• Changed the first paragraph of the Description...................................................................................................................... 1
• Added Tstg to the Absolute Maximum Ratings table ............................................................................................................... 4
• Changed the first paragraph of the Overview section .......................................................................................................... 10
• Changed "switch" to "multiplexer" in the Feature Description section.................................................................................. 11
• Changed text in the Control Register Definition section From: "One or several SCn/SDn downstream pairs, or
channels, are selected..." To: "One SCn/SDn downstream pair, or channel, is selected..."................................................ 14
Changes from Original (May 2014) to Revision A
Page
• Updated document from PREVIEW to PRODUCTION DATA. ............................................................................................. 1
2
Submit Documentation Feedback
Product Folder Links: TCA9544A
Copyright © 2014–2019, Texas Instruments Incorporated


Part Number TCA9544A
Description Low Voltage 4-Channel I2C and SMBus Multiplexer
Maker etcTI
PDF Download

TCA9544A Datasheet PDF






Similar Datasheet

1 TCA9544A Low Voltage 4-Channel I2C and SMBus Multiplexer
etcTI





Part Number Start With

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



Site map

Webmaste! click here

Contact us

Buy Components

Privacy Policy