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SMBus Multiplexer. PCA9544A Datasheet

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SMBus Multiplexer. PCA9544A Datasheet






PCA9544A Multiplexer. Datasheet pdf. Equivalent




PCA9544A Multiplexer. Datasheet pdf. Equivalent





Part

PCA9544A

Description

Low Voltage 4-Channel I2C and SMBus Multiplexer



Feature


Product Folder Order Now Technical Doc uments Tools & Software Support & Com munity PCA9544A SCPS146F – OCTOBER 2 005 – REVISED AUGUST 2019 PCA9544A Lo w Voltage 4-Channel I2C and SMBus Multi plexer With Interrupt Logic 1 Features •1 1-of-4 Bidirectional translating switches • I2C Bus and SMBus compatib le • Four active-low interrupt inputs • Active-low interrupt outp.
Manufacture

Texas Instruments

Datasheet
Download PCA9544A Datasheet


Texas Instruments PCA9544A

PCA9544A; ut • Three address pins, allowing up t o eight devices on the I2C Bus • Chan nel selection via I2C Bus • Power up with all switch channels deselected • Low RON switches • Allows voltage-le vel translation between 1.8-V, 2.5-V, 3 .3-V, and 5-V Buses • No glitch on po wer up • Supports hot insertion • L ow standby current • Operating power- supply voltage range of 2.3 V to 5.5.


Texas Instruments PCA9544A

V • 5.5-V Tolerant inputs • 0 to 40 0-kHz Clock frequency • Latch-up perf ormance exceeds 100 mA Per JESD 78 • ESD Protection exceeds JESD 22 – 2000 -V Human-body model (A114-A) – 200-V Machine model (A115-A) – 1000-V Charg ed-device model (C101) 2 Applications Servers • Routers (Telecom Switchi ng Equipment) • Factory Automation Products With I2C Slave Address Confli.


Texas Instruments PCA9544A

cts (For Example, Multiple, Identical Te mp Sensors) 3 Description The PCA9544A is a 4-channel, bidirectional translat ing multiplexer controlled via the I2C bus. The SCL/SDA upstream pair fans out to four downstream pairs, or channels. One SCL/SDA pair can be selected at a time, and this is determined by the con tents of the programmable control regis ter. Four interrup.

Part

PCA9544A

Description

Low Voltage 4-Channel I2C and SMBus Multiplexer



Feature


Product Folder Order Now Technical Doc uments Tools & Software Support & Com munity PCA9544A SCPS146F – OCTOBER 2 005 – REVISED AUGUST 2019 PCA9544A Lo w Voltage 4-Channel I2C and SMBus Multi plexer With Interrupt Logic 1 Features •1 1-of-4 Bidirectional translating switches • I2C Bus and SMBus compatib le • Four active-low interrupt inputs • Active-low interrupt outp.
Manufacture

Texas Instruments

Datasheet
Download PCA9544A Datasheet




 PCA9544A
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PCA9544A
SCPS146F – OCTOBER 2005 – REVISED AUGUST 2019
PCA9544A 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 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
2.3 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
– 2000-V Human-body model (A114-A)
– 200-V Machine model (A115-A)
– 1000-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 PCA9544A is a 4-channel, bidirectional
translating multiplexer controlled via the I2C bus. The
SCL/SDA upstream pair fans out to four downstream
pairs, or channels. One SCL/SDA pair can be
selected at a time, and this is determined by the
contents of the programmable control register. 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 puts the registers in their
default state and initializes the I2C state machine,
with no channel selected.
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 PCA9544A.
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-V tolerant.
Device Information(1)
PART NUMBER
PACKAGE
BODY SIZE (NOM)
TVSOP (DGV) (20) 5.00 mm x 4.40 mm
PCA9544A
SOIC (DW) (20)
TSSOP (PW) (20)
12.8 mm x 7.50 mm
6.50 mm × 4.40 mm
VQFN (RGY) (20) 4.50 mm x 3.50 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Simplified Application Diagram
I2C or SMBus
Master
(e.g. µProcessor)
SDA
SCL
INT
VCC
PCA9544A
A0
A1
A2
GND
Channel 0
SD0
SC0
INT0
SD1 Channel 1
SC1
INT1
SD2 Channel 2
SC2
INT2
SD3 Channel 3
SC3
INT3
Slaves A0, A1...AN
Slaves B0, B1...BN
Slaves B0, B1...BN
Slaves B0, B1...BN
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.




 PCA9544A
PCA9544A
SCPS146F – OCTOBER 2005 – REVISED AUGUST 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 ................................. 6
7 Parameter Measurement Information .................. 7
8 Detailed Description .............................................. 8
8.1 Overview ................................................................... 8
8.2 Functional Block Diagram ......................................... 9
8.3 Feature Description................................................. 10
8.4 Device Functional Modes........................................ 10
8.5 Programming .......................................................... 10
8.6 Register Map........................................................... 12
9 Application and Implementation ........................ 15
9.1 Application Information............................................ 15
9.2 Typical Application .................................................. 15
10 Power Supply Recommendations ..................... 18
10.1 Power-On Reset Errata......................................... 18
11 Layout................................................................... 18
11.1 Layout Guidelines ................................................. 18
11.2 Layout Example .................................................... 19
12 Device and Documentation Support ................. 20
12.1 Receiving Notification of Documentation Updates 20
12.2 Community Resources.......................................... 20
12.3 Trademarks ........................................................... 20
12.4 Electrostatic Discharge Caution ............................ 20
12.5 Glossary ................................................................ 20
13 Mechanical, Packaging, and Orderable
Information ........................................................... 20
4 Revision History
Changes from Revision E (June 2014) to Revision F
Page
• Changed text From: "The PCA9544A is a quad bidirectional translating switch" To: "The PCA9544A is a 4-channel,
bidirectional translating multiplexer" in the Description .......................................................................................................... 1
• Changed the Device Information table ................................................................................................................................... 1
• Deleted the RGW, GQN, and ZQN packages from the Pin Configuration and Functions section......................................... 3
• Moved Tstg to the Absolute Maximum Ratings ....................................................................................................................... 4
• Changed the Handling Ratings table to ESD Ratings table ................................................................................................... 4
• Added the Thermal Information table ..................................................................................................................................... 4
• Changed the first paragraph of the Overview section ............................................................................................................ 8
• Changed text From: "bidirectional translating switch" To: "bidirectional translating multiplexer" ......................................... 10
• Changed text from: "One or several SCn/SDn downstream pairs or channels, are selected" To: "Only one SCn/SDn
downstream pair, or channel, can be selected" in the Control Register Definition section.................................................. 13
• Deleted sentence: "If multiple switches will be enabled.." from the second paragraph of the Application Information
section .................................................................................................................................................................................. 15
Changes from Revision D (February 2008) to Revision E
Page
• Added Power-On Reset Errata section. .............................................................................................................................. 18
2 Submit Documentation Feedback
Product Folder Links: PCA9544A
Copyright © 2005–2019, Texas Instruments Incorporated




 PCA9544A
www.ti.com
5 Pin Configuration and Functions
DGV, DW, or PW Package
TVSOP, SOIC, TSSOP (20 Pins)
Top View
A0
A1
A2
INT0
SD0
SC0
INT1
SD1
SC1
GND
1
2
3
4
5
6
7
8
9
10
No t to scale
20 VCC
19 SDA
18 SCL
17 INT
16 SC3
15 SD3
14 INT3
13 SC2
12 SD2
11 INT2
PCA9544A
SCPS146F – OCTOBER 2005 – REVISED AUGUST 2019
RGY Package
VQFN (20 Pins)
Top View
A1 2
19 SDA
A2 3
18 SCL
INT0
4
17 INT
SD0
5
Th ermal
16
Pad
SC0 6
15
SC3
SD3
INT1
7
14 INT3
SD1 8
13 SC2
SC1 9
12 SD2
No t to scale
PIN
NO.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
NAME
A0
A1
A2
INT0
SD0
SC0
INT1
SD1
SC1
GND
INT2
SD2
SC2
INT3
SD3
SC3
INT
SCL
SDA
VCC
Pin Functions
FUNCTION
Address input 0. Connect directly to VCC or ground.
Address input 1. Connect directly to VCC or ground.
Address input 2. Connect directly to VCC or ground.
Active-low interrupt input 0. Connect to VDPU0(1) through a pull-up resistor.
Serial data 0. Connect to VDPU0(1) through a pull-up resistor.
Serial clock 0. Connect to VDPU0(1) through a pull-up resistor.
Active-low interrupt input 1. Connect to VDPU1(1) through a pull-up resistor.
Serial data 1. Connect to VDPU1(1) through a pull-up resistor.
Serial clock 1. Connect to VDPU1(1) through a pull-up resistor.
Ground
Active-low interrupt input 2. Connect to VDPU2(1) through a pull-up resistor.
Serial data 2. Connect to VDPU2(1) through a pull-up resistor.
Serial clock 2. Connect to VDPU2(1) through a pull-up resistor.
Active-low interrupt input 3. Connect to VDPU3(1) through a pull-up resistor.
Serial data 3. Connect to VDPU3(1) through a pull-up resistor.
Serial clock 3. Connect to VDPU3(1) through a pull-up resistor.
Active-low interrupt output. Connect to VDPUM(1) through a pull-up resistor.
Serial clock line. Connect to VDPUM(1) through a pull-up resistor.
Serial data line. Connect to VDPUM(1) through a pull-up resistor.
Supply power
(1) VDPUX is the pull-up reference voltage for the associated data line. VDPUM is the master I2C reference voltage while VDPU0-VDPU3 are the
slave channel reference voltages.
Copyright © 2005–2019, Texas Instruments Incorporated
Product Folder Links: PCA9544A
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