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PCA9544ADW Datasheet(PDF) 1 Page - Texas Instruments

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Part # PCA9544ADW
Description  4-CHANNEL IC AND SMBus MULTIPLEXER WITH INTERRUPT LOGIC
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Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

PCA9544ADW Datasheet(HTML) 1 Page - Texas Instruments

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FEATURES
DESCRIPTION/ORDERING INFORMATION
PCA9544A
4-CHANNEL I2C AND SMBus MULTIPLEXER
WITH INTERRUPT LOGIC
SCPS146A – OCTOBER 2005 – REVISED OCTOBER 2005
1-of-4 Bidirectional Translating Switches
No Glitch on Power Up
I2C Bus and SMBus Compatible
Supports Hot Insertion
Four Active-Low Interrupt Inputs
Low Standby Current
Active-Low Interrupt Output
Operating Power-Supply Voltage Range of
2.3 V to 5.5 V
Three Address Pins, Allowing up to Eight
Devices on the I2C Bus
5.5-V Tolerant Inputs
Channel Selection Via I2C Bus
0 to 400-kHz Clock Frequency
Power Up With All Switch Channels
Latch-Up Performance Exceeds 100 mA Per
Deselected
JESD 78
Low R
ON Switches
ESD Protection Exceeds JESD 22
Allows Voltage-Level Translation Between
– 2000-V Human-Body Model (A114-A)
1.8-V, 2.5-V, 3.3-V, and 5-V Buses
– 200-V Machine Model (A115-A)
– 1000-V Charged-Device Model (C101)
The PCA9544A is a quad bidirectional translating switch 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
pullup resistors pull the bus up to the desired voltage level for each channel. All I/O pins are 5-V tolerant.
ORDERING INFORMATION
TA
PACKAGE(1)
ORDERABLE PART NUMBER
TOP-SIDE MARKING
QFN – RGW
Reel of 3000
PCA9544ARGWR
PREVIEW
QFN – RGY
Reel of 1000
PCA9544ARGYR
PD544A
Tube of 25
PCA9544ADW
PCA9544A
SOIC – DW
Reel of 2000
PCA9544ADWR
Reel of 250
PCA9544ADWT
PREVIEW
Tube of 70
PCA9544APW
–40
°C to 85°C
TSSOP – PW
Reel of 2000
PCA9544APWR
PD544A
Reel of 250
PCA9544APWT
Reel of 2000
PCA9544ADGVR
PD544A
TVSOP – DGV
Reel of 250
PCA9544ADGVT
PREVIEW
VFBGA – GQN
Reel of 1000
PCA9544AGQNR
PD544A
VFBGA – ZQN (Pb-free)
Reel of 1000
PCA9544AZQNR
PD544A
(1)
Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are available at
www.ti.com/sc/package.
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date.
Copyright © 2005, Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.


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