PCA9546A_3 Datasheet, PDF (1/29 Pages) Texas Instruments – 4-CHANNEL I2C AND SMBus SWITCH WITH RESET FUNCTION

www.ti.com
PCA9546A
4-CHANNEL I²C AND SMBus SWITCH
WITH RESET FUNCTION
SCPS148E – OCTOBER 2005 – REVISED JANUARY 2008
FEATURES
1
• 1-of-4 Bidirectional Translating Switches
• I²C Bus and SMBus Compatible
• Active-Low Reset Input
• 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 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
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)
DESCRIPTION/ORDERING INFORMATION
The PCA9546A is a quad bidirectional translating switch controlled via the I²C bus. The SCL/SDA upstream pair
fans out to four downstream pairs, or channels. Any individual SCn/SDn channel or combination of channels can
be selected, determined by the contents of the programmable control register.
An active-low reset (RESET) input allows the PCA9546A to recover from a situation in which one of the
downstream I²C buses is stuck in a low state. Pulling RESET low resets the I²C state machine and causes all the
channels to be deselected, as does the internal power-on reset function.
T_A
–40°C to 85°C
ORDERING INFORMATION
PACKAGE ^{(1) (2)}
ORDERABLE PART NUMBER
TOP-SIDE MARKING
QFN – RGV
Reel of 2500
PCA9546ARGVR
PD546A
QFN – RGY
Reel of 1000
PCA9546ARGYR
PD546A
Tube of 40
PCA9546AD
PCA9546ADG4
SOIC – D
Reel of 2500
PCA9546ADR
PCA9546ADRG4
PCA9546A
Reel of 250
PCA9546ADT
PCA9546ADTG4
SOIC – DW
Tube of 40
Reel of 2000
PCA9546ADW
PCA9546ADWR
PCA9546A
Reel of 250
PCA9546ADWT
PREVIEW
Tube of 90
PCA9546APW
PCA9546APWE4
TSSOP – PW
Reel of 2000
PCA9546APWR
PCA9546APWRE4
PD546A
Reel of 250
PCA9546APWT
PCA9546APWTE4
TVSOP – DGV
Reel of 2000
Reel of 250
PCA9546ADGVR
PCA9546ADGVT
PD546A
PREVIEW
(1) For the most current package and ordering information, see the Package Option Addendum at the end of this document, or see the TI
website at www.ti.com.
(2) Package drawings, thermal data, and symbolization are available at www.ti.com/packaging.
1
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.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2005–2008, Texas Instruments Incorporated