PCA9543A
TWO-CHANNEL I2C-BUS SWITCH
WITH INTERRUPT LOGIC AND RESET
www.ti.com
SCPS169–SEPTEMBER 2007
1
FEATURES
•
1-of-2 Bidirectional Translating Switches
I2C Bus and SMBus Compatible
Two Active-Low Interrupt Inputs
Active-Low Interrupt Output
•
•
•
Supports Hot Insertion
Low Standby Current
•
•
•
•
•
Operating Power-Supply Voltage Range of
2.3 V to 5.5 V
•
•
•
5-V Tolerant Inputs
Active-Low Reset Input
0 to 400-kHz Clock Frequency
Two Address Pins Allowing up to Four
Devices on the I2C Bus
Channel Selection Via I2C Bus, in Any
Combination
Latch-Up Performance Exceeds 100 mA Per
JESD78
•
•
•
ESD Protection Exceeds JESD 22
Power Up With All Switch Channels
Deselected
–
–
–
2000-V Human-Body Model (A114-A)
200-V Machine Model (A115-A)
•
•
Low ron Switches
1000-V Charged-Device Model (C101)
Allows Voltage-Level Translation Between
1.8-V, 2.5-V, 3.3-V, and 5-V Buses
•
No Glitch on Power Up
D PACKAGE
(TOP VIEW)
PW PACKAGE
(TOP VIEW)
VCC
1
2
3
4
5
6
7
14
13
12
11
10
9
A0
A1
VCC
1
2
3
4
5
6
7
14
13
12
11
10
9
A0
A1
SDA
SCL
INT
SDA
SCL
INT
RESET
INT0
SD0
RESET
INT0
SD0
SC1
SD1
INT1
SC1
SD1
INT1
SC0
SC0
GND
8
GND
8
DESCRIPTION/ORDERING INFORMATION
The PCA9543A is a bidirectional translating switch controlled by the I2C bus. The SCL/SDA upstream pair fans
out to two 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. Two interrupt inputs (INT0–INT1),
one for each of the downstream pairs, are provided. One interrupt output (INT) acts as an AND of the two
interrupt inputs.
ORDERING INFORMATION
TA
PACKAGE(1)(2)
ORDERABLE PART NUMBER
PCA9543AD
TOP-SIDE MARKING
PCA9543A
Tube of 50
SOIC – D
Reel of 2500
Tube of 90
PCA9543ADR
PCA9543APW
PCA9543APWR
–40°C to 85°C
TSSOP – PW
PD543A
Reel of 2000
(1) For the most current package and ordering information, see the Package Option Addendum at the end of this document, or see the TI
web site 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.
Copyright © 2007, 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.