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Updated at 01/11/2025 10:30:15(UTC+8)

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Description

The PCA9548APW is a 8-channel I²C-bus Switch with reset. The PCA9548A is an octal bidirectional translating switch controlled via the I²C-bus. The SCL/SDA upstream pair fans out to eight downstream pairs or channels. Any individual SCx/SDx channel or combination of channels can be selected, determined by the contents of the programmable control register. An active low reset input allows the PCA9548A to recover from a situation where one of the downstream I²C-buses is stuck in a low state. Pulling the RESET pin low resets the I²C-bus state machine and causes all the channels to be deselected as does the internal Power-on reset function. The pass gates of the switches are constructed such that the VDD pin can be used to limit the maximum high voltage which will be passed by the PCA9548A.
1-of-8 Bidirectional translating multiplexer
I²C-bus Interface logic, compatible with SMBus standards
Active low reset input
3 Address pins allowing up to 8 devices on I²C-bus
Channel selection via I²C-bus, one channel at a time
Power-up with all channels deselected except channel 0 which is connected
Low Ron multiplexers
Allows voltage level translation between 1.8, 2.5, 3.3 and 5V buses
No glitch on power-up
Supports hot insertion
Low standby current
6V Tolerant inputs
0Hz to 400kHz Clock frequency
Latch-up testing is done to JEDEC standard JESD78 that exceeds 100mA
ESD sensitive device, take proper precaution while handling the device.

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PCA9548APW Specifications

Attribute	Attribute Value

Datasheet	Datasheet
3D Model	3D Model
Mounting Style	Surface Mount
Number of Pins	24 Pin
Case/Package	TSSOP
Number of Outputs	1 Output
Contacts Type	DPST-NC
Supply Current	30.0 µA
Number of Circuits	1 Circuit
Number of Positions	24 Position
Number of Bits	8 Bit
Power Dissipation	0.4 W
Number of Inputs	8 Input
Operating Temperature (Max)	85 ℃
Operating Temperature (Min)	-40 ℃
Supply Voltage	2.3V ~ 5.5V
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Operating Temperature	-40℃ ~ 85℃
Product Lifecycle Status	Unknown
Packaging	Each
RoHS	RoHS Compliant
Lead-Free Status	Lead Free
REACH SVHC Compliance	No SVHC
REACH SVHC Compliance Edition	2015/12/17
ECCN Code	EAR99

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