I²C device

tca9548a

The tca9548a is an I²C device in the LabWired part catalog. Its catalog type is tca9548a. It connects to the MCU over I²C at the default address 0x70. The catalog gives a supply range of 1.65–5.5 V. It has 24 pins. A device model in the simulation engine, reached through a dedicated dispatch path rather than the peripheral registry.

From the catalog: I²C bus switch. Re-segments the bus so several fixed-address parts (four VCNL4010s, all 0x13) can coexist; downstream devices are declared with a `channel` and bucketed by the bus loader.

Key facts

Category	I²C devices
Catalog type	`tca9548a`
Interface	I²C
Default I²C address	`0x70` (112 decimal)
Supply range	1.65–5.5 V
Pins	24
Datasheet	TI TCA9548A datasheet

What LabWired simulates

What is simulated

Simulated device model

How it was validated

Built from the datasheet. Implemented from the part’s register documentation and exercised by automated tests. Nothing physical was ever placed next to it.

tca9548a pinout

Power: VCC, GND
I²C: SDA, SCL, SD0, SC0, SD1, SC1, SD2, SC2, SD3, SC3, SD4, SC4, SD5, SC5, SD6, SC6, SD7, SC7
Other signals: RST, A0, A1, A2

Pin	Electrical type	Function
`VCC`	Power input	Supply
`GND`	Power input	Supply
`SDA`	Open-drain	I²C data (SDA)
`SCL`	Open-drain	I²C clock (SCL)
`RST`	Input	—
`A0`	Input	—
`A1`	Input	—
`A2`	Input	—
`SD0`	Open-drain	I²C data (SDA)
`SC0`	Open-drain	I²C clock (SCL)
`SD1`	Open-drain	I²C data (SDA)
`SC1`	Open-drain	I²C clock (SCL)
`SD2`	Open-drain	I²C data (SDA)
`SC2`	Open-drain	I²C clock (SCL)
`SD3`	Open-drain	I²C data (SDA)
`SC3`	Open-drain	I²C clock (SCL)
`SD4`	Open-drain	I²C data (SDA)
`SC4`	Open-drain	I²C clock (SCL)
`SD5`	Open-drain	I²C data (SDA)
`SC5`	Open-drain	I²C clock (SCL)
`SD6`	Open-drain	I²C data (SDA)
`SC6`	Open-drain	I²C clock (SCL)
`SD7`	Open-drain	I²C data (SDA)
`SC7`	Open-drain	I²C clock (SCL)

How to simulate the tca9548a in LabWired

Open the Playground at app.labwired.com and place an MCU board.
Add the tca9548a (catalog type tca9548a).
Connect VCC and GND to the supply and ground of the board. Use a supply inside the catalog range of 1.65–5.5 V.
Connect SDA, SD0, SD1, SD2, SD3, SD4, SD5, SD6, SD7, SCL, SC0, SC1, SC2, SC3, SC4, SC5, SC6 and SC7 to the I²C data and clock pins of the board.
Connect RST, A0, A1 and A2 as your circuit needs.
Run the firmware. It finds the part on the I²C bus at 0x70 and reads and writes it as on hardware.

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