Description
The PCA9548ADW is an I2C Bus Switch, a single element with 1-8 bidirectional translating switches. It's designed for voltage-level translation between different bus voltages (1.8-V, 2.5-V, 3.3-V, and 5-V) and allows selection of the desired channel via the I2C bus. This component supports hot insertion, low standby current, and no glitches on power-up.
It's part number is PCA9548ADW from Texas Instruments, packaged in a 24-pin SOIC tube with an operating power-supply voltage range of 2.3V to 5.5V. The device features active-low reset input, three hardware address pins for use of up to eight devices on the I2C bus, and supports clock frequencies up to 400 kHz.
The PCA9548ADW is a versatile component that can be used in various applications where voltage-level translation and channel selection are necessary.
Features
According to the product information, the features of PCA9548ADW are:
- 1-of-8 bidirectional translating switches
- I2C Bus and SMBus compatible
- Active-Low reset input
- Three hardware address pins for up to eight devices on the I2C bus
- Channel selection via I2C bus
- Power-up with all switch channels deselected
- Low RON 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-V tolerant inputs
- 0-kHz to 400-kHz clock frequency
- Latch-Up performance exceeds 100 mA per JESD 78, Class II
- ESD protection exceeds JESD 22, including human-body model (A114-A), machine model (A115-A), and charged-device model (C101).
Package
The package type of PCA9548ADW is a 24-SOIC (0.295", 7.50mm Width).
Pinout
According to the product information, the pin count for the PCA9548ADW is 24 (24-SOIC package). The description indicates that it is an I2C Bus Switch with a specific function: "1-of-8 Bidirectional Translating Switches". This suggests that this component allows you to control and select from up to eight different channels or buses, allowing for voltage-level translation between 1.8-V, 2.5-V, 3.3-V, and 5-V bus systems.
Manufacturer
The manufacturer of the PCA9548ADW is Texas Instruments (TI). TI is a leading semiconductor company that designs, manufactures, tests, and sells analog and embedded processing chips for a wide range of applications, including automotive, industrial, medical, consumer electronics, and more. With over 80 years of history, TI is one of the most well-established and respected companies in the semiconductor industry.
Applications
The PCA9548ADW I2C Bus Switch is a versatile device suitable for various applications that require voltage-level translation, hot insertion, and low power consumption. Some typical application areas include:
- Embedded systems
- Industrial control systems
- Consumer electronics
- Medical devices
- Automotive systems
- Aerospace systems
Equivalent
The equivalent products of PCA9548ADW are:
- PCA95xx series from Texas Instruments (e.g., PCA9548A, PCA9554A)
- PCF8574/PCF8575 from NXP Semiconductors
- 74LV4050/74HC4050 from NXP Semiconductors
These products offer similar I2C bus switch functionality with varying features and pinouts.
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