Overview
The PCA9548ADGVR is a low-voltage, 8-channel I2C and SMBus switch manufactured by Texas Instruments. This device is designed to manage multiple I2C or SMBus slave devices, resolving address conflicts and enabling communication between devices operating at different voltage levels. The PCA9548A series, which includes the PCA9548ADGVR, features bidirectional translating switches that can be controlled via the I2C bus, allowing for flexible and efficient system design.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Operating Power-Supply Voltage Range | 2.3 to 5.5 | V |
| Number of Channels | 8 | |
| Clock Frequency Range | 0 kHz to 400 kHz | |
| RON (On-Resistance) | 20 Ω (typical) | Ω |
| Propagation Delay Time | 0.3 ns (CL = 15 pF), 1 ns (CL = 50 pF) | ns |
| Reset Input | Active-Low | |
| Hardware Address Pins | 3 | |
| Package Type | TVSOP (24 pins) | |
| Body Size | 5.00 mm × 4.40 mm | mm |
| ESD Protection | 2000-V Human-Body Model, 200-V Machine Model, 1000-V Charged-Device Model |
Key Features
- 1-of-8 bidirectional translating switches
- I2C bus and SMBus compatible
- Active-low reset input
- Three hardware address pins for use of up to eight PCA9548A devices on the I2C bus
- Channel selection via I2C bus
- Power-up with all switch channels deselected
- Low RON switches
- 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
- 5-V tolerant inputs
- Latch-up performance exceeds 100 mA per JESD 78, Class II
Applications
- Servers
- Routers (Telecom Switching Equipment)
- Factory Automation
- Products with I2C slave address conflicts (e.g., multiple identical temperature sensors)
Q & A
- What is the PCA9548ADGVR used for?
The PCA9548ADGVR is used to manage multiple I2C or SMBus slave devices, resolving address conflicts and enabling communication between devices operating at different voltage levels. - What is the operating voltage range of the PCA9548ADGVR?
The operating voltage range is from 2.3 V to 5.5 V. - How many channels does the PCA9548ADGVR have?
The PCA9548ADGVR has 8 channels. - What is the clock frequency range of the PCA9548ADGVR?
The clock frequency range is from 0 kHz to 400 kHz. - Does the PCA9548ADGVR support voltage-level translation?
Yes, it supports voltage-level translation between 1.8-V, 2.5-V, 3.3-V, and 5-V buses. - What type of reset input does the PCA9548ADGVR have?
The PCA9548ADGVR has an active-low reset input. - Can the PCA9548ADGVR be used in hot insertion scenarios?
Yes, it supports hot insertion. - What is the typical on-resistance (RON) of the PCA9548ADGVR?
The typical on-resistance (RON) is 20 Ω. - What kind of ESD protection does the PCA9548ADGVR offer?
The PCA9548ADGVR offers ESD protection exceeding 2000-V Human-Body Model, 200-V Machine Model, and 1000-V Charged-Device Model. - In what package type is the PCA9548ADGVR available?
The PCA9548ADGVR is available in a TVSOP (24 pins) package.
