Overview
The PCA9548AD,112 is an advanced 8-channel I2C-bus switch produced by NXP USA Inc. This component is designed to manage multiple I2C devices on a single bus, resolving potential address conflicts and enabling the connection of multiple identical devices. The PCA9548AD,112 is part of the PCA9548A family, known for its robust features and versatility in various applications.
Key Specifications
| Specification | Value |
|---|---|
| Manufacturer | NXP USA Inc. |
| Package | 24-SOIC |
| Description | 8-channel I2C/SMBus switch with reset |
| Interface Type | I2C, SMBus |
| Number of Channels | 8 |
| Maximum Clock Frequency | 400 kHz |
| Operating Power-Supply Voltage Range | 2.3 V to 5.5 V |
| Input Voltage Tolerance | Up to 6 V |
| ESD Protection | Exceeds 2000 V HBM, 1000 V CDM |
| Reset Input | Active-Low Reset |
| Hardware Address Pins | Three pins for up to eight devices on the I2C bus |
| Operating Temperature Range | -40°C to +85°C |
Key Features
- 1-of-8 bidirectional translating switches, allowing for the connection of multiple I2C devices on a single bus.
- I2C bus and SMBus compatible, supporting clock frequencies from 0 Hz to 400 kHz.
- Active-Low reset input for recovering from stuck I2C bus conditions.
- Three hardware address pins, enabling the use of up to eight PCA9548A devices on the same I2C bus.
- Voltage-level translation between 1.8-V, 2.5-V, 3.3-V, and 5-V buses.
- Low RON switches and low standby current.
- Supports hot insertion and has ESD protection exceeding JESD22 standards.
- Latch-up performance exceeds 100 mA per JESD 78, Class II.
Applications
- Servers and data centers to manage multiple I2C devices efficiently.
- Telecom switching equipment and routers to resolve address conflicts.
- Factory automation systems where multiple sensors or actuators need to be connected.
- Products with I2C slave address conflicts, such as multiple identical temperature sensors.
Q & A
- What is the primary function of the PCA9548AD,112?
The PCA9548AD,112 is an 8-channel I2C-bus switch designed to manage multiple I2C devices on a single bus, resolving potential address conflicts.
- What is the operating voltage range of the PCA9548AD,112?
The operating power-supply voltage range is from 2.3 V to 5.5 V.
- How many hardware address pins does the PCA9548AD,112 have?
The device has three hardware address pins, allowing up to eight devices on the same I2C bus.
- What is the maximum clock frequency supported by the PCA9548AD,112?
The maximum clock frequency is 400 kHz.
- Does the PCA9548AD,112 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 is the purpose of the active-Low reset input on the PCA9548AD,112?
The active-Low reset input allows the device to recover from situations where one of the downstream I2C buses is stuck in a low state.
- What kind of ESD protection does the PCA9548AD,112 have?
The device has ESD protection exceeding 2000 V HBM and 1000 V CDM.
- Can the PCA9548AD,112 be used in hot insertion scenarios?
Yes, the device supports hot insertion.
- What is the operating temperature range of the PCA9548AD,112?
The operating temperature range is from -40°C to +85°C.
- What are some common applications of the PCA9548AD,112?
Common applications include servers, telecom switching equipment, factory automation, and products with I2C slave address conflicts.
