Overview
The PCA9545ABS,118 is a specialized interface IC produced by NXP USA Inc. This component is a quad bidirectional translating switch controlled via the I²C-bus, designed to facilitate communication between multiple devices on the same bus. It features four downstream pairs or channels, allowing for flexible and efficient management of I²C-bus traffic. The device is particularly useful in systems where multiple I²C devices need to be connected to a single I²C-bus, and it supports voltage level translation between different bus voltages such as 1.8 V, 2.5 V, 3.3 V, and 5 V.
Key Specifications
| Parameter | Description | Value |
|---|---|---|
| Manufacturer | NXP USA Inc. | - |
| Part Number | PCA9545ABS,118 | - |
| Package | 20-VQFN Exposed Pad | - |
| Supply Voltage | Operating power supply voltage range | 2.3 V to 5.5 V |
| Pin Count | Total number of pins | 20 |
| Interface | Type of interface | I²C-bus, SMBus compatible |
| Interrupt Inputs | Number of active LOW interrupt inputs | 4 |
| Interrupt Output | Type of interrupt output | Active LOW |
| Reset Input | Type of reset input | Active LOW |
| Terminal Pitch | Center distance between pins | 0.65 mm |
| Dimensions | Length, Width, Height | 5 mm x 5 mm x 1 mm |
| RoHS Status | Compliance with RoHS directive | ROHS3 Compliant |
| ESD Protection | Electrostatic discharge protection | Exceeds 2000 V HBM, 1000 V CDM |
Key Features
- Quad bidirectional translating switch controlled via the I²C-bus, allowing the SCL/SDA upstream pair to fan out to four downstream pairs or channels.
- Supports voltage level translation between 1.8 V, 2.5 V, 3.3 V, and 5 V buses without additional protection.
- Four active LOW interrupt inputs and one active LOW interrupt output.
- Active LOW reset input to recover from stuck I²C-bus states.
- Two address pins allowing up to four devices on the I²C-bus, with alternate address versions for up to 12 devices in larger systems.
- Low RON switches, no glitch on power-up, and support for hot insertion.
- 5 V tolerant inputs and operating clock frequency range of 0 Hz to 400 kHz.
- Low standby current and ESD protection exceeding 2000 V HBM and 1000 V CDM.
Applications
- Multi-device I²C-bus systems: Ideal for systems where multiple I²C devices need to be connected to a single I²C-bus.
- Voltage translation: Useful in mixed-voltage systems where devices with different supply voltages need to communicate.
- Industrial automation: For controlling and monitoring multiple devices in industrial settings.
- Consumer electronics: In devices such as smartphones, tablets, and other consumer electronics that use I²C-bus for communication.
- Automotive systems: For managing multiple I²C devices in automotive applications.
Q & A
- What is the PCA9545ABS,118 used for?
The PCA9545ABS,118 is a quad bidirectional translating switch used to manage multiple I²C devices on a single I²C-bus, allowing for voltage level translation and interrupt handling.
- What is the operating voltage range of the PCA9545ABS,118?
The operating power supply voltage range is from 2.3 V to 5.5 V.
- How many interrupt inputs does the PCA9545ABS,118 have?
The device has four active LOW interrupt inputs.
- What is the package type of the PCA9545ABS,118?
The package type is 20-VQFN Exposed Pad.
- Is the PCA9545ABS,118 RoHS compliant?
Yes, the PCA9545ABS,118 is ROHS3 compliant.
- What is the maximum clock frequency supported by the PCA9545ABS,118?
The device supports clock frequencies up to 400 kHz.
- Does the PCA9545ABS,118 support hot insertion?
Yes, the device supports hot insertion.
- How many devices can be connected to the I²C-bus using the PCA9545ABS,118?
Up to four devices can be connected to the I²C-bus, with alternate address versions allowing up to 12 devices in larger systems.
- What kind of ESD protection does the PCA9545ABS,118 offer?
The device offers ESD protection exceeding 2000 V HBM and 1000 V CDM.
- What is the purpose of the reset input on the PCA9545ABS,118?
The active LOW reset input allows the device to recover from stuck I²C-bus states by resetting the I²C-bus state machine and deselecting all channels.
