Overview
The LTC4306CGN#PBF, produced by Analog Devices Inc., is a 4-channel, 2-wire bus multiplexer designed to provide capacitive isolation between the upstream bus and downstream buses. This component allows for software-controlled connection of the upstream 2-wire bus to any desired combination of downstream buses. It features programmable timeout circuitry, rise time accelerators, and fault reporting through ALERT inputs. The LTC4306 is available in 24-lead SSOP packages and supports a wide range of supply voltages from 2.2V to 5.5V.
Key Specifications
| Parameter | Conditions | Min | Typ | Max | Units |
|---|---|---|---|---|---|
| VCC Input Supply Range | 2.7 | 5.5 | V | ||
| ICC Input Supply Current (Downstream Connected, SCL Bus Low, SDA Bus High, VCC = 5.5V) | 5.2 | 8 | mA | ||
| ICC ENABLE = 0V Input Supply Current (VENABLE = 0V, VCC = 5.5V) | 1.25 | 2.5 | mA | ||
| VUVLOU UVLO Upper Threshold Voltage | 2.3 | V | |||
| Package Type | 24-lead SSOP |
Key Features
- 4-channel, 2-wire bus multiplexer with capacitive isolation between the upstream bus and downstream buses.
- Software-controlled connection of the upstream 2-wire bus to any desired combination of downstream buses.
- Programmable timeout circuitry to disconnect downstream buses if the bus is stuck low.
- Rise time accelerators to reduce rise time on the 2-wire bus pins.
- FAULT reporting through ALERT1-ALERT4 inputs.
- General Purpose Input/Output (GPIO) pins that can be used as logic inputs, open-drain outputs, or push-pull outputs.
- Support for supply voltages ranging from 2.2V to 5.5V, independent of the LTC4306 supply voltage.
- Nested addressing with three address pins providing 27 distinct addresses.
Applications
The LTC4306CGN#PBF is suitable for various applications requiring bus multiplexing and isolation, such as:
- Industrial automation systems where multiple sensors or actuators need to be connected to a central controller.
- Automotive systems for managing multiple 2-wire bus connections.
- Medical devices requiring isolation between different parts of the system.
- Consumer electronics where multiple peripherals need to be connected via a 2-wire bus.
Q & A
- What is the primary function of the LTC4306CGN#PBF?
The primary function is to act as a 4-channel, 2-wire bus multiplexer with capacitive isolation between the upstream bus and downstream buses. - What is the range of supply voltages supported by the LTC4306CGN#PBF?
The component supports supply voltages ranging from 2.2V to 5.5V. - How does the LTC4306CGN#PBF handle fault reporting?
It uses ALERT1-ALERT4 inputs for fault reporting. - What is the purpose of the rise time accelerators in the LTC4306CGN#PBF?
The rise time accelerators source currents into the 2-wire bus pins to reduce rise time. - How many distinct addresses can be provided by the LTC4306CGN#PBF?
Three address pins provide 27 distinct addresses. - What is the package type of the LTC4306CGN#PBF?
The component is available in 24-lead SSOP packages. - Can the GPIO pins be used for different functions?
Yes, the GPIO pins can be used as logic inputs, open-drain outputs, or push-pull outputs. - How does the programmable timeout circuitry work?
The programmable timeout circuitry disconnects the downstream buses if the bus is stuck low. - What happens when the ENABLE pin is driven low?
Driving the ENABLE pin low disables I2C communication to the LTC4306 and resets the registers to their default state. - What are some common applications of the LTC4306CGN#PBF?
It is used in industrial automation, automotive systems, medical devices, and consumer electronics.
