Overview
The PCA9519PW,112 is a 4-channel level translating I²C-bus/SMBus repeater manufactured by NXP USA Inc. This device is designed to enable communication between a processor's low-voltage 2-wire serial bus and standard I²C-bus or SMBus I/O devices. It provides bidirectional buffering for both the data (SDA) and clock (SCL) lines, allowing for the extension of the I²C-bus while maintaining all operating modes and features of the I²C-bus system during level shifts.
Key Specifications
| Parameter | Value |
|---|---|
| Number of Channels | 4 (4 SCL/SDA pairs) |
| Voltage Range (Port A) | 1.0 V to VCC(B) - 1.5 V |
| Voltage Range (Port B) | 3.0 V to 5.5 V |
| Maximum Capacitance (Port B) | 400 pF |
| Enable Pin | Active HIGH repeater enable input |
| Input/Output Type | Open-drain inputs/outputs |
| Glitch Filter | 50 ns on B-side input |
| I²C-Bus Compatibility | Supports Standard-mode and Fast-mode I²C-bus devices and multiple masters |
| Power-Off State | High-impedance I²C-bus pins when unpowered |
Key Features
- Bidirectional buffering for both SDA and SCL lines, isolating capacitance and allowing up to 400 pF on the higher voltage side.
- Voltage level translation from port A (1 V to VCC(B) - 1.5 V) to port B (3.0 V to 5.5 V).
- No external pull-up resistors required on the lower voltage port A.
- Active HIGH repeater enable input.
- Lock-up free operation with current sensing mechanism to detect input or output LOW signals.
- Supports arbitration and clock stretching across the repeater.
- 5 V tolerant B-side SCL, SDA, and enable pins.
Applications
The PCA9519PW,112 is suitable for various applications where level translation and bus extension are necessary, such as in industrial control systems, automotive electronics, consumer electronics, and medical devices. It is particularly useful in scenarios where different voltage levels need to be bridged between different parts of a system while maintaining I²C-bus compatibility.
Q & A
- What is the primary function of the PCA9519PW,112?
The PCA9519PW,112 is a 4-channel level translating I²C-bus/SMBus repeater that enables communication between a processor's low-voltage 2-wire serial bus and standard I²C-bus or SMBus I/O devices. - How many channels does the PCA9519PW,112 have?
The device has 4 channels, each consisting of an SCL/SDA pair. - What is the voltage range for Port A and Port B?
Port A operates from 1.0 V to VCC(B) - 1.5 V, while Port B operates from 3.0 V to 5.5 V. - What is the maximum capacitance supported on Port B?
The maximum capacitance supported on Port B is 400 pF. - Does the PCA9519PW,112 require external pull-up resistors on Port A?
No, external pull-up resistors are not required on Port A. - What is the function of the enable pin?
The enable pin is an active HIGH repeater enable input that controls the state of the drivers. - Is the PCA9519PW,112 compatible with Standard-mode and Fast-mode I²C-bus devices?
Yes, it supports both Standard-mode and Fast-mode I²C-bus devices and multiple masters. - What happens to the I²C-bus pins when the device is unpowered?
The I²C-bus pins are in a high-impedance state when the device is unpowered. - Does the PCA9519PW,112 support arbitration and clock stretching?
Yes, it supports arbitration and clock stretching across the repeater. - Are the B-side SCL, SDA, and enable pins 5 V tolerant?
Yes, the B-side SCL, SDA, and enable pins are 5 V tolerant.
