Overview
The PCA9519PW118, produced by NXP USA Inc., is a 4-channel level translating I2C-bus/SMBus repeater. This component is designed to enable the interface between a low-voltage 2-wire serial bus and a standard I2C-bus or SMBus I/O, facilitating voltage level translation and bidirectional buffering for both data (SDA) and clock (SCL) lines. This repeater is particularly useful in systems where different voltage levels need to be accommodated without degrading system performance.
Key Specifications
| Parameter | Value |
|---|---|
| Number of Channels | 4 |
| Operating Frequency | Up to 400 kHz |
| Voltage Range (Port A) | 1.0 V to VCC(B) - 1.5 V |
| Voltage Range (Port B) | 3.0 V to 5.5 V |
| Input/Output Type | Open-drain |
| Maximum Capacitance (Port B) | 400 pF |
| Package Type | 20-TSSOP |
| Supply Voltage Tolerance (B-side) | 5 V tolerant |
| Glitch Filter on B-side Input | 50 ns |
Key Features
- Voltage level translation between port A (1 V to VCC(B) - 1.5 V) and 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 and support for arbitration and clock stretching across the repeater.
- Powered-off high-impedance I2C-bus pins.
- Over-voltage tolerant SDA and SCL pins on port B up to 5.5 V.
Applications
The PCA9519PW118 is suitable for a variety of applications where voltage level translation and signal buffering are necessary. These include:
- Embedded systems requiring communication between different voltage domains.
- I2C-bus or SMBus systems that need to extend the bus length or capacitance.
- Industrial automation and control systems.
- Consumer electronics with multiple voltage levels.
Q & A
- What is the primary function of the PCA9519PW118?
The PCA9519PW118 is a 4-channel level translating I2C-bus/SMBus repeater that enables voltage level translation and bidirectional buffering between different voltage domains. - What are the voltage ranges 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. - Does the PCA9519PW118 require external pull-up resistors on Port A?
No, external pull-up resistors are not required on Port A. - What is the maximum capacitance supported on Port B?
The maximum capacitance supported on Port B is 400 pF. - Is the PCA9519PW118 tolerant to over-voltages on Port B?
- What is the package type of the PCA9519PW118?
The PCA9519PW118 comes in a 20-TSSOP package.- Does the PCA9519PW118 support arbitration and clock stretching?
- What is the glitch filter duration on the B-side input?
The glitch filter duration on the B-side input is 50 ns.- Can the PCA9519PW118 operate with multiple masters?
- What happens to the I2C-bus pins when the device is unpowered?
The I2C-bus pins are high-impedance when the device is unpowered). - What is the package type of the PCA9519PW118?
