Overview
The PCA9617ADP, produced by NXP USA Inc., is a CMOS integrated circuit designed to provide level shifting and bidirectional buffering for I2C-bus and SMBus systems. This device enables voltage translation between low voltage (0.8 V to 5.5 V) and higher voltage (2.2 V to 5.5 V) levels, making it versatile for various applications requiring different voltage ranges. The PCA9617A is particularly useful in extending the I2C-bus by isolating two halves of the bus for both voltage and capacitance, thereby enhancing system performance and reliability.
Key Specifications
| Parameter | Value |
|---|---|
| Supply Voltage Range (VCC(A)) | 0.8 V to 5.5 V |
| Supply Voltage Range (VCC(B)) | 2.2 V to 5.5 V |
| Maximum Operating Temperature | -40°C to 85°C |
| Propagation Delay Time | 94 ns |
| Package Type | TSSOP8 |
| Bus Capacitance | Up to 540 pF at 1 MHz, up to 4000 pF at lower speeds |
| Overvoltage Tolerance | Up to 5.5 V on SDA and SCL pins even when unpowered |
Key Features
- Bidirectional level shifting between low voltage (0.8 V to 5.5 V) and higher voltage (2.2 V to 5.5 V) I2C-bus or SMBus systems.
- Footprint and functional replacement for PCA9517A at Fast-mode speeds.
- Isolation of two halves of the bus for both voltage and capacitance, allowing extension of the I2C-bus.
- Overvoltage tolerant inputs and I/Os up to 5.5 V even when the device is unpowered.
- Power-up circuit that keeps output drivers turned off until VCC(B) is above 2.2 V and VCC(A) is above 0.8 V.
- Enable pin (EN) for turning drivers on and off under system control.
Applications
- I2C-bus and SMBus systems requiring voltage level translation.
- Extension of I2C-bus in systems with high capacitance loads.
- Isolation of different voltage domains within a system.
- Automotive and industrial applications where robust and reliable communication is necessary.
- Embedded systems and microcontroller-based projects needing level shifting capabilities.
Q & A
- What is the primary function of the PCA9617ADP?
The PCA9617ADP provides level shifting and bidirectional buffering for I2C-bus and SMBus systems between different voltage levels.
- What is the supply voltage range for VCC(A) and VCC(B)?
VCC(A): 0.8 V to 5.5 V, VCC(B): 2.2 V to 5.5 V.
- What is the maximum operating temperature for the PCA9617ADP?
-40°C to 85°C.
- How much capacitance can the PCA9617ADP handle on each side of the device?
Up to 540 pF at 1 MHz, up to 4000 pF at lower speeds.
- Is the PCA9617ADP overvoltage tolerant?
- Can multiple PCA9617ADP devices be connected in series?
- What is the purpose of the enable pin (EN) on the PCA9617ADP?
The enable pin (EN) allows for turning the drivers on and off under system control.
- What package type is the PCA9617ADP available in?
TSSOP8.
- Can the PCA9617ADP replace the PCA9517A?
- What are some common applications for the PCA9617ADP?
I2C-bus and SMBus systems, extension of I2C-bus, isolation of different voltage domains, automotive and industrial applications, and embedded systems.
