Overview
The PCA9517D,118 is a CMOS integrated circuit designed by NXP USA Inc. that serves as a level translating I²C-bus repeater. This device is capable of providing level shifting between low voltage (down to 0.9 V) and higher voltage (2.7 V to 5.5 V) I²C-bus or SMBus applications. It retains all the operating modes and features of the I²C-bus system during these level shifts, making it an essential component for extending and isolating I²C-bus segments in various systems.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| VCCB Supply Voltage (B-side bus) | 2.7 | - | 5.5 | V |
| VCCA Supply Voltage (A-side bus) | 0.9 | - | 5.5 | V |
| ICC(VCCA) Supply Current | - | - | 1 | mA |
| ICCH HIGH-state Supply Current | - | 1.5 | 5 | mA |
| ICCL LOW-state Supply Current | - | - | 5 | mA |
| Data Rate (Max) | - | - | 400 | kHz |
| Operating Temperature | -40 | - | 85 | °C |
| Package / Case | - | - | 8-SOIC (0.154", 3.90mm Width) | - |
| Mounting Type | - | - | Surface Mount | - |
| Propagation Delay Time | - | - | 170 | ns |
| Input Capacitance | - | - | 6 | pF |
Key Features
- Level shifting between low voltage (down to 0.9 V) and higher voltage (2.7 V to 5.5 V) I²C-bus or SMBus applications.
- Bidirectional buffering for both the data (SDA) and the clock (SCL) lines.
- Supports Standard mode and Fast mode I²C-bus devices and multiple masters.
- Lock-up free operation and supports arbitration and clock stretching across the repeater.
- Open-drain input/outputs and powered-off high-impedance I²C-bus pins.
- ESD protection exceeds 2000 V HBM per JESD22-A114, 150 V MM per JESD22-A115.
- The EN pin can be used to turn the drivers on and off under system control.
Applications
- I²C-bus or SMBus applications requiring level shifting and buffering.
- Extension of I²C-bus segments to overcome voltage and capacitance limitations.
- Isolation of two halves of a bus for both voltage and capacitance.
- Use in systems where multiple I²C-bus masters are present.
- Embedded systems, industrial control, and automotive electronics where reliable I²C communication is crucial.
Q & A
- What is the primary function of the PCA9517D,118?
The PCA9517D,118 is a level translating I²C-bus repeater that provides level shifting between low voltage and higher voltage I²C-bus or SMBus applications.
- What are the supply voltage ranges for the A-side and B-side buses?
The A-side bus operates from 0.9 V to 5.5 V, and the B-side bus operates from 2.7 V to 5.5 V.
- What is the maximum data rate supported by the PCA9517D,118?
The maximum data rate supported is 400 kHz.
- What is the operating temperature range of the PCA9517D,118?
The operating temperature range is from -40°C to 85°C.
- What type of package does the PCA9517D,118 come in?
The PCA9517D,118 comes in an 8-SOIC (0.154", 3.90mm Width) package.
- Does the PCA9517D,118 support multiple I²C-bus masters?
- How does the PCA9517D,118 handle ESD protection?
The PCA9517D,118 has ESD protection that exceeds 2000 V HBM per JESD22-A114, 150 V MM per JESD22-A115.
- Can the drivers of the PCA9517D,118 be controlled externally?
- What is the propagation delay time of the PCA9517D,118?
The propagation delay time is approximately 170 ns.
- Is the PCA9517D,118 RoHS compliant?
