Overview
The PCA9515AD,112 is a CMOS integrated circuit designed by NXP USA Inc. for use in I²C-bus and SMBus systems. This component retains all the operating modes and features of the I²C-bus system, making it an essential tool for extending and enhancing I²C-bus capabilities. The PCA9515AD allows system designers to isolate two halves of a bus, enabling the accommodation of more devices or longer bus lengths, which is particularly useful in complex system designs.
Key Specifications
| Parameter | Description |
|---|---|
| Package Type | SO8, TSSOP8, HWSON8 |
| Supply Voltage | Up to 5.5 V |
| Operating Temperature | -40°C to +85°C |
| I²C-Bus Speed | Up to 400 kHz |
| Bus Capacitance | Up to 400 pF per bus segment |
| ESD Protection | Exceeds 2000 V HBM per JESD22-A114 and 1000 V CDM per JESD22-C101 |
| Latch-up Testing | Exceeds 100 mA per JEDEC Standard JESD78 |
| Pins | 8 pins (including SCL0, SCL1, SDA0, SDA1, GND, EN, VCC) |
Key Features
- Buffers both the data (SDA) and the clock (SCL) lines, enabling the extension of the I²C-bus.
- Supports two separate I²C-bus segments, each with up to 400 pF capacitance.
- Allows for the isolation of two bus segments, enabling the use of different voltage levels (e.g., 5 V and 3.3 V) or different bus speeds (e.g., 400 kHz and 100 kHz).
- Active HIGH repeater enable input with internal pull-up resistor.
- Open-drain 5 V tolerant I/O pins.
- ESD protection and latch-up testing compliant with industry standards.
Applications
- Extension of I²C-bus systems to accommodate more devices or longer bus lengths.
- Isolation of different voltage levels or bus speeds within the same system.
- Use in complex system designs where multiple I²C-bus segments need to be managed.
- Industrial, automotive, and consumer electronics where reliable I²C-bus communication is critical.
Q & A
- What is the primary function of the PCA9515AD?
The PCA9515AD is designed to buffer both the data (SDA) and the clock (SCL) lines of an I²C-bus, allowing for the extension and isolation of I²C-bus segments.
- What are the supported package types for the PCA9515AD?
The PCA9515AD is available in SO8, TSSOP8, and HWSON8 packages.
- What is the maximum operating temperature for the PCA9515AD?
The PCA9515AD operates within a temperature range of -40°C to +85°C.
- Can the PCA9515AD be used to isolate different voltage levels on the same bus?
Yes, the PCA9515AD can be used to isolate different voltage levels (e.g., 5 V and 3.3 V) on the same bus.
- What is the maximum I²C-bus speed supported by the PCA9515AD?
The PCA9515AD supports I²C-bus speeds up to 400 kHz.
- Does the PCA9515AD have ESD protection?
Yes, the PCA9515AD has ESD protection that exceeds 2000 V HBM per JESD22-A114 and 1000 V CDM per JESD22-C101.
- Can multiple PCA9515AD devices be cascaded in series?
No, the PCA9515AD design does not allow for cascading multiple devices in series.
- What is the purpose of the EN pin on the PCA9515AD?
The EN pin is an active HIGH repeater enable input with an internal pull-up resistor.
- Are the I/O pins of the PCA9515AD 5 V tolerant?
Yes, the I/O pins of the PCA9515AD are open-drain and 5 V tolerant.
- What are some common applications for the PCA9515AD?
The PCA9515AD is commonly used in industrial, automotive, and consumer electronics for extending and isolating I²C-bus segments.
