PCA9515ADT

Product Overview

Category: Integrated Circuit (IC)

Use: Level shifting and buffering between low voltage (LV) and high voltage (HV) I2C-bus or SMBus applications.

Characteristics: - Bidirectional voltage-level translator - Supports I2C-bus and SMBus protocols - Compatible with 2.3V to 5.5V LV and HV levels - Provides bidirectional buffering for SDA and SCL lines - Supports clock stretching and arbitration across the bus - Low standby current consumption - ESD protection exceeds 2000V HBM per JESD22-A114, 200V MM per JESD22-A115, and 1000V CDM per JESD22-C101

Package: TSSOP-8

Essence: The PCA9515ADT is an IC that facilitates level shifting and buffering between low voltage (LV) and high voltage (HV) I2C-bus or SMBus applications. It allows seamless communication between devices operating at different voltage levels.

Packaging/Quantity: The PCA9515ADT is available in a TSSOP-8 package. It is typically sold in reels of 2500 units.

Specifications

• Supply Voltage Range (VCCA): 2.3V to 5.5V
• Supply Voltage Range (VCCB): 1.65V to 5.5V
• Operating Temperature Range: -40°C to +85°C
• Standby Current: 10µA (max)
• Rise/Fall Time (10% to 90%): 20ns (typ)
• Propagation Delay (SDA/SCL): 10ns (typ)
• ESD Protection: >2000V (HBM), >200V (MM), >1000V (CDM)

Pin Configuration

The PCA9515ADT has a total of 8 pins, which are assigned specific functions as follows:

1. VCCA: LV Supply Voltage
2. SDA: LV I2C-bus Data Line
3. SCL: LV I2C-bus Clock Line
4. OE: Output Enable
5. GND: Ground
6. VCCB: HV Supply Voltage
7. SDAOUT: HV I2C-bus Data Line
8. SCLOUT: HV I2C-bus Clock Line

Functional Features

• Bidirectional voltage-level translation between LV and HV I2C-bus or SMBus applications.
• Provides buffering for SDA and SCL lines to ensure signal integrity.
• Supports clock stretching and arbitration across the bus, allowing multiple devices to communicate seamlessly.
• Low standby current consumption helps conserve power in battery-operated devices.
• ESD protection exceeds industry standards, ensuring robustness against electrostatic discharges.

Advantages and Disadvantages

Advantages: - Enables communication between LV and HV devices without the need for additional level shifting components. - Supports popular I2C-bus and SMBus protocols. - Wide supply voltage range allows compatibility with various systems. - Compact TSSOP-8 package offers space-saving integration.

Disadvantages: - Limited to I2C-bus and SMBus applications, not suitable for other communication protocols. - May introduce slight propagation delay due to level shifting circuitry.

Working Principles

The PCA9515ADT operates by translating the voltage levels of the I2C-bus or SMBus signals between the LV and HV domains. It uses a bidirectional voltage-level translator to convert the logic levels while maintaining signal integrity. The device also provides buffering for the SDA and SCL lines to ensure reliable communication.

When the LV and HV supplies are connected, the PCA9515ADT automatically detects the voltage levels and adjusts its internal circuitry accordingly. It supports clock stretching and arbitration across the bus, allowing multiple devices to communicate seamlessly.

Application Field Plans

The PCA9515ADT finds applications in various scenarios where level shifting and buffering between LV and HV I2C-bus or SMBus devices are required. Some potential application fields include:

1. Industrial Automation: Facilitating communication between LV and HV sensors, actuators, and control systems.
2. Consumer Electronics: Enabling interaction between LV and HV devices such as smartphones, tablets, and peripherals.
3. Automotive Systems: Supporting communication between LV and HV components in automotive electronics, including infotainment systems, sensors, and modules.
4. Medical Devices: Allowing seamless integration of LV and HV medical equipment for data exchange and control.

Alternative Models

• PCA9306: Dual bidirectional I2C-bus and SMBus voltage-level translator with automatic direction sensing.
• TXB0108: 8-bit bidirectional voltage-level translator with automatic direction sensing.