Overview
The P82B96DR, produced by Texas Instruments, is a dual bidirectional bus buffer designed to facilitate bidirectional data transfer between an I2C bus and various other bus configurations with different voltage and current levels. This device is particularly useful for extending the reach of I2C buses, allowing for longer cables and more devices per bus without compromising the bus's integrity. It supports a wide operating power-supply voltage range of 2 V to 15 V, making it versatile for various applications.
Key Specifications
| Parameter | Description | Value |
|---|---|---|
| Package Type | SOIC (D) | 8-pin |
| Operating Temperature Range | °C | -40 to 85 |
| Operating Power-Supply Voltage Range | V | 2 to 15 |
| Bus Capacitance | pF | 400 pF (Main Side), 4000 pF (Transmission Side) |
| Bus Speed | kHz | Up to 400 kHz |
| Latch-Up Performance | mA | Exceeds 100 mA per JESD 78, Class II |
| ESD Protection | Exceeds JESD 22 standards |
Key Features
- Supports bidirectional data transfer between I2C buses and other bus configurations with different voltage and current levels.
- Operates over a wide power-supply voltage range of 2 V to 15 V.
- Allows for longer cables by supporting high bus capacitance (400 pF on the main side and 4000 pF on the transmission side).
- Outputs on the transmission side have high current sink capability for driving low-impedance or high-capacitive buses.
- Compatible with optoelectrical isolators and similar devices by splitting I2C bus signals into forward and reverse signal paths.
- Supports 400-kHz fast I2C bus operation over at least 20 meters of wire.
- Provides galvanic isolation or use of balanced transmission lines (twisted pairs) through separate directional Tx and Rx signals.
Applications
- Extending I2C bus lengths in industrial and automotive systems.
- Interfacing I2C buses with other bus configurations such as SMBus, 3.3 V logic devices, and 15 V levels.
- Improving noise immunity on longer bus lengths by isolating bus capacitance.
- Using in systems that require galvanic isolation or balanced transmission lines.
Q & A
- What is the primary function of the P82B96DR?
The P82B96DR is a dual bidirectional bus buffer that supports bidirectional data transfer between an I2C bus and other bus configurations with different voltage and current levels.
- What is the operating power-supply voltage range of the P82B96DR?
The operating power-supply voltage range is from 2 V to 15 V.
- How does the P82B96DR handle bus capacitance?
The device supports high bus capacitance, allowing 400 pF on the main side and 4000 pF on the transmission side, enabling longer cables.
- What is the maximum bus speed supported by the P82B96DR?
The device supports up to 400 kHz fast I2C bus operation.
- Can the P82B96DR be used with optoelectrical isolators?
- What kind of ESD protection does the P82B96DR offer?
The device exceeds JESD 22 standards for ESD protection.
- How does the P82B96DR handle latch-up performance?
The device's latch-up performance exceeds 100 mA per JESD 78, Class II.
- What is the package type and pin count of the P82B96DR?
The device comes in an SOIC (D) package with 8 pins.
- What is the operating temperature range of the P82B96DR?
The operating temperature range is from -40°C to 85°C.
- Can multiple Sx or Sy I/Os be connected to each other on the same node?
No, two or more Sx or Sy I/Os must not be connected to each other on the same node.
