Overview
The P82B715DRG4, produced by Texas Instruments, is a bipolar IC designed for buffering highly-capacitive I2C bus systems. It supports bidirectional data transfer through the I2C bus, buffering both the serial data (SDA) and serial clock (SCL) signals. This device allows for the extension of the I2C bus while retaining all the operating modes and features of the I2C system. It is particularly useful in applications where the I2C bus capacitance limit restricts practical communication distances, enabling longer cable lengths and improved noise immunity.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Operating Power-Supply Voltage Range | 3 to 12 | V |
| Bus Capacitance (Main I2C Bus) | 400 | pF |
| Bus Capacitance (Transmission Side) | 3000 | pF |
| Buffer Type | Dual Bidirectional Unity-Voltage-Gain Buffer | |
| ESD Protection | 2500-V Human-Body Model, 400-V Machine Model, 1000-V Charged-Device Model | |
| Operating Temperature Range | -40 to 85 | °C |
| Package Type | SOIC (8 pins) | |
| Package Size | 4.90 mm × 3.91 mm |
Key Features
- Supports bidirectional data transfer of I2C bus signals.
- Allows for the extension of the I2C bus over 50 meters of twisted-pair wire.
- Drives 10× lower-impedance bus wiring for improved noise immunity.
- Multi-drop distribution of I2C signals using low-cost twisted-pair cables.
- Latch-up performance exceeds 100 mA per JESD 78, Class II.
- ESD protection exceeds JESD 22 standards.
- No external directional control required for the buffer.
Applications
- HDMI DDC (Display Data Channel).
- Long I2C communications, especially in scenarios requiring extended cable lengths.
- Industrial communications where reliable and noise-immune data transfer is crucial.
Q & A
- What is the primary function of the P82B715DRG4?
The primary function of the P82B715DRG4 is to buffer highly-capacitive I2C bus systems, supporting bidirectional data transfer and extending the practical communication distance of the I2C bus.
- What is the operating power-supply voltage range of the P82B715DRG4?
The operating power-supply voltage range is from 3 V to 12 V).
- How much bus capacitance can the P82B715DRG4 handle on the main I2C bus and transmission side?
The device can handle up to 400 pF on the main I2C bus and up to 3000 pF on the transmission side).
- What type of buffer does the P82B715DRG4 use?
The P82B715DRG4 uses a dual bidirectional unity-voltage-gain buffer with no external directional control required).
- What are the ESD protection specifications of the P82B715DRG4?
The device exceeds JESD 22 standards with 2500-V Human-Body Model, 400-V Machine Model, and 1000-V Charged-Device Model protection).
- What is the maximum operating temperature range for the P82B715DRG4?
The operating temperature range is from -40°C to 85°C).
- How does the P82B715DRG4 improve noise immunity?
The device drives 10× lower-impedance bus wiring, which improves noise immunity).
- Can the P82B715DRG4 be used in multi-drop configurations?
Yes, the P82B715DRG4 supports multi-drop distribution of I2C signals using low-cost twisted-pair cables).
- What are some common applications of the P82B715DRG4?
Common applications include HDMI DDC, long I2C communications, and industrial communications).
- How does the P82B715DRG4 handle latch-up performance?
The device's latch-up performance exceeds 100 mA per JESD 78, Class II).
