P82B96DGKR - 2-15V 400kHz I2C Buffer | Texas Instruments
料号： P82B96DGKR ✓ 量产中P82B96DGKR 概述
An I2C buffer is an interface IC that regenerates or isolates bus signals while preserving bidirectional open-drain communication. Within the product hierarchy, the P82B96 belongs to the buffer, repeater, and signal-conditioning class of interface ICs used in embedded, industrial, and consumer electronics. Its role is not simply signal amplification: the device establishes a controlled bidirectional interface between a host-side I2C bus and a second bus segment with potentially different voltage and current characteristics.
The principal features include two independently buffered bidirectional channels, a broad 2 V to 15 V operating supply range, and operation up to 400 kHz. The wide supply range supports compatibility with 2.5 V, 3.3 V, 5 V, 9 V, and 12 V bus environments identified in the available component data. Its 8-pin VSSOP package provides a compact physical implementation for boards where routing area and component count are important. The absence of a direction-control input also simplifies use with open-drain I2C and SMBus signaling.
The P82B96 uses slightly different logic-low thresholds on its two sides to avoid latching when the bidirectional signal paths are active. Texas Instruments explicitly states that two or more Sx or Sy I/O pins must not be connected together on the same node. This architecture allows the buffer to support bidirectional transfers automatically, but it requires correct bus topology and suitable pull-up placement to prevent contention or unintended current paths.
Typical uses include isolating one I2C segment from another, extending an I2C bus across a larger board, connecting control boards with different logic voltages, and isolating cable-connected sensors or EEPROMs. The buffer is especially useful where long traces, connectors, cable capacitance, or multiple bus nodes could weaken the original bus signal. Designers must still validate rise time, pull-up resistance, capacitance, and the maximum number of supported devices.
When designing around the P82B96, place the device close enough to the remote bus segment to limit the unbuffered section, while keeping the host-side bus short and well controlled. Verify pull-up placement, confirm that both sides operate within their specified logic-voltage limits, and avoid connecting multiple Sx or Sy pins to one node. The available manufacturer and distributor information does not provide a complete timing diagram or detailed electrical limits in the supplied excerpts.
This product page consolidates verified manufacturer specifications, distributor pricing, ordering information, and package details into an engineering-focused reference. It also identifies the limited set of same-footprint alternatives that could be verified from the available cross-reference data, avoiding unsupported cross-package substitutions that would require PCB changes.
直接替换替代料： P82B96DGKR ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： P82B96DGKR （相同外形与封装尺寸） ——差异在于 Package.
P82B96DG4
✅ 直接替换 ⚠️ 规格未核验联系询价
查看数据手册 →P82B96DGKG4
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
P82B96DGK
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
P82B96DGKR 规格参数
| Product Type | 2-bit bidirectional I2C/SMBus buffer and cable extender |
| Number of Bidirectional Channels | 2 channels |
| Operating Supply Voltage Range | 2 V to 15 V |
| Maximum Bus Frequency | 400 kHz |
| Supported Logic Levels | 2 V, 2.5 V, 3.3 V, 5 V, 9 V, and 12 V |
| Bidirectional Signal Support | 2-bit bidirectional data transfer |
| Direction Control | No direction-control pin |
| 工作温度范围 | -40 °C to +85 °C |
| Operating Supply Current | 4 mA |
| 封装 | 8-pin VSSOP (DGK) |
| 引脚数量 | 8 pins |
| 安装类型 | Surface mount |
| Shipping Package | Tape and reel |
| ECCN | EAR99 |
| Country of Origin | Thailand |
| Introduction Date | February 1, 2006 |
| Estimated End-of-Life Date | 2031 |
P82B96DGKR tape and reel 引脚配置指南
P82B96DGKR（tape and reel 封装）的引脚配置。 引脚编号、功能和连接图在制造商数据手册中定义。请参阅该手册以了解确切的封装尺寸和焊接指南。
暂无详细引脚数据： P82B96DGKR.
请参阅 数据手册 以查看完整引脚配置。
典型应用
P82B96DGKR 适用于 6 应用s: I2C Bus Isolation, Industrial Sensor Interfaces, Cable-Connected I2C Devices, Mixed-Voltage Embedded Systems, EEPROM and Memory Bus Extension, Multi-Board Control Systems.
I2C Bus Isolation
The P82B96DGKR fits I2C bus isolation because it provides two bidirectional channels without requiring a direction-control pin, allowing the host-side and remote-side buses to operate with different logic levels. According to the Texas Instruments product page, the device supports a 2 V to 15 V operating range and communication up to 400 kHz. Placing it between two bus sections can isolate loading from one segment and limit fault or noise propagation. The remote section still requires correctly sized pull-ups, adequate grounding, and validation of rise time and bus capacitance.
推荐
Industrial Sensor Interfaces
The P82B96DGKR is useful for industrial sensor interfaces where a remote I2C sensor or controller sits behind a connector, cable, or long PCB trace. Its 400 kHz operating rate accommodates standard and fast-mode I2C, while the 2 V to 15 V supply range supports 3.3 V, 5 V, 9 V, and 12 V system levels identified in the available data. Buffering the remote segment reduces its influence on the primary bus, but the design must still account for cable capacitance, pull-up current, industrial noise, and common-mode grounding.
推荐
Cable-Connected I2C Devices
The P82B96DGKR can buffer an I2C connection to a cable-connected peripheral when board-to-board wiring makes direct bus loading impractical. The two bidirectional paths maintain host-to-peripheral and peripheral-to-host transfers automatically, and the 400 kHz rate provides a defined operating ceiling. In a cable application, use the buffered side for the more remote segment, place the IC near the cable connector, and verify pull-up placement. Cable length, capacitance, ESD protection, and the peripheral's bus capacitance must be evaluated independently.
推荐
Mixed-Voltage Embedded Systems
The P82B96DGKR fits embedded systems in which a 3.3 V controller must communicate with a 5 V peripheral or another mixed-voltage bus domain. Its verified operating range extends from 2 V to 15 V, and Texas Instruments describes support for buses having different voltage and current levels. The device's slightly different logic-low thresholds on its two sides help prevent latching during bidirectional communication. Correct selection of each side's pull-up voltage is essential, and signal levels should be checked against the manufacturer's complete electrical characteristics.
推荐
EEPROM and Memory Bus Extension
The P82B96DGKR can extend an I2C path to an EEPROM or other memory peripheral when board routing makes the direct bus difficult to keep clean. With two bidirectional channels and a 400 kHz maximum frequency, it provides controlled isolation for one memory segment without adding a direction pin to the firmware. The design benefit is a shorter local bus around the memory device and clearer segmentation of capacitive loading. Engineers should still verify the memory's maximum bus capacitance, address pull-ups, rise time, and the P82B96's allowed operating conditions.
推荐
Multi-Board Control Systems
The P82B96DGKR supports multi-board control systems that distribute I2C traffic between a main controller and one or more peripheral boards. Its two-channel architecture allows a pair of buses to be buffered independently, and the broad 2 V to 15 V range accommodates differing board logic levels. The part is particularly helpful when a connector, long trace, or independently loaded section would otherwise remain part of the same electrical bus. System-level validation should include grounding strategy, connector pinout, pull-up placement, bus rise time, and worst-case peripheral loading.
推荐
推荐产品汇总
工程参考数据： P82B96DGKR ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | P82B96DG4 | P82B96DGKG4 | P82B96DGK |
|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Package | VSSOP-8 (DGK) | VSSOP-8 (DGK) - same package | VSSOP-8 (DGK) - same package | VSSOP-8 (DGK) - same package |
| Product Function | 2-bit bidirectional I2C/SMBus buffer | 2-bit bidirectional I2C/SMBus buffer | 2-bit bidirectional I2C/SMBus buffer | 2-bit bidirectional I2C/SMBus buffer |
| Operating Supply Voltage | 2 V to 15 V | 2 V to 15 V | 2 V to 15 V | 2 V to 15 V |
| Maximum Bus Frequency | 400 kHz | 400 kHz | 400 kHz | 400 kHz |
| Number of Channels | 2 bidirectional channels | 2 bidirectional channels | 2 bidirectional channels | 2 bidirectional channels |
| Direction Control | No direction-control pin | No direction-control pin | No direction-control pin | No direction-control pin |
关键差异点
- Wide operating range supports several I2C logic domains （对比 PCA9600DP)
- Two bidirectional channels simplify segment isolation （对比 P82B96DR)
- Defined fast-mode-compatible operating speed （对比 P82B96PWR)
设计说明
Do not connect two or more Sx or Sy I/O pins to the same electrical node, as stated in the Texas Instruments P82B96 documentation. Doing so can create unintended current paths between the buffered bus sections. Keep each Sx and Sy net as a separate bus segment, use the device as a two-channel buffer, and verify that the PCB does not unintentionally connect the input and output sides through test points, straps, or prototyping wires.
Place the P82B96 close to the connector or remote-device side of the protected bus, then keep the remote trace short and the pull-up resistor close to the buffered node. The host-side segment should remain a conventional low-capacitance I2C bus. Because the P82B96 provides bidirectional pass-through behavior without a direction pin, incorrect routing around the package can negate the isolation benefit and expose both bus segments to the same loading or fault.
Validate the completed bus with the slowest supported operating condition, including cable or PCB capacitance, pull-up resistance, peripheral input capacitance, and the intended 400 kHz communication rate. A faster bus edge than the receiving device can tolerate may still cause timing errors even when the nominal frequency is below 400 kHz. Use the manufacturer timing and electrical data to select pull-ups and confirm rise time rather than relying only on nominal clock frequency.
合规信息
The supplied cross-reference data reports ECCN EAR99, country of origin Thailand, and an estimated end-of-life date of 2031, but it does not provide verifiable RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals statements. No compliance qualification was inferred.
