P82B96DGKRG4 - 2-15V I2C Bus Buffer | Texas Instruments
料号： P82B96DGKRG4 ✓ 量产中P82B96DGKRG4 概述
An I2C bus buffer is an interface IC that buffers two bidirectional clock-and-data lines while allowing the buses on either side to use different voltage domains. In the signal-chain hierarchy, the P82B96 is an I2C bus buffer, then a bidirectional bus repeater, then a bus extender, and finally a general-purpose interface IC. This position matters because I2C pull-up networks and bus capacitance can limit reliable communication over longer cables or between physically separated circuit boards.
Key features include support for buses operating at different logic levels, bidirectional transfer of I2C signals, and compatibility with I2C and SMBus systems. The verified 400 kHz frequency identifies the device as a standard-speed rather than high-speed or fast-mode-plus bus extender. Its 2 V to 15 V supply range permits use with low-voltage embedded systems as well as higher-voltage industrial bus interfaces, subject to the individual bus voltage and logic-threshold requirements.
The P82B96 uses a non-latching bidirectional buffer arrangement so each buffered line can carry traffic in either direction. The two-buffer architecture separates the source-side and destination-side bus segments, allowing logic-level translation when the two buses operate at different voltages. The exact enable, ground, voltage-domain, and data-pin assignments require confirmation from the manufacturer datasheet before PCB routing or replacement qualification.
Typical applications include level translation between microcontroller and sensor buses, extending an I2C connection between circuit boards, isolating bus capacitance on longer wiring, and connecting peripheral groups with different supply voltages. The 400 kHz operating limit makes it appropriate for conventional I2C devices rather than designs requiring 1 MHz I2C or faster modes.
The primary design consideration is preserving the correct pull-up arrangement on each bus segment. Adding buffer separation can help isolate capacitance, but inappropriate pull-up strength or excessive cable length can still cause timing failures. Engineers should verify logic thresholds, bus capacitance, rise-time limits, and the exact pinout against the Texas Instruments P82B96 datasheet.
This page consolidates manufacturer and distributor information, source-backed pricing, replacement availability, application guidance, and comparison criteria for engineers evaluating the P82B96DGKRG4. It also distinguishes verified ordering information from parameters that still require direct datasheet confirmation.
直接替换替代料： P82B96DGKRG4 ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
P82B96DGKR
✅ 直接替换联系询价
查看数据手册 →P82B96DGKRG4 规格参数
| Product Type | Dual bidirectional I2C/SMBus buffer and cable extender |
| Number of Buffered Bits | 2 bits |
| Operating Supply Voltage Range | 2 V to 15 V |
| Operating Frequency | 400 kHz |
| Bus Compatibility | I2C and SMBus |
| Data Direction | Bidirectional |
| Logic-Level Translation | Supported between buses operating at different logic levels |
| Buffer Architecture | Non-latching |
| 引脚数 | 8 pins |
| 封装 | 8-VSSOP (0.118 inch, 3.00 mm width) |
| 安装类型 | Surface mount |
| Datasheet Revision | Rev. C |
P82B96DGKRG4 8-vssop (0.118 inch, 3.00 mm width) 引脚配置指南
P82B96DGKRG4（8-vssop (0.118 inch, 3.00 mm width) 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： P82B96DGKRG4.
请参阅 数据手册 以查看完整引脚配置。
典型应用
P82B96DGKRG4 适用于 6 应用s: I2C Logic-Level Translation, Board-to-Board I2C Extension, Embedded Sensor Bus Isolation, Industrial Control Module Interface, Instrumentation and Test Equipment, Portable and Battery-Powered Electronics.
I2C Logic-Level Translation
The P82B96DGKRG4 fits I2C logic-level translation because the Texas Instruments product page identifies support for connecting buses operating at different logic levels. Its 2 V to 15 V operating-supply range supports both low-voltage embedded domains and higher-voltage interface domains, while the 400 kHz operating frequency covers standard-speed I2C traffic. The two buffered lines provide a controlled boundary between the two bus segments without replacing the system's clock-and-data protocol. In implementation, pull-up resistors must be placed on each side of the buffer and selected for that side's voltage and capacitance. The key benefit is that logic translation and bus segmentation are combined in one 8-VSSOP device. The principal constraint is the verified 400 kHz limit, which means it should not be assumed suitable for Fast Mode Plus designs operating above that frequency.
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Board-to-Board I2C Extension
P82B96DGKRG4 is suitable for separating two I2C bus segments when wiring distance or bus capacitance makes a direct connection unreliable. The 2-bit bidirectional architecture buffers both the clock and data paths, and the non-latching behavior supports traffic in either direction on the extended side. Its verified 400 kHz rating targets standard-speed communication. When laying out a board-to-board link, the original and extended segments should each retain appropriate pull-up networks, and signal routing should minimize capacitance. Compared with an unbuffered cable, the P82B96 creates a defined load boundary that can simplify rise-time troubleshooting. The trade-off is that the extender cannot improve the electrical limits of an overlong cable unless the system also conforms to the device's bus-loading and timing requirements.
推荐
Embedded Sensor Bus Isolation
The P82B96DGKRG4 can isolate a group of sensors from a higher-capacitance controller bus while preserving standard-speed I2C communication. The device supports bidirectional data transfer and buses with different logic levels, allowing a sensor domain and controller domain to be separated without duplicating the bus protocol in software. Its 400 kHz operating frequency is appropriate for common environmental, motion, and interface sensors, while the 8-VSSOP package supports compact layouts. In a sensor-node design, use separate pull-ups for the source and extended bus sections and verify that every peripheral remains within its address and timing requirements. The measurable benefit is bus segmentation and level compatibility in one component, while the limitation is that propagation delay and capacitance limits must be confirmed from the full datasheet before finalizing timing margins.
推荐
Industrial Control Module Interface
P82B96DGKRG4 is appropriate for industrial control modules that need to connect I2C peripherals operating at different logic voltages from a controller domain. Its 2 V to 15 V supply range offers flexibility across low-voltage embedded logic and higher-voltage interface rails, while the 400 kHz frequency suits conventional control and monitoring buses. The device does not add protocol conversion, so both bus sides must remain compatible with I2C or SMBus signaling. System designers should treat the buffer as a controlled isolation boundary rather than a general-purpose level shifter for every logic family. Pull-up selection, fault behavior during partial power-down, and the maximum allowed bus capacitance require confirmation from the manufacturer data sheet. The advantage over an uncontrolled connection is the ability to define separate logic domains and reduce loading on the controller-side bus.
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Instrumentation and Test Equipment
The P82B96DGKRG4 can buffer an I2C control or measurement peripheral bus in instrumentation where the controller and peripheral electronics use different supply domains. The bidirectional 2-bit arrangement keeps clock and data behavior consistent with I2C, and the 400 kHz operating frequency supports many control-oriented sensor and configuration devices. In a test system, separating a measurement peripheral bus from the controller can help prevent peripheral capacitance from degrading edge timing. The engineer must still validate rise times under the intended pull-up strength and cable or PCB loading. Because the supplied data does not state a temperature rating, capacitance limit, or propagation-delay value, those parameters require direct confirmation from the current Texas Instruments data sheet before using the device in safety-critical or high-availability measurement systems.
推荐
Portable and Battery-Powered Electronics
P82B96DGKRG4 is relevant to compact portable equipment because the 2 V minimum supply supports low-voltage logic systems and the 8-VSSOP package limits board area. It can divide an I2C bus between a controller and a peripheral group with different logic levels or provide a segmented bus when device loading becomes significant. Since the verified data does not provide quiescent current, battery-life calculations must wait for that parameter. Pull-up resistance also determines average bus current in active-low I2C signaling, so the buffer itself is not the only power consideration. The part's 400 kHz limit is adequate for many standard-speed sensors and configuration ports. Compared with discrete transistors or passive level-shifting networks, the integrated non-latching buffer offers consistent bidirectional behavior in a standardized 8-pin package, subject to final pinout verification.
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推荐产品汇总
工程参考数据： P82B96DGKRG4 ——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 | P82B96DGKR |
|---|---|---|
| Package | 8-VSSOP (0.118 inch, 3.00 mm width) | 8-VSSOP (0.118 inch, 3.00 mm width) |
| Brand | Texas Instruments | Texas Instruments |
| Product Function | Dual bidirectional I2C/SMBus buffer and cable extender | Dual bidirectional I2C/SMBus buffer and cable extender |
| Operating Supply Voltage Range | 2 V to 15 V | 2 V to 15 V |
| Operating Frequency | 400 kHz | 400 kHz |
| Number of Buffered Bits | 2 bits | 2 bits |
| Bus Compatibility | I2C and SMBus | I2C and SMBus |
| Logic-Level Translation | Supported between buses operating at different logic levels | Supported between buses operating at different logic levels |
| Number of Pins | 8 pins | 8 pins |
| Buffer Architecture | Non-latching bidirectional | Non-latching bidirectional |
关键差异点
- Combines bidirectional bus buffering and level translation （对比 P82B96DGKR)
- Supports standard-speed I2C and SMBus extension （对比 P82B96DGKR)
- Wide supply-voltage compatibility （对比 P82B96DGKR)
设计说明
Keep the P82B96 close to the point where the two bus segments physically separate. Route the source-side clock and data pair away from the buffered clock and data pair rather than joining both sides with broad copper, because the buffer is intended to control the boundary between them. Provide a continuous ground reference under the device and between the two bus domains, and place each side's pull-up resistors close to the corresponding bus pins to minimize parasitic capacitance and improve rise time.
Calculate pull-up resistance from the target bus voltage, total bus capacitance, sink current limit, and required rise time instead of copying one resistor value to every bus segment. The buffered sides should normally have separate pull-up networks because each segment has its own capacitance. Also check the 400 kHz operating limit against the slowest I2C peripheral and the data sheet's propagation-delay and bus-capacitance limits before committing the layout.
Do not treat the P82B96 as a general-purpose directional level translator; its verified function is a non-latching, bidirectional I2C and SMBus buffer. Confirm the exact 8-pin assignments from the Texas Instruments package drawing before connecting the device. The G4 designation must also be checked against the approved BOM and environmental ordering requirements rather than being interpreted as an electrical grade change without manufacturer documentation.
合规信息
The supplied verified results do not explicitly state the required compliance status for this orderable MPN. The G4 ordering designation should not be interpreted as proof of RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals compliance without manufacturer documentation.
