P82B96PN - Dual 2-15V I2C Bus Buffer | NXP Semiconductors
MPN: P82B96PN ✓ Hoạt độngP82B96PN Tóm tắt
An I2C bus buffer is an interface IC that electrically isolates or reorganizes bidirectional bus signals while preserving two-wire communication. The P82B96 belongs to the buffer and line-driver hierarchy within interface ICs and power-management-adjacent signal conditioning. Its two independent I2C channels handle SCL and SDA signals, providing controlled signal routing for boards, modules, or cable-linked devices where direct capacitive loading or bus segmentation would otherwise reduce reliability.
The principal operating specifications are a 2 V to 15 V supply-voltage range, support for I2C operation up to 400 kHz, and a temperature range from -40 °C to +85 °C. The device provides separate Tx, Rx, Ty, and Ry signals alongside the Sx and Sy bus-side pins, allowing each I2C channel to be divided into forward and reverse paths. Its low supply-current design is suitable for power-conscious embedded systems.
Technically, the P82B96 uses bidirectional I2C-capable I/O structures rather than a unidirectional buffer with an external direction-control pin. According to the manufacturer datasheet, the Sx and Sy side accepts normal I2C logic levels and can also connect to Tx or Rx signals from another P82B96. The Tx/Rx and Ty/Ry pins use standard I2C logic levels, while the bus-side low-voltage behavior is intentionally slightly different to avoid latching.
Typical uses include isolating an I2C master from a remote sensor module, extending the usable separation between two bus nodes, splitting SCL and SDA into directional test paths, and supporting cable-based I2C links in industrial or consumer equipment. The 2 V to 15 V supply range accommodates conventional 2.5 V, 3.3 V, 5 V, and higher-voltage interface environments where device-level compatibility is confirmed.
Designers should verify all logic-level thresholds, capacitance, propagation delay, and bus timing against the NXP datasheet before relying on the buffer in a new system. Decoupling and signal-routing practices must prevent the remote bus node from introducing excessive loading, ringing, or unintended multiple-driver conditions. Two or more Sx or Sy I/O nodes must not be connected together on the same node.
This product record combines verified NXP specifications, distributor availability references, same-package replacement analysis, and practical design guidance. It identifies the documented benefits and constraints of the P82B96PN while distinguishing true DIP-8 alternatives from parts that require a different footprint.
Bộ thay thế dễ dàng lắp đặt cho P82B96PN — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với P82B96PN (cùng hình factor và footprint) — khác nhau ở Package, Mounting Type, Number of Channels, Bidirectional Data Transfer, Maximum Operating Frequency.
P82B96P
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →P82B96PE4
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
P82B96PWG4
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →P82B96PN Thông số kỹ thuật
| Product Type | Dual bidirectional I2C bus buffer |
| Number of I2C Interfaces | 2 channels |
| Operating Voltage Range | 2 V to 15 V |
| Maximum I2C Bus Frequency | 400 kHz |
| Khoảng nhiệt độ hoạt động | -40 °C to +85 °C |
| Hộp | SOT97-1, 8-pin plastic DIP |
| Kiểu lắp đặt | Through-hole |
| Bidirectional Data Transfer | Supported |
| Bus-Side Signals | Sx and Sy |
| Forward and Reverse Path Signals | Tx, Rx, Ty, and Ry |
| I2C Logic Compatibility | Standard I2C-bus logic levels |
Cấu hình chân P82B96PN
| Chân 1 | Sx — Bidirectional I2C bus-side signal for the first channel |
| Chân 2 | Sy — Bidirectional I2C bus-side signal for the second channel |
| Chân 3 | GND — Ground reference |
| Chân 4 | Tx — Forward-path I2C signal for the first channel |
| Chân 5 | Rx — Reverse-path I2C signal for the first channel |
| Chân 6 | VCC — Positive supply input |
| Chân 7 | Ty — Forward-path I2C signal for the second channel |
| Chân 8 | Ry — Reverse-path I2C signal for the second channel |
Ứng dụng tiêu biểu
P82B96PN phù hợp cho 6 Áp dụngs: I2C Bus Isolation, I2C Cable Extension, Sensor Module Interconnection, Board-to-Board I2C Routing, Industrial Control Module, I2C Signal Test and Debug.
I2C Bus Isolation
The P82B96PN is suitable for electrically separating a local I2C master from a remote bus section while preserving bidirectional communication. Its two channels can support SCL and SDA, and the NXP manufacturer datasheet specifies operation from 2 V to 15 V at up to 400 kHz. The Sx and Sy bus-side pins connect to the local bus, while Tx/Rx and Ty/Ry provide separate paths for each direction. This arrangement helps isolate capacitive loading, although the complete design must still satisfy I2C timing and logic-level limits. Two Sx or Sy I/O nodes must not be connected together on the same node.
Được đề xuất
I2C Cable Extension
The P82B96PN can form part of a cable-based I2C link because it provides separate Tx/Rx and Ty/Ry paths in addition to the Sx/Sy bus connections. Its documented 400 kHz I2C capability and 2 V to 15 V supply range provide a defined operating basis for remote sensor or communication modules. The actual usable cable length is not specified in the supplied data and depends on capacitance, pull-up resistance, propagation delay, noise, and the attached devices. Engineers should validate the complete remote-node timing rather than deriving cable distance solely from the 400 kHz figure.
Được đề xuất
Sensor Module Interconnection
The P82B96PN fits modular sensor systems where a local controller communicates with a remote I2C sensor over separated SCL and SDA paths. Supporting two independent channels allows the design to route both clock and data through the same buffer device, while the Tx/Rx and Ty/Ry outputs provide access to forward and reverse signal paths. With a 2 V to 15 V operating range, the interface can suit multiple supply environments, but the sensor's I/O thresholds must be checked against every side of the buffer. Pull-ups and node loading must remain compatible with the manufacturer timing and capacitance specifications.
Được đề xuất
Board-to-Board I2C Routing
The P82B96PN can organize an I2C connection between two circuit boards when direct routing would place substantial capacitive loading on the controller. The Sx and Sy nodes connect to one side of the interface, and Tx/Rx and Ty/Ry provide distinct paths toward the other side. Its dual-channel architecture simplifies handling of both SCL and SDA in a single 8-pin DIP package. Because this is a bidirectional buffer rather than a repeater with an explicit direction pin, the PCB must avoid unintended multiple-driver or parallel-node connections and should preserve the logic-level behavior described in the NXP datasheet.
Được đề xuất
Industrial Control Module
The P82B96PN can be used in industrial control modules that communicate with remote sensors or actuator controllers over I2C. Its specified -40 °C to +85 °C operating-temperature range and 2 V to 15 V supply capability suit many industrial interface environments. The bidirectional structure avoids adding a separate direction-control signal, which reduces host I/O requirements when both ends of the link can transmit. Robustness still depends on the application's noise, grounding, surge exposure, and bus-capacitance conditions; these environmental protections are external to the IC and should be evaluated separately.
Được đề xuất
I2C Signal Test and Debug
The separate Tx/Rx and Ty/Ry paths make the P82B96PN useful when engineers need directional access to an I2C link during board characterization. Instead of treating SCL and SDA only as a single bidirectional wire, the buffer exposes forward and reverse paths for probing or system partitioning. The device supports operation up to 400 kHz and includes two interface channels for SCL and SDA. Test setups must preserve the manufacturer's electrical limits and avoid connecting two Sx or Sy outputs to the same node. Probe loading and the selected instrument should also be included in the signal-integrity validation.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho P82B96PN — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | P82B96P | P82B96PE4 | P82B96PWG4 |
|---|---|---|---|---|
| Brand | NXP Semiconductors | Texas Instruments | Texas Instruments | Texas Instruments |
| Package | SOT97-1, 8-pin plastic DIP | PDIP-8 - same footprint | PDIP-8 - same footprint | PDIP-8 - same footprint |
| Product Function | Dual bidirectional I2C bus buffer | Dual bidirectional I2C bus buffer | Dual bidirectional I2C bus buffer | Dual bidirectional I2C bus buffer |
| Operating Voltage Range | 2 V to 15 V | 2 V to 15 V | 2 V to 15 V | 2 V to 15 V |
| Maximum I2C Frequency | 400 kHz | 400 kHz | 400 kHz | 400 kHz |
| Number of Channels | 2 | 2 | 2 | 2 |
| Bidirectional Signal Paths | Sx, Sy, Tx, Rx, Ty, and Ry | Sx, Sy, Tx, Rx, Ty, and Ry | Sx, Sy, Tx, Rx, Ty, and Ry | Sx, Sy, Tx, Rx, Ty, and Ry |
Bảo phân biệt quan trọng
- Direct dual-channel directional path access (vsP82B96P)
- Wide operating-voltage range with the same DIP footprint (vsP82B96PE4)
- 400 kHz dual I2C-buffer operation (vsP82B96PWG4)
Ghi chú thiết kế
Do not connect two Sx or Sy I/O nodes together on the same bus node. The NXP manufacturer datasheet explicitly states that the P82B96 design does not support this configuration. Such a connection can create unintended parallel drivers, inconsistent logic-low behavior, or latch conditions. Draw each bus-side connection as a distinct routed node and verify the PCB netlist for accidental shorts between Sx, Sy, and the associated forward or reverse paths.
Validate the complete I2C path for capacitance, pull-up strength, propagation delay, and edge quality before extending the bus through a cable or board-to-board link. The P82B96PN is documented for I2C operation up to 400 kHz, but that frequency does not by itself establish maximum cable length. Include the connector, cable, remote-device capacitance, and test-probe loading in the timing budget, and confirm that the logic-level thresholds remain valid at every powered or unpowered node.
Place the P82B96PN close to the interface boundary and keep Sx, Sy, Tx, Rx, Ty, and Ry traces short and appropriately terminated according to the system topology. Provide a low-impedance ground reference and route the supply connection with normal local decoupling practices. Avoid creating long stubs on either side of the buffer, because stub loading and reflections can reduce signal margin even when the nominal bus frequency remains below 400 kHz.
Thông tin tuân thủ
The supplied verified results do not explicitly state RoHS, REACH, lead-free, halogen-free, conflict-minerals, or AEC-Q100 status. AEC-Q100 is marked not_applicable because the target is an interface IC rather than an explicitly identified automotive-qualified device; no qualification claim is inferred.
