P82B715DRG4 - 2-Bit 3-12V I2C Bus Extender | Texas Instruments
部品番号: P82B715DRG4 ✓ 生産中P82B715DRG4 概要
An I2C bus extender is an interface IC that regenerates or buffers a two-wire serial bus. The I2C interface hierarchy consists of I2C and SMBus systems, serial bus extenders, bidirectional bus buffers, interface ICs, and semiconductors. Rather than adding another protocol controller, the P82B715 works with the existing clock and data lines, allowing a separated bus segment to communicate with the main bus while retaining standard operating modes.
Key features include two independently buffered bidirectional channels, a 3 V to 12 V operating-power-supply range, 400 kHz bus operation, and support for a practical wiring capacitance of 3 nF. The manufacturer describes the device as a bipolar IC intended for I2C-bus and derivative systems. Its buffered Lx and Ly connections are designed to sink the larger currents needed when operating a high-capacitance bus at higher speed.
The P82B715 architecture addresses voltage drop and effective bus capacitance rather than increasing the data rate beyond 400 kHz. Unidirectional analog current amplification gives the extender sufficient drive strength for longer wiring, while the buffered separation between the Sx/Sy and Lx/Ly sides helps isolate high-capacitance cable sections from the main bus. One reported propagation-delay value is 250 ns, making timing behavior a relevant consideration in long or heavily loaded installations.
Typical uses include long industrial-control wiring, sensor and actuator networks, building-automation modules, embedded systems that need additional bus distance, and SMBus-derived equipment. The device is especially relevant when the calculated cable capacitance approaches the normal I2C limit but the system can retain 3 V to 12 V supply compatibility and 400 kHz operation.
The primary design concern is confirming that the host bus can tolerate the extender's operating characteristics and that the separated cable section does not exceed the supported wiring capacitance. Supply decoupling, grounding, and the separation between controller-side and cable-side nets should follow the manufacturer datasheet guidance. Bus rise time and timing margins should be measured at the farthest node rather than inferred only from cable length.
This product page consolidates the verified manufacturer function, package, voltage, frequency, capacitance, timing, and pricing information while distinguishing pin-compatible family alternatives. It also adds application-specific engineering guidance, comparison parameters, and replacement considerations that are not presented as a single block in the distributor listings.
ドロップイン代替品: P82B715DRG4 — 同一パッケージでピン互換。PCBの作り直しが必要な異なるパッケージの部品は除外されています。
このシリーズのバリエーション
同一シリーズでドロップイン互換のモデル: P82B715DRG4 （同一形状・フットプリント） — 相違点: Package, Bus Type, Architecture.
P82B715DR
✅ ドロップイン価格はお問い合わせください
データシートを見る →P82B715D
✅ ドロップイン価格はお問い合わせください
データシートを見る →P82B715TD,112
✅ ドロップイン📋 参考代替品（カタログ未掲載）
P82B715TD-T
✅ ドロップイン📋 参考代替品（カタログ未掲載）
P82B715DG4
✅ ドロップイン価格はお問い合わせください
データシートを見る →P82B715DRG4 仕様
| Product Type | 2-bit bidirectional I2C/SMBus buffer and cable extender |
| Number of Buffered Channels | 2 bits |
| 動作電源電圧 | 3 V to 12 V |
| Maximum I2C Bus Frequency | 400 kHz |
| Practical Bus Wiring Capacitance | 3 nF |
| Propagation Delay | 250 ns |
| 電源電流 | 22 mA |
| Logic Type | I2C logic |
| Bus Type | I2C and SMBus |
| Data Transfer Direction | Bidirectional |
| Amplification Method | Unidirectional analog current amplification |
| パッケージ | 8-SOIC |
| ピン数 | 8 pins |
| 実装タイプ | Surface mount |
P82B715DRG4 8-soic ピン配置ガイド
P82B715DRG4 (8-soic パッケージ) のピン配置。 ピン番号、機能、接続図はメーカーのデータシートで定義されています。正確なフットプリントとはんだ付けのガイドラインについては、データシートを参照してください。
詳細なピン配置データはありません: P82B715DRG4.
詳細は データシート をご参照ください。
主な用途
P82B715DRG4 の用途: 6 件s: Long-Distance Industrial Sensor Bus, SMBus Equipment Extension, Building Automation Sensor Networks, Embedded Data-Acquisition Modules, Actuator and Control-Net Extension, Industrial Gateway Backplane.
Long-Distance Industrial Sensor Bus
The P82B715DRG4 fits industrial sensor networks when cable capacitance prevents a conventional I2C controller from driving the remote branch reliably. Its 2-bit bidirectional architecture supports separate clock and data paths, while the verified 3-nF practical wiring-capacitance capability provides more installation margin than the standard 400-pF bus limit. The 3 V to 12 V operating range accommodates common industrial interface supply levels. Place the extender between the controller-side Sx/Sy nets and the cable-side Lx/Ly nets, then select pull-ups for the actual load and verify rise time at the farthest sensor.
おすすめ
SMBus Equipment Extension
P82B715DRG4 can extend an SMBus-derived connection by buffering the clock and data conductors without adding a second protocol controller. Its bidirectional 2-bit design supports normal host-to-target communication while the current-amplifying cable side handles the current needed by a high-capacitance branch. The verified 400-kHz limit is appropriate for many management buses operating below the maximum standard rate, and the 3 V to 12 V supply range allows deployment in mixed-voltage embedded equipment. Designers should still validate timing, pull-up topology, bus idle levels, and system-specific SMBus timeout behavior.
おすすめ
Building Automation Sensor Networks
The P82B715DRG4 is suitable for building-automation controller boards that must serve sensors across multiple cable branches. Two buffered channels maintain the clock and data relationship while allowing the remote branch to operate beyond the normal 400-pF I2C wiring limit. The P82B715's 3-nF practical wiring-capacitance target allows engineers to evaluate longer or more complex field wiring, while 400-kHz operation supports common building-automation traffic rates. A robust design should include surge protection at exposed cable interfaces, verify conductor length against measured capacitance, and ensure the 3 V to 12 V operating range suits the controller board.
おすすめ
Embedded Data-Acquisition Modules
P82B715DRG4 can extend an I2C connection between a data-acquisition controller and remote analog or digital sensor modules. The device's two independent bidirectional channels separate the controller-side nets from the cable side, and its current amplification helps the remote branch overcome the voltage drop associated with long wiring. Operation remains capped at 400 kHz, so it is appropriate for sensor systems whose sampling and conversion architecture does not require faster bus rates. Confirm that total cable capacitance stays within the supported practical limit and that sensor rise and fall times satisfy the system timing budget.
おすすめ
Actuator and Control-Net Extension
The P82B715DRG4 can bridge a controller to a remote group of actuators when the wiring is too capacitive for an unbuffered I2C branch. Its 2-bit bidirectional configuration allows command traffic to move toward the remote nodes and status information to return without separate one-way buffers. The 3-nF practical wiring-capacitance capability is the primary benefit over a standard 400-pF I2C node, while the 250-ns reported delay must be included in worst-case control-loop timing. Use suitable pull-up values, minimize stub branches, and validate actuator settling behavior under the maximum specified bus loading.
おすすめ
Industrial Gateway Backplane
P82B715DRG4 is applicable in industrial gateways that need to connect an embedded host to a field-wired I2C daughterboard. The buffer creates a controlled cable-side segment with increased current-drive capability and a practical 3-nF wiring-capacitance target, while its 3 V to 12 V range permits use across common embedded supply domains. The 400-kHz maximum keeps the interface compatible with standard I2C peripherals. Designers should reserve space for local decoupling, maintain a low-impedance ground reference, protect externally accessible conductors from transients, and confirm the exact operating-temperature grade of the ordered suffix.
おすすめ
おすすめ製品の概要
エンジニアリング参考データ: P82B715DRG4 — 比較、設計ガイダンス、コンプライアンス情報。
選定ガイド
代替品との比較
| パラメータ | この製品 | P82B715DR | P82B715D | P82B715TD,112 | P82B715TD-T | P82B715DG4 |
|---|---|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Package | 8-SOIC | 8-SOIC | 8-SOIC | 8-SOIC | 8-SOIC | 8-SOIC |
| Function | 2-bit bidirectional I2C/SMBus buffer and cable extender | P82B715 I2C redriver family | P82B715 I2C bus extender family | P82B715 I2C bus extender family | P82B715 I2C bus extender family | P82B715 I2C bus extender family |
| Operating Supply Voltage | 3 V to 12 V | 3 V to 12 V at family level | 3 V to 12 V at family level | 3 V to 12 V at family level | 3 V to 12 V at family level | 3 V to 12 V at family level |
| Maximum Bus Frequency | 400 kHz | 400 kHz at family level | 400 kHz at family level | 400 kHz at family level | 400 kHz at family level | 400 kHz at family level |
| Practical Wiring Capacitance | 3 nF | 3 nF at family level | 3 nF at family level | 3 nF at family level | 3 nF at family level | 3 nF at family level |
| Bidirectional Channels | 2 bits | 2 bits at family level | 2 bits at family level | 2 bits at family level | 2 bits at family level | 2 bits at family level |
主な差別化要因
- Higher practical cable-capacitance capability （vs Standard 400-pF I2C bus node)
- Bidirectional clock-and-data extension （vs One-way digital buffer)
- Standards-oriented bus operation （vs General-purpose I/O expander)
設計ノート
Treat the 3-nF value as a practical family capability, not a guarantee that every 3-nF wiring configuration will retain clean 400-kHz timing. Measure clock and data rise times at the farthest remote node with the production cable, connectors, pull-ups, peripheral loading, and P82B715 in place. Keep clock and data routing geometry consistent, minimize stubs, and avoid long unprotected branches that create unequal propagation delays between the two conductors.
Separate the controller-side Sx/Sy nets from the cable-side Lx/Ly nets exactly as shown in the manufacturer application guidance; they are not interchangeable electrical nodes. Place local supply decoupling at the P82B715 and provide a low-impedance ground return close to the device. Route the external cable away from switching nodes and sensitive analog signals, and provide the transient protection required by the installation environment rather than relying on the extender for surge-energy handling.
Do not select an alternative solely because its ordering suffix resembles P82B715DRG4. Compare the manufacturer ordering table for pin configuration, temperature grade, reel or tape format, qualification, and lifecycle status. The verified excerpts do not expose every suffix field, so interchangeability must be confirmed for the specific order code. Likewise, ensure that the host controller, pull-ups, peripheral clock stretching, and cable topology remain compatible with the 400-kHz maximum.
コンプライアンス情報
The supplied verified data does not provide explicit RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals declarations. The DRG4 order suffix is associated with tape-and-reel ordering but is not used here as proof of any compliance status.
