P82B715DRG4 - 2-Bit 3-12V I2C Bus Extender | Texas Instruments
MPN： P82B715DRG4 ✓ 啟用中P82B715DRG4 概覽
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.
直接替換替代品，適用於 P82B715DRG4 — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： P82B715DRG4 （相同外形與佔位） — 差異在於 Package, Bus Type, Architecture.
P82B715DR
✅ 直接替換聯絡詢價
查看資料表 →P82B715D
✅ 直接替換聯絡詢價
查看資料表 →P82B715TD,112
✅ 直接替換📋 參考替代品（不在目錄中）
P82B715TD-T
✅ 直接替換📋 參考替代品（不在目錄中）
P82B715DG4
✅ 直接替換聯絡詢價
查看資料表 →P82B715DRG4 規格
| Product Type | 2-bit bidirectional I2C/SMBus buffer and cable extender |
| Number of Buffered Channels | 2 bits |
| 工作電源電壓 | 3 V to 12 V |
| Maximum I2C Bus Frequency | 400 kHz |
| Practical Bus Wiring Capacitance | 3 nF |
| Propagation Delay | 250 ns |
| 供應電流 | 22 mA |
| Logic Type | I2C logic |
| Bus Type | I2C and SMBus |
| Data Transfer Direction | Bidirectional |
| Amplification Method | Unidirectional analog current amplification |
| 封裝 | 8-SOIC |
| 腳位數 | 8 pins |
| 安裝類型 | Surface mount |
P82B715DRG4 8-soic 腳位配置指南
P82B715DRG4（8-soic 封裝）的腳位配置。 腳位編號、功能與連接圖定義於製造商資料手冊中。請參閱該手冊以取得確切的封裝尺寸與焊接指引。
無詳細腳位定義資料： P82B715DRG4.
請參閱 資料表 以查看完整腳位配置。
典型應用
P82B715DRG4 適用於 6 應用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.
推薦
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.
推薦
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.
推薦
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.
推薦
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.
推薦
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.
推薦
推薦產品摘要
工程參考資料，適用於 P82B715DRG4 — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | 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 |
主要差異化特點
- Higher practical cable-capacitance capability (對比Standard 400-pF I2C bus node)
- Bidirectional clock-and-data extension (對比One-way digital buffer)
- Standards-oriented bus operation (對比General-purpose I/O expander)
設計說明
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.
合規資訊
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.
