P82B715DR - 2-Bit I2C Bus Extender | Texas Instruments
部品番号: P82B715DR ✓ 生産中| 数量 | 単価 | 小計 |
|---|---|---|
| 1 | $0.7587 | $0.76 |
| 10 | $0.7587 | $7.59 |
| 100 | $0.7587 | $75.87 |
| 500 | $0.7587 | $379.35 |
| 1,000 | $0.7587 | $758.70 |
P82B715DR 概要
An I2C bus extender is a specialized interface IC that preserves bidirectional open-drain bus signaling while placing controlled current amplification between a main bus and a remote segment. The P82B715 provides two buffered channels for SDA and SCL, allowing a controller or peripheral bank to communicate over a longer cable or higher-capacitance wiring. In the system hierarchy, it is an I2C/SMBus interface buffer within interface ICs and semiconductor signal-conditioning products.
Key features include a 3 V to 12 V operating supply range, 400 kHz operation, bidirectional data transfer, support for 3 nF bus capacitance, and compatibility with TTL-level drivers. The verified product description identifies the P82B715 family as a bipolar IC using unidirectional analog current amplification. Its main engineering benefit is stronger bus-current drive, although the extender does not provide galvanic isolation and does not eliminate the need to control cable and connector parasitics.
The P82B715DR is suitable for industrial control, long inter-card wiring, instrumentation, and systems where SDA or SCL must reach a remote connector. The buffered architecture helps maintain logic levels under capacitive loading, but designers should still minimize stub branches, use appropriate pull-up placement, and verify rise-time requirements at the lowest intended bus rate. The 8-SOIC package also supports conventional surface-mount assembly and easy comparison with the non-reel P82B715D ordering option.
A key design consideration is that both sides of the device are connected to open-drain buses and require pull-up resistors selected for the actual bus voltage, load, and target rise time. Do not treat the extender as a level shifter when the two bus sections operate at different voltage domains; verify pull-up values and device limits from the manufacturer datasheet before mixing supply domains.
This page combines verified manufacturer and distributor information with application guidance, commercial search answers, and honest replacement analysis. Pricing and availability are presented as of 2026-10-23 where the supplied data provides a price or inventory indication.
ドロップイン代替品: P82B715DR — 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: P82B715DR （同一形状・フットプリント） — 相違点: Architecture, Package.
クイック比較ツール — 並列比較する代替部品を選択:
P82B715D
✅ ドロップイン✓ 在庫あり
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）
P82B715DR 仕様
| Product Type | 2-bit bidirectional I2C/SMBus buffer and cable extender |
| Operating Supply Voltage Range | 3 V to 12 V |
| Maximum Bus Frequency | 400 kHz |
| Bidirectional Channels | 2 channels |
| Bus Wiring Capacitance | 3 nF |
| Main-Bus Capacitance | 400 pF conventional I2C specification limit |
| 電源電流 | 22 mA |
| Delay Time | 250 ns |
| 入力容量 | 3000 pF |
| パッケージ | 8-SOIC, 0.154 inch body width, 3.90 mm width |
| 実装タイプ | Surface mount |
| 動作温度 | -40 C to +85 C |
| Architecture | Bipolar IC with unidirectional analog current amplification |
| Driver Compatibility | Compatible with TTL-level drivers |
| ESD Robustness | +/-2500 V HBM |
| Latch-Up Immunity | Greater than 100 mA |
| RoHS ステータス | Compliant |
| MSL | MSL Level-1-260C-UNLIM |
P82B715DR 8-soic, 0.154 inch body width, 3.90 mm width ピン配置ガイド
P82B715DR (8-soic, 0.154 inch body width, 3.90 mm width 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: P82B715DR.
詳細は データシート をご参照ください。
主な用途
P82B715DR の用途: 6 件s: Long-Distance Industrial I2C, Remote Sensor and Actuator Bus, HDMI DDC and Consumer Electronics, Instrumentation and Test Equipment, Embedded Controller Expansion, Communications and Distributed Control.
Long-Distance Industrial I2C
The P82B715DR fits industrial systems where an I2C cable carries enough capacitance to slow edges or prevent reliable communication. Its two bidirectional channels and verified 400 kHz maximum rate support extending the bus, while the 3 nF wiring-capacitance capability gives the design more margin than the conventional 400 pF limit. Place the extender between the controller-side bus and the remote device side, provide appropriate pull-ups on both sections, and keep the remote cable as short and well terminated as practical. The device improves sink-current capability but does not provide galvanic isolation, so ground differences and common-mode transients must be handled elsewhere.
おすすめ
Remote Sensor and Actuator Bus
The P82B715DR is useful when multiple remote sensors or actuators share an I2C cable with substantial connector and wiring capacitance. Its verified 3 V to 12 V supply range and bidirectional operation allow the remote bus section to retain open-drain behavior while the extender increases available sink current. Use the SDA and SCL channels together, maintain pull-ups on the correct bus segments, and check the 400 kHz limit against the cable’s rise time. Because the device is not isolated, long installations may still need surge protection, grounding controls, and a separate isolation strategy if the remote equipment can present an independent ground potential.
おすすめ
HDMI DDC and Consumer Electronics
The P82B715DR can support I2C-compatible display-control links such as HDMI DDC when cable capacitance makes the unbuffered connection unreliable. The two bidirectional channels match the SDA/SCL nature of DDC, and the verified 400 kHz ceiling is appropriate for many control-only buses. The design must still honor the display’s voltage levels, timing expectations, connector pinout, and pull-up placement. Because the P82B715DR is a cable extender rather than a protocol translator, it does not change DDC addressing or resolve incompatible voltage domains. Confirm the exact HDMI implementation and connector grounding before deploying it.
おすすめ
Instrumentation and Test Equipment
The P82B715DR is suitable for instrumentation modules connected through I2C when a front panel, daughterboard, or external fixture adds capacitance. Its verified 3 V to 12 V operating range supports common low-voltage instrument rails, and the bidirectional channels allow a controller to read and write remote devices without converting the bus into a one-way link. The 250 ns listed delay is a useful timing reference, but the design must evaluate total bus delay, pull-up resistance, and the required rise time rather than relying only on nominal frequency. Keep the extender close to the cable boundary and provide local decoupling according to the manufacturer guidance.
おすすめ
Embedded Controller Expansion
The P82B715DR can extend an embedded controller’s I2C reach to a daughterboard or compact sensor module where cable length and connector loading are the limiting factors. The verified 400 kHz maximum rate and 3 nF wiring-capacitance target make it a practical choice for low- and moderate-speed control buses. The controller and peripheral still determine the electrical protocol, while the extender improves current drive only. Use short escape traces, minimize long stubs, place pull-ups where the system timing analysis requires, and test startup, repeated bus transfers, and fault recovery across the full cable length.
おすすめ
Communications and Distributed Control
The P82B715DR is appropriate for distributed control equipment that routes I2C over an internal harness rather than a high-speed board-level bus. Its two bidirectional channels preserve SDA and SCL transfer, and the 3 nF wiring-capacitance capability can reduce the need for repeaters in moderately loaded harnesses. The device does not create a new communication protocol and does not isolate ground loops, so system integrators should use it only when both sides share a compatible voltage reference and the bus timing remains below 400 kHz. Add ESD protection and controlled pull-ups at harness boundaries when cables leave an enclosure.
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: P82B715DR — 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 | P82B715D | P82B715TD,112 |
|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments |
| Package | 8-SOIC | 8-pin device; package details require confirmation | SOIC-8 |
| Product Type | 2-bit bidirectional I2C/SMBus buffer/cable extender | P82B715 series interface device | P82B715 series I2C logic buffer |
主な差別化要因
- Higher verified bus-wiring capacitance target （vs P82B715D)
- Explicit 3 V to 12 V operating range （vs P82B715TD,112)
- Same-family 8-SOIC replacement path （vs P82B715TD,112)
設計ノート
Treat both sides of the P82B715DR as open-drain I2C/SMBus segments. Place pull-ups on the intended bus sections, keep their resistance consistent with the 3 V to 12 V supply and the target 400 kHz maximum rate, and verify the worst-case rise time with the complete cable and connector load. The verified 3 nF wiring-capacitance figure is a capability claim, not permission to add unlimited cable or stubs.
Keep the P82B715DR close to the boundary between the local bus and the remote cable. Route SDA and SCL as a controlled pair, minimize stub branches, keep the ground return close to the conductors, and place local supply bypassing at the device. A compact placement reduces the unbuffered segment length and helps preserve edge quality at the 400 kHz limit.
Do not assume the P82B715DR is a voltage-level translator or galvanic isolator. Its verified function is bidirectional current amplification for I2C/SMBus capacitance extension. Confirm that both bus sections share a compatible voltage reference, that pull-up values satisfy the sink-current and rise-time limits, and that cable faults or independent grounds will not create unsafe conditions.
The supplied data identifies a 22 mA supply current but does not provide a complete power-dissipation table for this package. Use that value as a design input only and calculate actual dissipation from the measured supply voltage and current under the worst operating condition. Check the manufacturer thermal and absolute-maximum limits before placing the part in a high-temperature enclosure or adjacent to high-power circuitry.
コンプライアンス情報
The supplied PartGenie result states RoHS and Green compliance, while the supplied product information does not establish REACH, halogen-free, conflict-minerals, or AEC-Q100 status. MSL Level-1-260C-UNLIM is reported by the supplied alternative-finder result.
