P82B715DR - 2-Bit I2C Bus Extender | Texas Instruments
料号： P82B715DR ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 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 概述
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.
直接替换替代料： P82B715DR ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： P82B715DR （相同外形与封装尺寸） ——差异在于 Architecture, Package.
快速对比工具——选择替代料号进行并排对比：
P82B715D
✅ 直接替换✓ 有现货
联系询价
查看数据手册 →P82B715TD,112
✅ 直接替换📋 参考替代料（不在目录中）
P82B715DR 规格参数
| 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 |
| 电源电流 | 22 mA |
| Delay Time | 250 ns |
| 输入电容 | 3000 pF |
| 封装 | 8-SOIC, 0.154 inch body width, 3.90 mm width |
| 安装类型 | Surface mount |
| 工作温度 | -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 状态 | Compliant |
| MSL | MSL Level-1-260C-UNLIM |
P82B715DR 8-soic, 0.154 inch body width, 3.90 mm width 引脚配置指南
P82B715DR（8-soic, 0.154 inch body width, 3.90 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： P82B715DR.
请参阅 数据手册 以查看完整引脚配置。
典型应用
P82B715DR 适用于 6 应用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.
推荐
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.
推荐
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.
推荐
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.
推荐
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.
推荐
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.
推荐
推荐产品汇总
工程参考数据： P82B715DR ——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 | 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 |
关键差异点
- Higher verified bus-wiring capacitance target （对比 P82B715D)
- Explicit 3 V to 12 V operating range （对比 P82B715TD,112)
- Same-family 8-SOIC replacement path （对比 P82B715TD,112)
设计说明
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.
合规信息
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.
