P82B96TD/S911 - 2-15V 400kHz I2C Bus Buffer | NXP
Teilenummer: P82B96TD/S911 ✓ AktivP82B96TD/S911 Übersicht
An I2C bus buffer is a specialized interface integrated circuit that separates two bus segments while allowing clock and data information to pass in either direction. The P82B96 belongs to the hierarchy of bidirectional bus buffers, logic-level translators, interface ICs, and power-management components designed for robust digital interconnect. Unlike a unidirectional level translator, its non-latching architecture supports two-wire communication in both directions and allows connected devices to recognize bus states across the interface.
The principal electrical features include a 2 V to 15 V operating range, a 400 kHz maximum I2C operating frequency, and support for interfaces involving 3.3 V logic, low-current SMBus signaling, and logic levels up to 15 V. The buffered architecture reduces the loading imposed on the upstream bus while providing separate side connections for compatible downstream devices. Its bipolar IC construction is identified directly in the manufacturer documentation.
The device is designed to bridge buses that differ in voltage and current requirements rather than merely repeating identical logic levels. NXP identifies examples including 350 µA SMBus signaling, 3.3 V logic devices, and 15 V-level or low-impedance lines. The non-latching behavior is important because it preserves the electrical interpretation of bus signals without introducing a held state when the interface is inactive.
Typical uses include I2C bus extension, SMBus isolation, level translation between legacy and modern logic domains, and protection of controller pins from capacitive loading. It can also simplify PCB partitioning by placing the buffer between two bus segments and reducing the distance over which a single segment must operate. The 8-pin SO package supports compact surface-mount layouts in industrial, communications, and embedded equipment.
A key design consideration is that buffered sections do not automatically remove every bus-compliance issue. Engineers should verify pull-up values, bus capacitance, rise-time requirements, enable polarity, reference-voltage configuration, and the voltage applied to each side against the manufacturer datasheet. Grounding and trace routing should also keep the buffered bus away from noisy power converters to prevent false start or data corruption.
This page combines the manufacturer part information, exact verified package and operating details, ordering references, and practical guidance for selecting and implementing the P82B96TD/S911. It also identifies the verified same-footprint options while clearly separating them from general functional equivalents that have not been confirmed as pin-compatible drop-ins.
Drop-in-Alternativen für P82B96TD/S911 – gleiches Gehäuse, Pin-kompatibel. Bauteile mit anderem Gehäuse, die eine PCB-Überarbeitung erfordern, sind ausgeschlossen.
Varianten dieser Serie
Modelle derselben Serie, die drop-in-kompatibel sind mit P82B96TD/S911 (gleiche Bauform und Footprint) – abweichend in Package, Device Type.
P82B96TD/118
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
P82B96DR
✅ Drop-InPreis auf Anfrage
Datenblatt ansehen →P82B96D
✅ Drop-InPreis auf Anfrage
Datenblatt ansehen →P82B96DRG4
✅ Drop-InPreis auf Anfrage
Datenblatt ansehen →P82B96TD
✅ Drop-InPreis auf Anfrage
Datenblatt ansehen →P82B96TD/S911 Technische Daten
| Device Type | Dual bidirectional bus buffer |
| Bus Type | I2C and SMBus |
| Architecture | Non-latching bidirectional logic interface |
| Semiconductor Technology | Bipolar IC |
| Signal Voltage Range | 2 V to 15 V |
| Maximum I2C Bus Frequency | 400 kHz |
| Number of Buffered Bus Channels | 2 channels |
| Direction Control | Bidirectional |
| Supported Logic Levels | 3.3 V, 15 V, 350 µA SMBus, and low-impedance lines |
| Gehäuse | 8-pin SO surface-mount package |
| Montageart | Surface mount |
| Shipping Format | Tape and reel |
| Manufacturer Product Status | Active |
P82B96TD/S911 8-pin so surface-mount package Pinbelegungsleitfaden
Pinbelegung für P82B96TD/S911 (8-pin so surface-mount package-Gehäuse). Pin-Nummerierung, Funktionen und Anschlussdiagramme sind im Herstellerdatenblatt definiert. Entnehmen Sie diesem den genauen Footprint und Lötrichtlinien.
Keine detaillierten Pinbelegungsdaten verfügbar für P82B96TD/S911.
Siehe die Datenblatt für die vollständige Pin-Konfiguration.
Typische Anwendungen
P82B96TD/S911 ist geeignet für 6 Anwendungs: I2C Bus Extension, SMBus Segmentation, I2C Voltage-Level Translation, Embedded Controller Bus Isolation, Communications Equipment Bus Conditioning, Legacy Peripheral Interface.
I2C Bus Extension
The P82B96TD/S911 fits an I2C bus-extension design because it provides two buffered, bidirectional signal paths with a verified maximum operating frequency of 400 kHz. Placing the device between a controller and a remote device separates the two segments electrically, reducing the capacitive burden presented to the original bus. NXP describes the P82B96 as a non-latching interface for buses with different voltage and current levels. Designers should still select pull-ups from the calculated bus capacitance and target rise time because the 400 kHz rating does not determine a unique resistor value. The 8-pin SO package also allows the buffer to sit near a board edge or cable connector, shortening the less controlled segment while preserving a conventional surface-mount assembly.
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SMBus Segmentation
The P82B96TD/S911 can be used to segment an SMBus path where the controller and target devices operate with different loading requirements. Its non-latching bidirectional behavior is appropriate for clock-and-data interfaces, and the verified 2 V to 15 V signal range covers several logic environments. NXP specifically identifies 350 µA SMBus signaling among the bus configurations supported by the P82B96. In a practical design, the buffered section should retain the correct pull-up voltage and capacitance for the devices it serves. Engineers must check whether the SMBus host requires clock stretching across the buffer and should verify the exact enable and reference behavior in the manufacturer datasheet before finalizing the topology.
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I2C Voltage-Level Translation
The P82B96TD/S911 is applicable when an I2C system separates 3.3 V logic from a bus segment operating at a different logic or current level. NXP explicitly lists 3.3 V devices and 15 V-level or low-impedance lines among the supported examples, while the verified operating span is 2 V to 15 V. Unlike a one-direction unidirectional translator, the P82B96 provides bidirectional communication for both clock and data. The implementation must preserve the intended logic levels on each side through suitable pull-ups and configuration. Because an I2C translator can fail if a side is unintentionally powered or enabled, review the device-control pins, power sequencing, and bus leakage limits in the official NXP documentation before layout release.
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Embedded Controller Bus Isolation
The P82B96TD/S911 can isolate an embedded controller's I2C pins from a longer or more heavily populated peripheral bus. Its dual buffered channels provide separate logic-side and bus-side connectivity, and the 400 kHz limit covers the verified operating range associated with the P82B96 family. Isolation here means separating bus loading and logic domains rather than providing galvanic isolation. The board should keep the upstream and downstream pull-up networks distinct and route the two sides so that ground-current paths do not disturb the buffered signals. For battery-powered or mixed-voltage systems, verify disabled-state behavior and supply sequencing from the datasheet. The 8-pin SO footprint is compact enough for placement between a processor and a connector-based peripheral section.
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Communications Equipment Bus Conditioning
The P82B96TD/S911 suits communications equipment that needs to isolate an I2C management bus from a lower-impedance peripheral segment. The verified 2 V to 15 V range, 400 kHz operating rate, and bidirectional non-latching interface allow the same device to bridge controller logic and a cable-connected subsystem. In rack or line-card equipment, the buffer can be located near the connector to prevent peripheral capacitance from loading the central controller directly. Maintain short return paths and separate sensitive clock traces from switching nodes to reduce coupled noise. The presence of a buffer does not replace correct pull-up design, so calculate each side independently for its voltage, capacitance, sink current, and required rise time before production release.
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Legacy Peripheral Interface
The P82B96TD/S911 can connect a modern controller to a legacy I2C peripheral section whose logic voltage or sink-current requirements differ from those of the controller. NXP describes the device as an interface between a normal I2C bus and similar buses with different voltage and current levels, which directly addresses this migration case. The dual bidirectional architecture preserves clock and data behavior in both directions while separating the bus loads. Designers should confirm that each side's pull-up voltage remains within the allowed range and that no peripheral pulls a bus line beyond the translated logic threshold. The active 400 kHz maximum provides compatibility with standard-mode and fast-mode I2C scheduling, subject to total bus capacitance and signal-integrity verification.
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Zusammenfassung der empfohlenen Produkte
Technische Referenzdaten für P82B96TD/S911 – Vergleich, Designhinweise und Compliance-Informationen.
Auswahlhilfe
Vergleich mit Alternativen
| Parameter | Dieses Produkt | P82B96TD/118 | P82B96DR | P82B96D | P82B96DRG4 | P82B96 |
|---|---|---|---|---|---|---|
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | Texas Instruments |
| Package | 8-pin SO | 8-pin SO - same | 8-pin SO - same | 8-pin SO - same | 8-pin SO - same | 8-pin SO - same |
| Function | Dual bidirectional bus buffer | Dual bidirectional bus buffer | Dual bidirectional bus buffer | Dual bidirectional bus buffer | Dual bidirectional bus buffer | 2-bit bidirectional I2C/SMBus buffer |
| Signal Voltage Range | 2 V to 15 V | 2 V to 15 V | 2 V to 15 V | 2 V to 15 V | 2 V to 15 V | 2 V to 15 V |
| Maximum Bus Frequency | 400 kHz | 400 kHz | 400 kHz | 400 kHz | 400 kHz | 400 kHz |
| Architecture | Non-latching bidirectional logic interface | Non-latching bidirectional logic interface | Non-latching bidirectional logic interface | Non-latching bidirectional logic interface | Non-latching bidirectional logic interface | Bidirectional I2C/SMBus buffer |
| Special Feature | Interfaces buses with different voltage and current levels | I2C bus buffer and cable extender | I2C bus buffer | I2C bus buffer | I2C bus buffer | I2C/SMBus buffer and cable extender |
Wichtigste Unterscheidungsmerkmale
- Direct NXP family sourcing with the same P82B96 interface function (vs. PCA9600)
- Same-footprint NXP ordering option (vs. P82B96DR)
- Verified matching core specifications from another manufacturer (vs. P82B96)
Designhinweise
Place the P82B96TD/S911 close to the bus segment that requires buffering or level translation, especially when that segment reaches a connector or cable. Keep the two pull-up networks separate, route the clock and data traces as a compact pair, and avoid long stubs. Although the device supports a verified 400 kHz operating frequency, actual signal rise time still depends on total bus capacitance and pull-up resistance, so perform rise-time validation with the production load configuration.
Calculate each buffered section independently for pull-up resistance, sink current, bus capacitance, and logic voltage. The 400 kHz rating does not determine a universal resistor value, and the same pull-up network should not automatically be reused on both sides of a level translation. Confirm that the connected devices can sink the required current and that the resulting rise time satisfies the fastest I2C operating mode used by the system.
Do not treat generic I2C buffer equivalents as automatic PCB replacements. PCA9600, TCA9517, and LTC4311 appeared in the verified cross-reference search, but the excerpts did not confirm identical pin assignments or enable/reference behavior. A replacement should be accepted only after its package, numbered pins, control logic, voltage limits, timing, and disabled-state behavior have been compared with the NXP P82B96 datasheet.
Keep the buffered I2C traces away from switching nodes, inductors, and high-current return paths, and provide a continuous ground reference under the signal route. Connect pull-up resistors near the devices that actively sink bus current rather than placing them automatically at the controller. Review the power and ground pins against the manufacturer pinout and recommended application circuit because the verified search excerpts do not expose the numbered pin assignments.
Compliance-Informationen
The verified NXP excerpts identify the product as active but do not state RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals status. Compliance must be confirmed for the exact ordering code through current NXP documentation.
