PCA9600DPZ - Dual I2C Bus Buffer 1MHz Fm+ | NXP
部品番号: PCA9600DPZ ✓ 生産中| 数量 | 単価 | 小計 |
|---|---|---|
| 1 | $1.62 | $1.62 |
| 10 | $1.46 | $14.60 |
| 100 | $1.21 | $121.00 |
| 500 | $0.99 | $495.00 |
| 1,000 | $0.84 | $840.00 |
PCA9600DPZ 概要
A bus buffer is a type of interface IC that sits between two segments of a serial bus, electrically isolating them while passing data bidirectionally. In the I2C signal-chain hierarchy (I2C-bus buffer -> bus repeater/extender -> interface IC -> mixed-signal communication device), the buffer's role is to decouple the capacitance and voltage levels of one bus segment from another so that the total system can exceed the limits of a single I2C segment.
Key features include non-latching bidirectional logic translation, support for different voltage levels on either side, capacitance isolation up to 4000 pF for long cable or long trace applications, and operation to at least 1 MHz, a roughly 2.5x speed improvement over the earlier P82B96. The device provides a higher-speed drop-in concept for designs already using P82B96-style buffering.
Architecturally, the PCA9600 uses open-drain bidirectional buffer stages that detect input low levels and actively drive the opposite side lower, without direction pins or latch-up states. This ensures that a master sees a clean ACK and that multi-point operation with multiple buffers is possible without protocol modification.
Typical applications include driving I2C over long cables in industrial equipment, multipoint I2C backplanes with many slave devices, and level-shifting between a 3.3V controller bus and higher-voltage peripheral buses.
A key design consideration: each buffer segment adds a small offset to the logic low level, so verify that every slave in the chain meets the input low voltage (VIL) requirement of the buffered level.
This page synthesizes distributor availability, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
ドロップイン代替品: PCA9600DPZ — 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: PCA9600DPZ （同一形状・フットプリント） — 相違点: Function, Number of Channels.
クイック比較ツール — 並列比較する代替部品を選択:
PCA9601DP,118
✅ ドロップイン📋 参考代替品（カタログ未掲載）
P82B96DP,118
✅ ドロップイン✓ 在庫あり
$1.24 / 個
データシートを見る →PCA9600DP
✅ ドロップイン📋 参考代替品（カタログ未掲載）
PCA9600DPZ 仕様
| 機能 | Dual bidirectional I2C-bus buffer |
| Max Data Rate | 1 MHz (at least) |
| Bus Capacitance Drive | Up to 4000 pF |
| Fast-mode Plus (Fm+) Compatibility | Yes (high drive side) |
| Bidirectional Operation | Yes, non-latching |
| Direction Pin Required | No |
| Predecessor | P82B96 (higher-speed version) |
| Number of Channels | 2 (SDA and SCL) |
| パッケージ | TSSOP-8 (DP) |
| 実装タイプ | Surface Mount |
| Applications | Point-to-point and multipoint I2C bus extension |
PCA9600DPZ tssop-8 (dp) ピン配置ガイド
PCA9600DPZ (tssop-8 (dp) 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: PCA9600DPZ.
詳細は データシート をご参照ください。
主な用途
PCA9600DPZ の用途: 6 件s: Long-Distance I2C Cable Extension, Multipoint I2C Backplanes, I2C Level Shifting Between Voltage Domains, Industrial Sensor Networks over I2C, P82B96 Speed Upgrade Retrofit, Server and Storage Management Buses.
Long-Distance I2C Cable Extension
The PCA9600DPZ is purpose-built for driving I2C over long cable runs where the standard 400 pF single-segment capacitance limit would be violated by tens or hundreds of times. Its buffer stages isolate the controller-side capacitance from the cable, and the high-drive output can sink a 4000 pF segment while maintaining valid logic levels at 1 MHz, per NXP datasheet specifications. In a typical point-to-point link, one PCA9600 at the controller end and one at the remote end converts the cable into a separate bus segment with its own pull-up sizing. Because the buffer is non-latching and direction-free, no handshake or MCU intervention is needed, preserving full I2C protocol compatibility including clock stretching and multi-master arbitration across the link.
おすすめ
Multipoint I2C Backplanes
In card-cage and backplane systems, each inserted card contributes capacitance that would quickly exhaust a raw I2C bus. The PCA9600DPZ solves this by placing a buffer on each card so the shared trunk sees only the buffer inputs, while each card's local bus - often carrying several devices - forms its own isolated segment up to 4000 pF. NXP documents multipoint operation in the datasheet, and because the device is non-latching with no direction pin, cards can be added or removed without bus reconfiguration. Designers should follow the datasheet's multipoint wiring guidelines to ensure only one buffer drives the trunk low at a time. The 1 MHz capability also supports Fm+ backplanes where higher throughput is needed for dense sensor or EEPROM arrays.
おすすめ
I2C Level Shifting Between Voltage Domains
The PCA9600 creates a bidirectional logic interface between a normal I2C-bus and bus segments operating at different voltage levels, per NXP product information. This makes it suitable for bridging a 3.3 V controller domain to peripheral buses powered at higher or mixed voltages, a common requirement in industrial systems combining legacy 5 V devices with modern low-voltage MCUs. Because translation is open-drain and passive on the low level, there is no direction-control latency, so arbitration and clock stretching work transparently across the domain boundary. Engineers should verify the VIL offset introduced by the buffer against every slave's input threshold, sizing pull-up resistors per the datasheet application circuits so both domains meet their timing budgets at the target speed up to 1 MHz.
おすすめ
Industrial Sensor Networks over I2C
Factory floor installations frequently place temperature, pressure, and humidity sensors meters away from the controller, making the PCA9600's 4000 pF drive capability a direct match for the resulting cable capacitance. A buffered star or daisy-chain topology using one PCA9600DPZ per segment lets an industrial controller address dozens of remote sensors while each drop contributes negligible capacitance to the trunk. The device's 1 MHz support allows faster polling cycles than standard-mode designs, reducing scan latency in monitoring loops. The TSSOP-8 package fits the small PCB area typically available on sensor breakout boards, and the non-latching buffer behavior ensures that a powered-down sensor card does not corrupt the shared trunk - a frequent pitfall in unbuffered industrial I2C networks.
おすすめ
P82B96 Speed Upgrade Retrofit
Designs already built around the P82B96 buffer that need more bus bandwidth - for example video-latency-sensitive systems or dense EEPROM arrays - can migrate to the PCA9600, which NXP identifies as the higher-speed version of the P82B96 with Fast-mode Plus (Fm+) capability to at least 1 MHz. Because both parts share the same buffering concept and 8-pin TSSOP footprint class, the upgrade path typically requires only verifying the pinout mapping and re-checking pull-up resistor values for the higher slew rates at 1 MHz. The PCA9600 maintains the same non-latching, bidirectional, direction-free behavior, so firmware and higher-layer protocol code require no changes. Designers should confirm maximum speed requirements fall within the PCA9600's rated operating envelope per the NXP datasheet.
おすすめ
Server and Storage Management Buses
Server chassis use I2C for power-supply monitoring, fan control, EEPROM SPD data, and hot-swap controller access across long, heavily loaded backplanes - an environment where the PCA9600's 4000 pF isolation and 1 MHz Fm+ throughput directly address both capacitance and bandwidth limits. Each management plane can be segmented with PCA9600 buffers so a fault or a hot-inserted blade does not drag the entire management bus down, while the non-latching architecture guarantees recovery once the offending segment is released. The TSSOP-8 footprint suits high-density baseboard layouts, and the wide speed range lets a single buffer design serve both 100 kHz legacy sensors and 1 MHz Fm+ devices, simplifying bill-of-materials and sparing strategy across platforms.
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: PCA9600DPZ — 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 | PCA9601DP,118 | P82B96DP,118 | PCA9600DP |
|---|---|---|---|---|
| Package | TSSOP-8 (DP) | TSSOP-8 (DP) - same | TSSOP-8 (DP) - same | TSSOP-8 (DP) - same |
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Max Data Rate | 1 MHz (Fm+) | 1 MHz (Fm+) | ~400 kHz class | 1 MHz (Fm+) |
| Output Enable / Bus Isolation | No (always active) | Yes | No | No |
| Direction Pin Required | No (non-latching, bidirectional) | No | No | No |
| Positioning | Higher-speed version of P82B96 | Enable-equipped PCA9600 | Original predecessor device | Identical device, alternate ordering code |
| Lifecycle Status | Active | Active | Active | Active |
主な差別化要因
- Fm+ speed capability to 1 MHz （vs P82B96DP,118)
- Always-on simplicity （vs PCA9601DP,118)
- 4000 pF capacitance isolation （vs TCA9517DR)
設計ノート
Place the PCA9600DPZ close to the segment connector so the high-drive side directly drives the long or high-capacitance bus, keeping the sensitive logic side on a short, quiet trace to the controller. Size pull-up resistors independently for each segment: the cable side needs stronger pull-ups (lower resistance) to meet rise-time requirements at 1 MHz with up to 4000 pF, per the NXP datasheet application circuits, while the controller side can use standard values.
Each buffer stage introduces a small voltage offset on the logic low level of the opposite side. In daisy-chained or multipoint topologies with multiple buffers in series, these offsets stack - verify that the total low level still meets every slave's VIL specification, or reduce the number of series buffer stages. This is the most common failure mode in cascaded I2C buffer designs and is explicitly addressed in NXP's application guidance for buffered buses.
Decouple VCC with a 100 nF ceramic capacitor placed within a few millimeters of the supply pin, and provide a solid ground return. Estimated: at 1 MHz with strong pull-downs on a 4000 pF segment, transient sink currents can reach tens of milliamps per channel, so a local charge reservoir prevents ground bounce that could falsely trigger the buffer's input-low detectors. Avoid sharing the buffer ground with high-current switching loads.
コンプライアンス情報
The Z suffix in PCA9600DPZ indicates NXP's lead-free/RoHS-compliant finish per NXP ordering-code convention. Formal REACH, halogen-free, and conflict-minerals declarations should be requested from NXP as material declaration sheets.
