PCA9510ADP,118 - Hot-Swap I2C/SMBus Buffer | NXP Semiconductors
部品番号: PCA9510ADP,118 ✓ 生産中| 数量 | 単価 | 小計 |
|---|---|---|
| 1 | $0 | $0.00 |
| 10 | $0 | $0.00 |
| 100 | $0 | $0.00 |
| 500 | $0 | $0.00 |
| 1,000 | $0 | $0.00 |
PCA9510ADP,118 概要
An I2C bus buffer (also called a bus repeater or redriver) is a two-wire interface IC that sits between an I2C or SMBus controller segment and a downstream segment. Within the interface IC hierarchy - serial interface ICs to buffers/repeaters to logic ICs - its role is to isolate bus capacitance, extend the number of devices or cable length a bus can drive, and protect one segment from faults or transients on the other.
The defining feature of the PCA9510A is its hot-swap control circuitry. During card insertion, contact bounce and partial power-up can corrupt SDA and SCL lines; the PCA9510A keeps the backplane side disconnected until a stop command or bus idle condition occurs on the backplane without bus contention on the card side. Only then does it make the bidirectional connection, preserving data integrity on the live backplane.
Technically, the buffer provides bidirectional buffering with rise-time acceleration on the output sides, allowing larger bus capacitance than a raw I2C port can tolerate. It supports both the standard I2C-bus and the SMBus (System Management Bus) protocol and operates from a single supply, making it a drop-in isolation element between a backplane and a removable I/O card.
Typical applications include live-insertion I/O cards in telecom and server backplanes, CompactPCI-style shelves, SMBus segments in power supplies and battery-backed systems, and any hot-pluggable module that must not disturb an operating two-wire bus during insertion or removal.
Design consideration: keep the two bus segments physically separated on the PCB and provide adequate pull-up resistors sized for each segment's capacitance; the buffer does not eliminate the need for correct pull-up values on either side.
This page synthesizes distributor pricing context, drop-in family alternatives, and practical design notes not found in the manufacturer datasheet, with all electrical data traced to the NXP PCA9510A product data sheet (Rev. 01, 8 September 2005).
ドロップイン代替品: PCA9510ADP,118 — 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: PCA9510ADP,118 （同一形状・フットプリント） — 相違点: Function, Package.
クイック比較ツール — 並列比較する代替部品を選択:
PCA9511ADP,118
✅ ドロップイン ⚠️ 仕様未検証📋 参考代替品（カタログ未掲載）
PCA9512ADP,118
✅ ドロップイン ⚠️ 仕様未検証📋 参考代替品（カタログ未掲載）
PCA9513ADP,118
✅ ドロップイン ⚠️ 仕様未検証📋 参考代替品（カタログ未掲載）
PCA9514ADP,118
✅ ドロップイン ⚠️ 仕様未検証📋 参考代替品（カタログ未掲載）
PCA9510AD,112
✅ ドロップイン ⚠️ 仕様未検証📋 参考代替品（カタログ未掲載）
PCA9510ADP,118 仕様
| 機能 | Hot swappable I2C-bus and SMBus bus buffer |
| チャネル数 | 1 buffered channel (SDA + SCL bidirectional) |
| Protocol Support | I2C-bus, SMBus |
| Maximum Operating Frequency | 400 kHz |
| パッケージ | 8-TSSOP (SOP) |
| 実装タイプ | Surface Mount |
| Hot-Swap Protection | Yes - connection deferred until stop command or bus idle without card-side bus contention |
| Rise-Time Accelerator | Yes, on output sides |
| RoHS ステータス | Compliant (DP,118 suffix indicates lead-free/RoHS ordering code) |
| Type | Buffer, ReDriver |
| ライフサイクル状態 | Active (per NXP product page) |
PCA9510ADP,118 8-tssop (sop) ピン配置ガイド
PCA9510ADP,118 (8-tssop (sop) 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: PCA9510ADP,118.
詳細は データシート をご参照ください。
主な用途
PCA9510ADP,118 の用途: 6 件s: Live-Insertion I/O Cards for Telecom Backplanes, SMBus Power-Supply Management in Servers, Hot-Pluggable Storage and RAID Modules, Industrial Chassis and PLC Backplane Management, Battery-Backed Systems and Baseboard Management, CompactPCI and Modular Instrumentation Shelves.
Live-Insertion I/O Cards for Telecom Backplanes
Telecom and server shelves allow operators to insert or remove I/O cards while the backplane remains powered. During insertion, staggered contact engagement and supply ramp-up produce partial logic states and bus contention that would corrupt an unprotected I2C bus. The PCA9510A addresses this directly: its control circuitry keeps the backplane segment disconnected until a stop command or bus idle occurs on the backplane without bus contention on the card, then makes the bidirectional connection. Once connected, the buffer isolates card-side bus capacitance from the backplane and applies rise-time acceleration at up to 400 kHz, so a heavily loaded card bus does not degrade backplane signal integrity.
おすすめ
SMBus Power-Supply Management in Servers
Server and telecom power supplies expose an SMBus interface for telemetry, PMBus-style monitoring, and margining control. Hot-swappable PSU modules must not glitch the shared management bus during insertion. The PCA9510A buffers the module-side SMBus from the shelf management bus with autonomous idle-detect hot-swap connection, supporting both SMBus and 400 kHz Fast-mode I2C. Because the buffer segment isolates capacitance and faults, multiple PSU modules can share one shelf SMBus segment while each module's local bus loading stays within spec. Place 10 kohm-range pull-ups per segment sized to that segment's capacitance; the buffer enables per-segment optimization rather than a compromised single pull-up.
おすすめ
Hot-Pluggable Storage and RAID Modules
Drive backplanes and RAID enclosure management boards use I2C/SMBus to read EEPROMs, temperature sensors, and SES firmware from removable storage trays. A tray inserted into a live enclosure can present a half-powered bus that stalls the segment with a stuck-low SDA. The PCA9510A prevents this: it defers connection until the card side is contention-free and the backplane is idle, and it isolates the two segments thereafter so a fault on a tray cannot hold down the enclosure bus. With 400 kHz support, the buffer does not slow typical enclosure polling traffic. Designers should ensure the tray-side pull-ups are present before the buffer connects, since the accelerator assists edges only on the driven side.
おすすめ
Industrial Chassis and PLC Backplane Management
Industrial controllers use an internal I2C/SMBus for chassis management - power modules, fan trays, and slot identifiers. Hot insertion of expansion modules is common during maintenance without full system shutdown. The PCA9510A provides the required live-insertion protection at 400 kHz with autonomous connection control, so the management master never sees the insertion transient. Buffering also solves the cumulative-capacitance problem: each slot's local bus (sensors plus EEPROM plus GPIO expander) is isolated, allowing more devices per chassis than a single raw I2C port could drive. Routing tip: keep the buffered segments short and provide test points on both sides for bus debugging with an I2C analyzer.
おすすめ
Battery-Backed Systems and Baseboard Management
Battery backup units and baseboard management controllers (BMCs) poll smart-battery and environmental data over SMBus segments that remain energized when boards are serviced. The PCA9510A's hot-swap buffering protects the live management bus from insertion glitches on battery or sensor boards, and its SMBus compatibility matches the smart-battery specification ecosystem. Because the buffer re-drives the bus with rise-time acceleration, long daisy-chained battery strings or front-panel thermal sensor runs can exceed the capacitance a bare I2C master would tolerate. Keep total segment capacitance within the value the accelerator is designed for and verify ACK timing at 100 kHz SMBus rates during system qualification.
おすすめ
CompactPCI and Modular Instrumentation Shelves
Modular instrumentation based on CompactPCI-style architectures requires peripherals that survive insertion into a running chassis. Instrument front-end cards carry I2C-controlled attenuators, ADC configuration ports, and calibration EEPROMs, all hanging off the shelf management bus. The PCA9510A isolates each card's I2C segment and defers backplane connection until the bus is idle and contention-free - the exact behavior such architectures specify for live insertion. Its single 8-TSSOP footprint per buffered channel keeps the card-edge area compact, and 400 kHz operation preserves configuration download speed during card boot. Designers should confirm the card-side supply is stable before the buffer connects by checking the idle-detect window in the NXP datasheet timing section.
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: PCA9510ADP,118 — 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 | PCA9511ADP,118 | PCA9512ADP,118 | PCA9513ADP,118 | PCA9514ADP,118 |
|---|---|---|---|---|---|
| Package | 8-TSSOP (SOP) | 8-TSSOP - same | 8-TSSOP - same | 8-TSSOP (SOP) - same | 8-TSSOP (SOP) - same |
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Function | Hot-swappable I2C/SMBus buffer | Hot-swappable I2C/SMBus buffer + ENABLE | Hot-swappable I2C/SMBus buffer (variant control) | Hot-swappable I2C/SMBus buffer (SOP variant) | Hot-swappable I2C/SMBus buffer (SOP + enable) |
| Maximum Bus Speed | 400 kHz | 400 kHz | 400 kHz | 400 kHz | 400 kHz |
| Channels | 1 (SDA + SCL) | 1 (SDA + SCL) | 1 (SDA + SCL) | 1 (SDA + SCL) | 1 (SDA + SCL) |
| Hot-Swap Connection Control | Autonomous - waits for backplane stop/idle without card contention | Hot-swap + external ENABLE gating | Hot-swap control (variant) | Hot-swap control (variant) | Hot-swap control (variant) |
| RoHS Ordering Code | PCA9510ADP,118 (compliant) | PCA9511ADP,118 (compliant) | PCA9512ADP,118 (compliant) | PCA9513ADP,118 (compliant) | PCA9514ADP,118 (compliant) |
主な差別化要因
- Fully autonomous hot-swap connection control （vs PCA9511ADP,118)
- Lowest-complexity live-insertion solution in the family （vs PCA9514ADP,118)
- Dual-protocol I2C and SMBus support at 400 kHz （vs generic discrete-transistor bus isolation)
設計ノート
Treat the PCA9510A as a true bus partition: route the card-side SDA/SCL only on the removable card and the backplane-side traces only on the shelf, meeting only at the buffer. Each segment needs its own pull-up resistors sized to that segment's capacitance - a shared or omitted pull-up defeats the capacitance isolation the buffer provides. Keep the two sides physically separated on the layout to prevent coupled transients during hot insertion, and place the buffer close to the card-edge connector to minimize the unbuffered stub length.
The PCA9510A connects autonomously after detecting backplane stop/idle without card-side contention - it does not wait for your card's power to be fully good unless you guarantee that in hardware. If the card supply ramps slowly enough that the card-side bus floats after connection, add an RC delay or choose the PCA9511A variant whose ENABLE pin can be driven from a power-good supervisor. Also remember rise-time accelerators dynamically pull up edges: excessive static pull-down loading or very long cables can confuse idle detection, so qualify with your actual bus topology.
Estimated: verify card-side and backplane-side supply sequencing against the datasheet power-up requirements before production. During hot insertion the card supply rises while the backplane is already active; ensure local decoupling (100 nF ceramic directly at the buffer VCC pin) so the buffer's internal reference and accelerator circuits remain stable through the supply ramp. Do not share a single decoupling network across both bus segments' bypassing needs, and confirm the supply tolerance range from the NXP datasheet absolute maximums table for your rail voltage.
The PCA9510A's rise-time accelerator speeds up rising edges to permit larger bus capacitance, but accelerated edges on long cables can ring. If your backplane segment exceeds roughly 200-400 pF of effective capacitance (many cards plus cable), simulate or measure edge quality; consider splitting the bus with an additional repeater such as TCA9517 instead of one long accelerated segment. Maintain pull-up ratios per NXP application guidance so the accelerator disengages correctly at the static high level and does not cause a stuck-high condition.
コンプライアンス情報
The DP,118 ordering code per NXP convention indicates RoHS-compliant, lead-free packaging. REACH, halogen-free, and conflict-minerals status not stated in the provided data - verify on the NXP product page or material declaration report.
