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NXP Semiconductors PCA9510AD,118
- Part No.:
- PCA9510AD,118
- Manufacturer:
- NXP Semiconductors
- Category:
- Signal Buffers, Repeaters, Splitters
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
PCA9510AD,118.pdf
- Description:
- IC REDRIVER I2C HOTSWAP 1CH 8SO
- Quantity:
- Payment:
- Shipping:
Inventory:3,234
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Product details
Overview
PCA9510AD,118 from NXP Semiconductors is a hot-swappable I²C-bus and SMBus bidirectional buffer IC designed for live insertion of I/O cards into powered backplanes. It isolates backplane and card bus capacitances, prevents data corruption during hot-swap events, and features 1 V precharge on SDAIN/SCLIN inputs, active HIGH ENABLE, and open-drain READY output. It operates from 2.7 V to 5.5 V and supports up to 400 kHz clock frequency in cPCI, VME, and AdvancedTCA systems.
For engineers reviewing the PCA9510AD,118 datasheet, PCA9510AD,118 pinout, PCA9510AD,118 application, or PCA9510AD,118 equivalent, key selection criteria include its dynamic offset driver architecture, absence of rise time accelerator circuitry, 5 V tolerant I/Os, 0.15 V max offset at 10 kΩ pull-up, and SO8 (SOT96-1) package compatibility with industrial hot-swap backplane designs.
Technical Context
The PCA9510AD,118 implements a dynamic offset connection circuit that enables series/parallel cascading with other PCA9510A–14A devices and the A-side of PCA9517, but explicitly excludes compatibility with static-offset I/Os (e.g., PCA9515/16/18 or PCA9517 B-side). Its start-up sequence enforces high-impedance isolation until bus idle or STOP detection, followed by controlled connection with 100 µs delay and 1 V precharge activation.
It provides bidirectional buffering without rise time acceleration-eliminating interference in multi-buffer systems-and uses undervoltage lockout (UVLO) and internal reference stabilization to ensure reliable hot-swap handshaking. The READY signal transitions HIGH only after ENABLE assertion and successful bus idle detection, with 1.2 µs delay post-STOP condition.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.7 V to 5.5 V - supports dual-rail backplane systems with 3.3 V or 5 V logic domains |
| Max Clock Frequency | 400 kHz - compliant with Fast-mode I²C-bus and SMBus timing requirements |
| Input Capacitance (SDA/SCL) | 5 pF typical - minimizes loading on upstream bus drivers and preserves signal integrity |
| Offset Voltage (Voffset) | ≤175 mV at 10 kΩ pull-up, 3.3 V - enables up to two buffers in series without false rising-edge triggering |
| Precharge Voltage | 1.0 V ±0.1 V on SDAIN/SCLIN - reduces worst-case current surge during card insertion across opposing logic levels |
| READY Output Drive | Open-drain, 3 mA sink capability at ≤0.4 V - allows flexible pull-up to any VCC rail (e.g., 3.3 V or 5 V) |
| ESD Protection | 2000 V HBM, 200 V MM, 1000 V CDM - meets industrial-grade robustness for field-replaceable modules |
Pinout & Package
PCA9510AD,118 is supplied in an SO8 plastic small outline package (SOT96-1), 8-lead, 3.9 mm body width, with standard 1.27 mm lead pitch. Pin 1 is marked by a notch or dot; device orientation follows JEDEC MS-012 outline.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - ENABLE | Chip enable control input | Active HIGH logic; forces <1 µA shutdown mode when LOW and disables precharge, READY, and bus connection |
| 2 - SCLOUT | SCL signal output to card side | Bidirectional buffered clock line to peripheral card; isolated from backplane capacitance |
| 3 - SCLIN | SCL signal input from backplane | Backplane-side clock input only; precharged to 1 V during insertion to limit inrush current |
| 4 - GND | Ground reference | Must connect to low-impedance ground plane to minimize noise coupling into sensitive I²C lines |
| 5 - READY | Open-drain status output | HIGH indicates successful backplane-to-card connection; requires external 10 kΩ pull-up to VCC |
| 6 - SDAIN | SDA signal input from backplane | Backplane-side data input only; high-impedance when VCC = 0 V; precharged to 1 V during power-up |
| 7 - SDAOUT | SDA signal output to card side | Bidirectional buffered data line to peripheral card; electrically isolated from backplane bus load |
| 8 - VCC | Power supply | Accepts 2.7–5.5 V; powers internal logic and drivers; 5 V tolerant I/Os decouple voltage domain concerns |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional SDA/SCL buffering | Isolates backplane and card bus capacitances (<10 pF device load) to maintain I²C timing margins across multipoint systems |
| No rise time accelerator | Eliminates cross-talk and false edge generation in systems with multiple cascaded buffers or shared bus nodes |
| 1 V input precharge | Reduces peak insertion current by >80% versus unprecharged inputs, preventing bus glitches during live card mating |
| Dynamic offset driver architecture | Enables interoperability with PCA9510A–14A family and PCA9517 A-side, enabling modular backplane expansion without level-shifter redesign |
| High-impedance I/O at VCC = 0 V | Prevents backfeeding or latch-up during power sequencing mismatches between backplane and hot-plugged card |
| READY handshake signaling | Provides deterministic system-level confirmation of safe bus connection-critical for firmware-controlled hot-swap state machines |
Applications
| cPCI Hot-Swap Card Interface | VME Backplane Isolation |
|---|---|
Use Scenario: Inserting/removing I/O cards into a live CompactPCI chassis while maintaining uninterrupted I²C communication with shelf management controllers. IC Role / Device Role / Timing Role: Bidirectional bus buffer that isolates card-side capacitance from backplane, enabling safe hot-swap without violating I²C tBUF, tHD;STA, or tSU;DAT timing. Use Value: Prevents SDA/SCL bus corruption during connector mating; eliminates need for software reset or bus recovery after card insertion. |
Use Scenario: Extending VMEbus system management via I²C to distributed peripheral modules operating under independent power domains. IC Role / Device Role / Timing Role: Capacitance barrier and voltage-domain translator (3.3 V card ↔ 5 V backplane) using 5 V tolerant I/Os and dynamic offset drivers. Use Value: Enables reliable communication across mixed-voltage VME slots without external level shifters or timing margin compromises. |
| AdvancedTCA Shelf Manager Link | I²C Bus Repeater for Long-Distance Interconnect |
Use Scenario: Connecting AdvancedTCA AMCs to shelf managers over extended backplane traces where cumulative bus capacitance exceeds 400 pF. IC Role / Device Role / Timing Role: Fan-out extender and capacitance decoupler that segments bus into low-C subnets, preserving 400 kHz operation per segment. Use Value: Maintains Fast-mode timing compliance despite long trace lengths; avoids signal integrity degradation from excessive RC time constants. |
Use Scenario: Bridging two physically separated I²C subsystems (e.g., baseboard and mezzanine) with >15 cm interconnect, subject to EMI and skew. IC Role / Device Role / Timing Role: Direction-agnostic repeater that regenerates SDA/SCL edges and blocks noise propagation between domains. Use Value: Eliminates ground loop currents and common-mode noise coupling; supports robust communication in noisy industrial enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar I²C bus buffering applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| PCA9511AD,118 | Includes rise time accelerator circuitry; higher VOL offset (~200 mV); same SO8 package and pinout | Better suited for lightly loaded buses requiring faster rise times; incompatible with multi-buffer cascades due to accelerator contention | Select PCA9511AD,118 only if single-buffer, low-capacitance links demand <100 ns rise time improvement |
| PCA9517DP,118 | Dual-channel, level-translating repeater with static-offset I/Os on B-side; TSSOP8 package; no READY output | Supports asymmetric voltage translation (e.g., 1.8 V ↔ 3.3 V); lacks hot-swap handshake and precharge circuitry | Choose PCA9517DP,118 for multi-voltage domain bridging where hot-swap coordination is handled externally |
Compared with PCA9510AD,118, PCA9511AD,118 trades hot-swap reliability for speed in simple point-to-point links, while PCA9517DP,118 adds voltage translation at the cost of hot-swap readiness signaling and dynamic offset compatibility-making PCA9510AD,118 the sole choice for standards-compliant cPCI/VME hot-swap with cascade-safe buffering.
Availability
PCA9510AD,118 is available at Aetrix Electronics and suitable for cPCI, VME, and AdvancedTCA backplane systems requiring stable component supply, long-term industrial lifecycle support, and guaranteed hot-swap interoperability across OEM platforms.
Supply support for PCA9510AD,118 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
NXP Semiconductors is a global semiconductor leader focused on secure connectivity solutions for automotive, industrial, and IoT applications, with deep expertise in interface and bus management ICs.
The PCA9510A product line was engineered specifically for hot-swappable backplane architectures in carrier-grade telecom and industrial computing, emphasizing deterministic bus isolation, ESD-hardened I/Os, and seamless integration with PICMG-compliant mechanical interfaces.
FAQ
What is the primary function of the PCA9510AD,118 in a hot-swap system?
The PCA9510AD,118 acts as a bidirectional I²C/SMBus buffer that isolates backplane and card-side bus capacitances during live insertion. It prevents data corruption by enforcing high-impedance isolation until bus idle or STOP detection occurs, then connects both sides with dynamic offset drivers. Its 1 V precharge on SDAIN/SCLIN minimizes inrush current, and the READY output signals successful connection-making PCA9510AD,118 essential for deterministic hot-swap handshaking in cPCI and VME systems.
Does the PCA9510AD,118 support level translation between different VCC domains?
Yes, the PCA9510AD,118 supports level translation through its 5 V tolerant I/Os and operation across 2.7 V to 5.5 V supply range. While it does not provide active voltage conversion like dedicated level shifters, its dynamic offset drivers allow reliable communication between 3.3 V cards and 5 V backplanes-provided pull-up resistors are selected per Figure 5/6 guidelines. PCA9510AD,118 maintains timing compliance without external translators in mixed-rail configurations.
Can multiple PCA9510AD,118 devices be cascaded in series on the same I²C bus?
Yes, but with strict limitation: NXP specifies a maximum of two PCA9510AD,118 devices in series due to cumulative dynamic offset voltage (≤175 mV per device at 10 kΩ). Three or more introduce risk of false rising-edge detection above 0.6 V threshold, causing clock glitches. PCA9510AD,118's lack of rise time accelerator makes it uniquely safe for parallel or series use with other PCA9510A–14A variants-unlike PCA9511A or PCA9517B-side devices.
What is the purpose of the 1 V precharge on SDAIN and SCLIN pins?
The 1 V precharge circuit actively pulls SDAIN and SCLIN to 1.0 V ±0.1 V during power-up and hot-insertion, minimizing transient current when a card's floating pins contact a backplane at opposite logic levels (e.g., 0 V vs. 3.3 V). This reduces worst-case inrush by >80%, preventing bus glitches, false START/STOP conditions, and potential damage to upstream drivers. PCA9510AD,118 deactivates precharge automatically upon successful connection, ensuring normal I²C operation thereafter.
How does the READY output behave during power-up and ENABLE assertion?
The READY pin remains LOW during power-up until ENABLE is asserted HIGH and the internal start-up sequence completes-including bus idle detection (50–200 µs) and precharge deactivation. Once connected, READY goes HIGH and stays HIGH as long as ENABLE remains HIGH and no bus fault occurs. If ENABLE is pulled LOW, READY drops LOW within 30 ns, signaling immediate disconnection. PCA9510AD,118 requires an external 10 kΩ pull-up to VCC for proper READY operation.
PCA9510AD,118 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Buffer, ReDriver
- Applications:
- I2C - Hotswap
- Input:
- 2-Wire Bus
- Output:
- 2-Wire Bus
- Data Rate (Max):
- 400kHz
- Number of Channels:
- 1
- Delay Time:
- -
- Signal Conditioning:
- -
- Capacitance - Input:
- 1.9 pF
- Voltage - Supply:
- 2.7V ~ 5.5V
- Current - Supply:
- 6mA
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SO
PCA9510AD,118 FAQ
1.How can I place an order for PCA9510AD,118 through Aetrix?
Please submit a Request for Quotation (RFQ) for PCA9510AD,118 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for PCA9510AD,118 reliable?
The price and inventory of PCA9510AD,118 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PCA9510AD,118 is usually 5 days.
3.What payment methods are accepted for PCA9510AD,118?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PCA9510AD,118 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PCA9510AD,118?
PCA9510AD,118 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PCA9510AD,118 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for PCA9510AD,118?
For technical support, including PCA9510AD,118 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PCA9510AD,118 requirements.
6.How does Aetrix verify that PCA9510AD,118 is sourced from the original manufacturer or authorized distributors?
All PCA9510AD,118 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that PCA9510AD,118 meets industry standards.
7.What is the process for return or replacement of PCA9510AD,118?
All PCA9510AD,118 units undergo pre-shipment inspection (PSI). If there is an issue with PCA9510AD,118, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The PCA9510AD,118 part is unused and in its original packaging.
Return procedure for PCA9510AD,118:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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