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NXP Semiconductors PCA9513AD,118
- Part No.:
- PCA9513AD,118
- Manufacturer:
- NXP Semiconductors
- Category:
- Signal Buffers, Repeaters, Splitters
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
PCA9513AD,118.pdf
- Description:
- IC BUFFER I2C/SMBUS HOTSWAP 8SO
- Quantity:
- Payment:
- Shipping:
Inventory:2,509
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Product details
Overview
PCA9513AD,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, incorporates a 92 µA current source on SCLIN/SDAIN, features 0.8 V rise time accelerator threshold, and operates across 2.7 V to 5.5 V supply voltage - enabling reliable cPCI/VME/AdvancedTCA system expansion.
For engineers reviewing the PCA9513AD,118 datasheet, PCA9513AD,118 pinout, PCA9513AD,118 application, or PCA9513AD,118 equivalent, key selection criteria include its 400 kHz clock support, ENABLE-controlled low-current mode (<16 µA), READY open-drain status flag, SO8 package compatibility, and PICMG-compliant current-source pull-up architecture.
Technical Context
The PCA9513AD,118 implements dynamic offset I/O drivers with slew-rate detection and stop/idle bus monitoring to prevent contention during hot-swap events. Its connection logic waits for bus idle or STOP condition before enabling bidirectional buffering between SCLIN↔SCLOUT and SDAIN↔SDAOUT.
Rise time acceleration activates at 0.8 V on both SDA and SCL lines using a 2 mA transient current source, requiring matched VCC and bus pull-up voltage. The 92 µA DC current source on SCLIN/SDAIN (PCA9513A-specific) replaces external pull-ups and maintains stable RC timing across card insertion/removal cycles.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 2.7 V to 5.5 V - supports mixed-voltage backplane systems including 3.3 V and 5 V domains |
| Max Clock Frequency | 400 kHz - fully compatible with I²C Fast Mode and SMBus specifications |
| Rise Time Accelerator Threshold | 0.8 V - provides improved noise margin versus 0.6 V threshold in earlier PCA9511A |
| SCLIN/SDAIN Current Source | 92 µA (typical) - eliminates need for external pull-up resistors in PICMG backplane applications |
| ENABLE Input Logic | Active HIGH - enables device and initiates initialization; LOW forces <16 µA shutdown mode |
| READY Output Type | Open-drain - signals connection status (HIGH = backplane/card linked; requires external 10 kΩ pull-up) |
| ESD Protection | 2000 V HBM - meets JESD22-A114 for robust handling in manufacturing and field service |
Pinout & Package
PCA9513AD,118 is supplied in an SO8 (SOT96-1) plastic small outline package, 8-lead, 3.9 mm body width, with standard gull-wing lead form for surface-mount assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: ENABLE | Chip enable control input | Active HIGH logic signal; asserts initialization and enables buffering; LOW disables all functions and forces READY LOW |
| 2: SCLOUT | Serial clock output to card side | Bidirectional SCL line driver/receiver connected to card-side I²C bus |
| 3: SCLIN | Serial clock input from backplane side | Bidirectional SCL line driver/receiver connected to backplane-side I²C bus; includes 92 µA current source |
| 4: GND | Ground reference | Primary return path for all internal circuitry; must connect to low-impedance ground plane |
| 5: READY | Open-drain status output | Indicates connection state: HIGH = SCLIN/SDAIN linked to SCLOUT/SDAOUT; requires external 10 kΩ pull-up to VCC |
| 6: SDAIN | Serial data input from backplane side | Bidirectional SDA line driver/receiver connected to backplane-side I²C bus; includes 92 µA current source |
| 7: SDAOUT | Serial data output to card side | Bidirectional SDA line driver/receiver connected to card-side I²C bus |
| 8: VCC | Power supply input | Supplies operating power (2.7–5.5 V); also defines rise time accelerator reference and pull-up voltage level |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional SDA/SCL buffering | Isolates backplane and card bus capacitances to maintain signal integrity during hot-swap events |
| 92 µA integrated current source | Replaces external pull-up resistors on SCLIN/SDAIN, ensuring consistent rise time across variable card loading |
| 0.8 V rise time accelerator threshold | Increases noise immunity over legacy 0.6 V designs, reducing false triggering in electrically noisy backplanes |
| READY open-drain status indicator | Provides deterministic hardware handshake for system firmware to verify safe bus connection prior to I²C transaction |
| Dynamic offset I/O architecture | Enables series/parallel cascading with other PCA951xA devices while preventing interoperability with static-offset parts (e.g., PCA9515/16) |
Applications
| cPCI Hot-Swap Card Interface | VME Backplane Expansion |
|---|---|
Use Scenario: Inserting or removing peripheral I/O cards into a live CompactPCI chassis without disrupting master controller communication. IC Role / Device Role / Timing Role: Bidirectional I²C buffer that isolates card-side capacitance from backplane, enabling safe hot-swap via STOP/idle detection and READY signaling. Use Value: Eliminates bus corruption risk during card insertion/removal; 92 µA current source ensures stable rise time regardless of card count. | Use Scenario: Adding sensor or FPGA-based modules to an operational VMEbus system while maintaining uninterrupted system management bus operation. IC Role / Device Role / Timing Role: Hot-swap-capable I²C repeater that decouples backplane timing load from individual card loads using dynamic offset drivers. Use Value: Enables modular system upgrades without power cycling; 0.8 V rise time threshold improves reliability in high-noise industrial environments. |
| AdvancedTCA Shelf Management | PICMG 2.11 Backplane Monitoring |
Use Scenario: Interfacing shelf manager controllers with hot-pluggable AdvancedTCA blades for FRU identification and health telemetry. IC Role / Device Role / Timing Role: Isolating blade-side I²C sensors from shelf manager bus using ENABLE-gated buffering and READY status confirmation. Use Value: Guarantees deterministic connection timing (≤200 µs bus idle wait) and prevents arbitration loss during blade insertion. | Use Scenario: Implementing distributed I²C monitoring across multiple slots in a PICMG 2.11-compliant telecom backplane with varying card configurations. IC Role / Device Role / Timing Role: Providing consistent 92 µA pull-up on SCLIN/SDAIN to eliminate resistor tolerance drift and ensure repeatable rise time across all slots. Use Value: Maintains I²C timing compliance (tLOW ≥1.3 µs, tr ≤300 ns) despite variable card capacitance and connector aging. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar I²C bus buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| PCA9514AD,118 | No 92 µA current source on SCLIN/SDAIN; otherwise identical pinout, timing, and rise time accelerator (0.8 V) | Used where external pull-ups are preferred or required; lacks PICMG-specific current-source optimization | Select PCA9514AD,118 when design uses discrete pull-up resistors and does not require integrated current sourcing. |
| PCA9517DP,118 | Includes level-shifting capability (A-side 1.8–5.5 V, B-side 2.7–5.5 V); different pinout and no READY output | Supports voltage translation between disparate I²C domains; not hot-swap optimized for backplane insertion | Choose PCA9517DP,118 only when bidirectional level translation is required and READY status signaling is unnecessary. |
Compared with PCA9514AD,118, the PCA9513AD,118 delivers guaranteed current-source pull-up for PICMG systems; versus PCA9517DP,118, it offers dedicated hot-swap control and READY feedback but no level shifting - making it optimal for same-voltage backplane expansion.
Availability
PCA9513AD,118 is available at Aetrix Electronics and suitable for cPCI, VME, and AdvancedTCA system integration requiring stable component supply, long-term lifecycle support, and verified hot-swap performance under industrial temperature conditions.
Supply support for PCA9513AD,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 system management ICs.
The PCA9513A product line was engineered specifically for hot-swappable I²C/SMBus backplane architectures in carrier-grade telecom and industrial computing systems, emphasizing bus isolation, noise resilience, and deterministic startup behavior.
FAQ
What is the primary function of the PCA9513AD,118 in a backplane system?
The PCA9513AD,118 serves as a hot-swappable I²C-bus and SMBus buffer that isolates backplane and card-side capacitances during live insertion or removal. It prevents bus corruption by enforcing connection only after STOP or bus idle detection, and provides bidirectional buffering with 92 µA current-source pull-ups on SCLIN and SDAIN. This ensures reliable communication in cPCI, VME, and AdvancedTCA systems without requiring system power-down.
Does the PCA9513AD,118 support I²C Fast Mode operation?
Yes, the PCA9513AD,118 supports clock frequencies up to 400 kHz, fully complying with I²C Fast Mode and SMBus standards. Its propagation delays (tPLH ≤20 ns, tPHL ≤80 ns) and rise time accelerator circuitry - activated at 0.8 V with 2 mA transient current - ensure timing compliance even under high-capacitance conditions typical in multi-card backplanes.
How does the READY pin on the PCA9513AD,118 indicate bus connection status?
The READY pin on the PCA9513AD,118 is an open-drain output that goes HIGH when the backplane (SCLIN/SDAIN) and card (SCLOUT/SDAOUT) sides are successfully connected, and LOW when disconnected or during ENABLE assertion delay. It requires an external 10 kΩ pull-up to VCC and provides firmware-visible confirmation that the hot-swap sequence has completed and I²C transactions may safely begin.
Can the PCA9513AD,118 be used with different supply voltages on the backplane and card sides?
No - the PCA9513AD,118 requires the bus pull-up voltage and VCC to be identical, as its rise time accelerator circuitry depends on matching references. Unlike the PCA9517, it does not provide level-shifting functionality. For disparate voltage domains, designers must use external level shifters or select alternatives like PCA9517DP,118, which explicitly supports dual-voltage operation.
What is the purpose of the 92 µA current source on SCLIN and SDAIN pins of the PCA9513AD,118?
The 92 µA current source on SCLIN and SDAIN of the PCA9513AD,118 replaces external pull-up resistors in PICMG-compliant backplane applications. It ensures consistent RC time constants during card insertion/removal, eliminates resistor tolerance drift, and maintains rise time compliance across variable bus loading - directly addressing a key challenge in modular telecom and industrial computing systems.
PCA9513AD,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, Accelerator
- 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:
- 3.5mA
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SO
PCA9513AD,118 FAQ
1.How can I place an order for PCA9513AD,118 through Aetrix?
Please submit a Request for Quotation (RFQ) for PCA9513AD,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 PCA9513AD,118 reliable?
The price and inventory of PCA9513AD,118 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PCA9513AD,118 is usually 5 days.
3.What payment methods are accepted for PCA9513AD,118?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PCA9513AD,118 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PCA9513AD,118?
PCA9513AD,118 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PCA9513AD,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 PCA9513AD,118?
For technical support, including PCA9513AD,118 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PCA9513AD,118 requirements.
6.How does Aetrix verify that PCA9513AD,118 is sourced from the original manufacturer or authorized distributors?
All PCA9513AD,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 PCA9513AD,118 meets industry standards.
7.What is the process for return or replacement of PCA9513AD,118?
All PCA9513AD,118 units undergo pre-shipment inspection (PSI). If there is an issue with PCA9513AD,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 PCA9513AD,118 part is unused and in its original packaging.
Return procedure for PCA9513AD,118:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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