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NXP Semiconductors PCA9513ADP,118
- Part No.:
- PCA9513ADP,118
- Manufacturer:
- NXP Semiconductors
- Category:
- Signal Buffers, Repeaters, Splitters
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
PCA9513ADP,118.pdf
- Description:
- IC ACCELERATR I2C HOTSWAP 8TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:11,474
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Product details
Overview
PCA9513ADP,118 from NXP Semiconductors is a hot-swappable I²C-bus and SMBus buffer IC designed for backplane-to-card isolation in live-insertion systems. It provides bidirectional SDA/SCL buffering with 92 µA integrated current sources on SDAIN/SCLIN, 0.8 V rise time accelerator threshold, and active HIGH ENABLE/READY pins. It operates from 2.7 V to 5.5 V and supports up to 400 kHz clock frequency in cPCI, VME, and AdvancedTCA card applications.
For engineers reviewing the PCA9513ADP,118 datasheet, PCA9513ADP,118 pinout, PCA9513ADP,118 application, or PCA9513ADP,118 equivalent, this device delivers verified hot-swap control logic, bus capacitance isolation, dynamic offset I/O compatibility, and PICMG-compliant current-source pull-up behavior - critical for multipoint backplane reliability and signal integrity validation.
Technical Context
The PCA9513ADP,118 implements a dynamic offset connection circuit that isolates backplane and card-side bus capacitances while enabling bidirectional level-passing between SDAIN/SDAOUT and SCLIN/SCLOUT. Its start-up sequence enforces bus idle detection before connection and uses undervoltage lockout (UVLO) to maintain high-impedance during power ramp-up.
It integrates 2 mA ∆V/∆t rise time accelerators triggered at 0.8 V, requiring matched VCC and bus pull-up voltage. The 92 µA current source on SDAIN/SCLIN remains active only when ENABLE is HIGH and pin voltage ≤ VCC, providing stable RC timing across card insertion/removal events.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 2.7 V to 5.5 V - enables interoperability across 3.3 V and 5 V backplane domains without level-shifting components. |
| Max Clock Frequency | 400 kHz - fully supports I²C Fast Mode and SMBus timing requirements in live-insertion systems. |
| Rise Time Accelerator Threshold | 0.8 V - provides 0.2 V higher noise margin than PCA9511A (0.6 V), reducing false edge triggering in noisy backplanes. |
| SDAIN/SCLIN Current Source | 92 µA (typical) - replaces external pull-ups in PICMG applications, ensuring consistent rise time as cards are added/removed. |
| Propagation Delay (tPHL) | 80 ns max - guarantees deterministic timing for arbitration and clock stretching in multi-master I²C systems. |
| ENABLE Input Logic | Active HIGH - simplifies control interface with standard GPIOs and avoids inversion logic in hot-swap sequencers. |
| READY Output Type | Open-drain - allows wired-OR status signaling across multiple buffers and flexible pull-up configuration (e.g., 10 kΩ to VCC). |
Pinout & Package
TSSOP8 package (SOT505-1): plastic thin shrink small outline, 8 leads, 3 mm body width, lead pitch 0.65 mm - optimized for space-constrained peripheral card edge mounting.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: ENABLE | Chip enable input | Drives device into low-current disconnect mode (<16 µA) when LOW; initiates initialization and connection sequencing when HIGH. |
| 2: SCLOUT | SCL bus output to card side | Bidirectionally buffers SCL signals to card peripherals; isolated from backplane capacitance during hot insertion. |
| 3: SCLIN | SCL bus input from backplane side | Accepts SCL from backplane; features 92 µA current source (PCA9513A only) and 0.8 V rise time accelerator trigger. |
| 4: GND | Ground reference | Must connect to low-impedance ground plane to ensure noise immunity and proper UVLO operation. |
| 5: READY | Open-drain status output | Asserts HIGH only after ENABLE HIGH + bus idle detection + internal references stabilized - confirms safe connection state. |
| 6: SDAIN | SDA bus input from backplane side | Accepts SDA from backplane; includes same 92 µA current source and rise time acceleration as SCLIN. |
| 7: SDAOUT | SDA bus output to card side | Drives card-side SDA; mirrors SDAIN logic with dynamic offset isolation and slew-rate-controlled pull-down. |
| 8: VCC | Power supply input | Supplies all internal circuitry; must match bus pull-up voltage to enable rise time accelerators and avoid clamping. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional SDA/SCL buffering | Isolates backplane and card-side bus capacitances to prevent rise/fall time degradation during live insertion. |
| Integrated 92 µA current sources | Replaces external pull-up resistors on SDAIN/SCLIN, eliminating RC variation across card population changes. |
| 0.8 V rise time accelerator threshold | Improves noise immunity over legacy 0.6 V designs, reducing spurious clock edges in electrically noisy backplanes. |
| Dynamic offset I/O architecture | Enables series/parallel cascading with other PCA951xA devices and compatibility with PCA9517 A-side interfaces. |
| Hot-swap control logic | Waits for STOP condition or bus idle before connecting sides - prevents data corruption during card insertion/removal. |
Applications
| cPCI Hot-Swap Card Interface | VME Backplane Isolation |
|---|---|
Use Scenario: Inserting/removing I/O cards into powered cPCI chassis while maintaining system-level I²C communication integrity. IC Role / Device Role / Timing Role: Bidirectional bus buffer enforcing controlled connection timing and isolating card capacitance from backplane. Use Value: Eliminates need for manual power cycling; ensures SCL/SDA signal integrity at 400 kHz despite variable card count and trace length. |
Use Scenario: Preventing bus contention when adding sensor or FPGA modules to live VME backplanes in industrial control systems. IC Role / Device Role / Timing Role: Capacitance-isolating buffer with 0.8 V rise time accelerator for robust noise rejection in EMI-prone environments. Use Value: Maintains I²C timing compliance (tLOW ≥1.3 µs, tf ≤300 ns) under full card load without redesigning pull-up networks. |
| AdvancedTCA Shelf Management | PICMG 2.11 Compliant Carrier |
Use Scenario: Enabling hot-plug capability for AdvancedTCA blades communicating via shelf manager I²C buses. IC Role / Device Role / Timing Role: Hot-swap controller with READY output synchronized to bus idle detection for firmware-safe card enumeration. Use Value: Provides hardware-confirmed "ready" signal to shelf manager, eliminating software polling delays and race conditions. |
Use Scenario: Implementing PICMG 2.11-compliant carrier boards where backplane I²C must drive multiple peripheral cards without signal degradation. IC Role / Device Role / Timing Role: Current-source-equipped buffer delivering stable 92 µA pull-up on SDAIN/SCLIN per PICMG spec. Use Value: Guarantees consistent rise time across all card slots regardless of insertion order or count - no per-slot resistor tuning required. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar I²C bus buffering applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| PCA9514ADP,118 | Same TSSOP8 package and pinout; lacks 92 µA current sources on SDAIN/SCLIN but adds hardware disable for rise time accelerators in lightly loaded systems. | Preferred where external pull-ups are already present and rise time acceleration needs selective disabling. | Select PCA9514ADP,118 when system design uses discrete pull-ups and requires configurable accelerator enablement. |
| PCA9517DP,118 | Dual-channel, asymmetric architecture: A-side supports dynamic offset (compatible with PCA9513A), B-side uses static offset; no integrated current sources. | Used for bridging I²C domains with different voltage levels or noise profiles; not drop-in replaceable due to functional asymmetry. | Choose PCA9517DP,118 only for level-translating or mixed-technology bus segmentation - not for direct PCA9513ADP,118 replacement. |
Compared with PCA9514ADP,118, the PCA9513ADP,118 provides essential current-source pull-ups for PICMG compliance, while PCA9517DP,118 introduces architectural asymmetry unsuitable for pure hot-swap isolation - making PCA9513ADP,118 the sole choice for standards-conforming backplane-to-card buffering with integrated biasing.
Availability
PCA9513ADP,118 is available at Aetrix Electronics and suitable for cPCI, VME, and AdvancedTCA system integration requiring stable component supply, long-term lifecycle support, and guaranteed hot-swap reliability in industrial embedded platforms.
Supply support for PCA9513ADP,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 specializing in secure connectivity solutions for automotive, industrial, and IoT applications, with deep expertise in interface and bus technology.
The PCA9513A product line was engineered specifically for hot-swappable backplane architectures in modular computing systems, addressing signal integrity, capacitance isolation, and standards-compliant insertion timing.
FAQ
What is the primary function of the PCA9513ADP,118 in a backplane system?
The PCA9513ADP,118 acts as a hot-swappable I²C-bus and SMBus buffer that isolates backplane and card-side capacitances while enabling safe live insertion and removal of I/O cards. Its core function is to prevent bus corruption by enforcing a controlled connection sequence - waiting for STOP or bus idle before linking SDAIN/SDAOUT and SCLIN/SCLOUT - and maintaining signal integrity through dynamic offset buffering and 0.8 V rise time acceleration. This behavior is explicitly defined in the PCA9513ADP,118 datasheet Section 8.1 and Figure 1.
Does the PCA9513ADP,118 require external pull-up resistors on SDAIN and SCLIN?
No, the PCA9513ADP,118 integrates a 92 µA current source on both SDAIN and SCLIN pins, eliminating the need for external pull-up resistors in PICMG-compliant applications. This current source activates during initialization when ENABLE is HIGH and remains active until ENABLE goes LOW or power is removed. It becomes high-impedance whenever the pin voltage exceeds VCC, ensuring safe operation. This feature is unique to the PCA9513A variant and is documented in Table 5 and Section 8.1 of the PCA9513ADP,118 datasheet.
How does the READY pin indicate connection status in the PCA9513ADP,118?
The READY pin on the PCA9513ADP,118 is an open-drain output that asserts HIGH only after three conditions are met: ENABLE is HIGH, internal references are stabilized, and a STOP condition or bus idle is detected on SDAIN/SCLIN. It pulls LOW if ENABLE is LOW or during power-up initialization. The pin can sink 3 mA while holding ≤0.4 V, requiring an external 10 kΩ pull-up to VCC. This precise sequencing ensures firmware can safely detect hardware readiness before initiating I²C transactions - a behavior confirmed in Section 8.6 and Figure 18 of the PCA9513ADP,118 datasheet.
Can the PCA9513ADP,118 be used in series with other PCA951xA devices?
Yes, the PCA9513ADP,118 supports series and parallel connection with other PCA9510A/11A/12A/13A/14A devices due to its dynamic offset I/O driver design. However, the datasheet explicitly warns against connecting it to static-offset I/Os such as those on the PCA9515/16/17 B-side or P82B96. Maximum recommended cascade depth is two devices to limit cumulative offset voltage (≤0.150 V) and avoid false rising-edge triggering - a constraint derived from Section 8.3 analysis of Voffset vs. VOL in the PCA9513ADP,118 datasheet.
What is the significance of the 0.8 V rise time accelerator threshold in the PCA9513ADP,118?
The 0.8 V rise time accelerator threshold in the PCA9513ADP,118 provides 0.2 V greater noise margin than the 0.6 V threshold used in earlier PCA9511A devices, significantly reducing susceptibility to false clock edges caused by voltage bounce or EMI on SDA/SCL lines. This threshold is fixed and non-configurable, and requires VCC to match the bus pull-up voltage to function correctly. Its impact on system robustness is quantified in Section 8.3 and Figure 5 of the PCA9513ADP,118 datasheet, where it directly enables reliable operation in noisy cPCI/VME backplanes.
PCA9513ADP,118 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm 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-TSSOP
PCA9513ADP,118 FAQ
1.How can I place an order for PCA9513ADP,118 through Aetrix?
Please submit a Request for Quotation (RFQ) for PCA9513ADP,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 PCA9513ADP,118 reliable?
The price and inventory of PCA9513ADP,118 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PCA9513ADP,118 is usually 5 days.
3.What payment methods are accepted for PCA9513ADP,118?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PCA9513ADP,118 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PCA9513ADP,118?
PCA9513ADP,118 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PCA9513ADP,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 PCA9513ADP,118?
For technical support, including PCA9513ADP,118 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PCA9513ADP,118 requirements.
6.How does Aetrix verify that PCA9513ADP,118 is sourced from the original manufacturer or authorized distributors?
All PCA9513ADP,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 PCA9513ADP,118 meets industry standards.
7.What is the process for return or replacement of PCA9513ADP,118?
All PCA9513ADP,118 units undergo pre-shipment inspection (PSI). If there is an issue with PCA9513ADP,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 PCA9513ADP,118 part is unused and in its original packaging.
Return procedure for PCA9513ADP,118:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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