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NXP Semiconductors PCA9527DPZ
- Part No.:
- PCA9527DPZ
- Manufacturer:
- NXP Semiconductors
- Category:
- Signal Buffers, Repeaters, Splitters
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
PCA9527DPZ.pdf
- Description:
- IC REDRIVER I2C 1CH 10TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:9,613
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Product details
Overview
PCA9527DPZ from NXP Semiconductors is a 3-channel bidirectional I²C/SMBus/DCD bus extender with dual-supply voltage translation (2.7 V–5.5 V on port A, 2.7 V–3.6 V on port B), rise time accelerators on SDAA/SCLA for HDMI DDC cable drive up to 18 m, and 5 V-tolerant CEC channel powered by VCC(B). It isolates bus capacitance (1400 pF on port A, 400 pF on port B) and enables star or series topologies in HDMI source/sink systems.
For engineers reviewing the PCA9527DPZ datasheet, PCA9527DPZ pinout, PCA9527DPZ application, or PCA9527DPZ equivalent, key selection criteria include its dual-rail level-shifting capability, port-specific rise time acceleration (SDAA/SCLA only), static level offset on port B, lock-up-free bidirectional arbitration support, and compatibility with HDMI DDC v1.3 distance requirements.
Technical Context
The PCA9527DPZ implements asymmetric I/O architecture: port A (SDAA, SCLA, CECA) features rise time accelerators on clock/data lines (but not CEC), 5 V tolerance, and near-0 V LOW output; port B (SDAB, SCLB, CECB) uses static level offset with ~0.5 V LOW and 5 V tolerance, referenced solely to VCC(B). Direction control is threshold-based (0.3×VCC(A)/VCC(B)), enabling automatic bidirectional signal flow without external logic.
It supports Standard-mode and Fast-mode I²C-bus (up to 400 kHz), maintains full protocol transparency-including arbitration and clock stretching-and incorporates power-up sequencing immunity (VCC(A)/VCC(B) may be applied in any order). The EN pin provides active-HIGH enable with internal 100 kΩ pull-up to VCC(B), requiring idle-bus state transitions to prevent bus hang.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Channels | 3 independent bidirectional channels: SDA, SCL, CEC - each isolated for capacitance and voltage domain separation |
| Port A supply range | 2.7 V to 5.5 V - enables direct interface to 5 V HDMI DDC lines while supporting 3.3 V system controllers |
| Port B supply range | 2.7 V to 3.6 V - matches typical SoC I²C-bus core voltages and prevents overvoltage stress on low-voltage targets |
| Rise time accelerator | Active only on SDAA and SCLA - delivers boosted pull-up current (6 mA typ) to meet 1 μs I²C rise time at 1400 pF load |
| CEC channel | 5 V tolerant, no rise time accelerator, powered by VCC(B) - suitable for low-speed interrupt/reset signaling over long cables |
| Propagation delay | A→B: 125–310 ns; B→A: 70–350 ns - deterministic latency critical for timing-critical HDMI EDID reads and CEC command handshaking |
| ESD rating | 8000 V HBM - ensures robustness during HDMI cable hot-plug events and board-level handling |
Pinout & Package
TSSOP10 package (SOT552-1), 3 mm body width, surface-mount, RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC(A) | Port A supply rail | Provides power and reference (0.3×VCC(A)) for SDAA/SCLA rise time accelerator and input thresholds |
| VCC(B) | Port B supply rail | Powers port B drivers, CEC channel, EN pull-up, and sets 0.3×VCC(B) threshold for direction detection |
| SCLA | Port A clock line | Rise time accelerated open-drain I/O; drives HDMI DDC clock up to 18 m; 5 V tolerant when unpowered |
| SCLB | Port B clock line | Static level offset I/O; outputs ~0.5 V LOW; compatible with PCA9515/PCA9517A port B but not with rise-time-accelerated buffers |
| SDAA | Port A data line | Rise time accelerated open-drain I/O; meets HDMI DDC v1.3 capacitance spec; 5 V tolerant |
| SDAB | Port B data line | Static level offset I/O; enables interoperability with legacy I²C devices on 2.7–3.6 V buses |
| CECA | Port A CEC line | Normal open-drain I/O (no accelerator); 5 V tolerant; used for CEC signaling or general-purpose interrupt/reset |
| CECB | Port B CEC line | Static level offset output; referenced to VCC(B); allows CEC integration into low-voltage controller domains |
| GND | Supply ground | Common reference for all I/Os and internal circuitry; must be low-impedance for noise immunity |
| EN | Enable input | Active-HIGH control; internal 100 kΩ pull-up to VCC(B); must transition only during bus idle to avoid lock-up |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional capacitance isolation | Supports 1400 pF on port A and 400 pF on port B - enables HDMI DDC compliance across 18 m cables without violating rise time specs |
| Asymmetric I/O architecture | Port A: near-0 V LOW + rise time acceleration; Port B: 0.5 V LOW + static offset - eliminates cumulative voltage shift in multi-repeater chains |
| Lock-up free operation | Threshold-based direction control with 70 mV hysteresis (VOL − VILc) prevents bus contention deadlock during simultaneous LOW assertions |
| Powered-off high-impedance pins | All I/Os remain high-Z when VCC(A) = 0 V or VCC(B) = 0 V - enables safe hot-swap and partial power-down in modular systems |
| I²C/SMBus/DDC compatibility | Full transparency to arbitration, clock stretching, and START/STOP conditions - requires no firmware changes when inserted into existing I²C designs |
Applications
| HDMI DDC Source (e.g., STB) | HDMI DDC Sink (e.g., LCD TV) |
|---|---|
Use Scenario: Digital video player or set-top box reads EDID from connected display via HDMI DDC channel over >10 m cable. IC Role / Device Role / Timing Role: PCA9527DPZ acts as a level-translating, capacitance-isolating repeater between the 3.3 V SoC I²C controller and 5 V DDC bus. Use Value: Enables reliable EDID acquisition at 100 kHz with <1 μs rise time despite 1400 pF total load - meeting HDMI DDC v1.3 specification. |
Use Scenario: LCD TV receives EDID requests from upstream HDMI source and responds using its internal 5 V DDC interface. IC Role / Device Role / Timing Role: PCA9527DPZ buffers and translates signals from 5 V DDC line to 3.3 V SoC I²C bus while maintaining protocol integrity. Use Value: Allows use of standard 47 kΩ SCLA pull-up (per HDMI spec) without compromising low-voltage controller reliability or timing margins. |
| HDMI CEC Control Channel | I²C Bus Extension in Industrial Backplane |
Use Scenario: Consumer electronics device sends CEC commands (e.g., "Power On") over HDMI cable to control AV receiver or soundbar. IC Role / Device Role / Timing Role: PCA9527DPZ routes CEC traffic bidirectionally between 5 V DDC domain and 3.3 V microcontroller, with CECA/CECB acting as dedicated CEC path. Use Value: Provides 5 V tolerance and noise-immune CEC signaling at <10 kHz, eliminating need for discrete level shifters or optocouplers. |
Use Scenario: Modular industrial system extends I²C communication across multiple PCBs in a backplane with >500 pF total bus capacitance. IC Role / Device Role / Timing Role: PCA9527DPZ segments bus capacitance into isolated domains, allowing multiple controllers and targets to coexist without timing violation. Use Value: Supports star topology with multiple PCA9527DPZ port A nodes sharing one common bus - simplifies routing and improves fault containment. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional I²C bus extender applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| PCA9517DPZ | Single-channel, no rise time accelerator, port B only (no port A), 3.3 V–5 V translation only | Limited to short-distance (<2 m), low-capacitance I²C extension; lacks HDMI DDC compliance and CEC support | Select when only basic level shifting is needed and cable length/capacitance is minimal |
| PCA9515DPZ | 2-channel (SDA/SCL only), no CEC channel, rise time accelerator on both ports, 2.7 V–5.5 V on both sides | Cannot support CEC functionality; symmetric rise time acceleration causes cumulative offset in multi-stage configurations | Choose for non-HDMI I²C extension where CEC is unused and port symmetry is acceptable |
Compared with PCA9517DPZ and PCA9515DPZ, the PCA9527DPZ uniquely combines 3-channel operation, asymmetric rise time acceleration (port A only), integrated CEC support, and HDMI DDC v1.3 compliance - making it the only option qualified for long-cable HDMI source/sink EDID and CEC implementations.
Availability
PCA9527DPZ is available at Aetrix Electronics and suitable for HDMI DDC source/sink systems, consumer electronics CEC control, industrial I²C backplane extension, and embedded display interface designs requiring stable component supply and long-term lifecycle support.
Supply support for PCA9527DPZ 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 consumer applications, with deep expertise in I²C, SMBus, and HDMI interface IP.
The PCA9527DPZ belongs to NXP's HDMI interface and I²C buffer product line, designed specifically to solve long-cable signal integrity challenges in consumer display ecosystems while maintaining full protocol compliance.
FAQ
What is the primary function of the PCA9527DPZ in an HDMI system?
The PCA9527DPZ serves as a 3-channel bidirectional bus extender that isolates capacitance and translates voltage levels between a 3.3 V SoC I²C controller and the 5 V HDMI DDC bus. It enables reliable EDID communication over cables up to 18 meters by integrating rise time accelerators on SDAA and SCLA, while also supporting CEC signaling via its dedicated CECA/CECB channel. This makes the PCA9527DPZ essential for HDMI source and sink devices complying with DDC v1.3 specifications.
Can the PCA9527DPZ be used in a star topology configuration?
Yes, the PCA9527DPZ supports star topology: multiple devices can connect their port A pins (SDAA, SCLA, CECA) to a common bus, enabling all nodes to communicate directly without cascading delays. This is possible because port A has no static level offset and is designed for shared-bus operation, unlike port B which uses static offset and must be point-to-point. The PCA9527DPZ's architecture ensures no cumulative voltage shift or timing skew in such configurations.
How does the EN pin affect PCA9527DPZ operation, and what precautions apply?
The EN pin is an active-HIGH enable input with internal 100 kΩ pull-up to VCC(B). When pulled LOW, it places the PCA9527DPZ in power-down mode, disabling all drivers and reducing quiescent current to ≤60 μA. However, EN must only be toggled when both global I²C bus and local ports are idle - changing EN state mid-transaction will halt arbitration and cause bus lock-up. The PCA9527DPZ datasheet specifies ≥200 μs setup/hold times relative to START/STOP conditions to ensure safe enable/disable sequencing.
Why does the PCA9527DPZ have different supply voltage ranges for port A and port B?
Port A (2.7 V–5.5 V) is designed to interface directly with 5 V HDMI DDC lines, while port B (2.7 V–3.6 V) matches modern low-voltage SoCs and microcontrollers. This asymmetry allows seamless level translation without external components. The PCA9527DPZ uses VCC(A) to generate the 0.3×VCC(A) threshold for rise time accelerator activation and port A input detection, while VCC(B) powers port B drivers and sets its 0.3×VCC(B) direction threshold - ensuring correct cross-port signal interpretation regardless of rail combination.
Is the PCA9527DPZ compatible with Fast-mode I²C (400 kHz) operation?
Yes, the PCA9527DPZ supports Fast-mode I²C up to 400 kHz, as confirmed by its dynamic characteristics table (tPHL/tPLH max 330 ns, tTHL/tTLH max 280 ns). However, system-level frequency may be limited by added propagation delay and RC time constants from external pull-ups and cable capacitance. For HDMI DDC applications, which operate at ≤100 kHz per specification, the PCA9527DPZ guarantees full compliance including rise time (<1 μs) and bus capacitance (1400 pF) requirements - verified in actual HDMI source/sink reference designs.
PCA9527DPZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- -
- Package/Case:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Buffer, Accelerator
- Applications:
- I2C
- Input:
- 2-Wire Bus
- Output:
- 2-Wire Bus
- Data Rate (Max):
- 400kHz
- Number of Channels:
- 3
- Delay Time:
- 350ns
- Signal Conditioning:
- -
- Capacitance - Input:
- 8 pF
- Voltage - Supply:
- 2.7V ~ 3.6V, 2.7V ~ 5.5V
- Current - Supply:
- 100mA
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-TSSOP
PCA9527DPZ FAQ
1.How can I place an order for PCA9527DPZ through Aetrix?
Please submit a Request for Quotation (RFQ) for PCA9527DPZ 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 PCA9527DPZ reliable?
The price and inventory of PCA9527DPZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PCA9527DPZ is usually 5 days.
3.What payment methods are accepted for PCA9527DPZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PCA9527DPZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PCA9527DPZ?
PCA9527DPZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PCA9527DPZ 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 PCA9527DPZ?
For technical support, including PCA9527DPZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PCA9527DPZ requirements.
6.How does Aetrix verify that PCA9527DPZ is sourced from the original manufacturer or authorized distributors?
All PCA9527DPZ 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 PCA9527DPZ meets industry standards.
7.What is the process for return or replacement of PCA9527DPZ?
All PCA9527DPZ units undergo pre-shipment inspection (PSI). If there is an issue with PCA9527DPZ, 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 PCA9527DPZ part is unused and in its original packaging.
Return procedure for PCA9527DPZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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