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NXP Semiconductors PCA9675PW/S911,118
- Part No.:
- PCA9675PW/S911,118
- Manufacturer:
- NXP Semiconductors
- Category:
- I/O Expanders
- Package:
- 24-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
PCA9675PW/S911,118.pdf
- Description:
- IC XPNDR 1MHZ I2C 24TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,361
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Product details
Overview
PCA9675PW/S911,118 from NXP Semiconductors is a 16-bit remote I/O expander for Fast-mode Plus (Fm+) I²C-bus systems, providing quasi-bidirectional port expansion with interrupt signaling. It operates from 2.3 V to 5.5 V, supports 1 MHz I²C-bus speed, delivers 25 mA sink per I/O pin, and features 400 mA total package sink capacity-enabling direct LED PWM dimming in signage and industrial control interfaces.
For engineers reviewing the PCA9675PW/S911,118 datasheet, PCA9675PW/S911,118 pinout, PCA9675PW/S911,118 application, or PCA9675PW/S911,118 equivalent, this device serves as a drop-in upgrade to PCF8575 with higher bus speed, greater drive strength, expanded address space (64 options), and integrated interrupt output for efficient microcontroller offloading in resource-constrained embedded designs.
Technical Context
The PCA9675PW/S911,118 implements a quasi-bidirectional I/O architecture where all 16 pins (P00–P07, P10–P17) default to high-impedance inputs at power-up and support latched output mode. Its I²C interface complies with Standard-mode (100 kHz), Fast-mode (400 kHz), and Fast-mode Plus (1 MHz) specifications, with SDA capable of sinking 30 mA into 4000 pF buses.
It integrates an active-low open-drain interrupt (INT) that asserts on any input edge change, enabling asynchronous event notification without polling. Internal Power-On Reset initializes registers and I/Os, while software reset via General Call address 00h + data byte 06h allows bus-wide recovery without hardware reset.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| I²C Bus Speed | 1 MHz Fast-mode Plus - enables real-time LED dimming control and reduces I/O polling latency vs. 400 kHz alternatives. |
| Supply Voltage Range | 2.3 V to 5.5 V - interoperable with 3.3 V and 5 V microcontrollers without level-shifting. |
| Per-Pin Sink Current | 25 mA - sufficient to directly drive standard LEDs without external drivers. |
| Total Package Sink | 400 mA - supports simultaneous illumination of 16 × 25 mA LEDs at full brightness. |
| Slave Addresses | 64 programmable options via AD0–AD2 - eliminates address conflicts in multi-device I²C networks. |
| Interrupt Output | Active-low open-drain INT - connects directly to MCU interrupt pins for event-driven I/O monitoring. |
| ESD Rating | 2000 V HBM / 1000 V CDM - meets industrial reliability requirements for board-level handling and operation. |
Pinout & Package
TSSOP24 package (SOT355-1), 24-pin plastic thin shrink small outline, 4.4 mm body width. Exposed pad not present; standard thermal dissipation via PCB copper.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| INT (Pin 1) | Interrupt output | Active-low open-drain signal notifying MCU of I/O state changes; requires external pull-up. |
| AD1 (Pin 2), AD2 (Pin 3), AD0 (Pin 21) | Slave address inputs | Binary-select 64 I²C addresses; no internal pull-ups - must be hard-wired to VDD/VSS or controlled externally. |
| P00–P07 (Pins 4–11), P10–P17 (Pins 13–20) | Quasi-bidirectional I/O ports | 16 independent pins; default to inputs at power-up; sink up to 25 mA each with latched output capability. |
| VDD (Pin 24), VSS (Pin 12) | Power supply | Supports 2.3–5.5 V operation; I/Os tolerant to 5.5 V regardless of VDD level. |
| SCL (Pin 22), SDA (Pin 23) | I²C bus interface | Compliant with Fm+ timing; SDA sinks 30 mA - reduces need for bus buffers in large-node systems. |
Key Features
| Feature | Design Value |
|---|---|
| 1 MHz I²C-bus interface | Enables faster I/O updates than PCF8575 (400 kHz), critical for responsive LED dimming and real-time status reporting. |
| 64 programmable slave addresses | Eliminates address collisions in dense I²C systems (e.g., server backplanes with >8 expanders), unlike PCF8575's 8-address limit. |
| 400 mA total sink capacity | Allows all 16 outputs to drive 25 mA LEDs simultaneously - supports full-panel signage without current-sharing circuitry. |
| Readable Device ID | 24-bit read-only field (manufacturer + part ID + revision) simplifies firmware validation and BOM traceability in production. |
| Software reset via General Call | Bus-wide reset using I²C address 00h + data 06h - recovers hung devices without power cycle or MCU GPIO intervention. |
Applications
| LED Signs and Displays | Servers and Data Center Hardware |
|---|---|
|
Use Scenario: Driving 16-channel LED matrix in outdoor signage with PWM dimming control. IC Role / Device Role / Timing Role: Remote I/O expander managing LED anode/cathode switching and brightness via I²C-hosted PWM register writes. Use Value: 1 MHz bus speed ensures flicker-free dimming updates; 25 mA per pin eliminates discrete transistor drivers. |
Use Scenario: Monitoring and controlling hot-swap FRU status, fan tachometers, and power rail sequencing in 1U servers. IC Role / Device Role / Timing Role: System management I/O hub interfacing with BMC over I²C, using INT to signal fault conditions asynchronously. Use Value: 64 address options allow unique assignment across dozens of boards; 400 mA sink handles multiple LED indicators per node. |
| Industrial PLC I/O Modules | Gaming Machine Control Panels |
|
Use Scenario: Adding digital input/output points to modular PLC base units for sensor/actuator interfacing. IC Role / Device Role / Timing Role: Isolated remote I/O node translating field signals to I²C for main controller, with INT signaling input transitions. Use Value: 2.3–5.5 V operation matches industrial supply rails; ESD rating meets IEC 61000-4-2 Level 3 requirements. |
Use Scenario: Managing button matrix scanning, coin acceptor status, and payout lamp control in casino gaming cabinets. IC Role / Device Role / Timing Role: Dedicated I/O expander offloading real-time input sampling and lamp drive from main game CPU. Use Value: Quasi-bidirectional ports simplify button debounce logic; latched outputs prevent unintended lamp toggling during bus arbitration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar remote I/O expander applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| PCF8575PW,118 | Max 400 kHz I²C, 3 mA SDA drive, 100 mA total sink, only 8 slave addresses. | Limited to low-speed, low-current I/O expansion; unsuitable for LED dimming or dense bus topologies. | Select when cost sensitivity outweighs performance needs and bus node count is ≤8. |
| PCA9674PW,118 | Same package and pinout, but 8-bit I/O (vs. 16-bit); identical 1 MHz speed and 25 mA/pin drive. | Half the I/O count - appropriate for compact designs needing fewer signals but same timing/performance. | Choose for space-constrained layouts where 8 I/Os suffice and PCB reuse with PCA9675 is desired. |
Compared with PCF8575PW,118, PCA9675PW/S911,118 delivers 2.5× faster bus throughput and 4× higher current drive; versus PCA9674PW,118, it doubles I/O count while maintaining identical timing, drive, and footprint compatibility - making it optimal for scalable, high-density I²C I/O expansion.
Availability
PCA9675PW/S911,118 is available at Aetrix Electronics and suitable for LED signage, industrial PLCs, and server management systems requiring stable component supply, long-term lifecycle support, and guaranteed authenticity.
Supply support for PCA9675PW/S911,118 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 I²C and system-level interface ICs.
The PCA9675 belongs to NXP's Fast-mode Plus I²C I/O expander product line, designed specifically to replace legacy PCF857x devices in applications demanding higher speed, greater drive strength, and enhanced system scalability.
FAQ
What is the maximum I²C-bus speed supported by the PCA9675PW/S911,118?
The PCA9675PW/S911,118 supports Fast-mode Plus (Fm+) I²C operation up to 1 MHz, significantly exceeding the 400 kHz limit of PCF8575. This higher speed enables faster I/O configuration updates and real-time LED dimming control without bus bottlenecks. The device remains backward-compatible with Standard-mode (100 kHz) and Fast-mode (400 kHz) hosts, ensuring seamless integration across legacy and next-generation systems.
How does the interrupt (INT) pin function on the PCA9675PW/S911,118?
The PCA9675PW/S911,118 features an active-low open-drain INT pin that asserts whenever any of its 16 I/O pins transitions (rising or falling edge). This allows the microcontroller to respond asynchronously to input changes without continuous polling. The interrupt clears automatically upon reading the affected port or writing new output data - eliminating the need for explicit deassert commands in firmware.
Can the PCA9675PW/S911,118 directly drive LEDs, and what current capability does it provide?
Yes, the PCA9675PW/S911,118 can directly drive LEDs: each of its 16 quasi-bidirectional I/O pins sinks up to 25 mA, and the total package sink capacity is 400 mA. This allows simultaneous full-brightness operation of all 16 outputs - ideal for LED signage, status indicators, and gaming panel lamps without external driver transistors or current-limiting resistors on the source side.
What are the voltage operating ranges and I/O tolerance specifications for the PCA9675PW/S911,118?
The PCA9675PW/S911,118 operates from 2.3 V to 5.5 V on VDD and features 5.5 V-tolerant I/Os - meaning all port pins, SDA, SCL, AD0–AD2, and INT remain functional and safe even when interfaced with 5 V logic, regardless of whether VDD is 3.3 V or 5 V. This simplifies mixed-voltage system design and eliminates level-shifters in many common configurations.
How many I²C slave addresses does the PCA9675PW/S911,118 support, and how are they configured?
The PCA9675PW/S911,118 supports 64 unique I²C slave addresses, selected via three hardware address pins (AD0, AD1, AD2). Each pin accepts VDD or VSS (no internal pull-ups), yielding 2³ = 8 combinations - but combined with the fixed 7-bit base address (00100xx), the full range spans hex 20h to BEh. This eliminates address conflicts in complex systems with multiple expanders, unlike the PCF8575's 8-address limit.
PCA9675PW/S911,118 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- -
- Package/Case:
- 24-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Number of I/O:
- 16
- Interface:
- I2C
- Interrupt Output:
- Yes
- Features:
- POR
- Output Type:
- Push-Pull
- Current - Output Source/Sink:
- 100µA, 25mA
- Clock Frequency:
- 1 MHz
- Voltage - Supply:
- 2.3V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 24-TSSOP
PCA9675PW/S911,118 FAQ
1.How can I place an order for PCA9675PW/S911,118 through Aetrix?
Please submit a Request for Quotation (RFQ) for PCA9675PW/S911,118 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 PCA9675PW/S911,118 reliable?
The price and inventory of PCA9675PW/S911,118 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PCA9675PW/S911,118 is usually 5 days.
3.What payment methods are accepted for PCA9675PW/S911,118?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PCA9675PW/S911,118 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PCA9675PW/S911,118?
PCA9675PW/S911,118 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PCA9675PW/S911,118 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 PCA9675PW/S911,118?
For technical support, including PCA9675PW/S911,118 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PCA9675PW/S911,118 requirements.
6.How does Aetrix verify that PCA9675PW/S911,118 is sourced from the original manufacturer or authorized distributors?
All PCA9675PW/S911,118 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 PCA9675PW/S911,118 meets industry standards.
7.What is the process for return or replacement of PCA9675PW/S911,118?
All PCA9675PW/S911,118 units undergo pre-shipment inspection (PSI). If there is an issue with PCA9675PW/S911,118, 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 PCA9675PW/S911,118 part is unused and in its original packaging.
Return procedure for PCA9675PW/S911,118:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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