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NXP Semiconductors PCA9672PW,118
- Part No.:
- PCA9672PW,118
- Manufacturer:
- NXP Semiconductors
- Category:
- I/O Expanders
- Package:
- 16-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
PCA9672PW,118.pdf
- Description:
- IC XPNDR 1MHZ I2C 16TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,443
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Product details
Overview
PCA9672PW,118 from NXP Semiconductors is an 8-bit remote I/O expander IC for Fast-mode Plus (Fm+) I²C-bus systems, operating from 2.3 V to 5.5 V with 5.5 V-tolerant I/Os, featuring 1 MHz I²C interface, 25 mA per-pin sink capability for direct LED drive, and active LOW open-drain interrupt output. It serves as a parallel port extender in microcontroller-based systems requiring scalable GPIO expansion with minimal bus overhead.
For engineers reviewing the PCA9672PW,118 datasheet, PCA9672PW,118 pinout, PCA9672PW,118 application, or PCA9672PW,118 equivalent, this page delivers verified electrical parameters, TSSOP16 package mapping, interrupt-driven I/O monitoring behavior, hardware/software reset implementation details, and validated alternative parts for industrial control, LED signage, and keypad interface designs.
Technical Context
The PCA9672PW,118 implements quasi-bidirectional I/O architecture with no direction register-each of eight ports (P0–P7) functions as input or output based on register write value and external voltage state. Its internal 100 µA weak pull-up and strong 25 mA sink enable simultaneous LED driving and keypad scanning without external components.
It integrates Fast-mode Plus I²C logic supporting 1 MHz operation, 16 programmable slave addresses via AD0/AD1 pins, Power-On Reset (POR), active LOW hardware RESET, and an open-drain INT output that asserts when any input state differs from its corresponding register value-enabling efficient event-driven polling reduction in embedded systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| I²C Bus Speed | 1 MHz Fast-mode Plus (Fm+) - enables high-speed GPIO updates and PWM dimming control without bus contention. |
| Supply Voltage Range | 2.3 V to 5.5 V - supports single-supply operation across 3.3 V and 5 V microcontroller domains. |
| I/O Sink Current | 25 mA per pin (latched output) - drives standard LEDs directly without external transistors or current-limiting resistors on the anode side. |
| Total Package Sink | 200 mA - allows concurrent activation of multiple outputs (e.g., 8 × 25 mA) within thermal limits of TSSOP16 package. |
| Standby Current | 2.5 µA typical (static) - suitable for battery-powered mobile and portable equipment requiring ultra-low quiescent power. |
| Operating Temperature | −40 °C to +85 °C - qualified for industrial and automotive-adjacent environments including server racks and medical devices. |
| ESD Protection | 2000 V HBM, 1000 V CDM - meets JEDEC standards for robust handling in manufacturing and field deployment. |
Pinout & Package
TSSOP16 package (SOT403-1), 4.4 mm body width, 0.65 mm pitch, exposed pad not present - compatible with standard reflow profiles and automated optical inspection.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 AD0 | Slave address input 0 | Configures LSB of 7-bit I²C address; tied HIGH/LOW or to SCL/SDA to select one of 16 device addresses. |
| 2 AD1 | Slave address input 1 | Configures MSB of 7-bit I²C address; used with AD0 to avoid address collision in multi-device I²C networks. |
| 3 RESET | Active LOW hardware reset | Holding LOW for ≥tw(rst) forces all I/Os to input mode with 100 µA pull-up; requires external pull-up if unused. |
| 4–11 P0–P7 | Quasi-bidirectional I/O ports | No direction register needed; write '1' for input/high-Z, '0' for active LOW output; each sinks up to 25 mA. |
| 8 VSS | Ground reference | Primary supply return path; must be low-impedance connection to system ground plane. |
| 12 INT | Active LOW open-drain interrupt | Asserts when any P0–P7 input state changes vs. register; wired-OR capable for multi-device interrupt sharing. |
| 13 SCL | I²C serial clock input | Master-generated clock signal; accepts standard I²C timing and slew rate requirements for Fm+ operation. |
| 14 SDA | I²C serial data bidirectional | Open-drain line shared among all I²C devices; requires external pull-up resistor (typically 2.2 kΩ). |
| 16 VDD | Positive supply input | Power source for core logic and I/O drivers; 5.5 V tolerant allows use with 5 V systems even when VDD = 3.3 V. |
Key Features
| Feature | Design Value |
|---|---|
| Quasi-bidirectional I/O architecture | Eliminates need for separate direction register and simplifies firmware-single byte read/write controls all 8 ports simultaneously. |
| Fm+ I²C interface (1 MHz) | Enables real-time LED brightness control via PWM and reduces host CPU polling frequency in sensor/keypad applications. |
| Hardware + software reset support | RESET pin provides deterministic recovery; General Call address 00h + data 06h enables bus-wide reset without physical access. |
| Readable device ID | 24-bit hardwired ID (12-bit manufacturer, 9-bit part ID, 3-bit revision) accessible via reserved I²C address F8h/F9h-supports automated BOM verification. |
| Interrupt-driven change detection | INT output activates on rising/falling edge of any P0–P7 input-replaces continuous polling and lowers system power consumption. |
Applications
| LED Signage Control | Industrial Keypad Interface |
|---|---|
|
Use Scenario: Driving 8-segment alphanumeric displays and status indicators in outdoor digital signage cabinets with limited MCU GPIO. IC Role / Device Role / Timing Role: PCA9672PW,118 acts as parallel-to-I²C bridge, latching output states to maintain display segments during MCU sleep cycles. Use Value: 25 mA per-pin sink eliminates external driver transistors; 1 MHz I²C allows rapid refresh rates (>100 Hz) without bus congestion. |
Use Scenario: Scanning 4×4 matrix keypads in PLC operator panels where EMI immunity and long trace routing are critical. IC Role / Device Role / Timing Role: PCA9672PW,118 configures rows as outputs and columns as inputs with internal 100 µA pull-ups, detecting keypresses via interrupt-driven edge detection. Use Value: Active LOW INT signal reduces host polling overhead by >90%; 5.5 V-tolerant I/Os tolerate noisy 24 V industrial backplanes. |
| Server Rack Monitoring | Medical Device Status Panel |
|
Use Scenario: Monitoring fan tachometer signals, temperature sensor alerts, and power supply OK flags across 1U/2U server chassis. IC Role / Device Role / Timing Role: PCA9672PW,118 reads discrete status inputs and drives fault LEDs using same I²C bus shared with other PMBus/I²C sensors. Use Value: 16 configurable slave addresses allow up to 128 I/O points per bus; 2.5 µA standby current minimizes impact on always-on management controllers. |
Use Scenario: Managing indicator lights, button feedback, and isolation barrier status in Class II medical infusion pumps with strict leakage current limits. IC Role / Device Role / Timing Role: PCA9672PW,118 isolates MCU GPIO from front-panel circuitry while providing fail-safe LED drive with current-limited sink outputs. Use Value: Total 200 mA package sink capacity supports full-panel illumination; −40 °C to +85 °C rating ensures reliability in sterilization-cycle thermal environments. |
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 |
|---|---|---|---|
| PCA9674PW,118 | 16-bit I/O (vs. 8-bit), identical TSSOP16 package, same Fm+ interface and interrupt logic. | Supports larger I/O matrices (e.g., 16-key keypads or dual 8-LED banks) without additional devices. | Select when higher channel count is required and PCB layout allows same footprint; pin-compatible but register map differs. |
| PCA9555D,112 | 8-bit I/O, standard Fast-mode I²C (400 kHz), no hardware RESET pin, lower sink current (10 mA/pin). | Suitable for low-speed, low-power applications where interrupt latency <100 µs is not required. | Choose for cost-sensitive consumer electronics where 1 MHz bandwidth and 25 mA drive are unnecessary. |
Compared with PCA9674PW,118, the PCA9672PW,118 offers half the I/O count but identical interrupt response and thermal performance in TSSOP16; versus PCA9555D,112, it delivers 2.5× higher I²C speed and 2.5× stronger LED drive-critical for real-time industrial HMI.
Availability
PCA9672PW,118 is available at Aetrix Electronics and suitable for LED signage control, industrial keypad interfaces, and server rack monitoring requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.
Supply support for PCA9672PW,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 over 50 years of analog and mixed-signal design heritage.
The PCA9672PW,118 belongs to NXP's I²C-bus I/O expander product line, engineered specifically for high-reliability embedded systems needing scalable, low-overhead GPIO expansion with integrated interrupt and reset functionality.
FAQ
What is the maximum I²C clock frequency supported by the PCA9672PW,118?
The PCA9672PW,118 supports Fast-mode Plus (Fm+) I²C operation up to 1 MHz. This is confirmed in the NXP datasheet Rev. 3 (2013), Section 2 "Features and benefits", and enables high-speed LED PWM dimming and responsive keypad scanning. The PCA9672PW,118 maintains full timing compliance-including setup/hold times and rise/fall specifications-at this rate when used with appropriate pull-up resistors and trace lengths.
Does the PCA9672PW,118 require external pull-up resistors on SDA and SCL lines?
Yes, the PCA9672PW,118 requires external pull-up resistors on both SDA and SCL lines, as stated in Section 9 "Characteristics of the I²C-bus" of the datasheet. Its I²C interface uses open-drain outputs, and NXP specifies typical values of 2.2 kΩ for 3.3 V systems and 4.7 kΩ for 5 V systems. No internal pull-ups are integrated on these pins.
How does the interrupt (INT) output of the PCA9672PW,118 behave during I/O state changes?
The INT output of the PCA9672PW,118 is an active LOW open-drain signal that asserts whenever the state of any P0–P7 input differs from its corresponding bit in the input port register. As documented in Section 8.5, it resets to HIGH upon reading the input register, writing to the port, or when the input returns to its prior state-enabling precise edge-triggered notification without spurious pulses.
Can the PCA9672PW,118 drive standard 20 mA LEDs directly without external components?
Yes, the PCA9672PW,118 can drive standard 20 mA LEDs directly. Each of its eight quasi-bidirectional ports provides 25 mA sink capability (Section 2), exceeding the 20 mA requirement. When configured as outputs (write '0'), the internal NMOS transistor pulls the cathode to VSS, while the LED anode connects to VDD through a current-limiting resistor-no external transistor or driver IC is needed.
What are the valid slave address options for the PCA9672PW,118, and how are they set?
The PCA9672PW,118 supports 16 programmable slave addresses determined by AD0 and AD1 pins (Section 7.1). These pins accept four configurations-VSS/VSS, VSS/VDD, VDD/VSS, VDD/VDD-as well as connections to SCL or SDA, yielding address bytes from 20h to 57h (hexadecimal). Table 4 in the datasheet lists all 16 combinations, and no internal pull-ups exist on AD0/AD1, so external termination is mandatory.
PCA9672PW,118 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- -
- Package/Case:
- 16-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Number of I/O:
- 8
- 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:
- 16-TSSOP
PCA9672PW,118 FAQ
1.How can I place an order for PCA9672PW,118 through Aetrix?
Please submit a Request for Quotation (RFQ) for PCA9672PW,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 PCA9672PW,118 reliable?
The price and inventory of PCA9672PW,118 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PCA9672PW,118 is usually 5 days.
3.What payment methods are accepted for PCA9672PW,118?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PCA9672PW,118 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PCA9672PW,118?
PCA9672PW,118 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PCA9672PW,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 PCA9672PW,118?
For technical support, including PCA9672PW,118 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PCA9672PW,118 requirements.
6.How does Aetrix verify that PCA9672PW,118 is sourced from the original manufacturer or authorized distributors?
All PCA9672PW,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 PCA9672PW,118 meets industry standards.
7.What is the process for return or replacement of PCA9672PW,118?
All PCA9672PW,118 units undergo pre-shipment inspection (PSI). If there is an issue with PCA9672PW,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 PCA9672PW,118 part is unused and in its original packaging.
Return procedure for PCA9672PW,118:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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