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NXP Semiconductors PCA9674BS,118
- Part No.:
- PCA9674BS,118
- Manufacturer:
- NXP Semiconductors
- Category:
- I/O Expanders
- Package:
- 16-VFQFN Exposed Pad
- Datasheet:
-
PCA9674BS,118.pdf
- Description:
- IC XPNDR 1MHZ I2C 16HVQFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,625
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Product details
Overview
PCA9674BS,118 from NXP Semiconductors is an 8-bit quasi-bidirectional I/O expander for Fast-mode Plus (Fm+) I²C-bus, operating from 2.3 V to 5.5 V with 1 MHz bus support, 25 mA per port sink capability for direct LED driving, and active-low open-drain interrupt output. It enables remote GPIO expansion in space-constrained industrial and mobile systems.
For engineers reviewing the PCA9674BS,118 datasheet, PCA9674BS,118 pinout, PCA9674BS,118 application, or PCA9674BS,118 equivalent, key selection factors include its HVQFN16 package, 64 programmable slave addresses, 4.5 µA static current, latch-up immunity (>100 mA), and compatibility with Fm+ I²C-bus timing and drive strength requirements.
Technical Context
The PCA9674BS,118 implements a single-register quasi-bidirectional I/O architecture-no direction register required-where each of P0–P7 operates as input or output based on write value and external loading. Its internal 100 µA weak pull-up and strong sink transistor enable direct LED control without external components.
It features Fast-mode Plus I²C interface with 30 mA SDA sink capability for 4000 pF buses, software reset via General Call address (00h) + data byte 06h, and read-only Device ID (manufacturer: NXP, part ID: 001001011, revision: 000) accessible at reserved address F8h.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| I²C Bus Speed | 1 MHz Fast-mode Plus (Fm+) - supports high-speed communication without bus buffers on loaded lines up to 4000 pF. |
| Supply Voltage Range | 2.3 V to 5.5 V - operates across wide rail range with 5.5 V-tolerant I/Os referenced to VDD. |
| Quasi-bidirectional I/Os | 8 pins (P0–P7), each with 25 mA sink capability - directly drives LEDs without external drivers or current-limiting transistors. |
| Interrupt Output | Active-low open-drain INT - signals microcontroller on any input state change, eliminating polling overhead. |
| Static Current | 4.5 µA typical - enables ultra-low-power operation in battery-powered mobile and portable devices. |
| Slave Address Options | 64 unique addresses via AD0/AD1/AD2 - allows up to 126 expanders (64 PCA9674 + 62 PCA9674A) on one I²C bus. |
| Operating Temperature | −40 °C to +85 °C - qualified for industrial and embedded environments without derating. |
Pinout & Package
HVQFN16 (SOT758-1) package: 3 mm × 3 mm × 0.85 mm body, exposed thermal pad, leadless design optimized for thermal dissipation and PCB area efficiency.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| P0–P7 | Quasi-bidirectional I/O ports | Each independently configurable as input (weak 100 µA pull-up) or output (25 mA sink); no direction register needed. |
| INT | Active-low open-drain interrupt | Asserted when any input state differs from port register - enables event-driven host response instead of polling. |
| SCL | I²C serial clock input | Accepts 1 MHz Fm+ clock; synchronized internally for register access and interrupt generation. |
| SDA | I²C bidirectional data line | 30 mA sink capability supports heavy capacitive loads (up to 4000 pF) without bus buffers. |
| AD0–AD2 | Hardware slave address inputs | Three pins decode 64 distinct 7-bit addresses; accept VDD/VSS/SCL/SDA logic levels for extended addressing. |
| VDD | Positive supply | 2.3 V to 5.5 V; powers internal logic and I/O structures; I/Os are 5.5 V tolerant when held to VDD. |
| VSS | Ground reference | Must be connected to system ground; HVQFN16 die ground connects to both VSS pin and exposed center pad. |
Key Features
| Feature | Design Value |
|---|---|
| Single-register quasi-bidirectional I/O | Eliminates direction register overhead and simplifies firmware - same register controls input sampling and output driving. |
| Fm+ I²C interface with 30 mA SDA sink | Enables reliable communication on long traces or multi-drop buses without external bus repeaters or level shifters. |
| Software Reset via General Call | Restores all registers to power-on defaults (inputs with 100 µA pull-up) using standardized I²C sequence: START + 00h + 06h + STOP. |
| Read-only Device ID | Provides traceable identification (NXP manufacturer code, part ID 001001011, revision 000) for automated BOM verification and firmware validation. |
| ESD and latch-up robustness | 2000 V HBM / 1000 V CDM ESD rating and >100 mA latch-up immunity per JEDEC JESD78 - suitable for harsh industrial environments. |
Applications
| LED Signage Control | Industrial Keypad Interface |
|---|---|
Use Scenario: Driving 8-segment alphanumeric displays and status indicators in outdoor LED signs with variable ambient temperature. IC Role / Device Role / Timing Role: Remote I/O expander providing direct 25 mA sink per segment, synchronized via 1 MHz Fm+ I²C to reduce MCU GPIO usage and simplify routing. Use Value: Eliminates discrete transistor arrays and reduces PCB layer count; low 4.5 µA standby current extends sign controller battery life during off-hours. | Use Scenario: Scanning mechanical keypads in PLC operator panels with ESD-prone industrial environments. IC Role / Device Role / Timing Role: Quasi-bidirectional port monitoring key closures while providing noise-immune interrupt signaling to main controller. Use Value: Active-low INT pin reduces host polling frequency by >95%; built-in 2000 V HBM protection prevents field failures from electrostatic discharge. |
| Server Fan Monitoring | Medical Device Status Indication |
Use Scenario: Reading tachometer feedback and fault flags from multiple cooling fans in rack-mounted servers. IC Role / Device Role / Timing Role: Input monitor for fan RPM pulses and over-temperature alerts, with interrupt-driven status reporting over shared I²C bus. Use Value: 64-address flexibility allows daisy-chaining up to 126 expanders per bus - scales to 1008 monitored points without bus contention. | Use Scenario: Controlling status LEDs and reading safety interlock switches in portable diagnostic equipment. IC Role / Device Role / Timing Role: Dual-role I/O managing LED indicators (output) and door-open sensors (input) within tight 3×3 mm board space. Use Value: HVQFN16 package saves >60% footprint vs SO16; −40 °C to +85 °C rating ensures reliability during sterilization cycles and field deployment. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar I/O expansion applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| PCA9674D,512 | SO16 package (7.5 mm width), same electrical specs and pinout mapping, but larger footprint and lower thermal performance. | Preferred where manual assembly, legacy PCB tooling, or through-hole compatibility is required. | Select PCA9674D,512 only if HVQFN reflow capability is unavailable; identical register map and firmware compatibility. |
| PCA9674PW,118 | TSSOP16 package (4.4 mm width), same functionality and timing, but 0.65 mm pitch requires finer trace routing than HVQFN16. | Used when thermal pad soldering is not feasible but space constraints exceed SO16 limits. | Choose PCA9674PW,118 when board-level thermal management is less critical than component height; full functional equivalence maintained. |
Compared with PCA9674D,512 and PCA9674PW,118, the PCA9674BS,118 delivers superior thermal dissipation via its exposed pad and smallest PCB footprint (3×3 mm), making it optimal for compact, high-density industrial and medical modules where heat and space are constrained.
Availability
PCA9674BS,118 is available at Aetrix Electronics and suitable for LED signage control, industrial keypad interfaces, and server fan monitoring requiring stable component supply and guaranteed long-term manufacturability.
Supply support for PCA9674BS,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 company headquartered in Eindhoven, Netherlands, specializing in secure connectivity solutions for automotive, industrial, and IoT applications.
The PCA9674 product line delivers remote I/O expansion for Fast-mode Plus I²C-bus systems, designed specifically for space-constrained, low-power industrial and medical devices requiring robust interrupt-driven peripheral control.
FAQ
What is the maximum I²C bus speed supported by the PCA9674BS,118?
The PCA9674BS,118 supports Fast-mode Plus (Fm+) I²C operation up to 1 MHz. This is confirmed in the NXP datasheet Rev. 7 (May 2013), Section 1 "General description", and enables high-throughput GPIO expansion without bus buffering on capacitively loaded lines up to 4000 pF. The PCA9674BS,118 achieves this via enhanced SDA sink capability (30 mA) and optimized internal timing.
Does the PCA9674BS,118 require external pull-up resistors on its I/O pins?
No - the PCA9674BS,118 includes an internal 100 µA weak pull-up current source on each quasi-bidirectional I/O (P0–P7) that activates at power-on. External pull-ups are unnecessary for basic input operation, though may be added for stronger pull-up strength or specific voltage translation. The PCA9674BS,118 datasheet explicitly states these internal sources hold pins HIGH unless actively driven LOW.
How does the interrupt output (INT) of the PCA9674BS,118 function?
The PCA9674BS,118 features an active-low open-drain INT pin that asserts when any input port state differs from its corresponding register value - indicating a change in external signal (e.g., keypress or sensor transition). It remains asserted until the host reads the input register, enabling efficient event-driven polling. This behavior is documented in Section 1 and Figure 1 of the PCA9674BS,118 datasheet.
Can the PCA9674BS,118 drive LEDs directly without external components?
Yes - each of the eight I/O pins (P0–P7) on the PCA9674BS,118 provides 25 mA sink capability, sufficient to drive standard LEDs directly when connected anode-to-VDD with appropriate current-limiting resistors. The total package sink capability is 200 mA. This is specified in Section 2 "Features and benefits" and validated in the absolute maximum ratings table of the PCA9674BS,118 datasheet.
What package type is used for the PCA9674BS,118?
The PCA9674BS,118 uses the HVQFN16 (SOT758-1) package: a 3 mm × 3 mm × 0.85 mm thermally enhanced, leadless quad flat no-lead package with an exposed center pad. This is confirmed in Table 1 "Ordering information" of the PCA9674BS,118 datasheet, where "HVQFN16" is explicitly listed as the package name for type number PCA9674BS.
PCA9674BS,118 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- -
- Package/Case:
- 16-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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-HVQFN (3x3)
PCA9674BS,118 FAQ
1.How can I place an order for PCA9674BS,118 through Aetrix?
Please submit a Request for Quotation (RFQ) for PCA9674BS,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 PCA9674BS,118 reliable?
The price and inventory of PCA9674BS,118 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PCA9674BS,118 is usually 5 days.
3.What payment methods are accepted for PCA9674BS,118?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PCA9674BS,118 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PCA9674BS,118?
PCA9674BS,118 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PCA9674BS,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 PCA9674BS,118?
For technical support, including PCA9674BS,118 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PCA9674BS,118 requirements.
6.How does Aetrix verify that PCA9674BS,118 is sourced from the original manufacturer or authorized distributors?
All PCA9674BS,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 PCA9674BS,118 meets industry standards.
7.What is the process for return or replacement of PCA9674BS,118?
All PCA9674BS,118 units undergo pre-shipment inspection (PSI). If there is an issue with PCA9674BS,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 PCA9674BS,118 part is unused and in its original packaging.
Return procedure for PCA9674BS,118:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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