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NXP Semiconductors PCA9534PW,118
- Part No.:
- PCA9534PW,118
- Manufacturer:
- NXP Semiconductors
- Category:
- I/O Expanders
- Package:
- 16-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
PCA9534PW,118.pdf
- Description:
- IC XPND 400KHZ I2C SMBUS 16TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:7,147
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Product details
Overview
PCA9534PW,118 from NXP Semiconductors is an 8-bit I²C-bus/SMBus GPIO expander in TSSOP16 package, providing configurable input/output ports, polarity inversion, and open-drain interrupt output. It operates from 2.3 V to 5.5 V, tolerates 5 V on I/Os, supports up to 400 kHz clock frequency, and targets low-power embedded control applications such as sensor interfacing and LED/fan management.
For engineers reviewing the PCA9534PW,118 datasheet, PCA9534PW,118 pinout, PCA9534PW,118 application, or PCA9534PW,118 equivalent, this page delivers verified register-level functionality, I²C address configuration (0x20–0x27), interrupt timing (tv(INT_N) = 4 µs), standby current (≤1 µA), and TSSOP16 mechanical dimensions for layout and thermal validation.
Technical Context
The PCA9534PW,118 implements a four-register architecture: Configuration (R/W, sets I/O direction), Input Port (read-only, reflects pin states), Output Port (R/W, controls outputs), and Polarity Inversion (R/W, flips input logic). All registers are accessible via standard I²C write/read sequences using command bytes 0x00–0x03.
Its interrupt output (INT) is active LOW and open-drain, asserting when any configured input changes state relative to its Input Port register value. Address selection uses A0–A2 pins, enabling eight devices on one bus with fixed 7-bit slave address 0b0100xxx (0x20–0x27). Power-on reset initializes all I/Os as inputs and clears registers to default values.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 2.3 V to 5.5 V - supports direct interface with 3.3 V and 5 V systems without level shifters. |
| I/O Voltage Tolerance | 5.5 V max on I/O pins - enables safe connection to 5 V peripherals even when VDD = 3.3 V. |
| Max I²C Clock Frequency | 400 kHz - compatible with Fast-mode I²C, enabling higher throughput than standard 100 kHz mode. |
| Standby Current | ≤1 µA at VDD = 5.5 V, I/O = inputs - critical for battery-powered systems requiring ultra-low quiescent power. |
| Interrupt Response Time | tv(INT_N) = 4 µs - ensures timely notification of input transitions for real-time system response. |
| ESD Protection | 2000 V HBM, 200 V MM, 1000 V CDM - meets industrial handling requirements without external protection. |
| Output Drive Strength | 10 mA sink per I/O at VOL = 0.7 V (VDD = 3.0 V) - sufficient to drive LEDs or small logic loads directly. |
Pinout & Package
TSSOP16 package (SOT403-1): plastic thin shrink small outline, 16 leads, body width 4.4 mm, 0.65 mm pitch, exposed pad not present (unlike HVQFN variants).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0 | Address input 0 | LSB of 3-bit hardware I²C address; sets bit 1 of slave address (0x20–0x27). |
| A1 | Address input 1 | Middle bit of 3-bit hardware I²C address; enables up to eight devices on same bus. |
| A2 | Address input 2 | MSB of 3-bit hardware I²C address; combined with A0/A1 defines unique 7-bit slave address. |
| IO0–IO7 | Configurable I/O port pins | Individually set as input (high-Z) or output via Configuration register; support 5 V tolerant operation. |
| INT | Open-drain interrupt output | Active LOW signal asserted when input state differs from Input Port register; requires external pull-up. |
| SCL | I²C serial clock input | Accepts standard/fast-mode clocks up to 400 kHz; includes internal noise filter for robust timing. |
| SDA | I²C serial data bidirectional line | Open-drain interface with internal noise filter; shares bus with other I²C devices. |
| VDD | Positive supply voltage | Power rail for internal logic and I/O drivers; range 2.3 V–5.5 V. |
| VSS | Ground reference | Return path for all currents; must be connected to system ground plane. |
Key Features
| Feature | Design Value |
|---|---|
| Individual I/O configuration | Each of 8 I/Os independently set as input or output via Configuration register bits C0–C7. |
| Polarity inversion per input | Input Port register data inverted per-bit via Polarity Inversion register (N0–N7), simplifying active-LOW sensor integration. |
| No-glitch power-up behavior | Internal power-on reset ensures all registers initialize to known defaults (I/Os = inputs, outputs = high) before first access. |
| Low EMI SCL/SDA filtering | Integrated noise filters on SCL and SDA reject spikes ≤50 ns, improving bus reliability in noisy environments. |
| 5 V tolerant I/Os without external components | I/O pins withstand up to 5.5 V regardless of VDD level - eliminates need for external level translators in mixed-voltage systems. |
Applications
| Industrial Sensor Hub | LED Status Panel Control |
|---|---|
|
Use Scenario: Centralized monitoring of temperature, humidity, and motion sensors in factory automation cabinets. IC Role / Device Role / Timing Role: GPIO expander provides additional digital inputs for sensor status flags and enables I²C-based polling with interrupt-driven edge detection on change. Use Value: Reduces host MCU GPIO usage by 8 pins while supporting 5 V sensor outputs directly - no level-shifting circuitry required. |
Use Scenario: Driving 8 discrete status LEDs on a network switch front panel with brightness control via PWM from host MCU. IC Role / Device Role / Timing Role: Configured as 8 outputs with 10 mA sink capability per pin; INT unused; I²C commands update LED states synchronously. Use Value: Enables compact TSSOP16 footprint for dense LED arrays and maintains <1 µA standby current during sleep modes. |
| Fan Speed Monitoring Interface | ACPI Power Switch Management |
|
Use Scenario: Reading tachometer signals from 4 cooling fans and controlling 4 enable lines in server power management subsystems. IC Role / Device Role / Timing Role: IO0–IO3 as inputs for fan RPM pulses; IO4–IO7 as outputs driving fan enable MOSFET gates; INT alerts on fan stall. Use Value: Single device handles bidirectional fan control and monitoring, leveraging 400 kHz I²C for responsive updates without MCU overhead. |
Use Scenario: Interfacing mechanical power switches and lid-open sensors to laptop or embedded PC ACPI controllers. IC Role / Device Role / Timing Role: Inputs configured with polarity inversion to match active-LOW switch logic; INT triggers immediate ACPI event on press/release. Use Value: Eliminates need for discrete pull-ups and debounce RC networks - reduces BOM count and PCB area vs. discrete solutions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar GPIO expander applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| PCA9554PW,118 | Includes internal 100 kΩ I/O pull-up resistors; otherwise identical register map and pinout. | Higher quiescent current when I/Os held LOW; unsuitable for ultra-low-power battery applications. | Select PCA9534PW,118 when minimizing standby current is critical; choose PCA9554PW,118 only if pull-ups simplify board design. |
| TCA6408APWR | TI part with same 8-bit I²C GPIO function but different I²C address (0x20–0x27), no polarity inversion register, and 1 µA typical standby current. | Lacks polarity inversion - requires software negation for active-LOW inputs; pin-compatible but register mapping differs. | Use TCA6408APWR only if polarity inversion is unnecessary and TI supply chain preference applies; PCA9534PW,118 offers superior feature parity. |
Compared with PCA9554PW,118, PCA9534PW,118 saves >10 µA standby current by omitting internal pull-ups; versus TCA6408APWR, it provides hardware polarity inversion to reduce firmware overhead in active-LOW sensor interfaces.
Availability
PCA9534PW,118 is available at Aetrix Electronics and suitable for industrial sensor hubs, LED status panels, fan speed monitoring interfaces, and ACPI power switch management requiring stable component supply across extended temperature ranges (−40 °C to +85 °C).
Supply support for PCA9534PW,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 markets.
The PCA9534PW,118 belongs to NXP's I²C-bus I/O expander product line, designed specifically to extend microcontroller GPIO resources in space-constrained, low-power embedded systems with robust industrial-grade electrical specifications.
FAQ
What is the I²C address range supported by PCA9534PW,118?
The PCA9534PW,118 supports eight fixed I²C slave addresses from 0x20 to 0x27, determined by the logic levels on hardware pins A0, A1, and A2. Each combination selects a unique 7-bit address, allowing up to eight PCA9534PW,118 devices on a single I²C bus without address conflict.
Does PCA9534PW,118 require external pull-up resistors on SCL and SDA lines?
Yes, PCA9534PW,118 requires external pull-up resistors on both SCL and SDA lines, as it uses open-drain I²C interface logic. Typical values are 2.2 kΩ to 4.7 kΩ for 100 kHz operation and 1 kΩ to 2.2 kΩ for 400 kHz Fast-mode, depending on bus capacitance and VDD level.
How does the interrupt output (INT) of PCA9534PW,118 behave after being triggered?
The INT pin of PCA9534PW,118 remains asserted (LOW) until the Input Port register is read by the master - this clears the interrupt condition. The pin is open-drain and requires an external pull-up resistor; it de-asserts automatically upon register read, enabling edge-triggered or level-sensitive wake-up schemes.
Can PCA9534PW,118 drive LEDs directly without current-limiting resistors?
No, PCA9534PW,118 cannot drive LEDs without external current-limiting resistors. Its I/O pins support up to 10 mA sink per pin (VOL = 0.7 V at VDD = 3.0 V), but LED forward voltage and desired brightness require series resistors - e.g., 220 Ω for ~10 mA at 3.3 V with red LED.
Is PCA9534PW,118 pin-compatible with PCA9534D,118?
Yes, PCA9534PW,118 is pin-compatible with PCA9534D,118 - both share identical TSSOP16 and SO16 pinouts per Figures 2 and 3 in the datasheet. Functionally identical registers, timing, and electrical specs allow direct substitution where package height or thermal profile permits.
PCA9534PW,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, SMBus
- Interrupt Output:
- Yes
- Features:
- POR
- Output Type:
- Push-Pull
- Current - Output Source/Sink:
- 10mA, 25mA
- Clock Frequency:
- 400 kHz
- Voltage - Supply:
- 2.3V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-TSSOP
PCA9534PW,118 FAQ
1.How can I place an order for PCA9534PW,118 through Aetrix?
Please submit a Request for Quotation (RFQ) for PCA9534PW,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 PCA9534PW,118 reliable?
The price and inventory of PCA9534PW,118 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PCA9534PW,118 is usually 5 days.
3.What payment methods are accepted for PCA9534PW,118?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PCA9534PW,118 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PCA9534PW,118?
PCA9534PW,118 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PCA9534PW,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 PCA9534PW,118?
For technical support, including PCA9534PW,118 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PCA9534PW,118 requirements.
6.How does Aetrix verify that PCA9534PW,118 is sourced from the original manufacturer or authorized distributors?
All PCA9534PW,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 PCA9534PW,118 meets industry standards.
7.What is the process for return or replacement of PCA9534PW,118?
All PCA9534PW,118 units undergo pre-shipment inspection (PSI). If there is an issue with PCA9534PW,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 PCA9534PW,118 part is unused and in its original packaging.
Return procedure for PCA9534PW,118:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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