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NXP Semiconductors PCA9554PW/DG,118
- Part No.:
- PCA9554PW/DG,118
- Manufacturer:
- NXP Semiconductors
- Category:
- I/O Expanders
- Package:
- 16-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
PCA9554PW/DG,118.pdf
- Description:
- IC XPND 400KHZ I2C SMBUS 16TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,588
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Product details
Overview
PCA9554PW/DG,118 from NXP Semiconductors is an 8-bit I²C-bus/SMBus GPIO expander in a 16-pin TSSOP package, providing configurable input/output ports with active-low open-drain interrupt output, 5 V I/O tolerance, and 400 kHz clock support for embedded control applications such as LED drivers, push-button interfaces, and sensor subsystems.
For engineers reviewing the PCA9554PW/DG,118 datasheet, PCA9554PW/DG,118 pinout, PCA9554PW/DG,118 application, or PCA9554PW/DG,118 equivalent, this page delivers verified register-level functionality, I/O configuration behavior, interrupt timing (tv(INT_N) = 4 µs), polarity inversion capability, and TSSOP16 mechanical dimensions per SOT403-1.
Technical Context
The PCA9554PW/DG,118 implements four 8-bit registers-Configuration (R/W), Input Port (read-only), Output Port (R/W), and Polarity Inversion (R/W)-with power-on reset initializing all I/Os as high-impedance inputs with internal 100 kΩ pull-ups. Its interrupt logic activates on input state change when INT is configured as open-drain.
It supports hardware address selection via A0–A2 pins (fixed slave address 0x20 for PCA9554), operates across 2.3 V to 5.5 V, includes noise filtering on SCL/SDA, and complies with I²C standard-mode (100 kHz) and fast-mode (400 kHz) timing requirements per Table 11.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| I²C Address | Fixed 7-bit address 0x20 (0100000b); A0–A2 pins allow up to eight devices on same bus |
| Supply Voltage | 2.3 V to 5.5 V - enables direct interface with 3.3 V and 5 V systems without level shifters |
| I/O Drive | 5 V tolerant inputs/outputs - safe operation with 5 V signals while powered from 3.3 V rail |
| Interrupt Output | Active-low open-drain INT - requires external pull-up; asserts when any input state differs from Input Port register |
| Max Clock Frequency | 400 kHz - supports fast-mode I²C for responsive host polling in real-time control loops |
| Standby Current | 0.25 µA typical at VDD = 5.5 V, VI = VDD - enables low-power battery-backed subsystems |
| ESD Rating | 2000 V HBM, 1000 V CDM - robust handling in manufacturing and field deployment |
Pinout & Package
TSSOP16 package per SOT403-1: plastic thin shrink small outline, 16 leads, body width 4.4 mm, 0.65 mm pitch, exposed pad not present.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Power supply | 2.3 V to 5.5 V main supply; powers internal logic and I/O buffers |
| VSS | Ground | Reference ground for all digital and I/O circuitry |
| SCL | I²C clock input | Accepts standard-mode (100 kHz) or fast-mode (400 kHz) clock; includes noise filter |
| SDA | I²C data bidirectional | Open-drain I²C data line; shares bus with other I²C devices |
| INT | Interrupt output | Active-low open-drain signal; asserts when input state changes differ from Input Port register |
| A0–A2 | Address select inputs | Hardware-configurable bits setting device I²C address (0x20–0x27) |
| IO0–IO7 | Configurable I/O ports | Each independently set as input (high-Z + weak pull-up) or output via Configuration register |
Key Features
| Feature | Design Value |
|---|---|
| Polarity Inversion Register | Per-bit inversion of Input Port register read values - simplifies firmware handling of active-low sensors or switches |
| Individual I/O Configuration | Each of 8 I/Os independently assigned as input or output via Configuration register - eliminates need for external direction control logic |
| No Glitch on Power-Up | Internal power-on reset ensures known default state (all I/Os as inputs) - prevents spurious outputs during system boot |
| 5 V Tolerant I/Os | I/O pins withstand up to 5.5 V regardless of VDD voltage - enables mixed-voltage system interfacing without external translators |
| Noise Filter on SCL/SDA | Input filters suppress spikes ≤50 ns - improves I²C reliability in electrically noisy industrial environments |
Applications
| Industrial Push-Button Panel | LED Status Indicator Array |
|---|---|
Use Scenario: 8 tactile buttons on a factory HMI panel connect directly to PCA9554PW/DG,118 I/Os configured as inputs with internal pull-ups. IC Role / Device Role / Timing Role: GPIO expander providing debounced, interrupt-driven button state reporting over I²C to main controller. Use Value: Reduces host MCU GPIO usage by 8 pins; INT signal eliminates continuous polling; 400 kHz I²C enables sub-millisecond response. | Use Scenario: 8 status LEDs on a network switch management card driven by PCA9554PW/DG,118 outputs. IC Role / Device Role / Timing Role: Parallel output driver translating I²C commands into LED on/off states with 5 V tolerance for common-anode designs. Use Value: Eliminates discrete transistors/drivers; 5 V I/O tolerance allows direct connection to 5 V LED strings; standby current <1 µA extends system sleep time. |
| Temperature Sensor Subsystem | Fan Speed Control Interface |
Use Scenario: PCA9554PW/DG,118 monitors 4 temperature sensor alert lines (active-low) and 4 fault indicators from analog front-end ICs. IC Role / Device Role / Timing Role: Input aggregator with interrupt generation - triggers host only when sensor thresholds are breached. Use Value: Reduces I²C bus traffic by 75% vs. polling; INT assertion time <4 µs ensures timely thermal shutdown response. | Use Scenario: PCA9554PW/DG,118 controls 4 fan enable/disable lines and reads 4 tachometer feedback signals in HVAC controller. IC Role / Device Role / Timing Role: Bidirectional I/O hub managing both control outputs and speed-sense inputs with polarity inversion for active-low tach signals. Use Value: Single-chip solution replaces multiple discrete buffers; polarity register eliminates firmware bit-flipping for tach decoding. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar I²C GPIO expander applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| PCA9554D,118 | SO16 package (SOT162-1), 7.5 mm body width, higher profile than TSSOP16 | Less space-constrained PCBs; no thermal pad; lower thermal performance | Select when board layout favors SOIC footprint or legacy compatibility is required |
| PCA9554APW,118 | Same TSSOP16 package but fixed I²C address 0x38 (0111000b) instead of 0x20 | Enables coexistence with PCA9554PW/DG,118 on same I²C bus without address conflict | Select when expanding I²C node count beyond eight devices using dual-address family |
Compared with PCA9554D,118, PCA9554PW/DG,118 offers 35% smaller PCB area and improved thermal dissipation; compared with PCA9554APW,118, it provides complementary addressing for multi-device bus expansion without software reconfiguration.
Availability
PCA9554PW/DG,118 is available at Aetrix Electronics and suitable for industrial HMI panels, LED status arrays, sensor subsystems, and fan control interfaces requiring stable component supply across extended temperature ranges (−40 °C to +85 °C).
Supply support for PCA9554PW/DG,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.
The PCA9554 product line delivers I²C-based GPIO expansion with enhanced drive strength, 5 V tolerance, and interrupt capability - designed specifically for resource-constrained embedded systems needing reliable peripheral extension.
FAQ
What is the I²C slave address of PCA9554PW/DG,118?
The PCA9554PW/DG,118 has a fixed 7-bit I²C slave address of 0x20 (binary 0100000). Address pins A0–A2 are tied internally and cannot be modified; this distinguishes it from the PCA9554A variant (0x38). The R/W bit is appended during transmission, making the full 8-bit address 0x40 (write) or 0x41 (read).
Does PCA9554PW/DG,118 support 5 V logic levels on its I/O pins when powered from 3.3 V?
Yes, PCA9554PW/DG,118 supports 5 V tolerant I/Os - inputs and outputs operate safely up to 5.5 V regardless of VDD voltage (2.3 V to 5.5 V). This allows direct connection to 5 V sensors or LEDs while the device is powered from a 3.3 V rail, eliminating external level shifters in mixed-voltage designs.
How does the interrupt output (INT) of PCA9554PW/DG,118 behave?
The INT pin on PCA9554PW/DG,118 is an active-low open-drain output that asserts when any input port pin's physical state differs from its corresponding bit in the Input Port register. It de-asserts automatically upon reading the Input Port register or when the input returns to its prior state. An external pull-up resistor is required for proper operation.
Can PCA9554PW/DG,118 drive LEDs directly?
Yes, PCA9554PW/DG,118 can drive LEDs directly when configured as outputs. Each I/O pin supports up to 25 mA sink current (VOL = 0.5 V at VDD = 4.5 V) and the total device sink current is limited to 100 mA. For common-anode LED configurations, use the 5 V tolerant I/Os with external current-limiting resistors referenced to 5 V.
What is the power-on reset behavior of PCA9554PW/DG,118?
At power-on, PCA9554PW/DG,118 performs an internal power-on reset (POR) that initializes all registers to default values: Configuration register sets all I/Os as inputs with weak pull-ups (~100 kΩ), Output Port register defaults to 0xFF, Polarity Inversion register defaults to 0x00, and Input Port register reflects external pin states. POR triggers when VDD rises above VPOR (1.7–2.2 V).
PCA9554PW/DG,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:
- Obsolete
- 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
PCA9554PW/DG,118 FAQ
1.How can I place an order for PCA9554PW/DG,118 through Aetrix?
Please submit a Request for Quotation (RFQ) for PCA9554PW/DG,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 PCA9554PW/DG,118 reliable?
The price and inventory of PCA9554PW/DG,118 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PCA9554PW/DG,118 is usually 5 days.
3.What payment methods are accepted for PCA9554PW/DG,118?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PCA9554PW/DG,118 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PCA9554PW/DG,118?
PCA9554PW/DG,118 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PCA9554PW/DG,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 PCA9554PW/DG,118?
For technical support, including PCA9554PW/DG,118 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PCA9554PW/DG,118 requirements.
6.How does Aetrix verify that PCA9554PW/DG,118 is sourced from the original manufacturer or authorized distributors?
All PCA9554PW/DG,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 PCA9554PW/DG,118 meets industry standards.
7.What is the process for return or replacement of PCA9554PW/DG,118?
All PCA9554PW/DG,118 units undergo pre-shipment inspection (PSI). If there is an issue with PCA9554PW/DG,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 PCA9554PW/DG,118 part is unused and in its original packaging.
Return procedure for PCA9554PW/DG,118:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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