Overview
The PCA9554PW is an 8-bit I2C and SMBus I/O expander produced by Texas Instruments. This device is designed to provide general-purpose remote I/O expansion for microcontroller families via the I2C interface. It operates within a power supply voltage range of 2.3 to 5.5 volts, making it versatile for various applications. The PCA9554PW is packaged in a 16-pin TSSOP (Thin Shrink Small Outline Package) and is RoHS compliant, ensuring environmental sustainability.
Key Specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Part Number | PCA9554PW |
| Package | 16-TSSOP |
| Number of Pins | 16 |
| Length | 5 mm |
| Width | 4.4 mm |
| Height | 1.2 mm |
| Operating Temperature | -40°C to 85°C |
| Supply Voltage | 2.3 V to 5.5 V |
| Clock Frequency | Up to 400 kHz |
| Number of I/Os | 8 |
| Output Type | PUSH-PULL |
| Interrupt Output | Yes, Active-LOW |
| Supply Current (Operating Mode) | 104 µA (typical at 5.5 V) |
| Standby Current | 50 µA (typical at 5.5 V) |
| ESD Protection | 2000 V HBM, 200 V MM, 1000 V CDM |
| RoHS Status | Compliant |
Key Features
- Operating power supply voltage range of 2.3 to 5.5 V
- 5 V tolerant I/Os
- Polarity inversion register for active-HIGH or active-LOW operation
- Active-LOW interrupt output
- Low stand-by current
- Noise filter on SCL/SDA inputs
- No glitch on power-up
- Internal power-on reset
- 8 I/O pins configurable as inputs or outputs
- High-current drive capability for directly driving LEDs
- ESD protection exceeding 2000 V HBM, 200 V MM, and 1000 V CDM
- Latch-up testing exceeds 100 mA per JESDEC Standard JESD78
Applications
The PCA9554PW is suitable for a variety of applications where additional I/O is required. These include:
- ACPI power switches
- Sensors
- Pushbuttons
- LEDs
- Fans
- General-purpose I/O expansion for microcontrollers
Q & A
- What is the operating voltage range of the PCA9554PW?
The PCA9554PW operates within a power supply voltage range of 2.3 to 5.5 volts.
- What is the package type of the PCA9554PW?
The PCA9554PW is packaged in a 16-pin TSSOP (Thin Shrink Small Outline Package).
- How many I/O pins does the PCA9554PW have?
The PCA9554PW has 8 I/O pins that can be configured as either inputs or outputs.
- What is the clock frequency of the PCA9554PW?
The PCA9554PW supports clock frequencies up to 400 kHz.
- Does the PCA9554PW have an interrupt output?
Yes, the PCA9554PW has an active-LOW interrupt output.
- What is the typical supply current of the PCA9554PW in operating mode?
The typical supply current in operating mode is 104 µA at 5.5 V.
- Is the PCA9554PW RoHS compliant?
Yes, the PCA9554PW is RoHS compliant.
- What kind of ESD protection does the PCA9554PW have?
The PCA9554PW has ESD protection exceeding 2000 V HBM, 200 V MM, and 1000 V CDM.
- Can multiple PCA9554PW devices share the same I2C bus?
Yes, up to eight PCA9554 and eight PCA9554A devices can share the same I2C/SMBus due to their different fixed I2C addresses.
- What is the purpose of the polarity inversion register in the PCA9554PW?
The polarity inversion register allows for the polarity of the input port to be inverted, enabling active-HIGH or active-LOW operation.
