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Product Detailed Parameters
- Description：IC XPNDR 400KHZ I2C SMBUS 16TQFN
- Series：-
- Mfr：onsemi
- Package：Tape & Reel (TR),Bulk
- Number of I/O：8
- Interface：I2C, SMBus
- Interrupt Output：Yes
- Features：POR
- Output Type：Push-Pull
- Current - Output Source/Sink：10mA, 24mA
- Clock Frequency：400 kHz
- Voltage - Supply：2.3V ~ 5.5V
- Operating Temperature：-40°C ~ 85°C
- Mounting Type：Surface Mount
- Package / Case：16-WQFN Exposed Pad
- Supplier Device Package：16-TQFN (4x4)
- Grade：-
- Qualification：-
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Overview
The CAT9554HV4I-GT2 is an I/O expander from the CAT9554 series, manufactured by onsemi. It provides eight bidirectional general-purpose digital input/output ports accessible via an I2C or SMBus serial interface. The device operates within a supply voltage range of 2.3 V to 5.5 V and supports clock frequencies up to 400 kHz. It features interrupt output capabilities and is housed in a TQFN-16 surface-mount package. The component is designed for industrial temperature ranges, functioning between -40°C and +85°C, with a maximum power dissipation of 1 W.
Feature Summary
- Supports I2C and SMBus communication protocols for system integration
- Provides eight configurable bidirectional I/O lines
- Includes interrupt output functionality for event monitoring
Applications
- Embedded systems requiring additional GPIO expansion
- Industrial control interfaces utilizing I2C/SMBus buses
- Consumer electronics with limited microcontroller pins
Procurement Notes
This component is officially listed as End-of-Life (EOL) by the manufacturer. Distribution availability is restricted, with some suppliers indicating no sales in specific regions. Verification of current stock status and authenticity through authorized channels is essential due to the discontinued lifecycle stage.
Selection Notes
Designers should consider the TQFN-16 package dimensions and thermal characteristics when planning PCB layouts. The operating voltage range accommodates both 3.3 V and 5 V logic systems. Ensure that the target application requires only eight I/O lines, as this model does not offer higher density options within the same footprint.
Part Context
The CAT9554HV4I-GT2 belongs to the CAT9554 family of I/O expanders. This series typically includes variants with different packaging options such as TSSOP and SOIC. The HV4 suffix likely denotes specific electrical or packaging characteristics defined by onsemi for this particular part number within the broader product line.
Replacement Considerations
Publicly confirmed substitute part numbers are not available in the provided documentation. Due to the EOL status, alternative sourcing may require checking distributor inventories for remaining stock or evaluating pin-compatible alternatives from other manufacturers after verifying technical specifications.
