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Product Detailed Parameters
- Description：IC LED DRIVER LINEAR 25MA 24SOIC
- Series：-
- Mfr：onsemi
- Package：Tape & Reel (TR)
- Type：Linear
- Topology：-
- Internal Switch(s)：Yes
- Number of Outputs：16
- Voltage - Supply (Min)：2.3V
- Voltage - Supply (Max)：5.5V
- Voltage - Output：-
- Current - Output / Channel：25mA
- Frequency：400Hz
- Dimming：-
- Applications：-
- Operating Temperature：-40°C ~ 85°C (TA)
- Mounting Type：Surface Mount
- Package / Case：24-SOIC (0.295", 7.50mm Width)
- Supplier Device Package：24-SOIC
- Grade：-
- Qualification：-
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Overview
The CAT9552WI-T1 is a 16-channel LED driver and I/O expander manufactured by onsemi. It operates via an I2C/SMBus interface with a maximum clock frequency of 400 kHz. The device supports a supply voltage range of 2.3 V to 5.5 V and features open-drain outputs capable of sourcing up to 25 mA per channel. It includes internal programmable timers for blinking functions, adjustable from 0.02 to 5.8 seconds, and operates within a temperature range of -40°C to +85°C.
Feature Summary
- Integrates 16-channel LED driving capabilities with I/O expansion functionality
- Features internal oscillators and programmable timers for independent flashing modes
- Supports standard I2C and SMBus communication protocols
Applications
- Advertising point-of-sale signage with flashing LEDs
- Consumer equipment requiring on/off LED indicators
- Industrial equipment with status indication requirements
Procurement Notes
Verify the specific suffix 'T1' against official datasheets to confirm tape-and-reel packaging specifications. Confirm that the 'WI' designation aligns with the required industrial temperature range and package type. Cross-reference the manufacturer part number with current obsolescence notices or lifecycle notifications to ensure long-term availability for production.
Selection Notes
Select this component when a single IC must manage both general-purpose I/O expansion and direct LED control without external microcontrollers. It is suitable for designs requiring programmable blink rates to reduce bus traffic. Ensure the system voltage falls within the 2.3 V to 5.5 V range and that the I2C/SMBus interface matches the host controller capabilities.
Part Context
This part belongs to the Catalyst Semiconductor line acquired by onsemi, focusing on bus-based peripheral expansion. It complements other I/O expanders like the CAT9554 and CAT9555 series but adds dedicated LED driving hardware. The device simplifies board design by combining logic expansion with display control in a compact SOIC package.
Replacement Considerations
Check for CAT9552 variants with different suffixes such as 'YI-T2' which may share functional compatibility but differ in packaging or lifecycle status. Verify pinout and register compatibility before substituting with other 16-channel I2C LED drivers from the same family.
