CAT9532: I/O Port Expander, I2C / SMBus, 16-Bit, with LED Dimming
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The CAT9532 is a CMOS device that provides 16-bit parallel input/output port expander optimized for LED dimming control. The CAT9532 outputs can drive directly 16 LEDs in parallel. Each individual LED may be turned ON, OFF, or blinking at one of two programmable rates. The device provides a simple solution for dimming LEDs in 256 brightness steps for backlight and color mixing applications. The CAT9532 is suitable in I2C and SMBus compatible applications where it is necessary to limit the bus traffic or free-up the bus master's timer.
The CAT9532 contains an internal oscillator and two PWM signals that drive the LED outputs. The user can program the period and duty cycle for each individual PWM signal. After the initial set-up command to program the Blink Rate 1 and Blink Rate 2 (frequency and duty cycle), only one command from the bus master is required to turn each individual open drain output ON, OFF, or cycle at Blink Rate 1 or Blink Rate 2. Each open drain LED output can provide a maximum output current of 25 mA. The total current sunk by all I/Os must not exceed 200 mA.
The CAT9532 contains an internal oscillator and two PWM signals that drive the LED outputs. The user can program the period and duty cycle for each individual PWM signal. After the initial set-up command to program the Blink Rate 1 and Blink Rate 2 (frequency and duty cycle), only one command from the bus master is required to turn each individual open drain output ON, OFF, or cycle at Blink Rate 1 or Blink Rate 2. Each open drain LED output can provide a maximum output current of 25 mA. The total current sunk by all I/Os must not exceed 200 mA.
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Technical Documentation & Design Resources
Software (1) | Package Drawings (2) |
Tutorials (1) | Videos (1) |
Data Sheets (1) | Evaluation Board Documents (3) |
Evaluation/Development Tool Information
Product | Status | Compliance | Short Description | Action | |
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STR-4LED-SOL-EVAL-EVK | Active |
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Strata Enabled LED Evaluation Board with Buck, Boost, PWM and Linear Solutions |
Avnet (2020-08-19) | : | 2 |
Availability & Samples
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Specifications
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Case Outlines
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Application Diagram
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Intaractive Block Diagram
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Case Outline |
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CAT9532HV6I-GT2 | Active |
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CAT9532 | TQFN-24 | 510AG | 1 | 260 | Tape and Reel | 2000 | $1.3333 | ||||||||
CAT9532YI-T2 | Active |
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CAT9532 | TSSOP-24 | 948AR | 1 | 260 | Tape and Reel | 2000 | $1.2666 |
Market Leadtime (weeks) | : | 4 to 8 |
FutureElectronics (2020-08-19 00:00) | : | >10K |
Market Leadtime (weeks) | : | 4 to 8 |
ON Semiconductor (2020-09-02 00:00) | : | 8,000 |
Product
Description
Pricing ($/Unit)
Compliance
Status
I/O
Cascadable
VCC Min (V)
VCC Max (V)
Interrupt Output
I/O Pullups
LED Blink/PWM
IO Min (mA)
Package Type
Application
Diagram - Block
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