CAT9532 Datasheet | onsemi

16-bit Programmable LED Dimmer with I2C Interface Description 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 patible 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 mand to program the Blink Rate 1 and Blink Rate 2 (frequency and duty cycle), only one mand 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 m A. The total current sunk by all I/Os must not exceed 400 m A. Features - 16 LED Drivers with Dimming Control - 256 Brightness Steps - 16 Open Drain Outputs Drive 25 m A Each - 2 Selectable Programmable Blink Rates: - Frequency: 0.593 Hz to 152 Hz - Duty Cycle: 0% to 99.6% - I/Os can be Used as GPIOs - 400 k Hz I2C Bus patible - 2.3 V to 5.5 V Operation - 5 V Tolerant I/Os - Active Low Reset Input - 24- Lead TSSOP and 24- pad TQFN (4 x 4 mm) Packages - These Devices are Pb- Free, Halogen Free/BFR Free and are Ro HS pliant Applications - Backlighting - RGB Color Mixing - Sensors Control - Power Switches, Push- buttons - Alarm Systems .onsemi. TSSOP- 24 Y SUFFIX CASE 948AR TQFN- 24 HV6 SUFFIX CASE 510AG ORDERING INFORMATION See detailed ordering and shipping information in the package dimensions section on page 14 of this data sheet. © Semiconductor ponents Industries, LLC,...