Overview
The PCA9532D,112 is a 16-bit I²C-bus and SMBus I/O expander designed by NXP USA Inc., specifically optimized for dimming LEDs in various applications. This component is particularly suited for Red/Green/Blue (RGB) color mixing and backlight applications. It features an internal oscillator and supports programmable blink rates and duty cycles, allowing for precise control over LED brightness.
Key Specifications
| Specification | Value |
|---|---|
| Package Type | SO24 (plastic small outline package; 24 leads; body width 7.5 mm) |
| Operating Power Supply Voltage | 2.3 V to 5.5 V |
| Operating Temperature Range | -40°C to +85°C |
| Clock Frequency | 0 Hz to 400 kHz |
| LED Brightness Steps | 256 discrete steps |
| Blink Rates/Duty Cycles | Two selectable, fully programmable blink rates (frequency and duty cycle) between 0.591 Hz and 152 Hz |
| Output Current | Up to 25 mA per output |
| ESD Protection | Exceeds 2000 V HBM per JESD22-A114, 150 V MM per JESD22-A115, and 1000 V CDM per JESD22-C101 |
Key Features
- 16-bit I²C-bus and SMBus I/O expander optimized for LED dimming
- 256 discrete brightness steps for RGB color mixing and backlight applications
- Two selectable, fully programmable blink rates and duty cycles
- Internal oscillator requires no external components
- I²C-bus interface logic compatible with SMBus
- Internal power-on reset (POR) and active LOW hardware reset pin
- 16 open-drain outputs directly drive LEDs up to 25 mA
- Controlled edge rates to minimize ground bounce and no glitch on power-up
- Supports hot insertion and low standby current
- Noise filter on SCL/SDA inputs and ESD protection
Applications
- LED dimming and RGB color mixing for various lighting applications
- Backlight control in displays and LCDs
- ACPI power switches, sensors, push-buttons, alarm monitoring, and fan control
- General-purpose I/O expansion for microcontrollers and other systems
Q & A
- What is the PCA9532D,112 used for?
The PCA9532D,112 is used for LED dimming, RGB color mixing, and backlight control in various applications.
- What is the operating voltage range of the PCA9532D,112?
The operating voltage range is from 2.3 V to 5.5 V.
- How many brightness steps does the PCA9532D,112 support?
The PCA9532D,112 supports 256 discrete brightness steps.
- What are the programmable blink rates and duty cycles of the PCA9532D,112?
The PCA9532D,112 has two selectable, fully programmable blink rates and duty cycles between 0.591 Hz and 152 Hz.
- What is the maximum output current per LED driver?
The maximum output current per LED driver is up to 25 mA.
- Does the PCA9532D,112 have internal power-on reset and hardware reset capabilities?
Yes, it has an internal power-on reset (POR) and an active LOW hardware reset pin.
- What types of packages are available for the PCA9532?
The PCA9532 is available in SO24, TSSOP24, and HVQFN24 packages.
- Is the PCA9532D,112 compatible with SMBus?
Yes, the PCA9532D,112 is compatible with SMBus.
- What is the clock frequency range of the PCA9532D,112?
The clock frequency range is from 0 Hz to 400 kHz.
- Does the PCA9532D,112 support hot insertion?
Yes, it supports hot insertion.
