CAT9532HV6I - 16-Bit I2C LED Dimmer I/O Expander | onsemi
N.º de pieza: CAT9532HV6I ✓ Activo| Cant. | Precio unitario | Total |
|---|---|---|
| 1 | $2.18 | $2,18 |
| 10 | $1.96 | $19,60 |
| 100 | $1.71 | $171,00 |
| 500 | $1.49 | $745,00 |
| 1.000 | $1.32 | $1.320,00 |
CAT9532HV6I Descripción general
An LED driver I/O expander is a specialized interface IC that combines a general-purpose I/O port expander with constant-current or constant-voltage LED drive transistors on each bit. Within the broader semiconductor taxonomy, the CAT9532 sits in the LED driver subcategory of power management, with hypernyms: LED driver -> display driver -> power management IC -> semiconductor. The integrated dimming logic offloads PWM generation from the host MCU, reducing firmware complexity and freeing timer resources for other tasks.
Key features include 16 independently controlled LED drivers with 256 brightness levels, two programmable blink rates, hardware address pins that allow up to four devices on the same I2C bus, and a wide operating supply range suitable for 3 V and 5 V systems. The device also functions as a general-purpose 16-bit I/O expander when LED dimming is not required, providing bidirectional GPIOs with interrupt capability.
Architecturally, the CAT9532 integrates CMOS output drivers with a programmable PWM/FSK engine, an I2C-compatible slave interface, and configurable registers per channel. The 4x4 mm TQFN package provides a low thermal-resistance path and supports compact PCB designs for space-constrained backlight, indicator, and RGB lighting modules.
Typical applications include RGB LED backlighting in handheld and industrial displays, status-indicator panels, keypad backlights, decorative color-mixing lighting, and any 3 V/5 V system that needs up to 16 individually dimmed LEDs. Each output can also serve as a standard GPIO when the LED function is disabled, adding flexibility for mixed-signal designs.
When designing with the CAT9532, ensure that the per-channel current setting resistors are chosen based on the LED forward voltage and supply rail. The HVQCCN exposed pad should be soldered to a sufficient copper area for thermal dissipation when multiple channels operate near 25 mA simultaneously.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
Alternativas directas para CAT9532HV6I — mismo encapsulado, compatible pin a pin. Se excluyen las piezas de otro encapsulado que requieren retrabajo de la PCB.
Variantes de esta serie
Modelos de la misma serie compatibles directamente con CAT9532HV6I (mismo factor de forma y huella) — difiere en Package, Interface, Device Type.
Herramienta de comparación rápida — seleccione piezas alternativas para compararlas lado a lado:
CAT9532HV6I-GT2
✅ Sustitución directa✓ En stock
$1 / unidad
Ver hoja de datos →PCA9532BS
✅ Sustitución directa✓ En stock
$1.05 / unidad
Ver hoja de datos →TCA9532
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
CAT9532HV6I-G
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
CAT9534HV4I
✅ Sustitución directa ⚠️ Especificaciones sin verificar📋 Alternativa de referencia (no en el catálogo)
CAT9532HV6I Valores máximos y características eléctricas
| Device Type | 16-bit I/O Port Expander with LED Dimming |
| Número de salidas | 16 |
| Interfaz | I2C / SMBus |
| LED Current per Channel | 25 mA |
| Dimming Steps | 256 brightness levels |
| Blink Rates | 2 programmable |
| Temperatura de funcionamiento | -40 C to +85 C |
| Technology | CMOS |
| Encapsulado | 24-TQFN (HVQCCN) 4x4 mm |
| Tipo de montaje | Surface Mount |
| Nivel MSL | 1 |
| Sin halógenos | Yes |
| BFR Free | Yes |
| Estado RoHS | Compliant |
| Hardware Address Pins | 2 (up to 4 devices on bus) |
Configuración de pines de CAT9532HV6I
| Pin 1 | LED0 — LED output 0 / GPIO bit 0 |
| Pin 2 | LED1 — LED output 1 / GPIO bit 1 |
| Pin 3 | LED2 — LED output 2 / GPIO bit 2 |
| Pin 4 | LED3 — LED output 3 / GPIO bit 3 |
| Pin 5 | LED4 — LED output 4 / GPIO bit 4 |
| Pin 6 | LED5 — LED output 5 / GPIO bit 5 |
| Pin 7 | LED6 — LED output 6 / GPIO bit 6 |
| Pin 8 | LED7 — LED output 7 / GPIO bit 7 |
| Pin 9 | INT — Interrupt output (active low, open-drain) |
| Pin 10 | SCL — I2C serial clock |
| Pin 11 | SDA — I2C serial data |
| Pin 12 | A0 — Hardware address input 0 |
| Pin 13 | A1 — Hardware address input 1 |
| Pin 14 | RESET — Active-low reset input |
| Pin 15 | VSS — Ground |
| Pin 16 | VDD — Positive supply voltage |
| Pin 17 | LED8 — LED output 8 / GPIO bit 8 |
| Pin 18 | LED9 — LED output 9 / GPIO bit 9 |
| Pin 19 | LED10 — LED output 10 / GPIO bit 10 |
| Pin 20 | LED11 — LED output 11 / GPIO bit 11 |
| Pin 21 | LED12 — LED output 12 / GPIO bit 12 |
| Pin 22 | LED13 — LED output 13 / GPIO bit 13 |
| Pin 23 | LED14 — LED output 14 / GPIO bit 14 |
| Pin 24 | LED15 — LED output 15 / GPIO bit 15 |
Aplicaciones típicas
CAT9532HV6I es adecuado para 6 aplicacións: RGB LED Backlighting for Handheld Displays, Industrial Status Indicator Panels, Keypad and Button Backlights, Decorative Color-Mixing Lighting, Automotive Interior LED Lighting, General-Purpose 16-bit I/O Expansion.
RGB LED Backlighting for Handheld Displays
The CAT9532HV6I drives up to 16 LEDs at 25 mA per channel with 256 brightness steps, making it ideal for RGB backlighting in handheld industrial and consumer displays. The 256-step PWM resolution enables smooth color-mixing transitions without visible flicker, while the I2C interface keeps the host MCU free of timer interrupts. Placed near the LCD module with per-LED series resistors sized for the chosen LED forward voltage, the CAT9532HV6I provides a compact, firmware-light solution for backlight dimming and color-mixing. The 24-TQFN 4x4 mm package fits beneath the display bezel.
Recomendado
Industrial Status Indicator Panels
The CAT9532HV6I's 16 outputs and industrial -40 to +85 C temperature range suit it to multi-LED status-indicator panels in factory automation and process-control equipment. Each LED can be independently dimmed or blinked at one of two programmable rates, providing clear visual feedback for alarms, status, and operator notifications. Two hardware address pins let four CAT9532HV6I devices share one I2C bus, controlling up to 64 LEDs from a single MCU. The 24-TQFN package withstands typical industrial thermal cycling and supports standard reflow profiles.
Recomendado
Keypad and Button Backlights
For capacitive or mechanical keypad backlights, the CAT9532HV6I provides per-key LED dimming with 256 brightness steps for uniform illumination under varying ambient light. The interrupt-on-change feature on unused GPIO inputs can wake the host when a key event occurs, sharing the I2C bus with the dimming function to reduce pin count. With up to four devices on the bus, a 64-key backlit keypad matrix is achievable from one MCU I2C peripheral, simplifying layout and firmware. The 24-TQFN 4x4 mm footprint fits beneath dense keypad assemblies.
Recomendado
Decorative Color-Mixing Lighting
The CAT9532HV6I's 256-step dimming resolution and I2C control make it well suited for decorative color-mixing fixtures using RGB or RGBW LED arrays. Designers can store up to 256 brightness levels per channel in firmware-driven look-up tables, then stream dimming values over I2C for smooth color fades and breathing effects without host-side PWM. With 16 channels per chip and four chips per bus, a single MCU can orchestrate 64-channel fixtures. The compact 24-TQFN 4x4 mm package fits into space-constrained lamp enclosures.
Recomendado
Automotive Interior LED Lighting
For non-safety interior LED lighting such as footwell, door-panel, and ambient mood lighting, the CAT9532HV6I provides 16 dimmable outputs that interface directly to the vehicle's I2C bus. The -40 to +85 C operating range covers cabin temperatures, and the RoHS-compliant 24-TQFN 4x4 mm package is suitable for typical automotive PCB assemblies. For safety-critical or under-hood AEC-Q100 requirements, onsemi offers qualified variants within the same family footprint. Each channel drives indicator-class LEDs at up to 25 mA with smooth PWM dimming.
Recomendado
General-Purpose 16-bit I/O Expansion
When LED dimming is not needed, the CAT9532HV6I serves as a versatile 16-bit bidirectional GPIO expander with interrupt-on-change capability. The I2C interface adds up to 16 inputs or outputs to a host MCU with limited pin count - useful in sensor hubs, control panels, and mixed-signal embedded designs. The same 24-TQFN 4x4 mm footprint keeps layout identical whether the design uses LED mode or GPIO mode, providing design reuse. The two hardware address pins allow four devices per bus for 64 total GPIOs from one MCU peripheral.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para CAT9532HV6I — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | CAT9532HV6I-GT2 | PCA9532BS | TCA9532 | CAT9532HV6I-G | CAT9534HV4I |
|---|---|---|---|---|---|---|
| Package | 24-TQFN (HVQCCN) 4x4 mm | 24-TQFN (HVQCCN) 4x4 mm - same | 24-TQFN 4x4 mm - same | 24-TQFN (RTW) 4x4 mm - same | 24-TQFN 4x4 mm - same | 24-TQFN 4x4 mm - same |
| Brand | onsemi | onsemi | NXP Semiconductors | Texas Instruments | onsemi | onsemi |
| Number of LED Outputs | 16 | 16 | 16 | 16 | 16 | 8 (different family) |
| LED Current per Channel | 25 mA | 25 mA | 25 mA | 25 mA | 25 mA | 25 mA |
| Dimming Steps | 256 | 256 | 256 | 256 | 256 | 256 |
| Interface | I2C / SMBus | I2C / SMBus | I2C / SMBus | I2C / SMBus | I2C / SMBus | I2C / SMBus |
| Hardware Address Pins | 2 (4 devices/bus) | 2 (4 devices/bus) | 2 (4 devices/bus) | 2 (4 devices/bus) | 2 (4 devices/bus) | 2 (4 devices/bus) |
| Operating Temperature | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C |
Diferenciadores clave
- Industry-standard 16-channel LED dimmer I/O expander with broad cross-brand second-source support (frente a Discrete MCU PWM + MOSFET approach)
- Drop-in pin compatibility with NXP PCA9532 and TI TCA9532 in same 24-TQFN 4x4 mm package (frente a NXP PCA9532BS)
- Industrial -40 to +85 C operating range in halogen-free / RoHS-compliant 24-TQFN (frente a Commercial-grade LED driver ICs)
Notas de diseño
When all 16 CAT9532HV6I outputs drive 25 mA simultaneously, total package dissipation approaches 0.6 W at 1.5 V LED forward drop plus driver losses. The 24-TQFN 4x4 mm HVQCCN package has a low thermal resistance to the exposed die pad; solder this pad to a copper pour of at least 25 mm^2 on the top or bottom PCB layer to keep junction temperature within the -40 to +85 C range. For full-load operation above +60 C ambient, derate to 20 mA per channel.
Place the I2C pull-up resistors (typically 4.7 kohm at 3.3 V or 3.3 kohm at 5 V) close to the CAT9532HV6I SDA and SCL pins. Decouple VDD with a 0.1 uF ceramic capacitor placed within 3 mm of pin 16, plus a bulk 1 uF capacitor for noise immunity. Series resistors on each LED output sized for (VDD - Vf_LED) / 25 mA ensure uniform brightness across channels.
Do not exceed the absolute maximum LED current of 25 mA per channel; doing so risks permanent damage to the open-drain output transistors. The INT pin is open-drain and requires a pull-up resistor to VDD. A0 and A1 hardware address inputs must be tied to either VSS or VDD - leaving them floating can cause intermittent I2C addressing errors. Always issue a software reset (or assert RESET pin low for >1 us) after power-up before writing to configuration registers.
Información de cumplimiento
RoHS compliant, halogen-free, BFR-free per onsemi CAT9532 product page. Industrial temperature grade -40 to +85 C. Not AEC-Q100 qualified; for safety-critical automotive applications use onsemi automotive-qualified variants within the same family.
