CAT9532HV6I - 16-Bit I2C LED Dimmer I/O Expander | onsemi
Référence : CAT9532HV6I ✓ Actif| Qté | Prix unitaire | 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 Présentation
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.
Alternatives de remplacement direct pour CAT9532HV6I — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
Variantes de cette série
Modèles de la même série directement compatibles avec CAT9532HV6I (même facteur de forme et même empreinte) — différant par Package, Interface, Device Type.
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
CAT9532HV6I-GT2
✅ Remplacement direct✓ En stock
$1 / unité
Voir la fiche technique →PCA9532BS
✅ Remplacement direct✓ En stock
$1.05 / unité
Voir la fiche technique →TCA9532
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
CAT9532HV6I-G
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
CAT9534HV4I
✅ Remplacement direct ⚠️ Spécifications non vérifiées📋 Alternative de référence (hors catalogue)
CAT9532HV6I Valeurs maximales et caractéristiques électriques
| Device Type | 16-bit I/O Port Expander with LED Dimming |
| Nombre de sorties | 16 |
| Interface | I2C / SMBus |
| LED Current per Channel | 25 mA |
| Dimming Steps | 256 brightness levels |
| Blink Rates | 2 programmable |
| Température de fonctionnement | -40 C to +85 C |
| Technology | CMOS |
| Boîtier | 24-TQFN (HVQCCN) 4x4 mm |
| Type de montage | Surface Mount |
| Niveau MSL | 1 |
| Sans halogène | Yes |
| BFR Free | Yes |
| Statut RoHS | Compliant |
| Hardware Address Pins | 2 (up to 4 devices on bus) |
Configuration des broches de CAT9532HV6I
| Broche 1 | LED0 — LED output 0 / GPIO bit 0 |
| Broche 2 | LED1 — LED output 1 / GPIO bit 1 |
| Broche 3 | LED2 — LED output 2 / GPIO bit 2 |
| Broche 4 | LED3 — LED output 3 / GPIO bit 3 |
| Broche 5 | LED4 — LED output 4 / GPIO bit 4 |
| Broche 6 | LED5 — LED output 5 / GPIO bit 5 |
| Broche 7 | LED6 — LED output 6 / GPIO bit 6 |
| Broche 8 | LED7 — LED output 7 / GPIO bit 7 |
| Broche 9 | INT — Interrupt output (active low, open-drain) |
| Broche 10 | SCL — I2C serial clock |
| Broche 11 | SDA — I2C serial data |
| Broche 12 | A0 — Hardware address input 0 |
| Broche 13 | A1 — Hardware address input 1 |
| Broche 14 | RESET — Active-low reset input |
| Broche 15 | VSS — Ground |
| Broche 16 | VDD — Positive supply voltage |
| Broche 17 | LED8 — LED output 8 / GPIO bit 8 |
| Broche 18 | LED9 — LED output 9 / GPIO bit 9 |
| Broche 19 | LED10 — LED output 10 / GPIO bit 10 |
| Broche 20 | LED11 — LED output 11 / GPIO bit 11 |
| Broche 21 | LED12 — LED output 12 / GPIO bit 12 |
| Broche 22 | LED13 — LED output 13 / GPIO bit 13 |
| Broche 23 | LED14 — LED output 14 / GPIO bit 14 |
| Broche 24 | LED15 — LED output 15 / GPIO bit 15 |
Applications typiques
CAT9532HV6I convient pour 6 applications: 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.
Recommandé
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.
Recommandé
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.
Recommandé
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.
Recommandé
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.
Recommandé
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.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour CAT9532HV6I — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | 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 |
Principaux différenciateurs
- Industry-standard 16-channel LED dimmer I/O expander with broad cross-brand second-source support (vs Discrete MCU PWM + MOSFET approach)
- Drop-in pin compatibility with NXP PCA9532 and TI TCA9532 in same 24-TQFN 4x4 mm package (vs NXP PCA9532BS)
- Industrial -40 to +85 C operating range in halogen-free / RoHS-compliant 24-TQFN (vs Commercial-grade LED driver ICs)
Notes de conception
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.
Informations de conformité
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.
