U6431B-MY Microchip Integrated Circuit (Dual-In-Line Packages) In Stock
Microchip U6431B-MY is an LED flasher driver IC in a dual-in-line package, providing automatic LED blinking control with built-in oscillator and current regulation for single or multi-LED indicator applications. It eliminates external RC oscillator components for compact circuit designs. Available from stock worldwide with fast shipping.
- Manufacturer
- Microchip
- Package
- Dual-In-Line Packages
- Pin Count
- 8
- Lifecycle
- ACTIVE
- Datasheet
- U6431B-MY Datasheet PDF
- Category
- Integrated Circuit
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Integrated oscillator generates automatic LED flash cadence without external resistor-capacitor timing components
- Built-in current regulation protects LEDs from overcurrent across supply voltage variations from 3 V to 18 V
- Dual-in-line package enables breadboard prototyping and through-hole PCB assembly for indicator and status light designs
Applications
The U6431B-MY is used in status indicator circuits, alarm panels, and consumer electronics where a single LED or small LED array must flash automatically without microcontroller overhead. Its built-in oscillator and current driver allow direct LED connection from a 3 V to 18 V supply, making it practical for battery-powered portable devices and 12 V automotive indicator modules. Engineers use it in fault indicator boards, power-on LED signaling, and low-cost alarm systems where simplicity and minimal BOM count are priorities.
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for U6431B-MY:
suggested
suggested
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Frequently Asked Questions
Does the U6431B-MY require external timing components to set the LED flash rate, or is the oscillator fully internal?
The U6431B-MY integrates a fully internal oscillator that sets the LED flash cadence without any external resistors or capacitors. This reduces the surrounding circuit to just the LED, a current-limiting path, and a supply bypass capacitor, saving 2 to 3 passive components per flasher channel and simplifying PCB layout for compact indicator designs.
Over what supply voltage range can U6431B-MY drive LEDs, and how does internal current regulation help?
The U6431B-MY operates across a supply voltage range of approximately 3 V to 18 V. Its integrated current regulation maintains a stable LED drive current across this range, preventing LED damage or brightness variation when the supply drops during battery discharge or fluctuates on a 12 V vehicle electrical system, eliminating the need for a separate current-limiting resistor calculation at each voltage point.
For a simple 12 V alarm panel indicator, when would U6431B-MY be chosen over a microcontroller-driven LED output?
When a 12 V alarm panel needs only a flashing LED status indicator with no logic processing, the U6431B-MY handles the task with a single 8-pin DIP device drawing less than 5 mA quiescent current, compared to a microcontroller that would add 10 mA to 50 mA idle current, firmware development time, and a larger PCB footprint. For dedicated single-LED or dual-LED flasher channels, U6431B-MY provides a cost-effective and immediate solution.
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