The **ASM3I623S00AG-08-TT** is a specific integrated circuit (IC) primarily used as a **Low EMI Peak Yielding Spread Spectrum Clock Generator**. It is designed to reduce electromagnetic interference (EMI) at the clock source in digital systems. --- ### 1. Key Technical Specifications | Parameter | Specification | | :--- | :--- | | **Function** | Spread Spectrum Clock Generator (SSCG) | | **Operating Voltage** | 3.3V (Typical) | | **Frequency Range** | 20 MHz to 40 MHz (Reference Input) | | **Package Type** | TSSOP-8 (Thin Shrink Small Outline Package) | | **Operating Temperature** | 0°C to +70°C (Commercial Grade) | | **EMI Reduction** | Up to 15dB reduction (depending on modulation) | --- ### 2. Functional Description This electronic component acts as a frequency modulator for system clocks. Instead of a stable, fixed frequency that generates high-energy "spikes" of EMI, it slightly modulates the frequency over a small range (Spread Spectrum). This spreads the energy across a wider bandwidth, lowering the peak radiation. #### Core Features: * **Modulation Rate:** Generally varies based on the input frequency to ensure optimal EMI suppression. * **Input/Output:** Accepts a reference clock or crystal input and provides a modulated output clock. * **Power Down Mode:** Includes features to minimize power consumption when the clock is not required. --- ### 3. Pin Configuration (TSSOP-8) *Typical pinout for this family of devices:* 1. **XIN/CLKIN:** Crystal connection or External reference clock input. 2. **XOUT:** Crystal connection (leave floating if using external clock). 3. **VDD:** Power supply (3.3V). 4. **VSS:** Ground. 5. **ModOUT:** Modulated clock output. 6. **S0:** Selection pin for modulation rate/range. 7. **S1:** Selection pin for modulation rate/range. 8. **PD#:** Power down pin (Active LOW). --- ### 4. Common Applications This part is commonly found in electronics that must pass strict regulatory EMI tests (like FCC or CE) without the use of bulky and expensive metal shielding: * **Printers and Scanners:** Managing high-speed data clocks. * **Digital Displays:** Reducing noise in timing controllers (TCON). * **Embedded Systems:** Microcontroller-based boards where PCB space is limited. * **Consumer Electronics:** Set-top boxes and networking gear. --- ### 5. Part Number Breakdown * **ASM3I:** Series prefix (ON Semiconductor / Alliance). * **623S:** Specific functional logic/modulation type. * **08:** Refers to the pin count (8-pin). * **TT:** Packaging format (Tape & Reel).