The P2681A is a versatile spread spectrum frequency modulator designed specifically for digital camera and other digital video and imaging applications. It reduces electromagnetic interference (EMI) at the clock source, which provides system wide reduction of EMI of all clock dependent signals.
The P2681A is a spread‑spectrum frequency modulator intended for digital video, camera, MFP, xDSL, fax modem, set‑top box, USB controller and other embedded applications. It reduces EMI at the clock source by spreading the clock spectrum, providing up to 15 dB of attenuation while maintaining low jitter and zero‑cycle slip at low spread percentages.
The device operates from 3.3 V or 5.0 V supplies, supports input frequencies from 6 MHz to 20 MHz, and offers a divide‑by‑two output mode for frequencies as low as 3 MHz. It is available in 8‑pin SOIC and 8‑pin TSSOP packages, with detailed pin functions, electrical characteristics, and ordering codes provided in the datasheet.
| Operating voltage range | 3.3 V to 5.0 V |
|---|---|
| Output frequency range | 6 MHz to 20 MHz |
| Spread percentage options | +/-0.4% to +/-5.0% |
| Maximum output drive current | 10 mA |
| Storage temperature range | -65 °C to +125 °C |
| Dynamic supply current | 3 µA to 15 µA |
| Package types | 8‑pin SOIC and 8‑pin TSSOP |
The device can be powered from either 3.3 V or 5.0 V supplies.
The spread can be set between +/-0.4% and +/-5.0%, with specific steps such as +/-0.75% and +/-1.30% selectable via the SRO pin.
The IC is offered in an 8‑pin SOIC package and an 8‑pin TSSOP package.