AD9549 Rev. 0 is a dual input network clock generator/synchronizer with flexible reference inputs, auto/manual holdover modes, and switchover modes. It also features excellent stability in holdover mode and a high-speed digitally controlled oscillator (DCO) core DDS.
The AD9549 is a dual‑input network clock generator and synchronizer that provides flexible reference inputs, loss‑of‑reference indicators, and automatic or manual holdover and switchover modes. It supports input frequencies from 8 kHz to 750 MHz and offers both HSTL and CMOS output drivers with programmable dividers and a digitally controlled oscillator core.
The document includes a full description of the device architecture, pin configuration, digital loop filter settings, holdover operation, and absolute maximum ratings. It also provides detailed DC and AC specifications, power consumption data, and guidelines for ESD protection and thermal performance.
| Input Frequency Range | 8 kHz – 750 MHz |
|---|---|
| Operating Temperature Range | -40 °C to +85 °C |
| Typical DVDD Supply Voltage | 1.80 V |
| Total Power Dissipation (All Blocks Running) | Typical 1250 mW |
| Package Type | 64‑lead LFCSP |
The device operates from –40 °C to +85 °C.
It accepts input frequencies from 8 kHz up to 750 MHz.
Typical power dissipation is about 1250 mW.
The AD9549 is supplied in a 64‑lead LFCSP package.