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Analog Devices AD9549ABCPZ-REEL7 — Clock & Timing ICs

AD9549ABCPZ-REEL7 Clock Generator/Synchronizer, 725 MHz

MPNAD9549ABCPZ-REEL7
End of Life

Analog Devices AD9549ABCPZ-REEL7, PLL clock generator/synchronizer, 725 MHz max, CMOS/LVDS/LVPECL inputs, CMOS/HSTL outputs, 64-LFCSP-VQ (9x9), -40°C to 85°C, ROHS3 compliant.

$27.31Ref. price · indicative, final on quote
Packaging64-VFQFN Exposed Pad, CSP
RoHSROHS3 Compliant
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

AD9549ABCPZ-REEL7 specifications
ParameterValue
MountingSurface Mount
Voltage1.71V ~ 3.465V
Frequency725MHz
Operating temperature-40°C ~ 85°C
PLLYes
InputCMOS, LVDS, LVPECL
OutputCMOS, HSTL
PackageTape & Reel (TR); Cut Tape (CT)
Main purposeEthernet, SONET/SDH, Stratum
Case64-VFQFN Exposed Pad, CSP
Number of circuits1
Ratio - Input:Output2:2
Differential - Input:OutputYes/Yes

Product details

What this PLL clock generator does for your timing chain

The Analog Devices AD9549ABCPZ-REEL7 is a single-circuit PLL clock generator and synchronizer built for Ethernet, SONET/SDH, and Stratum timing applications. It accepts CMOS, LVDS, or LVPECL reference inputs and delivers CMOS or HSTL outputs, with a 2:2 input-to-output ratio and fully differential signal paths on both sides.

725 MHz max frequency — what it buys you

The 725 MHz ceiling on the output covers 10GbE and OC-192 line rates with margin. If your design needs a 622.08 MHz or 644.53125 MHz clock for a SONET/SDH framer or a Stratum-3E holdover oscillator, this PLL synthesizes it directly without an external VCXO multiplier stage. The differential output (HSTL or CMOS) keeps jitter low enough for the SERDES reference on most mid-range FPGAs.

Package and thermal: 64-LFCSP with exposed pad

Surface-mount only; no through-hole option.

The part can be designed into new builds without planning for an end-of-life migration.

Frequently asked questions

What is the difference between AD9549ABCPZ and AD9549ABCPZ-REEL7?

The AD9549ABCPZ ships in tray packaging; the AD9549ABCPZ-REEL7 ships on a 7-inch reel (Tape & Reel). The silicon, package, and electrical ratings are identical.

What is the AD9549 used for?

The AD9549 is a clock generator and synchronizer designed for Ethernet, SONET/SDH, and Stratum timing applications. It generates and cleans up reference clocks for network line cards, base stations, and test equipment requiring hitless reference switching or holdover.

How does AD9549ABCPZ-REEL7 compare to AD9524BCPZ-REEL7?

The AD9524BCPZ-REEL7 is a similar PLL clock generator but offers a 1 GHz max frequency (vs 725 MHz) and 2:6 input-to-output ratio (vs 2:2). It also adds LVDS and LVPECL output options beyond the AD9549's CMOS/HSTL. If you need more output fanout or higher frequency, the AD9524 is the step-up; if your design only requires two HSTL or CMOS outputs at up to 725 MHz, the AD9549 is the cost-effective fit.