1FEATURES

2• One Crystal/LVCMOS Reference Input

Including 24.8832 MHz, 25 MHz, and

26.5625 MHz

• Input Frequency Range: 21.875 MHz to

28.47 MHz

• On-Chip VCO Operates in Frequency Range of

1.75 GHz to 2.05 GHz

• 2x Output Available:

– Pin-Selectable Between LVPECL, LVDS, or

2-LVCMOS; Operates at 3.3 V

• LVCMOS Bypass Output Available

• Output Frequency Selectable by /1, /2, /3, /4, /6,

/8 from a Single Output Divider

• Supports Common LVPECL/LVDS Output Frequencies:

– 62.5 MHz, 74.25 MHz, 75 MHz, 77.76 MHz,

100 MHz, 106.25 MHz, 125 MHz, 150 MHz,

155.52 MHz, 156.25 MHz, 159.375 MHz, 187.5 MHz, 200 MHz, 212.5 MHz, 250 MHz,

311.04 MHz, 312.5 MHz, 622.08 MHz,

625 MHz

• Supports Common LVCMOS Output

Frequencies:

– 62.5 MHz, 74.25 MHz, 75 MHz, 77.76 MHz,

100 MHz, 106.25 MHz, 125 MHz, 150 MHz,

155.52 MHz, 156.25 MHz, 159.375 MHz,

187.5 MHz, 200 MHz, 212.5 MHz, 250 MHz

• Output Frequency Range: 43.75 MHz to

683.264 MHz (See Table 3)

• Internal PLL Loop Bandwidth: 400 kHz

• High-Performance PLL Core:

– Phase Noise typically at –146 dBc/Hz at

5-MHz Offset for 625-MHz LVPECL Output

– Random Jitter typically at 0.509 ps, RMS

(10 kHz to 20 MHz) for 625-MHz LVPECL

Output

• Output Duty Cycle Corrected to 50% (± 5%)

• Low Output Skew of 20 ps on LVPECL Outputs

• Divider Programming Using Control Pins:

– Two Pins for Prescaler/Feedback Divider

– Three Pins for Output Divider

– Two Pins for Output Select

• Chip Enable Control Pin Available

• 3.3-V Core and I/O Power Supply

• Industrial Temperature Range: –40°C to +85°C

• 5-mm × 5-mm, 32-pin, QFN (RHB) Package

• ESD Protection Exceeds 2 kV (HBM)

APPLICATIONS

• Low Jitter Clock Driver for High-End Datacom

Applications Including SONET, Ethernet, Fibre Channel, Serial ATA, and HDTV

• Cost-Effective High-Frequency Crystal Oscillator Replacement

DESCRIPTION

The CDCM61002 is a highly versatile, low-jitter

frequency synthesizer that can generate two low-jitter

clock outputs, selectable between low-voltage

positive emitter coupled logic (LVPECL), low-voltage

differential signaling (LVDS), or low-voltage

complementary metal oxide semiconductor

(LVCMOS) outputs, from a low-frequency crystal or

LVCMOS input for a variety of wireline and data communication applications. The CDCM61002

features an onboard PLL that can be easily

configured solely through control pins. The overall

output random jitter performance is less than 1ps,

RMS (from 10 kHz to 20 MHz), making this device a

perfect choice for use in demanding applications such

as SONET, Ethernet, Fibre Channel, and SAN. The

CDCM61002 is available in a small, 32-pin, 5-mm ×

5-mm QFN package.