AD9550

Integer-N Clock Translator for Wireline Communications AD9550 FEATURES Converts preset standard input frequencies to standard output frequencies Input frequencies from 8 kHz to 200 MHz Output frequencies up to 810 MHz LVPECL and LVDS (200 MHz CMOS) Preset pin-programmable frequency translation ratios On-chip VCO Single-ended CMOS reference input Two output clocks (independently programmable as LVDS, LVPECL, or CMOS) Single supply (3.3 V) Very low power: <450 mW (under most conditions) Small package size (5 mm × 5 mm) Exceeds Telcordia GR-253-CORE jitter generation, transfer and tolerance specifications BASIC BLOCK DIAGRAM REF PLL OUTPUT CIRCUITRY OUT2 OUT1 PIN DECODER 09057-001 AD9550 Figure 1. APPLICATIONS Cost effective replacement of high frequency VCXO, OCXO, and SAW resonators Flexible frequency translation for wireline applications such as Ethernet, T1/E1, SONET/SDH, GPON, xDSL Wireless infrastructure Test and measurement (including handheld devices) www.DataSheet.net/ GENERAL DESCRIPTION The AD9550 is a phase-locked loop (PLL) based clock translator designed to address the needs of wireline communication and base station applications. The device employs an integer-N PLL to accommodate the applicable frequency translation requirements. It accepts a single-ended input reference signal at the REF input. The AD9550 is pin programmable, providing a matrix of standard input/output frequency translations from a list of 15 possible input frequencies to a list of 52 ...