SY89538LHH Micrel Inc, SY89538LHH Datasheet - Page 17

• Manufacturer Part Number: SY89538LHH
• Description: IC SYNTHESIZR LVPECL/LVDS 64TQFP
• Manufacturer: Micrel Inc
• Series: Precision Edge®r
• Type: Clock Synthesizer/Fanout Bufferr

Specifications of SY89538LHH

• Pll: Yes
• Input: CMOS, HSTL, LVDS, LVPECL, LVTTL, SSTL, Crystal
• Output: LVDS, LVPECL
• Number Of Circuits: 1
• Ratio - Input:output: 2:7
• Differential - Input:output: Yes/Yes
• Frequency - Max: 756MHz
• Divider/multiplier: Yes/No
• Voltage - Supply: 2.375 V ~ 3.6 V
• Operating Temperature: 0°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 64-TQFP Exposed Pad, 64-eTQFP, 64-HTQFP, 64-VQFP
• Frequency-max: 756MHz
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Synchronization
The SYNC control input is used to synchronize all
divider outputs of the post divider. When a HIGH-LOW
transition is applied to the SYNC control input the
outputs are disabled when all post-divider outputs are
LOW, see “Output Synchronization Controlled by
June 2006
Output Synchronization Controlled by SYNC Timing Diagram
17
SYNC Timing Diagram” for details. Once SYNC is
asserted with a rising edge, the outputs are enabled
when all internal divider stages are reaching their
LOW state. This ensures a simultaneous switching of
all outputs with the next LOW-HIGH transition of the
pre-divider clock.
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