CY29972AXI Cypress Semiconductor Corp, CY29972AXI Datasheet - Page 4

• Manufacturer Part Number: CY29972AXI
• Description: IC CLK ZDB 12OUT 125MHZ 52TQFP
• Manufacturer: Cypress Semiconductor Corp
• Type: Fanout Distribution, Multiplexer , Spread Spectrum Clock Generator, Zero Delay Bufferr

Specifications of CY29972AXI

• Number Of Circuits: 1
• Package / Case: 52-TQFP
• Pll: Yes with Bypass
• Input: Clock, Crystal
• Output: Clock
• Ratio - Input:output: 4:12
• Differential - Input:output: No/No
• Frequency - Max: 125MHz
• Divider/multiplier: Yes/No
• Voltage - Supply: 2.9 V ~ 3.6 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Frequency-max: 125MHz
• Maximum Input Frequency: 480 MHz
• Minimum Input Frequency: 200 MHz
• Output Frequency Range: 125 MHz
• Supply Voltage (max): 3.6 V
• Supply Voltage (min): 2.9 V
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Mounting Style: SMD/SMT
• Operating Supply Voltage: 3.3 V
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant
• Other names: 428-2236; CY29972AXI

Document #: 38-07290 Rev. *C
SYNC Output
In situations where output frequency relationships are not
integer multiples of each other, the SYNC output provides a
signal for system synchronization. The CY29972 monitors the
relationship between the QA and QC output clocks. It provides
a LOW-going pulse, one period in duration, one period prior to
the coincident rising edges of the QA and QC outputs. The
SYNC
SYNC
SYNC
SYNC
SYNC
SYNC
SYNC
VCO
QC
QC
QC
QC
QC
QC
QC
QA
QA
QA
QA
QA
QA
QA
Figure 1. Timing Diagram
duration and placement of the pulse depend on the higher of
the QA and QC output frequencies. The following timing
diagram illustrates various waveforms for the SYNC output.
Note that the SYNC output is defined for all possible combina-
tions of QA and QC outputs, even though under some relation-
ships the lower frequency clock could be used as a synchro-
nizing signal.
1:1 Mode
2:1 Mode
3:1 Mode
3:2 Mode
4:1 Mode
4:3 Mode
6:1 Mode
CY29972
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