W530-02 Datasheet, PDF (1/8 Pages) Cypress Semiconductor – Frequency-multiplying, Peak-reducing EMI Solution

W530-02
Frequency-multiplying, Peak-reducing
EMI Solution
Features
• Cypress PREMIS™ SMARTSPREAD™ family offering
• Generates an electromagnetic-interference
(EMI)-optimized clocking signal at the output
• Selectable frequency range and multiplication factor
• Single 1.25%, 2.5%, 5%, or 10%, down or center spread
output
• Integrated loop filter components
• Operates with a 3.3V or 5V supply
• Low-power CMOS design
• Higher drive strength, higher frequency support than
W530
• Available in 20-pin SSOP
Key Specifications
Supply Voltages:....................................... V_DD = 3.3V ± 0.3V
or V_DD = 5V ± 10%
Frequency Range:......................... 13 MHz ≤ F_out ≤ 166 MHz
Cycle to Cycle Jitter: ........................................250 ps (max.)
Output Duty Cycle: ............................... 40/60% (worst case)
Table 1. Output Frequency Range Selection
OR OR
21
Output Range
(Multiplication Factor Selection)
00
01
10
11
reserved
13 MHz ≤ F_OUT ≤ 30 MHz
25 MHz ≤ F_OUT ≤ 60 MHz
50 MHz ≤ F_OUT ≤ 166 MHz
Table 2. Modulation Width Selection
MW2 MW1 MW0
Output
0
0
0
0
0
1
F_in ≥ F_out ≥ F_in –1.25%
F_avg + 0.625% ≥ F_out ≥ F_avg –
0.625%
0
1
0
F_in ≥ F_out ≥ F_in – 2.5%
0
1
1 F_avg + 1.25% ≥ F_out ≥ F_avg – 1.25%
1
0
0
F_in ≥ F_out ≥ F_in – 5%
1
0
1
F_avg + 2.5% ≥ F_out ≥ F_avg – 2.5%
1
1
0
F_in ≥ F_out ≥ F_in – 10%
1
1
1
F_avg + 5% ≥ F_out ≥ F_avg – 5%
Table 3. Input Frequency Range Selection
IR2
IR1
Input Range
0
0
reserved
0
1
1
0
1
1
13 MHz ≤ F_IN ≤ 30 MHz
25 MHz ≤ F_IN ≤ 60 MHz
50 MHz ≤ F_IN ≤ 166 MHz
Cypress Semiconductor Corporation • 3901 North First Street • San Jose, CA 95134 • 408-943-2600
Document #: 38-07190 Rev. *A
Revised January 7, 2003