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W42C32-05MG Datasheet

  • W42C32-05MG

  • Miscellaneous Clock Generator

  • 8頁(yè)

  • ETC

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2-05M
W42C32-05M
Spread Spectrum Frequency Timing Generator
Features
鈥?Maximized EMI suppression using Cypress鈥檚 Spread
Spectrum technology
鈥?Generates a spread spectrum timing signal
鈥?Reduces measured EMI by as much as 12 dB
鈥?Integrated loop filter components
鈥?Requires a single low-cost fundamental crystal (or
other frequency reference) for proper operation
鈥?Special spread spectrum control functions
鈥?Low-power CMOS design
鈥?Power-down mode reduces current consumption and
disables the clock outputs
鈥?Available in 16-pin SOIC package (300 mil)
Key Specifications
Cycle-to-Cycle Jitter .................................................... 250 ps
45/55 Duty Cycle .................................... approximately 1.4V
Selectable Frequency spread
2 ns rise/fall time 0.4V to 2.0V, 3.3V supply
2 ns rise/fall time 0.8V to 2.4V, 5.0V supply
Table 1. Frequency Spread Selection
W42C32-05M
FS2
0
0
FS1
0
0
1
1
0
0
1
1
FS0
0
1
0
1
0
1
0
1
14.318
REFOUT
(MHz)
22.1148
22.1148
14.7456
18.432
14.318
CLKOUT
(MHz)
44.2296 鹵
2.5%
44.2296
鹵1.5%
29.4912 鹵
2.5%
18.432 鹵 2.5%
66.66 鈥?2%
Reserved
100 鈥?2%
Reserved
VDD
(V)
5.0
5.0
5.0
5.0
3.3
3.3
3.3
3.3
Overview
The W42C32-05M modulates the output of a single PLL in
order to 鈥榮pread鈥?the bandwidth of a synthesized clock and,
more importantly, decrease the peak amplitudes of its funda-
mental harmonics. Since peak amplitudes are reduced, the
radiated electromagnetic emissions of the W42C32-05M are
significantly lower than the typical narrow band signal pro-
duced by oscillators and most frequency generators. Lowering
a signal鈥檚 amplitude by increasing its bandwidth is a method of
reducing EMI called 鈥榮pread spectrum frequency timing gen-
eration鈥? This patented technique not only reduces the emis-
sions of the primary clock, but also impacts every signal syn-
chronized to it.
0
0
1
1
1
1
Pin Configuration
SOIC
PD#
X1
X2
GND
AGND
FS0
TEST
CLKOUT
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
REFOUT
FS2
FS1
SSON#
RESET
VDD
AVDD
REFEN#
W42C32-05M
Cypress Semiconductor Corporation
鈥?/div>
3901 North First Street
鈥?/div>
San Jose
鈥?/div>
CA 95134 鈥?/div>
408-943-2600
January 5, 2001, rev. **

W42C32-05MG相關(guān)型號(hào)PDF文件下載

  • 型號(hào)
    版本
    描述
    廠商
    下載
  • 英文版
    Specialty Clock Generator
    Cypress
  • 英文版
    Spread Spectrum Frequency Timing Generator
    CYPRESS
  • 英文版
    Spread Spectrum Frequency Timing Generator
    CYPRESS [C...
  • 英文版
    Spread Spectrum Frequency Timing Generator
    CYPRESS [C...
  • 英文版
    Spread Spectrum Frequency Timing Generator
    CYPRESS [C...
  • 英文版
    Spread Spectrum Frequency Timing Generator
    CYPRESS [C...
  • 英文版
    Spread Spectrum Frequency Timing Generator
    CYPRESS
  • 英文版
    Spread Spectrum Frequency Timing Generator
    CYPRESS [C...
  • 英文版
    Spread Spectrum Frequency Timing Generator
    CYPRESS [C...
  • 英文版
    Spread Spectrum Frequency Timing Generator
    CYPRESS
  • 英文版
    Spread Spectrum Frequency Timing Generator
    CYPRESS [C...
  • 英文版
    Spread Spectrum Frequency Timing Generator
    CYPRESS
  • 英文版
    Spread Spectrum Frequency Timing Generator
    CYPRESS [C...
  • 英文版
    Spread Spectrum Frequency Timing Generator
    CYPRESS
  • 英文版
    Spread Spectrum Frequency Timing Generator
    CYPRESS [C...
  • 英文版
    Spread Spectrum Frequency Timing Generator
    CYPRESS
  • 英文版
    Spread Spectrum Frequency Timing Generator
    CYPRESS [C...
  • 英文版
    Spread Spectrum Frequency Timing Generator
    Cypress
  • 英文版
    Clock Driver
    ETC
  • 英文版
    IC CLK EMI REDUCTION SSCG 8-SOIC
    Cypress Semiconductor

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