器件名称: W245-30HT
功能描述: Frequency Multiplying, Peak Reducing EMI Solution
文件大小: 116.34KB 共12页
简 介:0
W245-30
Frequency Multiplying, Peak Reducing EMI Solution
Features
Cypress PREMIS family offering Generates an EMI optimized clocking signal at the output Selectable output frequency range Single 1.25%, 2.5%, 5% or 10% down or center spread output Integrated loop filter components Operates with a 3.3 or 5V supply Low power CMOS design Available in 20-pin SSOP (Small Shrunk Outline Package)
Key Specifications
Supply Voltages:......................................... VDD = 3.3V±0.3V or VDD = 5V±10% Frequency range: ........................... 13 MHz < Fin < 120 MHz Cycle to Cycle Jitter: .........................................250 ps (max) Output duty cycle: .................................40/60% (worst case)
Simplified Block Diagram
3.3V or 5.0V
Pin Configuration [1, 2]
SSOP
X1 XTAL Input X2
W245-30
SDATA SCLK IIC Interface
Spread Spectrum Output (EMI suppressed)
X1 X2 AVDD MW0^ SDATA OR1^ SCLK GND OR2* SSON#^
1 2 3 4 5 6 7 8 9 10
20 19 18 17 16 15 14 13 12 11
REFOUT VDD GND IR1* IR2* SSOUT MW1* GND VDD MW2^
W245-30
3.3V or 5.0V
Oscillator or Reference Input
X1
W245-30
SDATA IIC Interface SCLK
Spread Spectrum Output (EMI suppressed)
Notes: 1. Pins marked with ^ are internal pull-down resistors with weak 250 k. 2. Pins marked with * are internal pull-up resistors with weak 80 k.
Cypress Semiconductor Corporation Document #: 38-07229 Rev. *B
3901 North First Street
San Jose
CA 95134 408-943-2600 Revised August 13, 2002
W245-30
Pin Desc……
