器件名称: PLL701-31SI
功能描述: Low EMI Spread Spectrum Multiplier Clock
文件大小: 201.6KB 共5页
简 介:PLL701-31
Low EMI Spread Spectrum Multiplier Clock
FEATURE
Spread Spectrum Clock Generator with 1x outputs. Output frequency ranges: 10MHz to 30MHz. Accepts input from crystal or reference clock. Selectable Center, Down or Asymmetric Spread Modulation. Selectable Modulation magnitude. TTL/CMOS compatible outputs. 3.0V (+/-10%) Supply Voltage. Low short-term jitter. Available in 8-Pin 150mil SOIC.
PIN CONFIGURATION
XIN/FIN XOUT/SD*^ SC0^ SC1^ 1 8 VDD SC2^ FOUT GND
PLL701-31
2 3 4
7 6 5
XIN/FIN = 10 ~ 30 MHz
Note: ^: Internal pull-up resistor (120k for SD, 30 k for SC0-SC2). *: The value of SD is latched upon power-up. The internal pull-up resistor results in a default high value when no pull-down resistor is connected to this pin (recommended external pull-down resistor of 27 k ).
DESCRIPTION
The PLL701-31 is a Spread Spectrum Clock Generator designed to reduce EMI in high-speed digital systems. The device is designed to operate from a crystal or reference clock input and provides a 1x modulated clock output. Center, Down and Asymmetric spread types are selectable as well as the modulation magnitude.
OUTPUT CLOCK SELECTION
SST Modulation SD
0 1 1 1 1 1 0 0 0 0
SC2
1 0 0 1 1 1 0 0 0 0
SC1
1 0 1 0 0 1 0 0 1 1
SC0 Magnitude
0 1 0 0 1 0 0 1 0 1 3.75% 3.50% 3.75% 3.25% 3.50% 3.75% 3.25% 3.50% 3.75% 0.00% Fin / 512
Freq.
D D A D A A C C C
Type
-3.75% -3.50% +0.125%, -3.625% -3.25% +0.125%, -3.375% +0.25%, -3.5% +/-1.625 % +/-1.75% +/-1.875% SST OFF
Notes: A:……
