ABE0121

www.DataSheet4U.com ABE0121 Low EMI Spread Spectrum Multiplier Clock FEATURES Spread Spectrum Clock Generator with selectable SST mode. Output frequency ranges: 24MHz to 200MHz. Selectable Center Spread Modulation. TTL/CMOS compatible outputs. 3.3V Operating Voltage. Low short-term jitter. Available in 8-Pin 150mil SOIC. PIN CONFIGURATION FIN S2^ S1^ S0v 1 8 VDD S3^ FOUT GND ABE0121 2 3 4 7 6 5 FIN = 24 ~ 200 Mhz Note: v: 30k Ω Internal Pull down. ^: 30k Ω Internal Pull up. DESCRIPTION The ABE0121 is a Spread Spectrum Clock Generator designed for the purpose of reducing EMI in highspeed digital systems, with selectable Center Spread modulation magnitude (see table below). The device operates over a very wide range of input frequencies and provides a 1x modulated clock output. SST BY-PASS SELECTOR S3 0 1 Spread Spectrum Mode OFF ON (See below) Default Note: S3 has an internal Pull Up. Default=”1” MODULATION MAGNITUDE SELECTION S2 0 0 0 0 1 1 1 1 S1 0 0 1 1 0 0 1 1 S0 0 1 0 1 0 1 0 1 FIN Range (MHz) 24 24 24 24 24 24 24 24 200 200 200 200 200 200 200 200 Spread Spectrum Modulation FOUT X1 X1 X1 X1 X1 X1 X1 X1 Frequency Magnitude ± 0.75% ± 1.00% ± 1.25% ± 0.125% ± 0.25% ± 0.50% ± 0.375% ± 0.625% Fin / 1024 30332 Esperanza., Rancho Santa Margarita, Ca 92688 Ph: 949-546-8000 Fax: 949-546-8001 www.Abracon.com 03/21/05 Page 1 www.DataSheet4U.com ABE0121 Low EMI Spread Spectrum Multiplier Clock BLOCK DIAGRAM FIN PLL SST FOUT S(0:3) Control Logi...