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LSI/CSI
LS7211N-7212N
U® L LSI Computer Systems, Inc. 1235 Walt Whitman Road, Melville, NY 11747 (631) 271-0400 FAX (631) 271-0405
A3800
PROGRAMMABLE DIGITAL DELAY TIMER
July 2009
FEATURES: • 8-bit programmable delay from microseconds to days • On chip oscillator (RC or Crystal) or external clock time base • Selectable prescaler for real time delay generation based
on 50Hz/60Hz time base or 32,768Hz watch crystal • Four operating modes • Reset input for delay abort • Low quiescent and operating current • Direct relay drive • +3V to +18V operation (VDD - VSS) • LS7211N, LS7212N (DIP); LS7211N-S, LS7212N-S (SOIC)
- See Figure 1 DESCRIPTION: The LS7211N and LS7212N are CMOS integrated circuits for generating digitally programmable delays.