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LSI/CSI
UL
®
LS7211-7212
(631) 271-0400 FAX (631) 271-0405
June 1997
LSI Computer Systems, Inc. 1235 Walt Whitman Road, Melville, NY 11747
A3800
PROGRAMMABLE DIGITAL DELAY TIMER
FEATURES: • 8-bit programmable delay from nanoseconds 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 32.768KHz watch crystal • Four operating modes • Reset input for delay abort • Low quiescent and operating current • Direct relay drive • +4V to +18V operation (VDD-VSS) • LS7211/LS7212 (DIP), LS7211-S/LS7212-S (SOIC)-See Figure 1 DESCRIPTION: The LS7211/LS7212 are monolithic CMOS integrated circuits for generating digitally programmable delays.