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LS7166

24-BIT QUADRATURE COUNTER

GENERALDESCRIPTION: TheLS7166isaCMOS,24-bitcounterthatcanbeprogrammedtooperateinseveraldifferentmodes.Theoperatingmodeissetupbywritingcontrolwordsintointernalcontrolregisters(seeFigure8).Therearethree6-bitandone2-bitcontrolregistersforsettinguptheci

LS7166

24-BIT QUADRATURE COUNTER

LS7166

24-BIT QUADRATURE COUNTER;

LS7166-S

24-BIT QUADRATURE COUNTER;

GENERAL DESCRIPTION:\nThe LS7166 is a CMOS, 24-bit counter that can be programmed to operate in several different modes. The operating mode is set up by writing control words into internal control registers (see Figure 8). There are three 6-bit and one 2-bit control registers for setting up the circuit functional characteristics. In addition to the control registers, there is a 5-bit output status register (OSR) that indicates the current counter status. The IC communicates with external circuits through an 8-bit three state I/O bus. Control and data words are written into the LS7166 through the bus. In addition to the I/O bus, there are a number of discrete inputs and outputs to facilitate instantaneous hardware based control functions and instantaneous status indication.FEATURES:\n? Programmable modes are: Up/Down,\n?? Binary, BCD, 24 Hour Clock, Divide-by-N,\n?? x1 or x2 or x4 Quadrature and Single-Cycle.\n? DC to 25MHz Count Frequency.\n? 8-Bit I/O Bus for uP Communication and Control.\n? 24-Bit comparator for pre-set count comparison.\n? Readable status register.\n? Input/Output TTL and CMOS compatible.\n? 3V to 5.5V operation (VDD - VSS).\n? LS7166 (DIP); LS7166-S (SOIC);\n?? LS7166-TS24 (24-Pin TSSOP) - See Figure 1 -

LS7166_06

24-BIT QUADRATURE COUNTER

LS7166_08

24-BIT QUADRATURE COUNTER

LS7166-TS24

24-bit quadrature counter;