PDF MM54HC162 Data sheet ( Hoja de datos )

Número de pieza	MM54HC162
Descripción	(MM54HC160 - MM54HC163) Synchronous Binary Counter with Asynchronous Clear
Fabricantes	National Semiconductor
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No Preview Available ! January 1992 MM74HC160 Synchronous Decade Counter with Asynchronous Clear MM54HC161 MM74HC161 Synchronous Binary Counter with Asynchronous Clear MM54HC162 MM74HC162 Synchronous Decade Counter with Synchronous Clear MM54HC163 MM74HC163 Synchronous Binary Counter with Synchronous Clear General Description The MM54HC160 MM74HC160 MM54HC161 MM74HC161 MM54HC162 MM74HC162 and MM54HC163 MM74HC163 synchronous presettable count- ers utilize advanced silicon-gate CMOS technology and in- ternal look-ahead carry logic for use in high speed counting applications They offer the high noise immunity and low power consumption inherent to CMOS with speeds similar to low power Schottky TTL The ’HC160 and the ’HC162 are 4 bit decade counters and the ’HC161 and the ’HC163 are 4 bit binary counters All flip-flops are clocked simultaneous- ly on the low to high transition (positive edge) of the CLOCK input waveform These counters may be preset using the LOAD input Pre- setting of all four flip-flops is synchronous to the rising edge of CLOCK When LOAD is held low counting is disabled and the data on the A B C and D inputs is loaded into the counter on the rising edge of CLOCK If the load input is taken high before the positive edge of CLOCK the count operation will be unaffected All of these counters may be cleared by utilizing the CLEAR input The clear function on the MM54HC162 MM74HC162 and MM54HC163 MM74HC163 counters are synchronous to the clock That is the counters are cleared on the posi- tive edge of CLOCK while the clear input is held low The MM54HC160 MM74HC160 and MM54HC161 MM74HC161 counters are cleared asynchronously When the CLEAR is taken low the counter is cleared immediately regardless of the CLOCK Two active high enable inputs (ENP and ENT) and a RIP- PLE CARRY (RC) output are provided to enable easy cas- cading of counters Both ENABLE inputs must be high to count The ENT input also enables the RC output When enabled the RC outputs a positive pulse when the counter overflows This pulse is approximately equal in duration to the high level portion of the QA output The RC output is fed to successive cascaded stages to facilitate easy implemen- tation of N-bit counters All inputs are protected from damage due to static dis- charge by diodes to VCC and ground Features Typical operating frequency 40 MHzY http://www.DataSheet4U.net/ Y Typical propagation delay clock to Q 18 ns Y Low quiescent current 80 mA maximum (74HC Series) Y Low input current 1 mA maximum Y Wide power supply range 2 – 6V Connection Diagram TL F 5008 – 1 Order Number MM54HC161 162 163 or MM74HC160 161 162 163 Truth Tables ’HC160 HC161 CLK CLR ENP ENT Load Function XLXX X Clear XHHL H Count RC disabled XHLH H Count disabled X H L L H Count RC disabled uH X X L Load u H H H H Increment Counter H e high level L e low level uX e don’t care e low to high transition ’HC162 HC163 CLK CLR ENP ENT Load Function uL X X X Clear XHHL H Count RC disabled XHLH H Count disabled X H L L H Count RC disabled uH X X L Load u H H H H Increment Counter C1995 National Semiconductor Corporation TL F 5008 RRD-B30M115 Printed in U S A datasheet pdf - http://www.DataSheet4U.net/ 1 page Logic Waveforms 160 162 Synchronous Decade Counters Typical Clear Preset Count and Inhibit Sequences Sequence (1) Clear outputs to zero (2) Preset to BCD seven (3) Count to eight nine zero one two and three (4) Inhibit TL F 5008 – 4 161 163 Synchronous Binary Counters Typical Clear Preset Count and Inhibit Sequences http://www.DataSheet4U.net/ Sequence (1) Clear outputs to zero (2) Preset to binary twelve (3) Count to thirteen fourteen fifteen zero one and two (4) Inhibit 5 TL F 5008 – 5 datasheet pdf - http://www.DataSheet4U.net/ 5 Page

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Hoja de datos destacado

Número de pieza	Descripción	Fabricantes
MM54HC160	(MM54HC160 - MM54HC163) Synchronous Binary Counter with Asynchronous Clear	National Semiconductor
MM54HC161	(MM54HC160 - MM54HC163) Synchronous Binary Counter with Asynchronous Clear	National Semiconductor
MM54HC162	(MM54HC160 - MM54HC163) Synchronous Binary Counter with Asynchronous Clear	National Semiconductor
MM54HC163	(MM54HC160 - MM54HC163) Synchronous Binary Counter with Asynchronous Clear	National Semiconductor

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