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SL74HC161D 데이터시트(PDF) 1 Page - System Logic Semiconductor |
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1 / 9 page SL74HC161 System Logic Semiconductor SLS Presettable Counters High-Performance Silicon-Gate CMOS The SL74HC161 is identical in pinout to the LS/ALS161. The device inputs are compatible with standard CMOS outputs; with pullup resistors, they are compatible with LS/ALSTTL outputs. The SL74HC161 is programmable 4-bit synchronous counter that feature parallel Load, asynchronous Reset, a Carry Output for cascading and count-enable controls. The SL74HC161 is binary counter with asynchronous Reset. • Outputs Directly Interface to CMOS, NMOS, and TTL • Operating Voltage Range: 2.0 to 6.0 V • Low Input Current: 1.0 µA • High Noise Immunity Characteristic of CMOS Devices ORDERING INFORMATION SL74HC161N Plastic SL74HC161D SOIC TA = -55 ° to 125° C for all packages LOGIC DIAGRAM PIN 16 =VCC PIN 8 = GND FUNCTION TABLE Inputs Outputs Reset Load Enable P Enable T Clock Q0 Q1 Q2 Q3 Function L X X X X L L L L Reset to “0” H L X X P0 P1 P2 P3 Preset Data H H X L No change No count H H L X No change No count H H H H Count up Count H X X X No change No count X=don’t care P0,P1,P2,P3 = logic level of Data inputs Ripple Carry Out = Enable T • Q0 • Q1 • Q2 • Q3 PIN ASSIGNMENT |
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