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HCF40161B Datasheet(PDF) 1 Page - STMicroelectronics |
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HCF40161B Datasheet(HTML) 1 Page - STMicroelectronics |
1 / 14 page 1/14 September 2002 s INTERNAL LOOK-AHEAD FOR FAST COUNTING s CARRY OUTPUT FOR CASCADING s SYNCHRONOUSLY PROGRAMMABLE s LOW-POWER TTL COMPATIBILITY s STANDARDIZED SYMMETRICAL OUTPUT CHARACTERISTICS s QUIESCENT CURRENT SPECIF. UP TO 20V s 5V, 10V AND 15V PARAMETRIC RATINGS s INPUT LEAKAGE CURRENT II = 100nA (MAX) AT VDD = 18V TA = 25°C s 100% TESTED FOR QUIESCENT CURRENT s MEETS ALL REQUIREMENTS OF JEDEC JESD13B "STANDARD SPECIFICATIONS FOR DESCRIPTION OF B SERIES CMOS DEVICES" DESCRIPTION HCF40161B is a monolithic integrated circuit fabricated in Metal Oxide Semiconductor technology available in DIP and SOP packages. HCF40161B is a 4-bit synchronous programmable counter. The CLEAR function is asynchronous. A low level at the CLEAR input sets all four outputs low regardless of the state of the CLOCK, LOAD and ENABLE inputs. A low level at the LOAD inputs disables the counter and causes the output to agree with the set-up data after the following CLOCK pulse regardless of the conditions of the ENABLE inputs. The carry look-ahead circuitry provides for cascading counter for n-bit synchronous application without additional gating. Counting is enabled when both the PE and TE inputs are high. The TE input is fed forward to enable COUT. This enable output produces a positive output pulse with a duration approximately equal to the positive portion of the Q1 output. This positive overflow carry pulse can be used to enable successive cascaded stages. Logic transitions at the PE and TE inputs may occur when the clock is either high or low. HCF40161B SYNCHRONOUS PROGRAMMABLE 4-BIT BINARY COUNTER WITH ASYNCHRONOUS CLEAR PIN CONNECTION ORDER CODES PACKAGE TUBE T & R DIP HCF40161BEY SOP HCF40161BM1 HCF40161M013TR DIP SOP |
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