HCC4541B

HCC4541B HCF4541B PROGRAMMABLE TIMER 16 STAGE BINARI COUNTER LOW SYMMETRICAL OUTPUT RESISTANCE, TYPICALLY 100 OHM AT VDD = 15V OSCILLATOR FREQUENCY RANGE : DC TO 100kHz AUTO OR MASTER RESET DISABLES OSCILLATOR DURING RESET TO REDUCE POWER DISSIPATION OPERATES WITH VERY SLOW CLOCK RISE AND FALL TIMES BUILT-IN LOW-POWER RC OSCILLATOR EXTERNAL CLOCK (applied to pin 3) CAN BE USED INSTEAD OF OSCILLATOR OPERATES AS 2N FREQUENCY DIVIDER OR AS A SINGLE-TRANSITION TIMER Q/Q SELECT PROVIDES OUTPUT LOGIC LEVEL FLEXIBILITY CAPABLE OF DRIVING SIX LOW POWER TTL LOADS, THREE LOW-POWER SCHOTTKY LOADS, PR SIX HTL LOADS OVER THE RATED TEMPERATURE RANGE SYMMETRICAL OUTPUT CHARACTERISTICS 100% TESTED FOR QUIESCENT CURRENT AT 20V 5-10-15V PARAMETRIC RATINGS MEETS ALL REQUIREMENTS OF JEDEC TENTATIVE STANDARD N 13A, ”STANDARD SPECIFICATIONS FOR DESCRIPTION OF ’ B ’ SERIES CMOS DEVICES” DESCRIPTION The HCC/HCF4541B Programmable Timer is composed of a 16-stage binary counter, an oscillator controlled by 2 external resistors and a capacitor, an output control logic and an automatic power-on reset circuit. The counter varies on positive-edge clock transation and it can be cleared by the MASTER RESET input. The output from this timer is the Q or Q output from the 8th, 13th, or 16th counter stage. The choice of the stage depends on the timeselect inputs A or B (see frequency selection table). The output is available in one of the two modes that can be selected via the MODE input, pin 10 (see truth table...