M74HC163 SYNCHRONOUS PRESETTABLE 4-BIT COUNTER HIGH SPEED : f = 62 MHz (TYP.) at V = 6V MAX CC LOW POWER DISSIPATION: I =4A(MAX.) at T =25C CC A HIGH NOISE IMMUNITY: V = V = 28 % V (MIN.) NIH NIL CC DIP SOP TSSOP SYMMETRICAL OUTPUT IMPEDANCE: I = I = 4mA (MIN) OH OL BALANCED PROPAGATION DELAYS: t t ORDER CODES PLH PHL WIDE OPERATING VOLTAGE RANGE: PACKAGE TUBE T & R V (OPR) = 2V to 6V CC DIP M74HC163B1R PIN AND FUNCTION COMPATIBLE WITH SOP M74HC163M1R M74HC163RM13TR 74 SERIES 163 TSSOP M74HC163TTR DESCRIPTION The M74HC163 is an high speed CMOS CLOCK. Two enable inputs (TE and PE) and SYNCHRONOUS 4 BIT BINARY PRESETTABLE CARRY output are provided to enable easy 2 COUNTER fabricated with silicon gate C MOS cascading of counters, which facilities easy technology. implementation of N-bit counters without using The CLOCK input is active on the rising edge. external gates. Both LOAD and CLEAR inputs are active LOW. All inputs are equipped with protection circuits Presetting is synchronous on the rising edge of against static discharge and transient excess voltage. the clock, the function is synchronous to the PIN CONNECTION AND IEC LOGIC SYMBOLS July 2001 1/12 Obsolete Product(s) - Obsolete Product(s)M74HC163 INPUT AND OUTPUT EQUIVALENT CIRCUIT PIN DESCRIPTION PIN No SYMBOL NAME AND FUNCTION Asynchronous Master 1 CLEAR Reset Clock Input (LOW to 2 CLOCK HIGH, Edge-triggered) 3, 4, 5, 6 A, B, C, D Data Inputs 7 PE Count Enable Input 10 TE Count Enable Carry Input 9LOAD Parallel Enable Input 14, 13, 12, QA to QD Flip Flop Outputs 11 15 CARRY Terminal Count Output 8 GND Ground (0V) 16 Vcc Positive Supply Voltage TRUTH TABLE INPUTS OUTPUTS FUNCTION CLEAR LOAD PE TE CLOCK QA QB QC QD L X X X L L L L RESET TO0 H L X X A B C D 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 : Dont Care A, B, C, D : Logic level of data inputs Carry : CARRY = TEQ Q Q Q A B C D LOGIC DIAGRAM This logic diagram has not be used to estimate propagation delays 2/12 Obsolete Product(s) - Obsolete Product(s)