View m74hc161 datasheet:

M74HC161 SYNCHRONOUS PRESETTABLE 4-BIT COUNTER HIGH SPEED : fMAX = 62 MHz (TYP.) at VCC = 6V LOW POWER DISSIPATION: ICC =4µA(MAX.) at TA=25°C HIGH NOISE IMMUNITY: VNIH = VNIL = 28 % VCC (MIN.) DIP SOP TSSOP SYMMETRICAL OUTPUT IMPEDANCE: |IOH| = IOL = 4mA (MIN) BALANCED PROPAGATION DELAYS: tPLH ? tPHL ORDER CODES WIDE OPERATING VOLTAGE RANGE: PACKAGE TUBE T & R VCC (OPR) = 2V to 6V DIP M74HC161B1R PIN AND FUNCTION COMPATIBLE WITH SOP M74HC161M1R M74HC161RM13TR 74 SERIES 161 TSSOP M74HC161TTR DESCRIPTION The M74HC161 is an high speed CMOS Two enable inputs (TE and PE) and CARRY SYNCHRONOUS 4-BIT BINARY output are provided to enable easy cascading of PRESETTABLE COUNTER fabricated with silicon counters, which facilities easy implementation of gate C2MOS