View m74hct161 datasheet:

M74HCT161 SYNCHRONOUS PRESETTABLE 4-BIT COUNTER HIGH SPEED : fMAX = 50 MHz (TYP.) at VCC = 4.5V LOW POWER DISSIPATION: ICC =4µA(MAX.) at TA=25°C COMPATIBLE WITH TTL OUTPUTS : VIH = 2V (MIN.) VIL = 0.8V (MAX) DIP SOP TSSOP SYMMETRICAL OUTPUT IMPEDANCE: |IOH| = IOL = 4mA (MIN) BALANCED PROPAGATION DELAYS: tPLH ? tPHL ORDER CODES PIN AND FUNCTION COMPATIBLE WITH PACKAGE TUBE T & R 74 SERIES 161 DIP M74HCT161B1R SOP M74HCT161M1R M74HCT161RM13TR DESCRIPTION TSSOP M74HCT161TTR The M74HCT161 is an high speed CMOS SYNCHRONOUS 4-BIT BINARY PRESETTABLE COUNTER fabricated with silicon output are provided to enable easy cascading of gate C2MOS technology. counters, which facilities easy implementation of The CLOCK input is active on the rising edge. N-bit counter