TOSHIBA 74VHC161FT(BJ)

74VHC161FT(BJ) is a CMOS digital silicon monolithic IC. It is an advanced high speed CMOS synchronous presettable 4bit binary counter fabricated with silicon gate C²MOS technology. It achieves the high speed operation similar to equivalent bipolar schottky TTL while maintaining the CMOS low power dissipation. The CK input is active on the rising edge. Both active-low LOAD and active-low CLR inputs are active on low logic level. Presetting of each IC's is synchronous to the rising edge of CK. This device is cleared asynchronously. Two enable inputs (ENP and ENT) and CARRY OUTPUT are provided to enable easy cascading of counters, which facilitates easy implementation of n-bit counters without using external gates. An input protection circuit ensures that 0 to 5.5V can be applied to the input pins without regard to the supply voltage. This device can be used to interface 5V to 3V systems and two supply systems such as battery back-up.