4-bit synchronous up/down counter — 49 MHz in a 16-SSOP
The Nexperia 74HC193DB,118 is a 4-bit binary counter that counts both up and down on the positive edge of the clock, with an asynchronous reset that clears the outputs independent of the clock. The 49 MHz count rate supports moderate-speed event counting, frequency division, and time-base generation in systems that don't need the higher clock rates of the 74AC or 74LVC families.
Asynchronous reset — no clock needed to clear
The reset is asynchronous, meaning the counter clears to zero immediately when the reset pin is asserted, regardless of the clock state. This is useful for power-on initialization or fault recovery where the clock may not be running. The reset pin is active-high per the 74HC logic convention.
Wide temperature range and supply — industrial and automotive use
The 2 V to 6 V supply range lets it interface with both legacy 5 V logic and modern 3.3 V systems without a level shifter, though the 49 MHz count rate is specified at 5 V — expect derating at lower supply voltages.
ROHS3 compliant.