NXP PC74HC123T Dual Retriggerable Monostable Multivibrator

The NXP PC74HC123T is a high-speed Si-gate CMOS device that forms part of the 74HC/HCT family of logic integrated circuits. This dual retriggerable monostable multivibrator features two individual monostable multivibrators in a single package, providing a reliable solution for timing, pulse shaping, and signal delay applications in a variety of digital systems.

Each multivibrator of the PC74HC123T has an active LOW trigger input (nA), an active HIGH trigger input (nB), an overriding active LOW direct reset input (nCD), an output (nQ), and a complementary output (nQ̅). The device is capable of generating output pulses from a few nano-seconds to extremely long duration up to 100% duty cycle when operated in the retriggerable mode.

One of the key features of the PC74HC123T is its ability to be triggered by either a rising or falling edge of the input signal, which provides flexibility in interfacing with various types of logic circuits. Additionally, the outputs are capable of driving up to 10 LSTTL loads, which ensures compatibility with most logic families.

The device is also characterized by its wide operating voltage range from 2.0V to 6.0V, which allows it to be used in systems that operate on standard TTL power levels as well as those that benefit from the lower power consumption of CMOS technology. The low power consumption is further emphasized by the typical ICC of only 40 nA, making the PC74HC123T an energy-efficient choice for battery-operated devices.

The PC74HC123T comes in a 16-pin TSSOP package, which is suitable for surface-mount technology (SMT), allowing for efficient use of PCB space in compact electronic designs. The robustness of the device is highlighted by its ESD protection exceeding JESD 22, ensuring reliability and longevity even in environments where static discharge could be a concern.

Overall, the NXP PC74HC123T is a versatile and reliable component for designers looking to implement precise timing functions in their digital logic circuits, with the added benefits of low power consumption and high noise immunity.