ON Semiconductor MC74HC4538AFELG: Precision Retriggerable/Resettable Monostable Multivibrator

The MC74HC4538AFELG from ON Semiconductor is a high-performance, retriggerable/resettable monostable multivibrator fabricated with silicon gate CMOS technology. It is designed to produce precise timing pulses and has the capability to produce output pulses in response to each input pulse.

With a wide supply voltage range from 2V to 6V, this device is suitable for battery-operated applications and can be used in various timing control applications. The MC74HC4538AFELG is capable of operating in two modes: retriggerable and non-retriggerable, which provides flexibility for a range of design requirements.

The device features two separate monostable multivibrators (timers) within the same package, each with its own set of inputs and outputs. Inputs include Trigger (A), Reset (B), and External Timing Capacitor (Cext). Outputs are available in both true and complementary forms. The precision control of output pulse widths is achieved through external timing components (resistor and capacitor).

Key features of the MC74HC4538AFELG include:

• High Speed: Typical propagation delay times are as low as 18ns, providing quick response for timing applications.
• Low Power Consumption: The CMOS technology ensures low quiescent current, making it ideal for power-sensitive designs.
• Output Pulse Width Range: The pulse width can be adjusted from a few nanoseconds to extremely long duration, up to 100% duty cycle, by selecting appropriate external R-C components.
• Retriggerable/Non-Retriggerable Modes: Offers versatility in application use, allowing for continuous pulse generation or single pulse production upon input.
• Lead-Free and RoHS Compliant: The device is environmentally friendly and meets current regulatory requirements for hazardous substances.

The MC74HC4538AFELG is presented in a 16-lead SOIC package, ensuring a compact footprint for space-constrained applications. It is a reliable choice for designers who require accurate and stable timing pulses in their digital logic circuits, such as timers, pulse generators, or delay lines in consumer electronics, automotive, and industrial systems.

ON Semiconductor's commitment to quality and performance is evident in the MC74HC4538AFELG, making it an essential component for precision timing solutions in a wide array of electronic products.