M74HC4538RM13TR

The STMicroelectronics M74HC4538RM13TR is a high-speed CMOS monostable multivibrator designed for versatile timing applications. Fabricated with silicon gate C2MOS technology, this device features two independent retriggerable monostable multivibrators, each with both negative and positive edge-triggered inputs. Either trigger input can also function as an inhibit input, and a direct reset input is available for immediate output termination.

Key electrical specifications include a wide operating voltage range of 2V to 6V and a typical propagation delay of 25 ns at 6V. The device exhibits low power dissipation, with a maximum standby current of 4μA and a typical active current of 200μA at 6V. It boasts high noise immunity, with VNIH and VNIL at 28% of VCC (minimum), and symmetrical output impedance with |IOH| = IOL = 4mA (minimum).

The M74HC4538RM13TR is supplied in a 16-SOIC package for surface mounting. Its output pulse width is determined by external resistor and capacitor components, following the equation PW = 0.7 (R)(C). All inputs are protected against static discharge and transient overvoltage, ensuring robust operation in various environments. This component is pin and function compatible with the 74 Series 4538.

This multivibrator is suitable for applications requiring precise pulse generation and timing control. Its retriggerable capability allows for pulse width extension, making it adaptable to dynamic timing requirements. The wide operating temperature range of -55°C to 125°C further enhances its applicability in demanding conditions.