HEF4538BP,652

Multivibrators Overview

The HEF4538BP,652 is a dual precision monostable multivibrator manufactured by NXP Semiconductors. It operates within a supply voltage range of 3 V to 15 V and features two independent retriggerable-resettable circuits. Each circuit includes active LOW trigger/retrigger inputs (nA), active HIGH trigger/retrigger inputs (nB), an overriding active LOW direct reset input (nCD), and complementary outputs (nQ and nQ). The output pulse width is determined by external timing components REXT and CEXT connected to dedicated pins.

Multivibrators Feature Summary

• Tolerant of slow trigger rise and fall times due to Schmitt trigger action on inputs
• Fully static operation with CMOS low power dissipation and high noise immunity
• Provides standardized symmetrical output characteristics across specified parametric ratings
• Complies with JEDEC standard JESD 13-B for robustness and reliability

Multivibrators Applications

• Timing generation and pulse shaping in digital logic systems
• Debouncing mechanical switches or contacts
• Frequency division and pulse width modulation circuits

Multivibrators Procurement Notes

Verify the specific ordering suffix against the manufacturer's current documentation to confirm package type and temperature rating. Confirm that the component meets all required environmental standards and RoHS compliance specifications before finalizing procurement orders.

Multivibrators Selection Notes

Select this component when precise pulse width control is required using external RC networks. Ensure the application voltage falls within the 3 V to 15 V operating range. Consider the SO16 package dimensions and thermal dissipation requirements if multiple units are utilized in close proximity.

Multivibrators Part Context

This device belongs to the HEF4538B family of dual precision monostable multivibrators. It utilizes LOCMOS technology to guarantee precise control of output pulse widths. The component is designed for general-purpose timing applications requiring reliable performance over wide temperature ranges.

Multivibrators Replacement Considerations

HEF4538BT is available in an SO16 plastic small outline package.