CD4538BCN

Multivibrators Overview

The CD4538BC is a dual precision monostable multivibrator implemented in advanced CMOS technology. It features independent trigger and reset controls with internally latched inputs, supporting both rising and falling edge triggering via separate A and B inputs. The device is retriggerable and resettable, utilizing linear CMOS techniques for precise pulse-width control determined by external components RX and CX. It offers symmetrical output sink and source capabilities, high noise immunity, and low standby current of 5 nA typical at 5 V DC.

Multivibrators Feature Summary

• Dual precision monostable multivibrator with independent trigger and reset controls
• Retriggerable and resettable operation with internally latched control inputs
• Supports both rising and falling edge triggering through separate A and B inputs
• Symmetrical output sink and source capability with high noise immunity

Multivibrators Applications

• Timing circuits requiring precise pulse width generation
• Debouncing switches or contacts
• Pulse width modulation applications
• Frequency division circuits

Multivibrators Procurement Notes

Verify the package type matches the required form factor, as the CD4538BC is available in multiple packages including SOIC and PDIP. Confirm the manufacturer origin, as Fairchild Semiconductor was acquired by onsemi, affecting part marking and sourcing channels. Ensure the specific ordering code suffix corresponds to the desired tape and reel or tube packaging configuration if applicable.

Multivibrators Selection Notes

Select this component when dual independent monostable sections are needed within a single package. Consider the wide supply voltage range from 3.0V to 15V for compatibility with various logic families. Evaluate the timing requirements against the external RC network limitations and the specified propagation delays to ensure signal integrity in the target application frequency range.

Multivibrators Part Context

The CD4538BC belongs to the CD4000 series of CMOS digital logic devices. It is pin-compatible with the CD4528BC, allowing for potential design swaps without layout changes. This family is known for wide power supply ranges and high noise immunity, making it suitable for industrial and commercial environments where stable operation across varying conditions is critical.

Multivibrators Replacement Considerations

The CD4528BC is explicitly noted as pin-compatible. Other manufacturers may offer equivalent parts under different naming conventions, but verification of electrical characteristics and pinout is required before substitution.