CD54HCT123F3A

Multivibrators Overview

The CD54HCT123F3A is a dual retriggerable monostable multivibrator from the Texas Instruments HCT logic family, housed in a 16-lead ceramic DIP package. It operates within a supply voltage range of 4.5V to 5.5V and supports an extended temperature range of -55°C to 125°C. The device features Schmitt trigger inputs for noise immunity and provides both Q and Q buffered outputs. Timing is controlled by external resistor and capacitor components.

Multivibrators Feature Summary

• Dual independent monostable circuits with separate reset controls
• Retriggerable operation allowing pulse width extension via input edges
• Schmitt trigger inputs on A and B terminals for signal conditioning
• Direct LSTTL input logic compatibility

Multivibrators Applications

• Pulse generation and timing control
• Debouncing switches or contacts
• Frequency division
• Timing delay circuits

Multivibrators Procurement Notes

Verify the specific military-grade qualification status associated with the CD54 prefix before procurement. Confirm that the 16-lead CERDIP packaging meets the thermal and mechanical requirements of the target application environment. Ensure proper electrostatic discharge handling procedures are followed during installation.

Multivibrators Selection Notes

Select this component when direct LSTTL compatibility is required alongside high-speed CMOS performance. The HCT series ensures logical compatibility with standard TTL levels while maintaining low power consumption. Verify that the external timing components can support the desired pulse width range and accuracy requirements.

Multivibrators Part Context

This part belongs to the CD54/74HC/HCT123 family of dual monostable multivibrators. It differs from the CD54/74HC variants by its specific input voltage thresholds designed for 5V systems. The 'F3A' suffix indicates the specific ceramic package configuration suitable for rugged environments.

Multivibrators Replacement Considerations

CD54HC123F3A

Multivibrators FAQ

How is the output pulse width determined?

The output pulse width is determined by the values of the external resistor (Rx) and capacitor (Cx) connected to the device.

Can the output pulse be terminated early?

Yes, applying a LOW level to the Reset (R) pin will terminate the output pulse immediately.