74VHC123AFT

Overview

The Toshiba 74VHC123AFT is a dual monostable multivibrator integrated circuit fabricated using silicon gate C2MOS technology. It operates within a supply voltage range of 2.0 V to 5.5 V and supports an operating temperature range from -40°C to 125°C. The device features Schmitt trigger inputs for slow rise/fall time signals, with propagation delays typically at 8.1 ns at 5 V. It includes power-down protection on all inputs and balanced propagation delays (tPLH ≈ tPHL). The component is housed in a TSSOP16B package.

Feature Summary

• Retriggerable dual monostable multivibrator architecture
• Schmitt trigger inputs compatible with slow rise/fall time signals
• Power-down protection provided on all input pins
• Balanced propagation delays between high-to-low and low-to-high transitions

Applications

• Timing pulse generation
• Debouncing switches
• Pulse width modulation
• Frequency division

Procurement Notes

Verify the specific ordering suffix 'AFT' corresponds to the TSSOP16B surface-mount package. Confirm AEC-Q100 compliance requirements if automotive qualification is necessary. Ensure external resistor and capacitor values adhere to specified limits for the target supply voltage to maintain operational integrity.

Selection Notes

Select this component when retriggerable monostable operation is required alongside wide temperature tolerance. Consider the 2.0 V to 5.5 V supply range for interfacing between different logic voltage levels. Verify that the TSSOP16B package fits the available PCB space and thermal constraints.

Part Context

This part belongs to the 74VHC series of high-speed CMOS logic devices. It is functionally pin-compatible with the 74HC123 type but offers higher speed performance. The device is manufactured by Toshiba Semiconductor and Storage Corporation.

Replacement Considerations

Direct substitutes include other 74VHC123 variants from different manufacturers that support the same TSSOP16B package and electrical characteristics. Verify pinout compatibility before substitution.

FAQ

Is the 74VHC123AFT retriggerable?

Yes, the 74VHC123AFT is a retriggerable monostable multivibrator.

What is the maximum operating temperature?

The maximum operating temperature is 125°C.