The following table shows whether each CMOS logic IC series provides the input-tolerant and output power-down protection functions.
Series | Part Number | Operating voltage range (V) |
Input-tolerant function | Output power-down protection |
---|---|---|---|---|
Standard CMOS | TC4000B TC4500B |
3 to 18 | -*1 | - |
High-Speed | TC74HC | 2 to 6 | -*1 | - |
TC74HCT | 4.5 to 5.5 | |||
Advanced | TC74AC | 2 to 5.5 | - | - |
TC74ACT | 4.5 to 5.5 | |||
Very-High-Speed | 74VHC 74VHC9 |
2 to 5.5 | ✔ | - |
74VHCT | 4.5 to 5.5 | ✔ | ✔ | |
74VHCV | 1.8 to 5.5 | ✔ | ✔ | |
Low-Voltage | 74LCX | 1.65 to 3.6 | ✔ | ✔ |
Very-Low-Voltage | TC74VCX | 1.2 to 3.6 | ✔ | ✔ |
*1: TC4049BF/BP, TC4050BF/BP, TC74HC4049BP/BF/BFT, 74HC4049D, TC74HC4050BP/BF/BFT and 74HC4050D have the input-tolerant function that allows level shifting from a higher voltage to a lower voltage.