Input-Tolerant and Output Power-Down Protection Functions Available with Each Series
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.
Usage Considerations of CMOS Logic ICs
Handling of Unused Input Pins
Input Rise and Fall Time Specifications
Multiple Outputs from a General-Purpose CMOS Logic IC Come Into Conflict (Short-Circuiting)
Connecting a Load Capacitance to a CMOS Output Pin
Calculating the Operating Supply Current and Power Dissipation
Level Shifting Using an Input-Tolerant Function
Example of Application of the Power-Down Protection Function (Partial Power-Down)
Types of Noise to be Noted
Countermeasures for Reducing Switching Noise
Countermeasures for Signal Reflection
Countermeasures for Crosstalk
Countermeasures for Hazards
Countermeasures for Metastability
Countermeasures for Latch-Up
Countermeasures for ESD Protection
Products
Related information
- Application Notes
- FAQ
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