Part A
74VHC14MTCX
Онсеми
- Lifecycle
- Active
- Stock
- 4330 ПКС
- Package
- TSSOP-14
- Series
- Логика - Ворота и инверторы
Replacement verdict
Not a drop-in replacement
The 74VHC14MTCX and 74VHC00FT are not functionally interchangeable despite sharing the VHC logic family and similar supply voltage ranges. The 74VHC14MTCX is a hex Schmitt-trigger inverter in a TSSOP-14 package, while the 74VHC00FT is a quad 2-input NAND gate in a TSSOP-14 package. Their logic functions, input threshold behavior, and channel configurations differ fundamentally, so substituting one for the other would require circuit redesign and cannot be treated as a drop-in replacement.
Different logic function
Different channel count
Different input threshold
Different output drive
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | 74VHC14MTCX | 74VHC00FT | Why it matters |
|---|---|---|---|
| Logic Function | Hex Schmitt-Trigger Inverter | Quad 2-Input NAND Gate | The logic function determines the boolean operation performed; these devices are not functionally interchangeable as they implement entirely different gate types. |
| Number of Circuits | 6 | 4 | The circuit count affects how many independent signal channels are available in a single package, impacting board layout and component count. |
| Number of Inputs per Circuit | 1 | 2 | Input count per gate determines the logic capability; a NAND gate requires two inputs while an inverter requires only one. |
| Schmitt Trigger Input | Yes | No | Schmitt trigger inputs provide hysteresis for noise immunity and clean edge shaping on slow or noisy signals, which the standard NAND gate lacks. |
| Output Type | Inverted (Push-Pull) | NAND (Push-Pull) | Output type defines the resulting logic state relative to inputs and the drive configuration, directly affecting circuit behavior. |
| Package / Case | 14-TSSOP | 14-TSSOP | Package footprint and pin count must match the PCB layout for physical compatibility; both share the same 14-pin TSSOP outline. |
| Supply Voltage Range | 2 V to 5.5 V | 2 V to 5.5 V | The operating voltage range determines compatibility with the system power rail and logic level interfacing. |
| Propagation Delay (Typical) | 6.5 ns at 5 V | 4.3 ns at 5 V | Propagation delay affects maximum operating frequency and timing margins in synchronous or high-speed designs. |
| Output Drive Current | ±8 mA | ±8 mA | Output drive current determines the ability to drive loads such as LEDs, transmission lines, or multiple logic inputs. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | The temperature range defines the environments in which the device can reliably operate, critical for industrial and automotive applications. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | 74VHC14MTCX | 74VHC00FT |
|---|---|---|
| Supplier | - | Toshiba Semiconductor and Storage |
| Series | - | TC74VHC |
| Part Status | Active | Active |
| Logic Type | - | NAND Gate |
| Number of Circuits | - | 4 |
| Number of Inputs | - | 2 |
| Voltage - Supply | - | 2V ~ 5.5V |
| Current - Quiescent (Max) | - | 2 µA |
| Current - Output High Low | - | 8mA, 8mA |
| Logic Level - Low | - | 0.5V |
| Logic Level - High | - | 1.5V |
| Max Propagation Delay @ V Max CL | - | 7.5ns @ 5V, 50pF |
| Operating Temperature | - | -40°C ~ 85°C |
| Mounting Type | - | Surface Mount |
Frequently asked questions
What are the primary functional differences between the 74VHC14MTCX and the 74VHC00FT?
The 74VHC14MTCX is a hex Schmitt-trigger inverter, providing six independent inverter gates with hysteresis on the inputs. The 74VHC00FT is a quad 2-input NAND gate, providing four independent NAND gates without Schmitt-trigger hysteresis. They perform different logic functions and are not functionally equivalent.
Are the 74VHC14MTCX and 74VHC00FT pin-to-pin compatible?
No. The 74VHC14MTCX is supplied in a TSSOP-14 package, while the 74VHC00FT is supplied in a TSSOP-14 package as well, but the internal gate functions and pin assignments differ. The 74VHC14MTCX has six inverters with a specific pinout, whereas the 74VHC00FT has four NAND gates with a different pinout. They cannot be used interchangeably on the same PCB footprint without redesign.
Can the 74VHC14MTCX be used as a direct substitute for the 74VHC00FT in a logic circuit?
No. The 74VHC14MTCX is a Schmitt-trigger inverter, while the 74VHC00FT is a NAND gate. Substitution would require logic redesign because the output logic states and input threshold behavior are different. The 74VHC14MTCX inverts the signal and provides hysteresis, whereas the 74VHC00FT performs a NAND function without hysteresis.
What are the operating voltage ranges for the 74VHC14MTCX and 74VHC00FT?
Both devices are members of the VHC family and operate over a recommended supply voltage range of 2.0 V to 5.5 V. This is specified in the respective manufacturer datasheets for the 74VHC14MTCX and 74VHC00FT.
Do both the 74VHC14MTCX and 74VHC00FT have Schmitt-trigger inputs?
No. Only the 74VHC14MTCX has Schmitt-trigger inputs with defined hysteresis. The 74VHC00FT has standard CMOS inputs without Schmitt-trigger hysteresis. This difference affects noise immunity and slow-edge signal handling.
What are the package options for the 74VHC14MTCX and 74VHC00FT?
The 74VHC14MTCX is typically offered in a TSSOP-14 package. The 74VHC00FT is typically offered in a TSSOP-14 package. Both are surface-mount packages, but the pinouts differ due to different gate functions.
Which device is better for debouncing a mechanical switch: the 74VHC14MTCX or the 74VHC00FT?
The 74VHC14MTCX is better suited for debouncing because its Schmitt-trigger inputs provide hysteresis, which cleanly handles slow or noisy edges from mechanical switches. The 74VHC00FT lacks hysteresis and may produce multiple output transitions on slow input edges, making it less suitable for direct debouncing without additional circuitry.
Are the 74VHC14MTCX and 74VHC00FT available in the same logic family and similar propagation delay?
Yes, both are VHC-family CMOS devices. Their propagation delays are similar in magnitude, typically in the low nanosecond range at 5 V, but exact values differ by device and load conditions. Refer to the respective manufacturer datasheets for verified timing specifications.