Part A
74HC00D
Компания Toshiba Semiconductor и Storage
- Lifecycle
- Active
- Stock
- 4166 ПКС
- Package
- SOIC-14
- Series
- Логика - Ворота и инверторы
Replacement verdict
Not a drop-in replacement
The 74HC04D and 74HC00D are not functionally interchangeable despite sharing the same 74HC logic family and SOIC-14 package. The 74HC04D provides six independent inverters, while the 74HC00D contains four 2-input NAND gates, resulting in fundamentally different logic functions, gate counts, and pinout signal assignments. Direct substitution is not possible without circuit redesign.
Different logic function
Different gate count
Different pinout assignment
Different input configuration
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | 74HC04D | 74HC00D | Why it matters |
|---|---|---|---|
| Logic Function | Hex Inverter (NOT gate) | Quad 2-Input NAND gate | Defines the fundamental logic operation performed; these are not functionally interchangeable since one inverts a single input while the other performs NAND on two inputs. |
| Number of Gates | 6 | 4 | Determines how many independent logic operations are available per package, affecting circuit density and board layout. |
| Number of Inputs per Gate | 1 | 2 | Affects the logic capability of each gate and whether the device can implement multi-input functions directly. |
| Supply Voltage Range | 2.0 V to 6.0 V | 2.0 V to 6.0 V | Defines the compatible power supply window for the device to operate reliably within HC-family logic levels. |
| Logic Family | 74HC (High-speed CMOS) | 74HC (High-speed CMOS) | Ensures compatible input/output voltage thresholds and noise margins when interfacing with other logic devices. |
| Output Drive Current | ±4 mA (at 4.5 V) | ±4 mA (at 4.5 V) | Determines the fan-out and ability to drive loads such as LEDs or other logic inputs directly. |
| Propagation Delay | Typical 9 ns (at 4.5 V) | Typical 9 ns (at 4.5 V) | Affects maximum operating frequency and timing margins in synchronous or high-speed circuits. |
| Package Type | SOIC-14 | SOIC-14 | Determines PCB footprint and assembly compatibility; identical packages allow the same board layout to be reused. |
| Pin Count | 14 | 14 | Affects package size and pinout compatibility; matching pin count simplifies substitution at the footprint level. |
| Operating Temperature Range | -40 °C to +125 °C | -40 °C to +125 °C | Ensures reliable operation across industrial and automotive temperature environments. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | 74HC00D | 74HC04D |
|---|---|---|
| Series | 74HC | 74HC |
| Part Status | Active | Active |
| Logic Type | NAND Gate | Inverter |
| Number of Circuits | 4 | 6 |
| Number of Inputs | 2 | 1 |
| Voltage - Supply | 2V ~ 6V | 2V ~ 6V |
| Current - Quiescent (Max) | 1 µA | 1 µA |
| Current - Output High Low | 5.2mA, 5.2mA | 5.2mA, 5.2mA |
| Logic Level - Low | 0.5V ~ 1.8V | 0.5V ~ 1.8V |
| Logic Level - High | 1.5V ~ 4.2V | 1.5V ~ 4.2V |
| Max Propagation Delay @ V Max CL | 13ns @ 6V, 50pF | 13ns @ 6V, 50pF |
| Operating Temperature | -40°C ~ 125°C | -40°C ~ 125°C |
| Mounting Type | Surface Mount | Surface Mount |
Frequently asked questions
What are the primary functional differences between the 74HC04D and 74HC00D?
The 74HC04D contains six independent inverters (NOT gates), each providing a single input and its logical complement output. The 74HC00D contains four independent 2-input NAND gates, each providing two inputs and a single output that is LOW only when both inputs are HIGH. They are not functionally equivalent and cannot be substituted for one another without redesigning the surrounding logic.
Are the 74HC04D and 74HC00D pin-compatible in the SO14 package?
No. Although both devices are commonly offered in a 14-pin SOIC package, their pinouts differ. The 74HC04D uses pins 1 through 6 as inverter inputs and pins 8 through 13 as the corresponding outputs, with pins 7 and 14 as GND and VCC. The 74HC00D uses pins 1, 2, 4, 5, 9, 10, 12, and 13 as gate inputs and pins 3, 6, 8, and 11 as gate outputs, with pins 7 and 14 as GND and VCC. A direct board-level swap is therefore not possible.
Do the 74HC04D and 74HC00D operate from the same supply voltage range?
Yes. Both are 74HC-family CMOS devices and are specified for a nominal supply voltage range of 2.0 V to 6.0 V. Operation below 2.0 V or above 6.0 V is outside the verified datasheet limits for standard 74HC parts.
How do the propagation delays of the 74HC04D and 74HC00D compare?
Both devices are specified with typical propagation delays in the low-nanosecond range at 5 V supply, but the exact values depend on the manufacturer, supply voltage, load capacitance, and temperature. The 74HC04D and 74HC00D are generally comparable in speed within the same 74HC family, and any design timing analysis should use the specific manufacturer datasheet rather than assuming identical delays.
Can the 74HC04D be used to replace a 74HC00D if the NAND function is not required?
No. The 74HC04D provides inverters, not NAND gates. Even if only an inversion function is needed, the pinout and gate count differ, so the replacement would require circuit and layout changes. The two devices are not drop-in replacements.
Are the 74HC04D and 74HC00D available in the same package options?
Both devices are widely available in the SO14 (D) package, as indicated by the "D" suffix in their part numbers. They may also be offered in other packages such as TSSOP or DIP by various manufacturers, but package availability should be confirmed against the specific manufacturer datasheet and distributor listing.
What are the input and output logic thresholds for the 74HC04D and 74HC00D?
Both devices follow standard 74HC CMOS input thresholds, typically specified as VIH ≥ 0.7 × VCC and VIL ≤ 0.3 × VCC at 4.5 V supply, with corresponding output levels VOH and VOL defined under specified load conditions. These parameters are common to the 74HC family and should be verified from the specific manufacturer datasheet for the exact part number.
Which device is better for implementing a simple oscillator or pulse-shaping circuit?
The 74HC04D is commonly used for oscillator and pulse-shaping circuits because its inverting gates can be configured with external resistors and capacitors to form relaxation oscillators or to sharpen slow edges. The 74HC00D can also be used in oscillator configurations, but its NAND gates provide additional gating control. The choice depends on whether inversion alone or gated logic is required.