Part A
74HCT4051D
東芝セミコンダクター・アンド・ストレージ
- Lifecycle
- Active
- Stock
- 1430 個数
- Package
- SOP-16
- Series
- インターフェース - アナログスイッチ、マルチプレクサ、デマルチプレクサ
Replacement verdict
Not a drop-in replacement
The 74HCT4051D and 74HCT00D,653 are functionally unrelated devices and cannot serve as substitutes for one another. The 74HCT4051D is an 8-channel analog multiplexer/demultiplexer, while the 74HCT00D,653 is a quad 2-input NAND gate. Their internal architectures, logic functions, pin assignments, and signal paths are fundamentally different, making direct replacement impossible in any design context.
Different logic function
Different channel configuration
Different pinout
Different signal path type
Parts at a glance
Part B
74HCT00D,653
ネクスペリアUSA株式会社
- Lifecycle
- Active
- Stock
- 4108 個数
- Series
- ロジック - ゲートおよびインバータ
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | 74HCT4051D | 74HCT00D,653 | Why it matters |
|---|---|---|---|
| Function | Single 8-channel analog multiplexer/demultiplexer | Quad 2-input NAND gate | The core logic function differs completely, so the two devices are not functionally interchangeable in a circuit. |
| Logic Family | HCT (high-speed CMOS, TTL-compatible) | HCT (high-speed CMOS, TTL-compatible) | Both belong to the same HCT family, giving compatible input thresholds and supply requirements. |
| Supply Voltage Range | 4.5 V to 5.5 V | 4.5 V to 5.5 V | Identical operating voltage window allows both to run from a standard 5 V rail. |
| Number of Channels / Gates | 1 multiplexer with 8 channels | 4 NAND gates | Channel/gate count determines how many signals can be routed or processed per package. |
| Analog Signal Capability | Yes, passes analog signals | No, digital logic only | Only the multiplexer can handle analog voltages; the NAND gate is limited to digital levels. |
| Propagation Delay | Typically around 10 ns at 5 V | Typically around 9 ns at 5 V | Delay affects maximum usable switching speed in timing-critical designs. |
| Package | SO16 (SOIC-16) | SO14 (SOIC-14) | Different pin counts and footprints prevent direct board-level substitution. |
| Pin Count | 16 | 14 | Pin count mismatch means the devices cannot share the same PCB footprint. |
| Output Drive Current | Typically ±4 mA at 5 V | Typically ±4 mA at 5 V | Similar drive strength affects fan-out and ability to drive downstream loads. |
Need help validating a replacement?
Send your BOM and application constraints for technical and sourcing review.
Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | 74HCT4051D | 74HCT00D,653 |
|---|---|---|
| Supplier | - | Nexperia USA Inc. |
| Series | - | 74HCT |
| Part Status | Active | Active |
| Logic Type | - | NAND Gate |
| Number of Circuits | 1 | 4 |
| Number of Inputs | - | 2 |
| Voltage - Supply | - | 4.5V ~ 5.5V |
| Current - Quiescent (Max) | - | 40 µA |
| Current - Output High Low | - | 4mA, 4mA |
| Logic Level - Low | - | 0.8V |
| Logic Level - High | - | 2V |
| Max Propagation Delay @ V Max CL | - | 12ns @ 4.5V, 50pF |
| Operating Temperature | -40°C ~ 125°C (TA) | -40°C ~ 125°C |
| Mounting Type | Surface Mount | Surface Mount |
| Multiplexer / Demultiplexer Circuit | 8:1 | - |
| On - State Resistance(Max) | 120Ohm | - |
| Channel - to - Channel Matching(ΔRon) | 6Ohm | - |
| Voltage - Supply, Single (V+) | 4.5V ~ 5.5V | - |
| Voltage - Supply, Dual (V±) | ±1V ~ 5V | - |
| Switch Time(Ton Toff)(Max) | 39ns, 32ns | - |
| -3 dB Bandwidth | 180MHz | - |
| Channel Capacitance(CS(off)CD(off)) | 3.5pF | - |
| Current - Leakage(IS(off))(Max) | 400nA | - |
Frequently asked questions
What are the primary functional differences between the 74HCT4051D and the 74HCT00D,653?
The 74HCT4051D is an 8-channel analog multiplexer/demultiplexer that routes one of eight analog or digital signals to a common input/output, while the 74HCT00D,653 contains four independent 2-input NAND gates for digital logic operations. They serve fundamentally different roles: signal routing versus logic gating.
Are the 74HCT4051D and 74HCT00D,653 pin-compatible?
No. The 74HCT4051D is typically supplied in a 16-pin SOIC package, whereas the 74HCT00D,653 is supplied in a 14-pin SOIC package. They have different pin counts and pin functions, so they cannot be used interchangeably on the same PCB footprint.
Can the 74HCT4051D and 74HCT00D,653 operate from the same supply voltage?
Yes. Both devices are members of the 74HCT logic family and are specified for a nominal supply voltage of 5 V, with a typical operating range of 4.5 V to 5.5 V. However, always confirm the exact limits in the respective manufacturer datasheets.
Does the 74HCT4051D provide analog signal switching capability that the 74HCT00D,653 lacks?
Yes. The 74HCT4051D is designed to pass analog signals within its specified voltage range, making it suitable for multiplexing sensor outputs or audio signals. The 74HCT00D,653 is a digital logic device and is not intended for analog signal routing.
What are the typical propagation delays for these two devices?
The 74HCT00D,653 NAND gate typically exhibits a propagation delay of approximately 9 ns to 15 ns at 5 V, depending on load conditions. The 74HCT4051D multiplexer typically has a propagation delay in the range of 10 ns to 20 ns for digital signals, but analog signal performance is better characterized by on-resistance and bandwidth rather than logic propagation delay.
Are both devices compatible with 5 V TTL logic levels?
Yes. Both the 74HCT4051D and 74HCT00D,653 are HCT-type devices, meaning they accept TTL-compatible input levels while operating from a 5 V supply, allowing direct interfacing with TTL logic without additional level shifting.
Which device is more suitable for multiplexing multiple digital signals onto a single line?
The 74HCT4051D is the appropriate choice because it is specifically designed as an 8-channel multiplexer/demultiplexer. The 74HCT00D,653 cannot perform multiplexing; it only provides fixed NAND logic functions.
Do both devices have the same operating temperature range?
Both the 74HCT4051D and 74HCT00D,653 are typically specified for the industrial temperature range of -40 °C to +125 °C or -40 °C to +85 °C, depending on the exact manufacturer and suffix. Verify the specific ordering code datasheet for the precise rating.