Part A
74HCT4051D
Toshiba Semiconductor et stockage
- Lifecycle
- Active
- Stock
- 1430 PCS
- Package
- SOP-16
- Series
- Interfaces - commutateurs analogiques, multiplexeurs, démultiplexeurs
Replacement verdict
Not a drop-in replacement
The 74HCT4051D and 74HCT11DB,112 are functionally unrelated devices: one is an 8-channel analog multiplexer/demultiplexer and the other is a triple 3-input AND gate. They differ in logic function, channel configuration, input/output architecture, and package format, so neither can substitute for the other in an existing design.
Different logic function
Different channel configuration
Different I/O architecture
Different package type
Parts at a glance
Part B
74HCT11DB,112
Nexperia USA Inc.
- Lifecycle
- Active
- Stock
- 9960 PCS
- Series
- Logique - portes et Onduleurs
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 | 74HCT11DB,112 | Why it matters |
|---|---|---|---|
| Function | Single 8-channel analog multiplexer/demultiplexer | Triple 3-input AND gate | These devices perform completely different logic functions, so they are not functionally substitutable in any design. |
| Logic Type | Analog switch / multiplexer | Digital logic gate | Analog signal routing versus digital Boolean logic determines the fundamental application and signal domain. |
| Number of Channels | 1 channel (8:1 multiplexer) | 3 gates | Channel count defines how many independent signals can be handled, directly affecting circuit architecture. |
| Number of Inputs per Function | 8 analog inputs | 3 inputs per gate | Input count per function determines the logic or switching capability required by the application. |
| Supply Voltage Range | 4.5 V to 5.5 V | 4.5 V to 5.5 V | Both operate in the standard 5 V HCT logic range, so supply compatibility is not a differentiator. |
| Propagation Delay | Typically around 10 ns at 5 V | Typically around 10 ns at 5 V | Similar propagation delay means timing performance is comparable, but the functions remain incompatible. |
| Output Drive Current | Low analog switch current capability | Standard CMOS logic output drive | Output drive affects fan-out and load driving, and the two devices have different output characteristics. |
| Package | SO16 | SSOP14 | Different package sizes and pin counts prevent direct board-level substitution without layout changes. |
| Pin Count | 16 | 14 | Pin count mismatch means the devices cannot share the same footprint or socket. |
| Operating Temperature Range | -40 °C to +125 °C | -40 °C to +125 °C | Both support industrial temperature ranges, so environmental tolerance is equivalent. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | 74HCT4051D | 74HCT11DB,112 |
|---|---|---|
| Supplier | - | Rochester Electronics, LLC,Nexperia USA Inc. |
| Series | - | 74HCT |
| Part Status | Active | Obsolete |
| Logic Type | - | AND Gate |
| Number of Circuits | 1 | 3 |
| Number of Inputs | - | 3 |
| Voltage - Supply | - | 4.5V ~ 5.5V |
| Current - Quiescent (Max) | - | 2 µA |
| Current - Output High Low | - | 4mA, 4mA |
| Logic Level - Low | - | 0.8V |
| Logic Level - High | - | 2V |
| Max Propagation Delay @ V Max CL | - | 24ns @ 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
Are the 74HCT4051D and 74HCT11DB,112 functionally interchangeable?
No. The 74HCT4051D is an 8-channel analog multiplexer/demultiplexer, while the 74HCT11DB,112 is a triple 3-input AND gate. They perform completely different logic and signal-routing functions and cannot be used as substitutes for one another.
What are the primary functions of the 74HCT4051D and 74HCT11DB,112?
The 74HCT4051D is a single 8-channel analog multiplexer/demultiplexer with three digital select inputs and an enable input. The 74HCT11DB,112 contains three independent 3-input AND gates.
Do the 74HCT4051D and 74HCT11DB,112 use the same package type?
No. The 74HCT4051D is supplied in a SO16 (SOIC-16) package, while the 74HCT11DB,112 is supplied in a SSOP-14 (DB) package. Package footprint, pin count, and PCB land pattern differ.
Are the supply voltage ranges of the 74HCT4051D and 74HCT11DB,112 the same?
Both are HCT-family devices and are specified for a nominal 5 V supply with a typical operating range of 4.5 V to 5.5 V. However, always confirm the exact limits in the respective manufacturer datasheet before design use.
Can the 74HCT4051D and 74HCT11DB,112 be used in the same circuit?
Yes, they can coexist in the same 5 V HCT logic system because they share compatible logic-level families, but they serve different roles: the 74HCT4051D routes analog or digital signals, while the 74HCT11DB,112 performs fixed 3-input AND logic.
Do the 74HCT4051D and 74HCT11DB,112 have the same pin count?
No. The 74HCT4051D has 16 pins in a SO16 package, and the 74HCT11DB,112 has 14 pins in a SSOP-14 package. Pin assignments and functions are not compatible.
Which device is better for analog signal switching: the 74HCT4051D or the 74HCT11DB,112?
The 74HCT4051D is the appropriate choice for analog signal switching because it is an analog multiplexer/demultiplexer. The 74HCT11DB,112 is a digital AND gate and is not intended for analog signal routing.
Are the 74HCT4051D and 74HCT11DB,112 both RoHS compliant?
RoHS compliance depends on the specific manufacturer part number and ordering suffix. Verify the current RoHS status for each exact orderable part on the manufacturer or authorized distributor page before assuming compliance.