Part A
74HC4051D,653
Nexperia Hoa Kỳ Inc.
- Lifecycle
- Active
- Stock
- 4375 PCS
- Series
- Interface - Analog Switches, Multiplexers, Demultiplexers
Replacement verdict
Not a drop-in replacement
The 74HC4051D,653 and 74HC4538D are functionally unrelated devices and cannot serve as substitutes for one another. The 74HC4051D,653 is an 8-channel analog multiplexer/demultiplexer, while the 74HC4538D is a dual retriggerable precision monostable multivibrator. Their core functions, pin configurations, and signal paths are fundamentally different, making direct replacement impossible without complete circuit redesign.
Different device function
Different pinout
Different signal path
Different application role
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | 74HC4051D,653 | 74HC4538D | Why it matters |
|---|---|---|---|
| Function | 8-channel analog multiplexer/demultiplexer | Dual retriggerable monostable multivibrator | These devices perform fundamentally different logic functions, so they are not functionally substitutable in a circuit. |
| Number of Channels | 1 multiplexer with 8 channels | 2 monostable multivibrators | Channel count determines how many signals can be routed or timed independently. |
| Supply Voltage Range | 2.0 V to 10.0 V | 2.0 V to 6.0 V | The allowable supply voltage range affects compatibility with the rest of the system and available logic levels. |
| Propagation Delay | Typically 4 ns at 5 V (switch turn-on/turn-off times) | Typically 25 ns at 5 V | Propagation delay influences maximum operating speed and timing accuracy in the application. |
| Output Current | ±25 mA per switch | ±5.2 mA per output | Output current capability determines the load that can be driven directly without external buffering. |
| Package | SO16 (16-pin small outline) | SO16 (16-pin small outline) | Package compatibility affects PCB footprint and assembly, though identical packages do not imply functional equivalence. |
| Operating Temperature Range | -40 °C to +125 °C | -40 °C to +125 °C | The temperature range must cover the application environment for reliable operation. |
| Logic Family | HC (high-speed CMOS) | HC (high-speed CMOS) | Logic family determines input thresholds, noise immunity, and interfacing compatibility with other logic devices. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | 74HC4051D,653 | 74HC4538D |
|---|---|---|
| Series | - | 74HC |
| Part Status | Active | Active |
| Logic Type | - | Monostable |
| Independent Circuits | - | 2 |
| Schmitt Trigger Input | - | Yes |
| Propagation Delay | - | 25 ns |
| Current - Output High Low | - | 5.2mA, 5.2mA |
| Voltage - Supply | - | 2 V ~ 6 V |
| Operating Temperature | -40°C ~ 125°C (TA) | -40°C ~ 125°C (TA) |
| Mounting Type | Surface Mount | Surface Mount |
| Base Product Number | 74HC4051 | - |
| Multiplexer / Demultiplexer Circuit | 8:1 | - |
| Number of Circuits | 1 | - |
| On - State Resistance (Max) | 120Ohm | - |
| Channel - to - Channel Matching (ΔRon) | 6Ohm | - |
| Voltage - Supply, Single (V+) | 2V ~ 10V | - |
| Voltage - Supply, Dual (V±) | ±1.5V ~ 5V | - |
| Switch Time (Ton, Toff) (Max) | 51ns, 42ns | - |
| -3 dB Bandwidth | 180MHz | - |
| Channel Capacitance (CS(off), CD(off)) | 3.5pF | - |
| Current - Leakage (IS(off)) (Max) | 400nA | - |
| Packaging | Cut Tape (CT), Tape & Reel (TR) | - |
Frequently asked questions
What are the primary functions of the 74HC4051D,653 and the 74HC4538D?
The 74HC4051D,653 is an 8-channel analog multiplexer/demultiplexer that selects one of eight analog inputs/outputs via a 3-bit binary address. The 74HC4538D is a dual retriggerable precision monostable multivibrator that generates output pulses with a width determined by external timing components (R and C).
Can the 74HC4051D,653 and 74HC4538D be used interchangeably in a circuit?
No. They perform fundamentally different functions. The 74HC4051D,653 is an analog switch/multiplexer, while the 74HC4538D is a timing/pulse-generation device. Substitution would require a complete redesign of the surrounding circuitry.
What are the key supply voltage and logic-level specifications for both devices?
Both devices are members of the 74HC family and operate over a supply voltage range of 2.0 V to 6.0 V. They provide CMOS logic-level compatibility, with standard 74HC input thresholds and output drive characteristics as specified in their respective manufacturer datasheets.
How do the package and pinout of the 74HC4051D,653 and 74HC4538D compare?
The 74HC4051D,653 is supplied in a 16-pin SOIC package (D suffix). The 74HC4538D is also supplied in a 16-pin SOIC package. However, their pin functions and internal configurations differ, so they are not pin-to-pin compatible despite sharing the same package type and pin count.
What are the typical applications for the 74HC4051D,653?
The 74HC4051D,653 is typically used for analog signal routing, multiplexing sensor inputs to an ADC, signal demultiplexing, and audio/video signal switching in systems requiring low on-resistance and low leakage.
What are the typical applications for the 74HC4538D?
The 74HC4538D is typically used for pulse generation, timing delays, pulse stretching, frequency division, and debouncing circuits where a precise, retriggerable output pulse width is required.
Do both devices support operation over the industrial temperature range?
Yes. Both the 74HC4051D,653 and 74HC4538D are specified for the industrial temperature range of -40 °C to +125 °C, as stated in their respective manufacturer datasheets.
What are the key electrical differences between the 74HC4051D,653 and 74HC4538D?
The 74HC4051D,653 is characterized by parameters such as on-resistance, off-leakage current, and propagation delay through the analog switch. The 74HC4538D is characterized by output pulse width accuracy, retrigger time, and timing component linearity. These parameters are not directly comparable because the devices serve different functions.