Part A
74HCT4052D
Toshiba Semiconductor et stockage
- Lifecycle
- Active
- Stock
- 3196 PCS
- Package
- SOIC-16
- Series
- Interfaces - commutateurs analogiques, multiplexeurs, démultiplexeurs
Replacement verdict
Not a drop-in replacement
The 74HCT4052D and 74HCT7403D,518 are functionally unrelated devices and cannot serve as substitutes for one another. The 74HCT4052D is a dual 4-channel analog multiplexer/demultiplexer, while the 74HCT7403D,518 is a quad 2-input open-collector NAND gate. Their signal paths, logic functions, and pin configurations are fundamentally different, making direct replacement impossible without complete circuit redesign.
Different logic function
Different signal type
Different output configuration
Different pinout
Parts at a glance
Part B
74HCT7403D,518
NXP USA Inc.
- Lifecycle
- Active
- Stock
- 3207 PCS
- Package
- SOIC-16
- Series
- Logique - mémoire FIFO
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | 74HCT4052D | 74HCT7403D,518 | Why it matters |
|---|---|---|---|
| Function | Dual 4-channel analog multiplexer/demultiplexer | Quad 2-input NAND gate with open-drain outputs | These devices perform completely different logic functions, so they are not functionally substitutable in a circuit. |
| Logic Family | HCT (High-speed CMOS, TTL compatible) | HCT (High-speed CMOS, TTL compatible) | Both belong to the HCT family, so they share similar input threshold and supply voltage compatibility with TTL logic. |
| Supply Voltage Range | 4.5 V to 5.5 V | 4.5 V to 5.5 V | Both operate over the standard 5 V logic supply range, allowing use in common 5 V systems. |
| Number of Channels | 2 channels (each 4:1 multiplexer) | 4 gates (each 2-input NAND) | Channel count and configuration determine how many signals can be routed or processed simultaneously. |
| Output Type | Analog/digital bidirectional switch | Open-drain digital output | Output type affects interfacing, drive capability, and whether external pull-up resistors are required. |
| Propagation Delay | Typically 8 ns at 5 V | Typically 12 ns at 5 V | Propagation delay influences maximum operating speed and timing margins in digital systems. |
| Package | SO16 (SOIC-16) | SO14 (SOIC-14) | Different package sizes and pin counts affect PCB layout, footprint, and mechanical compatibility. |
| Pin Count | 16 | 14 | Pin count determines the physical footprint and available I/O connections on the board. |
| Operating Temperature Range | -40 °C to +125 °C | -40 °C to +125 °C | Both support industrial temperature ranges, making them suitable for harsh environments. |
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Send your BOM and application constraints for technical and sourcing review.
Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | 74HCT4052D | 74HCT7403D,518 |
|---|---|---|
| Supplier | - | NXP USA Inc. |
| Series | - | 74HCT |
| Part Status | Active | Obsolete |
| Memory Size | - | 256 (64 x 4) |
| Function | - | Asynchronous, Synchronous |
| Data Rate | - | 30MHz |
| Access Time | - | 61ns |
| Voltage - Supply | - | 4.5 V ~ 5.5 V |
| Current - Supply (Max) | - | 1mA |
| Bus Directional | - | Uni-Directional |
| Expansion Type | - | Depth, Width |
| Programmable Flags Support | - | No |
| Retransmit Capability | - | No |
| FWFT Support | - | No |
| Operating Temperature | -40°C ~ 125°C (TA) | -40°C ~ 125°C |
| Mounting Type | Surface Mount | Surface Mount |
| Switch Circuit | DP4T | - |
| Multiplexer / Demultiplexer Circuit | 4:1 | - |
| Number of Circuits | 2 | - |
| On - State Resistance(Max) | 150Ohm | - |
| 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) | 60ns, 48ns | - |
| -3 dB Bandwidth | 180MHz | - |
| Channel Capacitance(CS(off)CD(off)) | 3.5pF | - |
| Current - Leakage(IS(off))(Max) | 2µA | - |
| Crosstalk | -60dB @ 1MHz | - |
Frequently asked questions
Are the 74HCT4052D and 74HCT7403D,518 functionally equivalent or interchangeable?
No. The 74HCT4052D is a dual 4-channel analog multiplexer/demultiplexer, while the 74HCT7403D,518 is a quad 2-input NAND buffer with open-collector outputs. They perform entirely different logic and signal-routing functions and are not interchangeable.
What are the primary functions of the 74HCT4052D and 74HCT7403D,518?
The 74HCT4052D is a differential 4-channel analog multiplexer/demultiplexer that selects one of four differential input pairs or routes a differential signal to one of four outputs. The 74HCT7403D,518 contains four independent 2-input NAND gates with open-collector outputs, intended for logic gating and wired-OR/wired-AND bus applications.
Do the 74HCT4052D and 74HCT7403D,518 use the same package and pinout?
No. The 74HCT4052D is supplied in a SO16 (16-pin small outline) package, while the 74HCT7403D,518 is supplied in a SO14 (14-pin small outline) package. Pin counts, pin assignments, and PCB land patterns differ, so they are not drop-in replacements for each other.
Can the 74HCT4052D and 74HCT7403D,518 operate from the same supply voltage?
Both are HCT-family devices and are specified for a nominal 5 V supply with a recommended operating range of 4.5 V to 5.5 V. However, their input thresholds, output structures, and logic functions differ, so supply compatibility alone does not make them interchangeable.
What are the key differences in output characteristics between the 74HCT4052D and 74HCT7403D,518?
The 74HCT4052D provides bidirectional analog signal paths with low on-resistance and can pass analog or digital signals within its specified signal range. The 74HCT7403D,518 provides open-collector digital outputs that require external pull-up resistors and are intended for logic-level wired-OR/wired-AND configurations, not analog signal routing.
Are the 74HCT4052D and 74HCT7403D,518 suitable for the same circuit applications?
No. The 74HCT4052D is used for analog and digital signal multiplexing/demultiplexing, such as sensor selection, audio/video routing, and data acquisition channel switching. The 74HCT7403D,518 is used for digital logic gating, bus interfacing, and open-collector wired logic. Their application domains do not overlap directly.
Do both devices have the same operating temperature range?
Both the 74HCT4052D and 74HCT7403D,518 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 variant. Designers must verify the specific datasheet for the ordered part number, as temperature grades can differ between suppliers and product versions.
Can the 74HCT4052D be used to replace the 74HCT7403D,518 in a logic circuit?
No. The 74HCT4052D cannot implement the NAND logic function or the open-collector output behavior of the 74HCT7403D,518. Substitution would require redesigning the logic and output interface, and is not a valid direct replacement.