Part A
74HC4066D
Toshiba Semiconductor et stockage
- Lifecycle
- Active
- Stock
- 7546 PCS
- Package
- SOIC-14
- Series
- Interfaces - commutateurs analogiques, multiplexeurs, démultiplexeurs
Replacement verdict
Not a drop-in replacement
The 74HC4052D and 74HC4066D are not drop-in replacements for each other. Although both are HC-family analog switches in the same SOIC-16 package, they differ fundamentally in switch architecture, channel count, and control logic, requiring PCB and firmware changes before substitution.
Different switch architecture
Different channel count
Different control logic
Different on-resistance
Parts at a glance
Part B
74HC4052D
Toshiba Semiconductor et stockage
- Lifecycle
- Active
- Stock
- 5305 PCS
- Package
- SOIC-16
- Series
- Interfaces - commutateurs analogiques, multiplexeurs, démultiplexeurs
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | 74HC4052D | 74HC4066D | Why it matters |
|---|---|---|---|
| Function / Configuration | Dual 4-channel analog multiplexer/demultiplexer | Quad single-pole single-throw (SPST) analog switch | Determines the switching topology; a multiplexer routes one of several inputs to a common output, while independent SPST switches cannot perform multiplexing without external wiring. |
| Number of Channels / Switches | 2 channels (each 4:1), 8 switch positions total | 4 independent bilateral switches | Channel count defines how many signals can be routed or gated simultaneously in a design. |
| Control Inputs | 2 binary select lines plus 1 inhibit/enable per device | 1 independent control input per switch (4 total) | Different control schemes affect logic interfacing, PCB routing, and firmware/GPIO requirements. |
| On-Resistance (R_ON) | Typically ~80 Ω at V_CC = 4.5 V | Typically ~50 Ω at V_CC = 4.5 V | Lower on-resistance reduces signal attenuation and voltage drop, which is critical for analog signal integrity. |
| On-Resistance Matching / Flatness | R_ON matching between channels typically ~5 Ω | R_ON matching between switches typically ~5 Ω | Matching and flatness affect distortion and channel-to-channel consistency in precision analog applications. |
| Propagation Delay | Typically ~7 ns at V_CC = 4.5 V | Typically ~4 ns at V_CC = 4.5 V | Delay influences maximum usable switching frequency and timing margins in high-speed signal paths. |
| Package | SO16 (16-pin small outline) | SO14 (14-pin small outline) | Different pin counts and footprints prevent direct drop-in replacement on an existing PCB. |
| Supply Voltage Range | 2 V to 10 V (HC family) | 2 V to 10 V (HC family) | Compatible supply ranges allow both devices to operate in similar logic-level systems. |
| Analog Signal Range | V_EE to V_CC (can pass signals below ground with negative V_EE) | V_SS to V_DD (typically 0 V to V_CC in single-supply use) | Defines whether the switch can handle bipolar or negative-going analog signals without clipping. |
| Typical Application | Signal multiplexing, data selection, audio/video routing | Signal gating, sample-and-hold, programmable gain, general analog switching | Intended use cases differ; substituting one for the other may require redesign of the surrounding circuit. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | 74HC4066D | 74HC4052D |
|---|---|---|
| Part Status | Active | Active |
| Multiplexer / Demultiplexer Circuit | 1:1 | 4:1 |
| Number of Circuits | 4 | 2 |
| On - State Resistance(Max) | 80Ohm | 130Ohm |
| Channel - to - Channel Matching(ΔRon) | 5Ohm (Typ) | 4Ohm |
| Voltage - Supply, Single (V+) | 2V ~ 12V | 2V ~ 6V |
| Switch Time(Ton Toff)(Max) | 12ns, 12ns | 34ns, 32ns |
| -3 dB Bandwidth | 200MHz | - |
| Channel Capacitance(CS(off)CD(off)) | 3pF | 10pF |
| Current - Leakage(IS(off))(Max) | 100nA | 1µA |
| Crosstalk | -60dB @ 1MHz | -50dB @ 1MHz |
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 85°C (TA) |
| Mounting Type | Surface Mount | Surface Mount |
| Switch Circuit | - | SP4T |
Frequently asked questions
What is the main functional difference between the 74HC4052D and the 74HC4066D?
The 74HC4052D is a dual 4-channel analog multiplexer/demultiplexer with a common channel selection input, while the 74HC4066D contains four independent bilateral analog switches, each with its own control input. The 74HC4052D routes one of four inputs to a common output per section, whereas the 74HC4066D simply opens or closes each switch independently.
Are the 74HC4052D and 74HC4066D pin-compatible?
No. The 74HC4052D is typically supplied in a 16-pin SOIC package with channel-select and inhibit pins, while the 74HC4066D is typically supplied in a 14-pin SOIC package with four independent switch control pins. Pin count, pin functions, and PCB land patterns differ, so they are not direct drop-in replacements.
Can the 74HC4052D and 74HC4066D operate from the same supply voltage range?
Yes. Both devices are members of the 74HC family and are specified for a wide supply voltage range, typically 2 V to 6 V for 74HC types, with some manufacturers also specifying 2 V to 10 V for the 74HCT variants. Always confirm the exact limits in the specific manufacturer datasheet.
Which device has lower on-resistance, the 74HC4052D or the 74HC4066D?
Both the 74HC4052D and 74HC4066D use similar CMOS transmission-gate structures, so their typical on-resistance values are comparable for a given supply voltage and temperature. Actual on-resistance depends on supply voltage, input signal level, and load current, and must be verified from the manufacturer datasheet for the specific part number.
Can the 74HC4052D be used to replace the 74HC4066D in an existing design?
Not directly. The 74HC4052D provides multiplexed 4:1 routing with shared control logic, while the 74HC4066D provides four independent SPST switches. Replacing one with the other requires redesigning the control interface, signal routing, and PCB layout, and the replacement must be validated against the target design requirements.
Do both the 74HC4052D and 74HC4066D support bidirectional analog signal switching?
Yes. Both devices are bilateral analog switches/multiplexers and can pass analog signals in either direction within the specified signal range. The 74HC4052D routes signals between selected channels and a common node, while each 74HC4066D switch conducts bidirectionally when enabled.
What are the typical operating temperature ranges for the 74HC4052D and 74HC4066D?
Standard commercial-grade versions of both devices are typically specified for -40 °C to +85 °C, while industrial-grade versions are often specified for -40 °C to +125 °C. The exact temperature range depends on the manufacturer and package variant, so the specific datasheet must be consulted.
Are the 74HC4052D and 74HC4066D available in comparable package options?
Both devices are commonly available in SOIC, TSSOP, and sometimes DIP packages, but the 74HC4052D is a 16-pin device and the 74HC4066D is a 14-pin device. Package outlines and pin counts differ, so they are not interchangeable without layout changes.