MC74HC4052ADR2G — Dual 4-Channel Analog Multiplexer/Demultiplexer with Low Crosstalk (SOP-16)

What Are the Technical Specifications of MC74HC4052ADR2G?

Key numbers that matter: Per the ON Semiconductor MC74HC4052A datasheet (Rev 8), the analog path spans the full VEE to VCC window — that is what makes this an analog part rather than a digital one. Bipolar audio and negative sensor rails work where a 595 or 138 never could.

The ~190Ω Ron is the number to respect: low enough for signals into high-impedance loads, real enough to corrupt a precision circuit if it ends up in a feedback path.

Read the pinout as two 4:1 switches, not one 8:1: X and Y are independent blocks — audio left and right, or two sensor banks, switched by the same A/B address.

The pin numbering looks scrambled (Y0 at pin 1, Y1 at pin 5) because the two commons sit between their own channels.

When Should You Use (and NOT Use) the MC74HC4052ADR2G?

✅ Use MC74HC4052ADR2G when:

• Routing audio or bipolar signals. With VEE tied to a negative rail, the switch passes signals from -5V to +5V — the 595 and 138 class cannot touch these.
• Multiplexing sensors into one ADC. Four (or eight, with both blocks) analog channels share a single ADC input. Keep the source impedance low and the Ron voltage drop fits the ADC's error budget.
• Gain switching in the inverting input path. Put the mux in series with the op-amp's inverting input — no feedback current flows through Ron, so it causes no gain error.
• 2.0V–12.0V analog rails. The wide VCC–VEE window covers 3.3V audio, 5V sensors, and 12V industrial signal levels.
• Break-before-make channel switching. The family's switching behavior keeps two channels from shorting together during a transition.

❌ Don't use MC74HC4052ADR2G when:

• The circuit needs 1% accuracy from a high-impedance source. The ~190Ω Ron is a voltage divider with your source impedance — for precision acquisition use a low-Ron mux (TMUX1109-class) or buffer first.
• The switch sits in an op-amp feedback loop. Ron in the feedback path changes the gain — a classic EEVblog failure mode where a 1/10/100 gain stage measured 1/1.1/2.16 instead. Move the mux out of the loop.
• Signals may exceed the supply rails. Inputs are diode-clamped to VEE and VCC — an over-range input conducts into the rails and produces crosstalk on every channel.
• You're switching the power path itself. 190Ω cannot carry load current — use a load switch, relay, or the TPIC6B595 for anything that powers something.

What Are the Alternatives to MC74HC4052ADR2G?

Pick by what crosses the switch. General analog routing — the 4052. One rail-limited signal — the 4051. Stereo or differential — the 4053. Precision — TMUX1109-class with Ron under 2Ω. And if over-voltage inputs are a real risk, ON's own datasheet points to the HC485xA family with injection protection.

What Are the Typical Applications of MC74HC4052ADR2G?

Four-Sensor ADC Front End: Four thermistor or sensor channels share one ADC input. Each channel is selected by A/B, the mux output feeds the ADC through a buffer — the buffer's high input impedance makes the 190Ω Ron irrelevant, and one ADC serves four sensors.

Stereo Audio Input Selection: Two 4052 blocks carry left and right channels, so a single A/B address picks one of four stereo sources. With VEE on a -5V rail, line-level audio swings without distortion, and the low crosstalk keeps channel separation clean.

Programmable-Gain Instrumentation: The mux selects feedback resistors in the inverting input path of an op-amp, not the feedback loop itself. Because no feedback current crosses the switch, the gain stays exact — the forum-proven way to use a 4052 in a precision stage.

Why the buffer earns its place: the ADC input impedance is high, but the sensor might be a high-impedance source too — and 190Ω in series with a 10kΩ source is a 2% error. A unity-gain buffer between mux and ADC makes the switch resistance disappear entirely.

Why Buy MC74HC4052ADR2G from ICMASS?

Genuine ON silicon, tested for the family swap. The 4051/4052/4053 trio shares a body but not a topology — we verify channel count and the dual-block routing on incoming lots so the switch you get matches the address map you wrote.

Analog + logic families in one shipment. You're ordering the 4052 for analog routing, the 595 for outputs, and the 138 for decode — we stock the ON and TI families from Shenzhen with same-day dispatch.

Cross-reference support. Not sure whether your front end needs the general 4052, the 8:1 4051, or a precision TMUX-class part? Tell us the signal level, the source impedance, and the accuracy budget — we'll confirm the right switch before you commit the BOM.

Frequently Asked Questions About MC74HC4052ADR2G

Q1: What is the MC74HC4052ADR2G?

A: A dual 4-channel analog multiplexer/demultiplexer — two independent 4:1 switches in one SOP-16. ON Semiconductor's version routes analog signals from VEE to VCC with a typical on-resistance around 190Ω, controlled by two address bits and one enable.

Q2: What is the on-resistance of the 74HC4052?

A: About 190Ω typical — roughly 210Ω at 4.5V, down to 160Ω with a -4.5V VEE. Ron varies with the input signal voltage, which is why precision circuits treat it as a design parameter rather than a fixed value.

Q3: Can the 74HC4052 switch negative voltages?

A: Yes — with VEE tied to a negative rail, the analog path spans from VEE to VCC. Audio and bipolar sensor signals down to -6V work fine. Without VEE (tied to GND), only unipolar signals pass.

Q4: Why is my gain wrong when I use the 4052 in a feedback loop?

A: Ron sits in the feedback path and adds to the resistor values — the gain changes. One EEVblog build intended 1/10/100 gains and measured about 1/1.1/2.16 instead. Put the mux in series with the op-amp's inverting input, where no feedback current crosses it.

Q5: Why does my ADC reading drop when I switch channels?

A: Ron plus the source impedance forms a voltage divider. A CD4052B user saw a 0.1V drop at 30–40kHz sampling with a high-impedance source. Buffer the mux output, or move to a lower-Ron part for precision acquisition.

Q6: What's the difference between 74HC4052 and CD4052B?

A: Process and performance — the HC version has improved Ron linearity, lower Ron, and better noise. The MC74HC4052A replaces the older metal-gate MC14052B with a silicon-gate design, and it is pin-compatible with it.

Q7: My channels crosstalk when I hit a piezo sensor. Why?

A: The input signal exceeds VCC and the protection diodes conduct into the rails. Ten chips behaved identically in a documented case — the fix was limiting the signal amplitude below VCC, not replacing the mux.

Q8: What logic level do A, B and EN need?

A: A logic high must be close to VCC — this family does not accept weak logic-high levels. A real design failure was traced to a botched level translator starving the select inputs. The HCT version has different (TTL) input thresholds if your driver can't reach VCC.

Q9: Can I use the 74HC4052 for audio switching?

A: Yes — but audio is bipolar, so VEE must carry a negative rail or the signal clips. TI E2E and diyAudio threads on CD4052 audio selectors confirm the setup: VCC at +5V, VEE at -5V, one block per channel. The HC version's isolation (better than -90dB in the 20–25kHz band) beats the old CD4052's -60dB, and switching clicks are the remaining trade-off.

Q10: How much does MC74HC4052ADR2G cost and is it in stock?

A: Volume pricing typically ranges from $0.06–$0.15/unit depending on quantity and date code. ICMASS stocks MC74HC4052ADR2G in SOP-16 and ships same-day from Shenzhen. Contact us for a quote on your specific quantity.