74HC4067 16-Channel Analog Multiplexer
16-channel bidirectional analog/digital multiplexer/demultiplexer. A 4-bit binary address on S0–S3 selects one of 16 I/O channels (Y0–Y15) to connect to the common SIG/Z pin. An active-LOW enable (EN/INH) pin disables all channels when HIGH.
Pinout
- VCC
Supply voltage; 3.3V–5V range; use 3.3V for direct ESP32 logic compatibility
Type · powerVoltage · 3.3 - GND
Common ground — must be shared with ESP32 ground rail
Type · ground - S0
Address bit 0 — shared with second MUX; driven by one ESP32 GPIO
Type · digital - S1
Address bit 1 — shared with second MUX; driven by one ESP32 GPIO
Type · digital - S2
Address bit 2 — shared with second MUX; driven by one ESP32 GPIO
Type · digital - S3
Address bit 3 — shared with second MUX; driven by one ESP32 GPIO
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