74HC4051M

@@ -0,0 +1,59 @@+# 74HC4051M++**HGSEMI** · Signal Switches / Encoders & Decoders / Multiplexers · SOP-16++74HC4051M from HGSEMI, in a SOP-16. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.++## Pinout++| Pin | Name | Type | Function |+|---|---|---|---|+| 1 | Y4 | bidirectional | Independent analog input/output channel 4. Connects to common Z pin when A2:A0 = 100 and E is low. Analog signal range: VEE to VDD. |+| 2 | Y6 | bidirectional | Independent analog input/output channel 6. Connects to common Z pin when A2:A0 = 110 and E is low. Analog signal range: VEE to VDD. |+| 3 | Z | bidirectional | Common analog input/output. This pin is the shared node connected to whichever Yn channel is selected by A2:A0 while E is asserted low. |+| 4 | Y7 | bidirectional | Independent analog input/output channel 7. Connects to common Z pin when A2:A0 = 111 and E is low. Analog signal range: VEE to VDD. |+| 5 | Y5 | bidirectional | Independent analog input/output channel 5. Connects to common Z pin when A2:A0 = 101 and E is low. Analog signal range: VEE to VDD. |+| 6 | E | input | Active-low enable input. When low, one Yn channel selected by A2:A0 is connected to Z (low-impedance path). When high, all channels are disabled (high-impedance). |+| 7 | VEE | power_in | Negative analog supply voltage. Range: -6.0 V to 0 V. VDD-VEE must be 3-9 V. Tie to VSS for single-supply digital mux use. |+| 8 | VSS | power_in | Ground / digital logic reference (0 V). Reference for digital control inputs A0-A2 and E. |+| 9 | A2 | input | Channel-select address bit 2 (MSB). Together with A1 and A0 selects which Yn is routed to Z when E is low. Referenced between VSS and VDD. |+| 10 | A1 | input | Channel-select address bit 1. Together with A2 and A0 selects which Yn is routed to Z when E is low. |+| 11 | A0 | input | Channel-select address bit 0 (LSB). Together with A2 and A1 selects which Yn is routed to Z when E is low. |+| 12 | Y3 | bidirectional | Independent analog input/output channel 3. Connects to common Z pin when A2:A0 = 011 and E is low. Analog signal range: VEE to VDD. |+| 13 | Y0 | bidirectional | Independent analog input/output channel 0. Connects to common Z pin when A2:A0 = 000 and E is low. Analog signal range: VEE to VDD. |+| 14 | Y1 | bidirectional | Independent analog input/output channel 1. Connects to common Z pin when A2:A0 = 001 and E is low. Analog signal range: VEE to VDD. |+| 15 | Y2 | bidirectional | Independent analog input/output channel 2. Connects to common Z pin when A2:A0 = 010 and E is low. Analog signal range: VEE to VDD. |+| 16 | VDD | power_in | Positive supply voltage. Range: 3.0 V to 9.0 V (relative to VSS). Also the reference for digital control inputs. VDD-VEE must not exceed 9 V. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | HGSEMI |+| Package | SOP-16 |+| Category | Logic |+| Pins | 16 |++## Ordering variants++- `74HC4051MM/TR`+- `74HC4051MN`+- `74HC4051MMT/TR`+- `74HC4051MMS/TR`+- `74HC4051MLQ/TR`++## CAD (KiCad official)++- Symbol: `74HC4051M`+- Footprint: `Package_SO:SOIC-16_3.9x9.9mm_P1.27mm`+- 3D model: SOP-16 (KiCad packages3D, STEP)++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [HGSEMI datasheet](docs/74hc4051m-datasheet.pdf) (16 pp, sha256 `f2f56de053e5258f`, retrieved 2026-08-17, tier: lcsc)+- **Extractor:** `ds2sf` (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.+- **CAD:** KiCad official libraries (CC-BY-SA 4.0).++[Datasheet PDF](docs/74hc4051m-datasheet.pdf)

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