CD74HC4051PWR

@@ -0,0 +1,63 @@+# CD74HC4051PWR++**Texas Instruments** · Signal Switches / Encoders & Decoders / Multiplexers · TSSOP-16++CD74HC4051PWR from Texas Instruments, in a TSSOP-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 | A4 | bidirectional | Channel 4 in/out. Bidirectional analog switch terminal; connected to COM (pin 3) when selected via S2:S0 = 100 and !E is low. |+| 2 | A6 | bidirectional | Channel 6 in/out. Bidirectional analog switch terminal; connected to COM (pin 3) when selected via S2:S0 = 110 and !E is low. |+| 3 | COM | bidirectional | Common out/in. Shared analog terminal connected to one of A0..A7 based on address inputs S0..S2. Bidirectional analog signal path. |+| 4 | A7 | bidirectional | Channel 7 in/out. Bidirectional analog switch terminal; connected to COM (pin 3) when selected via S2:S0 = 111 and !E is low. |+| 5 | A5 | bidirectional | Channel 5 in/out. Bidirectional analog switch terminal; connected to COM (pin 3) when selected via S2:S0 = 101 and !E is low. |+| 6 | ~{E} | input | Enable, active low. When low, the selected channel is connected to COM. When high, all switches are disabled (high impedance). |+| 7 | VEE | power_in | Negative analog supply. Sets the lower limit of the analog signal range. Recommended range 0 V to -6 V; VCC-VEE must be 2 V to 10 V. |+| 8 | GND | power_in | Ground / digital and logic reference (0 V). All voltages are referenced to this pin unless otherwise specified. |+| 9 | S2 | input | Channel select bit 2 (MSB). Digital input selecting which of A0..A7 is routed to COM. LSTTL/CMOS-level input; VIH >= 2 V, VIL <= 0.8 V (HCT). |+| 10 | S1 | input | Channel select bit 1. Digital input selecting which of A0..A7 is routed to COM. LSTTL/CMOS-level input. |+| 11 | S0 | input | Channel select bit 0 (LSB). Digital input selecting which of A0..A7 is routed to COM. LSTTL/CMOS-level input. |+| 12 | A3 | bidirectional | Channel 3 in/out. Bidirectional analog switch terminal; connected to COM (pin 3) when selected via S2:S0 = 011 and !E is low. |+| 13 | A0 | bidirectional | Channel 0 in/out. Bidirectional analog switch terminal; connected to COM (pin 3) when selected via S2:S0 = 000 and !E is low. |+| 14 | A1 | bidirectional | Channel 1 in/out. Bidirectional analog switch terminal; connected to COM (pin 3) when selected via S2:S0 = 001 and !E is low. |+| 15 | A2 | bidirectional | Channel 2 in/out. Bidirectional analog switch terminal; connected to COM (pin 3) when selected via S2:S0 = 010 and !E is low. |+| 16 | VCC | power_in | Positive digital/analog supply. Recommended 2 V to 6 V for HC parts (4.5 V to 5.5 V for HCT). Sets the upper limit of the analog signal range. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | Texas Instruments |+| Package | TSSOP-16 |+| Category | Logic |+| Pins | 16 |++## Ordering variants++- `CD74HC4051PWRPW`+- `CD74HC4051PWRPWR`+- `CD74HC4051PWRD`+- `CD74HC4051PWRDR`+- `CD74HC4051PWRNS`+- `CD74HC4051PWRNSR`+- `CD74HC4051PWRN`+- `CD74HC4051PWRNE`+- `CD74HC4051PWRJ`++## CAD (KiCad official)++- Symbol: `CD74HC4051PWR`+- Footprint: `Package_SO:TSSOP-16_4.4x5mm_P0.65mm`+- 3D model: TSSOP-16 (KiCad packages3D, STEP)++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [Texas Instruments datasheet](https://www.ti.com/lit/ds/symlink/cd74hc4051.pdf) (50 pp, sha256 `7bf0d4b1a02045fc`, retrieved 2026-08-17, tier: manufacturer)+- **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/cd74hc4051pwr-datasheet.pdf)

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