CD4081B Quad AND Gate

@@ -0,0 +1,76 @@+# CD4081B++**Texas Instruments** · Logic Gate · SOIC-14++The CD4081B contains four independent 2-input AND gates in the 4000B CMOS family; each output is high only when both inputs are high. It runs from 3 V to 18 V.++## Pinout++| Pin | Name | Type | Function |+|---|---|---|---|+| 1 | 1A | input | Gate 1 input A. CMOS logic input, high-impedance; protected by CMOS input protection network. Recommended VIH ≥ 3.5 V at VDD=5 V. |+| 2 | 1B | input | Gate 1 input B. CMOS logic input paired with pin 1 to drive AND gate 1. |+| 3 | 1Y | output | Gate 1 output, J = 1A · 1B. Symmetrical CMOS push-pull output; IOH/IOL ≈ 1 mA at VDD=5 V. |+| 4 | 2Y | output | Gate 2 output, K = 2A · 2B. Symmetrical CMOS push-pull output. |+| 5 | 2A | input | Gate 2 input A. CMOS logic input. |+| 6 | 2B | input | Gate 2 input B. CMOS logic input paired with pin 5 to drive AND gate 2. |+| 7 | VSS | power_in | Negative supply / ground reference (0 V). Common return for all four gates. |+| 8 | 3A | input | Gate 3 input A. CMOS logic input. |+| 9 | 3B | input | Gate 3 input B. CMOS logic input paired with pin 8 to drive AND gate 3. |+| 10 | 3Y | output | Gate 3 output, L = 3A · 3B. Symmetrical CMOS push-pull output. |+| 11 | 4Y | output | Gate 4 output, M = 4A · 4B. Symmetrical CMOS push-pull output. |+| 12 | 4A | input | Gate 4 input A. CMOS logic input. |+| 13 | 4B | input | Gate 4 input B. CMOS logic input paired with pin 12 to drive AND gate 4. |+| 14 | VDD | power_in | Positive supply. Recommended 3 V ≤ VDD ≤ 18 V (absolute max −0.5 V to +20 V referenced to VSS). Decouple to VSS with a local bypass capacitor. |++## Key specifications++| Parameter | Value |+|---|---|+| Type | Quad AND Gate |+| Logic family | 4000B (CMOS) |+| Supply voltage | 3 V to 18 V |+| Propagation delay | 45 ns typ at 10 V |+| Operating temperature | -55 C to 125 C |++## Ordering variants++- `CD4081BE`+- `CD4081BEE4`+- `CD4081BF`+- `CD4081BF3A`+- `CD4081BAS2534`+- `CD4081BM`+- `CD4081BM96`+- `CD4081BME4`+- `CD4081BMG4`+- `CD4081BMT`+- `CD4081BMTE4`+- `CD4081BMTG4`+- `CD4081BM96E4`+- `CD4081BM96G4`+- `CD4081BNSR`+- `CD4081BNSRE4`+- `CD4081BNSRG4`+- `CD4081BPW`+- `CD4081BPWR`+- `CD4081BPWE4`+- `CD4081BPWG4`+- `CD4081BPWRE4`+- `CD4081BPWRG4`++## CAD (KiCad official)++- Symbol: `cd4081.kicad_sym`+- Footprint: `cd4081.kicad_mod`+- 3D model: SOIC-14 body from KiCad `Package_SO/SOIC-14_3.9x8.7mm_P1.27mm`.++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [Texas Instruments datasheet](https://www.ti.com/lit/ds/symlink/cd4081b.pdf) (34 pp, sha256 `0eed8b8607c5c076`, 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/cd4081-datasheet.pdf)

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