SN74LVC138APWR

@@ -0,0 +1,63 @@+# SN74LVC138APWR++**Texas Instruments** · Signal Switches / Encoders & Decoders / Multiplexers · TSSOP-16++SN74LVC138APWR 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 | A | input | Address/select input A (LSB of 3-bit binary select). CMOS input, accepts 0 to 5.5 V regardless of VCC. |+| 2 | B | input | Address/select input B (middle bit of 3-bit binary select). CMOS input, accepts 0 to 5.5 V regardless of VCC. |+| 3 | C | input | Address/select input C (MSB of 3-bit binary select). CMOS input, accepts 0 to 5.5 V regardless of VCC. |+| 4 | G2A | input | Active-low enable input. All outputs are forced high (inactive) when G2A is high. |+| 5 | G2B | input | Active-low enable input. All outputs are forced high (inactive) when G2B is high. |+| 6 | G1 | input | Active-high enable input. All outputs are forced high (inactive) when G1 is low. |+| 7 | Y7 | output | Active-low decoded output 7. Asserted low when C=1, B=1, A=1 and all enables are active. Push-pull CMOS output, ±24 mA drive at VCC=3.3 V. |+| 8 | GND | power_in | Ground reference (0 V). |+| 9 | Y6 | output | Active-low decoded output 6. Asserted low when C=1, B=1, A=0 and all enables are active. Push-pull CMOS output, ±24 mA drive at VCC=3.3 V. |+| 10 | Y5 | output | Active-low decoded output 5. Asserted low when C=1, B=0, A=1 and all enables are active. Push-pull CMOS output, ±24 mA drive at VCC=3.3 V. |+| 11 | Y4 | output | Active-low decoded output 4. Asserted low when C=1, B=0, A=0 and all enables are active. Push-pull CMOS output, ±24 mA drive at VCC=3.3 V. |+| 12 | Y3 | output | Active-low decoded output 3. Asserted low when C=0, B=1, A=1 and all enables are active. Push-pull CMOS output, ±24 mA drive at VCC=3.3 V. |+| 13 | Y2 | output | Active-low decoded output 2. Asserted low when C=0, B=1, A=0 and all enables are active. Push-pull CMOS output, ±24 mA drive at VCC=3.3 V. |+| 14 | Y1 | output | Active-low decoded output 1. Asserted low when C=0, B=0, A=1 and all enables are active. Push-pull CMOS output, ±24 mA drive at VCC=3.3 V. |+| 15 | Y0 | output | Active-low decoded output 0. Asserted low when C=0, B=0, A=0 and all enables are active. Push-pull CMOS output, ±24 mA drive at VCC=3.3 V. |+| 16 | VCC | power_in | Supply voltage, 1.65 V to 3.6 V operating range (absolute max 4.6 V). |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | Texas Instruments |+| Package | TSSOP-16 |+| Category | Logic |+| Pins | 16 |++## Ordering variants++Same part, different packaging or reel option.++- `SN74LVC138APWR`+- `SN74LVC138APWRDR`+- `SN74LVC138APWRD`+- `SN74LVC138APWRRGYR`+- `SN74LVC138APWRRGY`+- `SN74LVC138APWRDBR`+- `SN74LVC138APWRDB`++## CAD (KiCad official)++- Symbol: `SN74LVC138APWR`+- 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/sn74lvc138a.pdf) (40 pp, sha256 `ac45cc709217a5b8`, 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/sn74lvc138apwr-datasheet.pdf)

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