CD74AC257M96

@@ -0,0 +1,64 @@+# CD74AC257M96++**Texas Instruments** · Signal Switches, Multiplexers, Decoders · SOIC-16++CD74AC257M96 from Texas Instruments, in a SOIC-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 | S | input | Select input. Chooses which data input (I0 or I1) is routed to each Y output. When S=L, I0 is selected; when S=H, I1 is selected (with OE low). |+| 2 | 1I0 | input | Channel 1, data input 0. Routed to 1Y when S=L and OE=L. |+| 3 | 1I1 | input | Channel 1, data input 1. Routed to 1Y when S=H and OE=L. |+| 4 | 1Y | tri_state | Channel 1 mux output (non-inverting). 3-state; Hi-Z when OE=H. ±24 mA drive at VCC=4.5 V. |+| 5 | 2I0 | input | Channel 2, data input 0. Routed to 2Y when S=L and OE=L. |+| 6 | 2I1 | input | Channel 2, data input 1. Routed to 2Y when S=H and OE=L. |+| 7 | 2Y | tri_state | Channel 2 mux output (non-inverting). 3-state; Hi-Z when OE=H. ±24 mA drive at VCC=4.5 V. |+| 8 | GND | power_in | Ground reference (0 V) for the device. |+| 9 | 3Y | tri_state | Channel 3 mux output (non-inverting). 3-state; Hi-Z when OE=H. ±24 mA drive at VCC=4.5 V. |+| 10 | 3I1 | input | Channel 3, data input 1. Routed to 3Y when S=H and OE=L. |+| 11 | 3I0 | input | Channel 3, data input 0. Routed to 3Y when S=L and OE=L. |+| 12 | 4Y | tri_state | Channel 4 mux output (non-inverting). 3-state; Hi-Z when OE=H. ±24 mA drive at VCC=4.5 V. |+| 13 | 4I1 | input | Channel 4, data input 1. Routed to 4Y when S=H and OE=L. |+| 14 | 4I0 | input | Channel 4, data input 0. Routed to 4Y when S=L and OE=L. |+| 15 | ~{OE} | input | Output Enable, active low. When OE=L the selected data appears at the Y outputs; when OE=H, all Y outputs are placed in a high-impedance (3-state) state regardless of S/I inputs. |+| 16 | VCC | power_in | Positive supply voltage. AC type: 1.5 V to 5.5 V; ACT type: 4.5 V to 5.5 V. Absolute max 6 V. Decouple with 0.1 µF (and optional 1 µF in parallel) close to the pin. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | Texas Instruments |+| Package | SOIC-16 |+| Category | Logic |+| Pins | 16 |++## Ordering variants++Same part, different packaging or reel option.++- `CD74AC257M96`+- `CD74AC257M96M`+- `CD74AC257M96E`+- `CD74AC257M96EE4`+- `CD74AC257M96PWR`+- `CD74AC257M96BQBR`+- `CD74AC257M96F3A`++## CAD (KiCad official)++- Symbol: `CD74AC257M96`+- Footprint: `Package_SO:SOIC-16_3.9x9.9mm_P1.27mm`+- 3D model: SOIC-16 (KiCad packages3D, STEP)++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [Texas Instruments datasheet](https://www.ti.com/cn/lit/gpn/cd74ac257) (None pp, sha256 `93b8394a9f142d39`, retrieved 2026-08-17, tier: lcsc)+- **Datasheet language:** Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.+- **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/cd74ac257m96-datasheet.pdf)

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