SN65HVD78DR

@@ -0,0 +1,52 @@+# SN65HVD78DR++**Texas Instruments** · RS-485 / RS-422 ICs · SOIC-8++SN65HVD78DR from Texas Instruments, in a SOIC-8. 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 | R | output | Receive data output. CMOS-level output driven from the differential receiver comparing bus pins A and B. Output current range +/-8 mA. |+| 2 | RE | input | Active-low receiver enable. When low, the receiver output R is enabled; when high, R is high-impedance. Tie low with DE low for standby. |+| 3 | DE | input | Active-high driver enable. When high, the differential driver on A/B is enabled; when low, driver outputs are high-impedance. |+| 4 | D | input | Driver data input. CMOS-level logic input driving the differential bus outputs A and B when DE is asserted. 5-V tolerant. |+| 5 | GND | power_in | Local device ground / reference potential. |+| 6 | A | bidirectional | Non-inverting RS-485 differential bus I/O. Driver output or receiver input, complementary to B. Wide common-mode range (-7 V to 12 V) and robust bus ESD. |+| 7 | B | bidirectional | Inverting RS-485 differential bus I/O. Driver output or receiver input, complementary to A. Wide common-mode range (-7 V to 12 V) and robust bus ESD. |+| 8 | VCC | power_in | Supply voltage, 3.0 V to 3.6 V (3.3 V nominal). Bypass to GND with a local 100 nF ceramic capacitor. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | Texas Instruments |+| Package | SOIC-8 |+| Category | Interface |+| Pins | 8 |++## Ordering variants++- `SN65HVD78DR`+- `SN65HVD78DRD`+- `SN65HVD78DRDGK`+- `SN65HVD78DRDGKR`+- `SN65HVD78DRB`+- `SN65HVD78DRBR`++## CAD (KiCad official)++- Symbol: `SN65HVD78DR`+- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`+- 3D model: SOIC-8 (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/sn65hvd78.pdf) (47 pp, sha256 `b46f5803fa8302f9`, 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/sn65hvd78dr-datasheet.pdf)

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