ST26C31BDR

@@ -0,0 +1,57 @@+# ST26C31BDR++**STMicroelectronics** · RS-485 / RS-422 ICs · SOIC-16++ST26C31BDR from STMicroelectronics, 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 | AIN | input | Channel A TTL/CMOS single-ended input. VIH >= 2 V, VIL <= 0.8 V. Drives the channel A differential output pair (AOUT / /AOUT). |+| 2 | AOUT | output | Channel A non-inverting differential (RS-422) output. 3-state; high impedance when enable inputs disable the driver. Drives balanced line loads (RL = 100 Ω typical). |+| 3 | /AOUT | output | Channel A inverting differential (RS-422) output (complement of AOUT). 3-state; high impedance when enable inputs disable the driver. |+| 4 | EN | input | Active-high enable input. Together with /EN (pin 12) enables all four channel outputs. When EN = L and /EN = H, all outputs are placed in high-impedance (Z) state. |+| 5 | /BOUT | output | Channel B inverting differential (RS-422) output (complement of BOUT). 3-state; high impedance when the driver is disabled. |+| 6 | BOUT | output | Channel B non-inverting differential (RS-422) output. 3-state; high impedance when the driver is disabled. |+| 7 | BIN | input | Channel B TTL/CMOS single-ended input. VIH >= 2 V, VIL <= 0.8 V. Drives the channel B differential output pair. |+| 8 | GND | power_in | Device ground reference (0 V). Common return for VCC and all I/O. |+| 9 | CIN | input | Channel C TTL/CMOS single-ended input. VIH >= 2 V, VIL <= 0.8 V. Drives the channel C differential output pair. |+| 10 | COUT | output | Channel C non-inverting differential (RS-422) output. 3-state; high impedance when the driver is disabled. |+| 11 | /COUT | output | Channel C inverting differential (RS-422) output (complement of COUT). 3-state; high impedance when the driver is disabled. |+| 12 | /EN | input | Active-low enable input. Together with EN (pin 4) enables all four channel outputs. When EN = L and /EN = H, all outputs are placed in high-impedance (Z) state. |+| 13 | /DOUT | output | Channel D inverting differential (RS-422) output (complement of DOUT). 3-state; high impedance when the driver is disabled. |+| 14 | DOUT | output | Channel D non-inverting differential (RS-422) output. 3-state; high impedance when the driver is disabled. |+| 15 | DIN | input | Channel D TTL/CMOS single-ended input. VIH >= 2 V, VIL <= 0.8 V. Drives the channel D differential output pair. |+| 16 | VCC | power_in | Positive supply voltage. Recommended 4.5 to 5.5 V (nominal 5 V); absolute max 7 V. Typical quiescent supply current 200 µA (max 500 µA) with static inputs. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | STMicroelectronics |+| Package | SOIC-16 |+| Category | Interface |+| Pins | 16 |++## Ordering variants++- `ST26C31BDR`+- `ST26C31BDRST26C31BN`+- `ST26C31BDRST26C31BTR`++## CAD (KiCad official)++- Symbol: `ST26C31BDR`+- 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:** [STMicroelectronics datasheet](https://www.st.com/resource/en/datasheet/st26c31bdr.pdf) (15 pp, sha256 `628b38556e56079d`, 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/st26c31bdr-datasheet.pdf)

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