component
SN65HVD21DR
Public Made by Adomby adom
Texas Instruments RS-485 / RS-422 ICs, SOIC-8. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownSN65HVD21DR
Texas Instruments · RS-485 / RS-422 ICs · SOIC-8
SN65HVD21DR from Texas Instruments, in a SOIC-8. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.
Pinout
| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | R | output | Receive data output, active high |
| 2 | RE | input | Receiver enable, active low; enables differential receiver when low |
| 3 | DE | input | Driver enable, active high; enables differential driver when high |
| 4 | D | input | Driver data input for digital data transmission onto RS-485 bus |
| 5 | GND | power_in | Local device ground reference potential |
| 6 | A | bidirectional | Differential bus A output/input, driver output or receiver input complementary to B, voltage range -20 V to 25 V |
| 7 | B | bidirectional | Differential bus B output/input, driver output or receiver input complementary to A, voltage range -20 V to 25 V |
| 8 | VCC | power_in | Supply voltage, 4.5-V to 5.5-V nominal |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SOIC-8 |
| Category | Interface |
| Pins | 8 |
CAD (KiCad official)
- Symbol:
SN65HVD21DR - Footprint:
Package_SO:SOIC-8_3.9x4.9mm_P1.27mm - 3D model: SOIC-8 (KiCad packages3D, STEP)
- 3D model files:
sn65hvd21dr-etched.step/sn65hvd21dr-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);sn65hvd21dr.step/sn65hvd21dr.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Texas Instruments datasheet (37 pp, sha256
7a91efb110506aa4, retrieved 2026-10-06, tier: manufacturer) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-haiku-4-5-20251001(text), consensusclaude-sonnet-5-5(agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish. - CAD: KiCad official libraries (CC-BY-SA 4.0).