component
SN65HVD21MDREP
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
markdownSN65HVD21MDREP
Texas Instruments · RS-485 / RS-422 ICs · SOIC-8
SN65HVD21MDREP 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 | Receiver data output: it reflects the state of the A and B bus inputs when RE is low, goes high-impedance when RE is high, and drives a high level within 250 µs after a bus fault (failsafe), with VOH of at least 4 V at IO = −8 mA and VOL of at most 0.4 V at IO = 8 mA. |
| 2 | RE | input | Active-low receiver output enable: the receiver is enabled when RE is low and disabled (R high-impedance) when RE is high, with VIH of at least 2·VCC and VIL of at most 0.8 V. |
| 3 | DE | input | Driver output enable, active high: the A and B outputs are enabled when DE is high and set high-impedance when DE is low, with VIH of at least 2 V (2·VCC) and VIL of at most 0.8 V. |
| 4 | D | input | Driver data input: when DE is high, a high on D drives A high and B low while a low drives A low and B high, with VIH of at least 2·VCC, VIL of at most 0.8 V, and input current limited to ±100 µA. |
| 5 | GND | power_in | Network ground terminal, the reference for all voltages on the device except the differential bus I/O voltage (absolute maximum rating −0.5 V to 7 V on VCC relative to this terminal). |
| 6 | A | bidirectional | Non-inverting driver output and receiver input of the differential bus port, rated for −20 V to 25 V common-mode voltage in recommended operation and −27 V to 27 V absolute maximum with 16 kV HBM ESD protection. |
| 7 | B | bidirectional | Inverting driver output and receiver input of the differential bus port, rated for −20 V to 25 V common-mode voltage in recommended operation and −27 V to 27 V absolute maximum with 16 kV HBM ESD protection. |
| 8 | VCC | power_in | Single 5-V supply input, with recommended operating range of 4.5 V to 5.5 V (nominal 5 V) and an absolute maximum of 7 V. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SOIC-8 |
| Category | Interface |
| Pins | 8 |
CAD (KiCad official)
- Symbol:
SN65HVD21MDREP - Footprint:
Package_SO:SOIC-8_3.9x4.9mm_P1.27mm - 3D model: SOIC-8 (KiCad packages3D, STEP)
- 3D model files:
sn65hvd21mdrep-etched.step/sn65hvd21mdrep-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);sn65hvd21mdrep.step/sn65hvd21mdrep.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Texas Instruments datasheet (22 pp, sha256
d17ec4ff266f5c93, retrieved 2026-10-08, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-haiku-5-5(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).