component
THVD1550DR
Public Made by Adomby adom
Texas Instruments RS-485 / RS-422 ICs, SOIC-8. Pinout extracted from 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
markdownTHVD1550DR
Texas Instruments · RS-485 / RS-422 ICs · SOIC-8
THVD1550DR 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. Digital output that reflects the differential state of the A/B bus inputs when the receiver is enabled. |
| 2 | /RE | input | Receiver enable, active low. Has a 2 MΩ internal pull-up so the receiver defaults to disabled when the pin is left floating. |
| 3 | DE | input | Driver enable, active high. Has a 2 MΩ internal pull-down so the driver defaults to disabled (Hi-Z bus) when the pin is left floating. |
| 4 | D | input | Driver data input. Digital input whose logic level is transmitted differentially onto the A/B bus when the driver is enabled. |
| 5 | GND | power_in | Device ground reference (0 V). |
| 6 | A | bidirectional | RS-485 bus I/O port A (non-inverting, complementary to B). ±18-kV IEC 61000-4-2 ESD contact and ±25-kV air-gap protected differential bus line. |
| 7 | B | bidirectional | RS-485 bus I/O port B (inverting, complementary to A). ±18-kV IEC 61000-4-2 ESD contact and ±25-kV air-gap protected differential bus line. |
| 8 | VCC | power_in | 5-V supply. Recommended operating range 4.5 V to 5.5 V. Bypass with a 100 nF ceramic capacitor to GND close to the pin. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SOIC-8 |
| Category | Interface |
| Pins | 8 |
Ordering variants
Same part, different packaging or reel option.
THVD1550DRTHVD1550DRDTHVD1550DRDGKRTHVD1550DRDGK
CAD (KiCad official)
- Symbol:
THVD1550DR - Footprint:
Package_SO:SOIC-8_3.9x4.9mm_P1.27mm - 3D model: SOIC-8 (KiCad packages3D, STEP)
- 3D model files:
thvd1550dr-etched.step/thvd1550dr-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);thvd1550dr.step/thvd1550dr.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Texas Instruments datasheet (43 pp, sha256
6548e9b62323185e, 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).