component
sn65hvd74dr
Public Unreviewedby Ray
Texas Instruments RS-485/RS-422 ICs, SOIC-8. Datasheet-verified pinout, KiCad symbol/footprint/3D.
3D Model
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README
markdownSN65HVD74DR
Texas Instruments · RS-485/RS-422 ICs · SOIC-8
SN65HVD74DR 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 | VCC | power_in | 3-V to 3.6-V supply (nominal 3.3 V). Recommended operating range 3.0-3.6 V; absolute max 5 V. Quiescent supply current is typically 750 µA (max 1100 µA) with both driver and receiver enabled. |
| 2 | R | output | Receiver data output (digital, CMOS). Drives high when the A-B differential input is above VIT+ (typ -20 mV) and low when below VIT- (typ -140 mV). VOH ≥ 2.4 V at IOH = -8 mA; VOL ≤ 0.4 V at IOL = 8 mA. |
| 3 | D | input | Driver data input (digital). 5-V tolerant logic input compatible with 3.3-V or 5-V controllers. VIH ≥ 2 V, VIL ≤ 0.8 V; input current ±3 µA max. A logic high drives Y high and Z low on the bus. |
| 4 | GND | power_in | Local device ground / reference potential for both logic and bus circuitry. |
| 5 | Y | output | Non-inverting driver bus output (complementary to Z). Full-duplex RS-485 transmit line. Driver differential output |
| 6 | Z | output | Inverting driver bus output (complementary to Y). Full-duplex RS-485 transmit line. Same electrical spec as Y ( |
| 7 | B | input | Inverting receiver bus input (complementary to A). Full-duplex RS-485 receive line. Wide common-mode range -7 V to +12 V; receiver threshold VIT+ ≤ -20 mV / VIT- ≥ -140 mV with 70-mV typical hysteresis. |
| 8 | A | input | Non-inverting receiver bus input (complementary to B). Full-duplex RS-485 receive line. Same electrical spec as B; supports up to 256 nodes on the bus at 1/8 unit-load. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SOIC-8 |
| Category | Comm/UART |
| Pins | 8 |
Ordering variants
SN65HVD74DRSN65HVD74DRDSN65HVD74DRDGKRSN65HVD74DRDGK
CAD (KiCad official)
- Symbol:
SN65HVD74DR - 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 (None pp, sha256
86f57997ef2a3eb6, 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).