component
ht3490ebrz
Public Unreviewedby Ray
HTCSEMI RS-485/RS-422 ICs, SOP-8. Datasheet-verified pinout, KiCad symbol/footprint/3D.
3D Model
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README
markdownHT3490EBRZ
HTCSEMI · RS-485/RS-422 ICs · SOP-8
HT3490EBRZ from HTCSEMI, in a SOP-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 | Positive supply voltage input. Operating range +3.00V to +3.60V (nominal +3.3V ±5%). Typical supply current 1000 µA (2000 µA max). |
| 2 | R | output | Receiver output. CMOS logic-level output driven from the differential A/B receiver. VOH = VCC-0.4V at IO = -1.5mA; VOL = 0.4V at IO = +2.5mA. Fail-safe HIGH when inputs are left unconnected. |
| 3 | D | input | Driver input. CMOS logic-level input that controls the differential Y/Z driver outputs. VIH = 2.0V min, VIL = 0.8V max, input current ±10 µA max. |
| 4 | GND | power_in | Ground connection. Return for supply and signal reference. |
| 5 | Y | output | Non-inverting driver output (RS-485/RS-422). Differential output pair with Z. Delivers ≥1.5V differential into 27Ω (RS-485) and ≥2V into 50Ω (RS-422). Short-circuit current limited to ±250 mA over -7V to +12V. |
| 6 | Z | output | Inverting driver output (RS-485/RS-422). Differential complement of Y. Same drive/short-circuit specifications as Y. |
| 7 | B | input | Inverting receiver input (RS-485/RS-422). Differential input paired with A. Input resistance 12kΩ min (15kΩ typ). Common-mode range -7V to +12V, differential threshold ±200mV with 25mV hysteresis. |
| 8 | A | input | Non-inverting receiver input (RS-485/RS-422). Differential input paired with B. Input resistance 12kΩ min (15kΩ typ). Common-mode range -7V to +12V, differential threshold ±200mV with 25mV hysteresis. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | HTCSEMI |
| Package | SOP-8 |
| Category | Comm/UART |
| Pins | 8 |
Ordering variants
HT3490EBRZHT3490EARZHT3490EBRZHT3490EBRZHT3491EARZHT3490EBRZHT3491EBRZ
CAD (KiCad official)
- Symbol:
HT3490EBRZ - Footprint:
Package_SO:SOIC-8_3.9x4.9mm_P1.27mm - 3D model: SOP-8 (KiCad packages3D, STEP)
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: HTCSEMI datasheet (None pp, sha256
d8506750017e5efe, retrieved 2026-08-17, tier: lcsc) - 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).