HT6508ARZ

@@ -0,0 +1,51 @@+# HT6508ARZ++**HTCSEMI** · RS-485 / RS-422 ICs · SOP-8++HT6508ARZ 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 | RO | output | Receiver Output. Logic-level output of the differential receiver comparing A and B. High when A-B > +0.2V, low when A-B < -0.2V; fail-safe high when inputs are open. High-impedance when RE is high. VOH ≥ 2.5V at Io = -1.5mA; VOL ≤ 0.4V at Io = 2.5mA. |+| 2 | /RE | input | Receiver Output Enable, active low. Drive low to enable the receiver output RO; drive high to place RO in high-impedance state. TTL/CMOS compatible input (VIH ≥ 2.0V, VIL ≤ 0.8V). |+| 3 | DE | input | Driver Output Enable, active high. Drive high to enable driver outputs A and B; drive low to place driver outputs in high-impedance state. TTL/CMOS compatible input (VIH ≥ 2.0V, VIL ≤ 0.8V). |+| 4 | DI | input | Driver Input. Logic-level input to the differential driver. When DE=1: DI=0 forces A=0/B=1, DI=1 forces A=1/B=0. TTL/CMOS compatible (VIH ≥ 2.0V, VIL ≤ 0.8V). |+| 5 | GND | power_in | Ground reference. All voltages are referenced to this pin. |+| 6 | A | bidirectional | Non-inverting Driver Output / Non-inverting Receiver Input (RS-485/RS-422 bus line A). Withstands -7V to +12V common-mode; input resistance ≥12kΩ. Short-circuit current limited to 250mA over -7V ≤ Vo ≤ 12V; protected by thermal shutdown. |+| 7 | B | bidirectional | Inverting Driver Output / Inverting Receiver Input (RS-485/RS-422 bus line B). Withstands -7V to +12V common-mode; input resistance ≥12kΩ. Short-circuit current limited to 250mA over -7V ≤ Vo ≤ 12V; protected by thermal shutdown. |+| 8 | VCC | power_in | Supply voltage input. Single 3.3V ±0.3V supply. No-load quiescent supply current typically 120µA (RE=0V, DE=0V). Absolute maximum 7V. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | HTCSEMI |+| Package | SOP-8 |+| Category | Interface |+| Pins | 8 |++## Ordering variants++Same part, different packaging or reel option.++- `HT6508ARZ`+- `HT6508ARZANZ`+- `HT6508ARZARMZ`++## CAD (KiCad official)++- Symbol: `HT6508ARZ`+- 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](docs/ht6508arz-datasheet.pdf) (8 pp, sha256 `0ee06570b6c5b4de`, 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).++[Datasheet PDF](docs/ht6508arz-datasheet.pdf)

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