MAX485ED

@@ -0,0 +1,48 @@+# MAX485ED++**HTC Korea TAEJIN Tech** · RS-485 / RS-422 ICs · SOP-8++MAX485ED from HTC Korea TAEJIN Tech, 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 that reflects the polarity of the differential A-B receiver input. High when A-B >= +0.2V, low when A-B <= -0.2V. High-impedance when RE is high; fail-safe guarantees a HIGH state when inputs are left unconnected. |+| 2 | RE | input | Receiver output enable, active LOW. A logic LOW enables the receiver output RO; a logic HIGH places RO in high-impedance (tri-state). Datasheet notes this pin as RE* (active-low). |+| 3 | DE | input | Driver output enable, active HIGH. A logic HIGH enables the differential driver outputs A and B; a logic LOW places the driver in high-impedance (tri-state). |+| 4 | DI | input | Driver input. Logic-level TTL/CMOS input to the differential driver. When DE is high, DI=1 drives A high and B low; DI=0 drives A low and B high. |+| 5 | GND | power_in | Ground reference for the device. |+| 6 | A | bidirectional | Non-inverting driver output and non-inverting receiver input. Part of the RS-485/RS-422 differential pair. Common-mode range -7V to +12V; can withstand -15V to +15V; receiver input impedance typ. 15kΩ (12kΩ min). |+| 7 | B | bidirectional | Inverting driver output and inverting receiver input. Part of the RS-485/RS-422 differential pair. Common-mode range -7V to +12V; can withstand -15V to +15V; receiver input impedance typ. 15kΩ (12kΩ min). |+| 8 | VCC | power_in | Positive supply input. Operating range 4.75V to 5.25V (nominal +5V). Absolute maximum 7V. No-load supply current typ. 900µA (DE=VCC) or 600µA (DE=0V). |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | HTC Korea TAEJIN Tech |+| Package | SOP-8 |+| Category | Interface |+| Pins | 8 |++## Ordering variants++- `MAX485EDED`+- `MAX485EDEN`++## CAD (KiCad official)++- Symbol: `MAX485ED`+- 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:** [HTC Korea TAEJIN Tech datasheet](docs/max485ed-datasheet.pdf) (10 pp, sha256 `774f69f5ba13229b`, 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/max485ed-datasheet.pdf)

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