JSM485ESA

@@ -0,0 +1,48 @@+# JSM485ESA++**JSMSEMI** · RS-485/RS-422 ICs · SOP-8++JSM485ESA from JSMSEMI, 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 | tri_state | Receiver output. When /RE is low, RO drives high if (A-B) ≥ 200 mV and low if (A-B) ≤ -200 mV. High-impedance when /RE is high. |+| 2 | /RE | input | Receiver enable, active-low. Low enables the receiver output RO; high disables (tri-states) the receiver. |+| 3 | DE | input | Driver enable, active-high. High enables the differential A/B driver; low tri-states the driver outputs. |+| 4 | DI | input | Driver (transmitter) data input. With DE high: DI low drives A low and B high; DI high drives A high and B low. |+| 5 | GND | power_in | Ground reference for the device. |+| 6 | A | bidirectional | Non-inverting RS-485/RS-422 bus pin. Receiver non-inverting input and driver non-inverting output. -7 V to +12 V common-mode range, 32 kΩ typical input impedance. |+| 7 | B | bidirectional | Inverting RS-485/RS-422 bus pin. Receiver inverting input and driver inverting output. -7 V to +12 V common-mode range, 32 kΩ typical input impedance. |+| 8 | VCC | power_in | Supply pin, typically 5 V. Recommended operating range 3.0 V to 5.5 V; absolute maximum 8.0 V. Typical supply current 155-160 µA at no load. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | JSMSEMI |+| Package | SOP-8 |+| Category | Comm/UART |+| Pins | 8 |++## Ordering variants++- `JSM485ESA`++## CAD (KiCad official)++- Symbol: `JSM485ESA`+- 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:** [JSMSEMI datasheet](docs/jsm485esa-datasheet.pdf) (11 pp, sha256 `9c1f59f8c7e5b077`, retrieved 2026-08-17, tier: lcsc)+- **Datasheet language:** Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.+- **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/jsm485esa-datasheet.pdf)

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