cbm3485as8

@@ -0,0 +1,48 @@+# CBM3485AS8++**Corebai Microelectronics** · RS-485 / RS-422 ICs · SOIC-8++CBM3485AS8 from Corebai Microelectronics, 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 | RO | output | Receiver output. Drives logic-high (VOH ≥ 2.5V at IO = -1.5mA) when A-B > +0.2V, logic-low (VOL ≤ 0.4V at IO = 2.5mA) when A-B < -0.2V. High-impedance when RE is high; guaranteed logic-high when the differential input is open (fail-safe). |+| 2 | RE | input | Receiver output enable, active-low. When low the receiver output RO is enabled; when high RO is placed into a high-impedance (three-state) condition. VIH ≥ 2.0V, VIL ≤ 0.8V; input current ±2µA. |+| 3 | DE | input | Driver output enable, active-high. When high the differential driver outputs A and B are enabled; when low the outputs are placed into a high-impedance state. VIH ≥ 2.0V, VIL ≤ 0.8V; input current ±2µA. |+| 4 | DI | input | Driver input. TTL/CMOS-compatible logic input transmitted onto the differential bus (A, B) when DE is asserted. VIH ≥ 2.0V, VIL ≤ 0.8V; input current ±2µA. DI = 1 drives A high / B low; DI = 0 drives A low / B high. |+| 5 | GND | power_in | Ground / device 0V reference. All voltages are referenced to this pin. |+| 6 | A | bidirectional | Non-inverting differential bus I/O. Driver non-inverting output when DE is high; receiver non-inverting input when RE is low. Common-mode range -7V to +12V; input resistance 12kΩ min; receiver differential threshold ±0.2V. ±15kV IEC61000-4-2 air / ±8kV contact ESD on bus pins. |+| 7 | B | bidirectional | Inverting differential bus I/O. Driver inverting output when DE is high; receiver inverting input when RE is low. Common-mode range -7V to +12V; input resistance 12kΩ min; receiver differential threshold ±0.2V. ±15kV IEC61000-4-2 air / ±8kV contact ESD on bus pins. |+| 8 | VCC | power_in | Positive supply, single 3.3V nominal (3.0V to 3.6V operating). No-load supply current 300µA typ (500µA typ with DE = VCC). Absolute maximum 7V. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | Corebai Microelectronics |+| Package | SOIC-8 |+| Category | Interface |+| Pins | 8 |++## Ordering variants++- `CBM3485AS8`+- `CBM3485AS8ACS`++## CAD (KiCad official)++- Symbol: `CBM3485AS8`+- 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:** [Corebai Microelectronics datasheet](docs/cbm3485as8-datasheet.pdf) (None pp, sha256 `6707251207fe6199`, 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/cbm3485as8-datasheet.pdf)

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