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ADM2491EBRWZ-REEL7
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Analog Devices Isolated RS-485/422 Transceivers, SOIC-16-300mil. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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README.mdadded+52@@ -0,0 +1,52 @@+# ADM2491EBRWZ-REEL7++**Analog Devices** · Isolated RS-485/422 Transceivers · SOIC-16-300mil++ADM2491EBRWZ-REEL7 from Analog Devices, in a SOIC-16-300mil. 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 | VDD1 | power_in | Power supply (logic side), 3.0 to 5.5 V; requires 0.01-0.1 µF bypass capacitor to GND1. |+| 2 | GND1 | power_in | Ground reference (logic side). |+| 3 | RxD | tri_state | Receiver output with tri-state operation (disabled by RE high); logic low outputs 0.2-0.4 V, logic high outputs VDD1-0.3 to VDD1-0.2 V. |+| 4 | RE | input | Receiver enable (active low); receiver enabled when ≤0.25×VDD1, disabled when ≥0.7×VDD1. |+| 5 | DE | input | Driver enable (active high); driver enabled when ≥0.7×VDD1, disabled when ≤0.25×VDD1. |+| 6 | TxD | input | Transmit data logic input; thresholds 0.25×VDD1 (low) and 0.7×VDD1 (high), input current ±10 µA. |+| 7 | NC | unconnected | No connect pin, must remain floating. |+| 8 | GND1 | power_in | Ground reference (logic side). |+| 9 | GND2 | power_in | Ground reference (bus side). |+| 10 | NC | unconnected | No connect pin, must remain floating. |+| 11 | Y | output | Driver noninverting output (RS-485/RS-422), differential output ±2.0 to ±5.0 V into 54-100 Ω loads, max short-circuit current 250 mA. |+| 12 | Z | output | Driver inverting output (RS-485/RS-422), complementary to Y, differential output ±2.0 to ±5.0 V into 54-100 Ω loads, max short-circuit current 250 mA. |+| 13 | B | input | Receiver inverting input (RS-485/RS-422 bus); differential threshold voltage ±0.2 V, 12 kΩ input impedance. |+| 14 | A | input | Receiver noninverting input (RS-485/RS-422 bus); differential threshold voltage ±0.2 V, 12 kΩ input impedance. |+| 15 | GND2 | power_in | Ground reference (bus side). |+| 16 | VDD2 | power_in | Isolated power supply (bus side), 4.5 to 5.5 V; requires 0.01-0.1 µF bypass capacitor to GND2. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | Analog Devices |+| Package | SOIC-16-300mil |+| Category | Signal Isolation Devices |+| Pins | 16 |++## CAD (KiCad official)++- Symbol: `ADM2491EBRWZ-REEL7`+- Footprint: `Package_SO:SOIC-16_3.9x9.9mm_P1.27mm`+- 3D model: SOIC-16-300mil (KiCad packages3D, STEP)+- 3D model files: `adm2491ebrwz-reel7-etched.step` / `adm2491ebrwz-reel7-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `adm2491ebrwz-reel7.step` / `adm2491ebrwz-reel7.glb` are the bare package body.++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [Analog Devices datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588894329104707584) (16 pp, sha256 `d2765fb01d46c583`, retrieved 2026-09-21, tier: lcsc)+- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.2`, primary `claude-haiku-4-5-20251001` (text), consensus `claude-sonnet-4-6` (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.+- **CAD:** KiCad official libraries (CC-BY-SA 4.0).++[Datasheet PDF](docs/adm2491ebrwz-reel7-datasheet.pdf)
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