component
ADM2491EBRWZ-REEL7
Public Made by Adomby adom
Analog Devices Isolated RS-485/422 Transceivers, SOIC-16-300mil. Datasheet-verified pinout, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownADM2491EBRWZ-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.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);adm2491ebrwz-reel7.step/adm2491ebrwz-reel7.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Analog Devices datasheet (16 pp, sha256
d2765fb01d46c583, retrieved 2026-09-21, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.2, primaryclaude-haiku-4-5-20251001(text), consensusclaude-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).