# ADM3074EARZ

**Analog Devices** · RS-485/RS-422 ICs · SOIC-8

ADM3074EARZ from Analog Devices, in a SOIC-8. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

## Pinout

| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | VCC | power_in | Power supply, 3.3 V ± 10%; bypass VCC to GND with a 0.1 µF capacitor. |
| 2 | RO | output | Receiver output; if (A − B) ≥ −50 mV RO is high, and if (A − B) ≤ −200 mV RO is low. |
| 3 | DI | input | Driver input; with the driver enabled a logic low on DI forces Y low and Z high, and a logic high forces Y high and Z low. |
| 4 | GND | power_in | Ground. |
| 5 | Y | output | Noninverting driver output. |
| 6 | Z | output | Inverting driver output. |
| 7 | B | input | Inverting receiver input B. |
| 8 | A | input | Noninverting receiver input A. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Analog Devices |
| Package | SOIC-8 |
| Category | Communication Interface Chip/UART/485/232 |
| Pins | 8 |

## Electrical characteristics

Limits as printed in the datasheet (page.json `metadata.characteristics` carries them as data).

| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| VCC to GND | VCC | -0.3 |  | 6 | V | TA = 25°C | 8 |
| Digital Input/Output Voltage (DI) |  | -0.3 |  | 6 | V | TA = 25°C | 8 |
| Driver Output (Y, Z)/Receiver Input (A, B) Voltage |  | -8 |  | 13 | V | TA = 25°C | 8 |
| Driver Output Current |  | -250 |  | 250 | mA | TA = 25°C | 8 |
| Operating Temperature Range (ADM307xEA) |  | -40 |  | 85 | °C |  | 8 |
| Storage Temperature Range |  | -65 |  | 150 | °C | TA = 25°C | 8 |
| θJA Thermal Impedance, 8-Lead SOIC_N | θJA |  | 158 |  | °C/W | 8-Lead SOIC_N | 8 |
| Lead Temperature, Soldering |  |  |  | 300 | °C | 10 sec | 8 |
| Lead Temperature, Vapor Phase |  |  |  | 215 | °C | 10 sec | 8 |
| Lead Temperature, Infrared |  |  |  | 220 | °C | 15 sec | 8 |
| Power Supply Voltage | VCC |  | 3.3 |  | V | 3.3 V ± 10% | 9 |

## CAD (KiCad official)

- Symbol: `ADM3074EARZ`
- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`
- 3D model: SOIC-8 (KiCad packages3D, STEP)
- 3D model files: `adm3074earz-etched.step` / `adm3074earz-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `adm3074earz.step` / `adm3074earz.glb` are the bare package body.

## Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

- **Datasheet:** [Analog Devices datasheet](https://www.analog.com/media/en/technical-documentation/data-sheets/ADM3070E_3071E_3072E_3073E_3074E_3075E_3076E_3077E_3078E.pdf) (20 pp, sha256 `f6e1b96c4dce3dff`, retrieved 2026-10-31, tier: manufacturer)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-5-5` (text), consensus `claude-sonnet-5-5` (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/adm3074earz-datasheet.pdf)