# D3485

**Silicore(芯谷)** · RS-485 / RS-422 ICs · SOP-8

D3485 from Silicore(芯谷), in a SOP-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 | RO | output | Receiver output: while RE is low, RO goes high when A - B is at or above -50 mV and goes low when A - B is at or below -200 mV. |
| 2 | /RE | input | Receiver output enable: drive low to enable RO, which is high-impedance when RE is high; driving RE high with DE low enters low-power shutdown. |
| 3 | DE | input | Driver output enable: drive high to enable the driver outputs, which are high-impedance when DE is low; driving RE high with DE low enters low-power shutdown. |
| 4 | DI | input | Driver input: with DE high, a low on DI forces the non-inverting output low and the inverting output high. |
| 5 | GND | power_in | Ground: device ground, to which all voltages are referred unless otherwise noted. |
| 6 | A | bidirectional | Non-inverting receiver input and non-inverting driver output; receiver input resistance is at least 96 kΩ for -7 V ≤ VCM ≤ 12 V. |
| 7 | B | bidirectional | Inverting receiver input and inverting driver output; receiver input resistance is at least 96 kΩ for -7 V ≤ VCM ≤ 12 V. |
| 8 | VCC | power_in | Positive supply: operating voltage is +3 V to +5.5 V, with an absolute maximum supply voltage of 7 V. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Silicore(芯谷) |
| Package | SOP-8 |
| Category | Interface |
| 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 |
|---|---|---|---|---|---|---|---|
| Supply Voltage (VCC) | VCC |  |  | 7 | V |  | 3 |
| Operating Voltage |  | 3 |  | 5.5 | V |  | 3 |
| Control Input Voltage (/RE, DE) |  | -0.3 |  |  | V |  | 3 |
| Driver Input Voltage (DI) |  | -0.3 |  |  | V |  | 3 |
| Driver Output Voltage (A,B) |  | -13 |  | 13 | V |  | 3 |
| Receiver Input Voltage (A,B) |  | -13 |  | 13 | V |  | 3 |
| Receiver Output Voltage (RO) |  | -0.3 |  |  | V |  | 3 |
| Operating Temperature (TOPR) | TOPR | -40 |  | 125 | C |  | 3 |
| Storage Temperature (TSTG) | TSTG | -65 |  | 150 | C |  | 3 |
| Differential Driver Output | VOD2 | 1.5 |  |  | V | VCC=5V | 4 |
| Change in Magnitude of Differential Output Voltage | ∆VOD |  |  | 0.2 | V | VCC=5V | 4 |
| Driver Common-Mode Output Voltage | VOC | 1 |  | 3 | V | VCC=5V | 4 |
| Change in Magnitude of Common-Mode Voltage | ∆VOC |  |  | 0.2 | V | VCC=5V | 4 |
| Input High Voltage | VIH | 2 |  |  | V | VCC=5V; DE, DI, /RE | 4 |
| Input Low Voltage | VIL |  |  | 0.8 | V | VCC=5V; DE, DI, /RE | 4 |
| DI Input Hysteresis | VHYS |  |  | 100 | mV | VCC=5V | 4 |
| Driver Input Current (A and B) | IIN1 |  |  | 250 | uA | VCC=5.0V; VIN=12V, DE=0V | 4 |
| Driver Input Current (A and B) | IIN1 | -150 |  |  | uA | VCC=5V; VIN=-7V | 4 |
| Driver Short-Circuit Output Current | IOSD | -100 |  | 100 | mA | VCC=5V; A and B Short-Circuit | 4 |
| Receiver Differential Threshold Voltage | VTH | -200 |  | -50 | mV | VCC=5V; -7V≤VCM≤12V | 4 |
| Receiver Input Hysteresis | △VTH |  |  | 40 | mV | VCC=5V | 4 |
| Receiver Output Low Voltage | VOL |  |  | 0.4 | V | VCC=5V; IO=8mA | 4 |
| Three-State Output Current at Receiver | IOZR | -1 |  | 1 | µA | VCC=5V; Vo=1V | 4 |
| Receiver Input Resistance | RIN | 96 |  |  | KΩ | VCC=5V; -7V≤VCM≤12V | 4 |
| Receiver Output Short-Circuit Current | IOSR | -7 |  | 100 | mA | VCC=5V; 0V≤VRO≤VCC | 4 |
| Supply Current (DE=VCC) | ICC |  | 700 | 1200 | µA | VCC=5V; DE=VCC, No Load, /RE=DI=VCC/GND | 4 |
| Supply Current (DE=GND) | ICC |  | 600 | 1200 | µA | VCC=5V; DE=GND | 4 |
| Supply Current in Shutdown Mode | ISHDN |  |  | 3 | µA | VCC=5V; DE=GND, /RE=VCC, DI=VCC/GND | 4 |
| Differential Driver Output | VOD2 | 0.9 |  |  | V | VCC=3V | 5 |
| Change in Magnitude of Differential Output Voltage | ∆VOD |  |  | 0.2 | V | VCC=3V | 5 |
| Driver Common-Mode Output Voltage | VOC | 1 |  | 3 | V | VCC=3V | 5 |
| Change in Magnitude of Common-Mode Voltage | ∆VOC |  |  | 0.2 | V | VCC=3V | 5 |
| Input High Voltage | VIH | 1.5 |  |  | V | VCC=3V; DE, DI, /RE | 5 |
| Input Low Voltage | VIL |  |  | 0.6 | V | VCC=3V; DE, DI, /RE | 5 |
| DI Input Hysteresis | VHYS |  |  | 100 | mV | VCC=3V | 5 |
| Driver Input Current (A and B) | IIN1 |  |  | 150 | uA | VCC=3V; VIN=12V, DE=0V | 5 |
| Driver Input Current (A and B) | IIN1 | -150 |  |  | uA | VCC=3V; VIN=-7V | 5 |
| Driver Short-Circuit Output Current | IOSD | -100 |  | 100 | mA | VCC=3V; A and B Short-Circuit | 5 |
| Receiver Differential Threshold Voltage | VTH | -200 |  | 200 | mV | VCC=3V; -7V≤VCM≤12V | 5 |
| Receiver Input Hysteresis | △VTH |  |  | 40 | mV | VCC=3V | 5 |
| Receiver Output Low Voltage | VOL |  |  | 0.6 | V | VCC=3V; IO=8mA | 5 |
| Three-State Output Current at Receiver | IOZR | -1 |  | 1 | µA | VCC=3V; Vo=1V | 5 |
| Receiver Input Resistance | RIN | 96 |  |  | KΩ | VCC=3V; -7V≤VCM≤12V | 5 |
| Receiver Output Short-Circuit Current | IOSR | -7 |  | 100 | mA | VCC=3V; 0V≤VRO≤VCC | 5 |
| Supply Current (DE=VCC) | ICC |  |  | 1000 | µA | VCC=3V; DE=VCC, No Load, /RE=DI=VCC/GND | 5 |
| Supply Current (DE=GND) | ICC |  |  | 1000 | µA | VCC=3V; DE=GND | 5 |
| Supply Current in Shutdown Mode | ISHDN |  |  | 3 | µA | VCC=3V; DE=GND, /RE=VCC, DI=VCC/GND | 5 |
| Driver Input to Output Propagation Delay | tPLH, tPHL |  | 30 | 60 | ns | VCC=5V | 6 |
| Driver Output Skew | tSKEW |  |  | 20 | ns | VCC=5V | 6 |
| Driver Enable Time (Receiver enabled) | tLZ, tHZ |  |  | 70 | ns | VCC=5V; Figure 4 and 6, CL=100pF | 6 |
| Driver Enable Time (Receiver disabled) | tLZ(SHDN), tHZ(SHDN) |  | 1400 | 3000 | ns | VCC=5V; Figure 4 and 6, CL=100pF | 6 |
| Driver Disable Time | tLZ, tZL |  |  | 70 | ns | VCC=5V; Figure 4 and 6, CL=100pF | 6 |
| Receiver Propagation Delay Time | tPLH, tPHL |  | 90 | 250 | ns | VCC=5V | 6 |
| Receiver Enable Time (Driver enabled) | tZL, tZH |  | 30 | 70 | ns | VCC=5V; Figure 2 and 8, CRL=15pF | 6 |
| Receiver Enable Time (Driver disabled) | tZL(SHDN), tZH(SHDN) |  | 1400 | 3000 | ns | VCC=5V; Figure 2 and 8, CRL=15pF | 6 |
| Receiver Disable Time | tLZ, tHZ |  | 30 | 70 | ns | VCC=5V; Figure 2 and 8, CRL=15pF | 6 |
| Time to Shutdown | tSHDN |  | 200 | 600 | ns | VCC=5V | 6 |
| Driver Input to Output Propagation Delay | tPLH, tPHL |  | 30 | 60 | ns | VCC=3V | 7 |
| Driver Output Skew | tSKEW |  |  | 20 | ns | VCC=3V | 7 |
| Driver Enable Time (Receiver enabled) | tLZ, tHZ |  |  | 70 | ns | VCC=3V; Figure 4 and 6, CL=100pF | 7 |

## CAD (KiCad official)

- Symbol: `D3485`
- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`
- 3D model: SOP-8 (KiCad packages3D, STEP)
- 3D model files: `d3485-etched.step` / `d3485-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `d3485.step` / `d3485.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Silicore(芯谷) datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8590920739476893696) (10 pp, sha256 `fbd9355a1d6f3616`, retrieved 2026-10-17, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-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/d3485-datasheet.pdf)