# SP3485EN-HXY

**HXY MOSFET** · RS-485 / RS-422 ICs · SOP-8

SP3485EN-HXY from HXY MOSFET, 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 | R | output | Receiver output (RO), driven high when A-B is above +0.2V and low when below -0.2V, high impedance when the receiver is disabled (RE high). |
| 2 | RE | input | Active-low receiver enable input; logic low enables the receiver and high disables it, with VIH 2.0V min and VIL 0.8V max. |
| 3 | DE | input | Driver enable input; high enables the driver outputs A and B and low places them in high impedance, with VIH 2.0V min and VIL 0.8V max. |
| 4 | D | input | Driver input (DI); with the driver enabled, low forces A low and B high, and high forces A high and B low, within -0.3V to +7V. |
| 5 | GND | power_in | Ground reference for the device. |
| 6 | A | bidirectional | Non-inverting RS-485/RS-422 driver output and receiver input, rated -7V to +13V. |
| 7 | B | bidirectional | Inverting RS-485/RS-422 driver output and receiver input, rated -7V to +13V. |
| 8 | VCC | power_in | Supply voltage input, operating range 3.0 to 3.6V, absolute maximum 7V. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | HXY MOSFET |
| 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 |
|---|---|---|---|---|---|---|---|
| Recommended supply voltage (working voltage range) | VCC | 3 |  | 3.6 | V |  | 1 |
| Supply Voltage (VCC) | VCC |  |  | 7 | V |  | 1 |
| Control Input Voltage |  | -0.3 |  | 7 | V |  | 1 |
| Driver Input Voltage (DI) | DI | -0.3 |  | 7 | V |  | 1 |
| Driver Output Voltage (A, B) |  | -7 |  | 13 | V |  | 1 |
| Receiver Input Voltage (A, B) |  | -7 |  | 13 | V |  | 1 |
| Receiver Output Voltage (RO) | RO | -0.3 |  | 7 | V |  | 1 |
| Continuous Power Dissipation, 8-Pin SO |  |  |  | 400 | mW | TA = +70°C | 1 |
| Operating Temperature Range |  | 0 |  | 70 | °C |  | 1 |
| Storage Temperature Range |  | -65 |  | 150 | °C |  | 1 |
| Lead Temperature (soldering) |  |  |  | 300 | °C | soldering, 10sec | 1 |
| Differential Driver Output (no load) | VOD1 |  |  | 3.3 | V | no load | 2 |
| Differential Driver Output (with load) | VOD2 | 2 |  |  | V | R = 100Ω (RS-485) | 2 |
| Change in Magnitude of Driver Differential Output Voltage for Complementary Output States | ∆VOD |  |  | 0.2 | V | R = 54Ω | 2 |
| Driver Common-Mode Output Voltage | VOC |  |  | 3 | V | R = 54Ω | 2 |
| Change in Magnitude of Driver Common-Mode Output Voltage for Complementary Output States | ∆VOD |  |  | 0.2 | V | R = 54 | 2 |
| Input High Voltage | VIH | 2 |  |  | V | DE, DI, RE | 2 |
| Input Low Voltage | VIL |  |  | 0.8 | V | DE, DI, RE | 2 |
| Input Current | IIN1 | -2 |  | 2 | µA | DE, DI, RE | 2 |
| Input Current (A, B) | IIN2 |  |  | 125 | µA | DE = 0V; VIN = 12V | 2 |
| Input Current (A, B) | IIN2 | -100 |  |  | µA | VCC = 0V or 3.3V, VIN = -7V | 2 |
| Receiver Differential Threshold Voltage | VTH | -0.2 |  | 0.2 | V | -7V ≤ VCM ≤12V | 2 |
| Receiver Output Low Voltage | VOL |  |  | 0.4 | V | IO = 2.5mA, VID = -200mV | 2 |
| Three-State (high impedance) Output Current at Receiver | IOZR | -1 |  | 1 | µA | 0.4V ≤ VO ≤ 2.4V | 2 |
| No-Load Supply Current | ICC |  | 520 | 800 | µA | DE = VCC | 2 |
| No-Load Supply Current | ICC |  | 540 | 700 | µA | RE = 0V or VCC | 2 |
| No-Load Supply Current | ICC |  | 10 | 96 | µA | DE = 0V | 2 |
| Driver Short-Circuit Current | IOSD | -250 |  | 250 | mA |  | 2 |
| Driver Input to Output (low-to-high) | tPLH | 8 |  | 35 | ns | RDIFF = 27Ω | 3 |
| Driver Input to Output (high-to-low) | tPHL | 8 |  | 35 | ns | CL1 = CL2 = 100pF | 3 |
| Driver Output Skew to Output | tSKEW | 10 |  | 35 | ns | RDIFF = 60Ω, CL1 = CL2 = 100pF | 3 |
| Driver Enable to Output High | tZH | 20 |  | 90 | ns | CL= 110pF, S2 closed | 3 |
| Driver Enable to Output Low | tZL | 20 |  | 90 | ns | CL= 110pF, S1 closed | 3 |
| Driver Disable Time from Low | tLZ | 20 |  | 80 | ns | CL= 110pF, S1 closed | 3 |
| Driver Disable Time from High | tHZ | 20 |  | 80 | ns | CL= 110pF, S2 closed | 3 |
| Differential Receiver Skew /tPLH - tPHL/ | tSKD |  |  | 7 | ns | RDIFF = 54Ω | 3 |
| Receiver Enable to Output Low | tZL | 20 |  | 45 | ns | CRL = 15pF, S1 closed | 3 |
| Receiver Enable to Output High | tZH | 20 |  | 45 | ns | CRL = 15pF, S2 closed | 3 |
| Receiver Disable Time from Low | tLZ | 200 |  | 1400 | ns | CRL = 15pF, S1 closed | 3 |
| Receiver Disable Time from High | tHZ | 200 |  | 1400 | ns | CRL = 15pF, S2 closed | 3 |
| Receiver Input Hysteresis | ∆VTH |  | 30 |  | mV | VCM = 0V | 2 |

## CAD (KiCad official)

- Symbol: `SP3485EN-HXY`
- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`
- 3D model: SOP-8 (KiCad packages3D, STEP)
- 3D model files: `sp3485en-hxy-etched.step` / `sp3485en-hxy-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `sp3485en-hxy.step` / `sp3485en-hxy.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [HXY MOSFET datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8586210951687786496) (8 pp, sha256 `67ff0ce3386f5361`, retrieved 2026-10-18, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-5-5` (text+vision), consensus `claude-opus-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/sp3485en-hxy-datasheet.pdf)