# HD568N

**Broadic** · RS-485 / RS-422 ICs · SOP-8

HD568N from Broadic, 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, valid when RE is low: after polarity detection, RO goes high when V(A)-V(B) > 100 mV and low when V(A)-V(B) < -100 mV. |
| 2 | RE | input | Receiver output enable, active low: RE low enables RO, RE high disables the receiver, and RE high with DE low puts the whole chip into shutdown. |
| 3 | DE | input | Driver output enable: DE high enables the driver, while DE low disables it and puts its outputs in high-impedance; DE low with RE high puts the chip in shutdown. |
| 4 | DI | input | Driver input: DI low forces the non-inverting output low and the inverting output high, and DI high forces the non-inverting output high and the inverting output low. |
| 5 | GND | power_in | Ground reference for all voltages on the device. |
| 6 | X1 | bidirectional | Bus interface pin that is assigned as the A or B port by the polarity detection (X1 and X2 are one A and one B); it powers up defaulting to the A port, with absolute maximum -8 V to +13 V and common-mode range -7 V to +12 V at VCC = 5 V. |
| 7 | X2 | bidirectional | Bus interface pin that is assigned as the B or A port by the polarity detection (opposite of X1); it powers up defaulting to the B port, with absolute maximum -8 V to +13 V and common-mode range -7 V to +12 V at VCC = 5 V. |
| 8 | VCC | power_in | Positive supply, 3.3 V to 5 V (absolute maximum +6 V), to be bypassed to GND with a 0.1 µF capacitor. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Broadic |
| 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 |  |  |  | 6 | V | All voltages referenced to GND | 2 |
| Input voltage DE, RE, DI |  | -0.3 |  | 6 | V | All voltages referenced to GND | 2 |
| Bus voltage X1, X2 |  | -8 |  | 13 | V | All voltages referenced to GND | 2 |
| Power dissipation, 8-pin SO |  |  |  | 471 | mW | 8-pin SO; derate -5.9 mW/°C above +70°C | 2 |
| Junction temperature |  |  |  | 150 | °C |  | 2 |
| Storage temperature range |  | -65 |  | 150 | °C |  | 2 |
| Soldering temperature |  |  |  | 300 | C | 10 s | 2 |
| Operating temperature range |  | -40 |  | 125 | °C |  | 2 |
| Supply voltage (3.3 to 5 V operation) |  | 3.3 |  | 5 | V | Product features: 3.3-5V supply voltage | 2 |
| Common-mode voltage X1, X2 |  | -7 |  | 12 | V | VCC=5V | 2 |
| Common-mode voltage X1, X2 |  | -7 |  | 9 | V | VCC=3.3V | 2 |
| Receiver differential input threshold voltage | VTH | -100 |  | 100 | mV | -7V≤VCM≤+12V | 3 |
| Output leakage current, receiver high-impedance | IOZR | -1 |  | 1 | µA | 0.4V≤VO≤2.4V | 4 |
| Input current (X1 and X2) shutdown/power-down | ISHDN |  | 1.8 | 10 | µA | DE GND RE Vcc | 4 |
| Driver output short-circuit current | IOD1 | -25 |  | 25 | mA | 0V≤VOUT≤VCC | 3 |
| Receiver output short-circuit current | IOSR | -95 |  | 95 | mA | 0V≤VRO≤VCC | 4 |
| Static supply current | ICC |  | 480 | 600 | µA | No load, RE DI GND or Vcc, DE=VCC | 4 |
| Static supply current | ICC |  | 420 | 600 | µA | No load, RE DI GND or Vcc, DE=GND | 4 |
| Electrostatic protection X1, X2 pins, contact discharge |  | -12 |  | 12 | kV | IEC 61000-4-2 | 4 |
| Electrostatic protection X1, X2 pins, human body model |  | -16 |  | 16 | kV | IEC 60749-26 | 4 |
| Electrostatic protection X1, X2 pins, fast transient burst |  | -4 |  | 4 | kV | IEC61000-4-4 | 4 |
| Electrostatic protection other pins, human body model |  | -4 |  | 4 | kV | HBM JEDEC JS-001 | 4 |
| Electrostatic protection other pins, charged device model |  | -1.5 |  | 1.5 | kV | CDM JESD22-C101 | 4 |
| Electrostatic protection other pins, machine model |  | -0.4 |  | 0.4 | kV | MM JESD22-A115 | 4 |
| Driver input to output delay (low to high) | tDPLH | 250 | 720 | 1000 | ns | Fig 3 and 5, RDIFF=54Ω, CL=54pF | 5 |
| Driver input to output delay (high to low) | tDPHL | 250 | 720 | 1000 | ns | Fig 3 and 5, RDIFF=54Ω, CL=54pF | 5 |
| Driver output skew | tDSKEW | -100 | -3 | 100 | ns | Fig 3 and 5, RDIFF=54Ω, CL1=CL2=100pF | 5 |
| Driver rise and fall time | tDR, tDF | 400 | 700 | 1200 | ns | Fig 3 and 5, RDIFF=54Ω, CL1=CL2=100pF | 5 |
| Maximum data rate | fMAX |  |  | 500 | kbps |  | 5 |
| Receiver input to output skew | tRSKD | -50 | 10 | 50 | ns | Fig 7 and 9; /VID/≥2.0V; VID rise/fall time <15 ns | 5 |
| Chip shutdown time | tSHDN | 50 | 200 | 600 | ns | Note 4 | 5 |
| Driver power dissipation derating |  |  | -5.9 |  | mW/°C | 8-pin SO; above +70°C | 2 |

## CAD (KiCad official)

- Symbol: `HD568N`
- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`
- 3D model: SOP-8 (KiCad packages3D, STEP)
- 3D model files: `hd568n-etched.step` / `hd568n-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `hd568n.step` / `hd568n.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Broadic datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8603099326428704768) (12 pp, sha256 `767e135ee1f4ee16`, retrieved 2026-10-17, tier: lcsc)
- **Datasheet language:** Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
- **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/hd568n-datasheet.pdf)