# TD522DCAN

**VISOM** · CAN Bus Modules · DIP-12

TD522DCAN from VISOM, in a DIP-12. 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 input (positive); for the TD522DCAN it must be 5 V nominal, within 4.75 V to 5.25 V, and the module has no reverse-polarity protection. |
| 2 | GND | power_in | Power supply input ground; reversing the supply polarity causes irreversible damage to the module. |
| 3 | RXD1 | output | Channel 1 receive data output to the host MCU/CAN controller at 5 V logic level (TD522DCAN), with output current up to 10 mA. |
| 4 | TXD1 | input | Channel 1 transmit data input from the host MCU/CAN controller at 5 V logic level, with VIH of 0.7VCC to VCC+0.5 V, VIL of 0 to 0.3VCC, and drive current of 2 mA. |
| 5 | RXD2 | output | Channel 2 receive data output to the host MCU/CAN controller at 5 V logic level (TD522DCAN), with output current up to 10 mA. |
| 6 | TXD2 | input | Channel 2 transmit data input from the host MCU/CAN controller at 5 V logic level, with VIH of 0.7VCC to VCC+0.5 V, VIL of 0 to 0.3VCC, and drive current of 2 mA. |
| 7 | CANH2 | bidirectional | Channel 2 CAN high bus line conforming to ISO 11898, with bus-pin maximum voltage rating of -27 V to +40 V and transient voltage of -100 V to +100 V. |
| 8 | CANL2 | bidirectional | Channel 2 CAN low bus line conforming to ISO 11898, with bus-pin maximum voltage rating of -27 V to +40 V and transient voltage of -100 V to +100 V. |
| 9 | CANG2 | power_out | Isolated power supply output ground for channel 2; it may be left floating when unused, per the datasheet's usage note. |
| 10 | CANH1 | bidirectional | Channel 1 CAN high bus line conforming to ISO 11898, with bus-pin maximum voltage rating of -27 V to +40 V and transient voltage of -100 V to +100 V. |
| 11 | CANL1 | bidirectional | Channel 1 CAN low bus line conforming to ISO 11898, with bus-pin maximum voltage rating of -27 V to +40 V and transient voltage of -100 V to +100 V. |
| 12 | CANG1 | power_out | Isolated power supply output ground for channel 1; it may be left floating when unused, per the datasheet's usage note. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | VISOM |
| Package | DIP-12 |
| Category | IoT/Communication Modules |
| Pins | 12 |

## Electrical characteristics

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

| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Input voltage range (TD522DCAN) |  | -0.7 | 5 | 7 | V |  | 2 |
| Input voltage VCC (TD522DCAN) | VCC | 4.75 | 5 | 5.25 | V |  | 2 |
| TXD logic low input voltage | VIL | 0 |  |  | V |  | 2 |
| RXD logic low output voltage | VOL |  | 0.2 | 0.4 | V | IRXD=4mA | 2 |
| CANH dominant output voltage | V(OD)CANH | 2.75 | 3.5 | 4.5 | V |  | 2 |
| CANL dominant output voltage | V(OD)CANL | 0.5 | 1.5 | 2.25 | V |  | 2 |
| CANH recessive output voltage | V(OR)CANH | 2 | 2.5 | 3 | V |  | 2 |
| CANL recessive output voltage | V(OR)CANL | 2 | 2.5 | 3 | V |  | 2 |
| Differential output dominant (logic 0) | Vdiff(d) | 1.5 | 2 | 3 | V |  | 2 |
| Differential output recessive (logic 1) | Vdiff(r) | -0.05 | 0 | 0.05 | V |  | 2 |
| Bus pin maximum withstand voltage | Vx | -27 |  | 40 | V |  | 2 |
| Bus transient voltage | Vtrt | -100 |  | 100 |  |  | 2 |
| Bus pin leakage current |  | -10 |  | 10 | μA | VCC=0V, VCANH/L=5V | 2 |
| Isolation voltage input-output |  | 2.5 |  |  | KVDC | 1 min test, leakage <5mA | 3 |
| Isolation voltage between two outputs |  | 1.5 |  |  | KVDC | 1 min test, leakage <5mA | 3 |
| Operating temperature range |  | -40 |  | 85 | ℃ | output at full load | 3 |
| Storage temperature |  | -55 |  | 125 | ℃ |  | 3 |
| Storage humidity |  |  |  | 95 | % | non-condensing | 3 |
| Case temperature rise during operation |  |  | 20 |  | ℃ |  | 3 |
| TXD propagation delay | tT |  | 80 |  | ns |  | 3 |
| RXD propagation delay | tR |  | 130 |  | ns |  | 3 |
| Loop delay | tPD(TXD-RXD) |  | 210 | 250 | ns |  | 3 |
| TXD dominant timeout time | Tto(dom)TXD | 2.5 |  | 16 | ms |  | 3 |
| Pin soldering temperature, hand soldering |  |  | 370 |  | ℃ | hand soldering @3~5 s | 2 |
| Pin soldering temperature, wave soldering |  |  | 265 |  | ℃ | wave soldering @5~10 s | 2 |

## CAD (KiCad official)

- Symbol: `TD522DCAN`
- Footprint: `Package_DIP:DIP-12_W7.62mm`
- 3D model: DIP-12 (KiCad packages3D, STEP)
- 3D model files: `td522dcan-etched.step` / `td522dcan-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `td522dcan.step` / `td522dcan.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [VISOM datasheet](docs/td522dcan-datasheet.pdf) (5 pp, sha256 `f91c3543dfc21849`, retrieved 2026-10-24, 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/td522dcan-datasheet.pdf)