BD41044FJ-CE2

@@ -0,0 +1,47 @@+# BD41044FJ-CE2++**ROHM** · CAN Controllers · SOIC-8++BD41044FJ-CE2 from ROHM, in a SOIC-8. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.++## Pinout++| Pin | Name | Type | Function |+|---|---|---|---|+| 1 | TXD | input | Transmission data input from the host microcontroller. Internal pull-up resistor to VCC. LOW drives the CAN bus dominant; HIGH allows the bus recessive. Logic thresholds: VIH >= 0.7*VCC, VIL <= 0.3*VCC. Protected by TXD dominant time-out (0.8 - 10 ms) in Normal mode. |+| 2 | GND | power_in | Ground reference (0 V) for the device. |+| 3 | VCC | power_in | Main supply voltage input. Recommended operating range 4.75 V to 5.25 V (typ 5.0 V). Absolute maximum -0.3 V to +7.0 V. Typical operating current: 10 uA (Standby), 5 mA (Normal Recessive), 45 mA (Normal Dominant, 60 ohm load). |+| 4 | RXD | output | Receive data output to the host microcontroller. Push-pull CMOS driver: IOH = -1 to -8 mA at VCC-0.4 V, IOL = 1 to 12 mA at 0.4 V. In Normal mode: HIGH = bus recessive, LOW = bus dominant. In Standby mode: HIGH when no wake-up detected, LOW when wake-up request detected. A diode to VCC prevents reverse current in Power-OFF mode. |+| 5 | SPLIT | output | Common-mode stabilization output for the CAN bus split-termination network. Outputs VCC/2 in Normal mode (0.45*VCC to 0.55*VCC at RLOAD=1 MOhm); Hi-Z in Standby and Power-OFF modes. Recommended external capacitor 1.0 - 100 nF (typ 4.7 nF). Absolute maximum -27 V to +40 V. |+| 6 | CANL | bidirectional | LOW-level CAN bus line. Differential transceiver I/O driven low during dominant state (typ 1.5 V, VDOM_DIFF 1.5 - 3.0 V into 60 ohm) and biased to VCC/2 during recessive. Absolute maximum -27 V to +40 V; common-mode range -12 V to +12 V; input impedance ~15 kOhm. |+| 7 | CANH | bidirectional | HIGH-level CAN bus line. Differential transceiver I/O driven high during dominant state (typ 3.5 V) and biased to VCC/2 during recessive. Absolute maximum -27 V to +40 V; common-mode range -12 V to +12 V; input impedance ~15 kOhm. |+| 8 | STB | input | Mode control input with internal pull-up resistor. HIGH selects Standby mode (low-power, wake-up detection only); LOW selects Normal mode (full CAN transceiver operation). Logic thresholds: VIH >= 0.7*VCC, VIL <= 0.3*VCC. Absolute maximum -0.3 V to +7.0 V. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | ROHM |+| Package | SOIC-8 |+| Category | Interface |+| Pins | 8 |++## Ordering variants++- `BD41044FJ-CE2CE2`++## CAD (KiCad official)++- Symbol: `BD41044FJ-CE2`+- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`+- 3D model: SOIC-8 (KiCad packages3D, STEP)++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [ROHM datasheet](docs/bd41044fj-ce2-datasheet.pdf) (25 pp, sha256 `9e11f04fab71ed08`, retrieved 2026-08-17, tier: lcsc)+- **Extractor:** `ds2sf` (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.+- **CAD:** KiCad official libraries (CC-BY-SA 4.0).++[Datasheet PDF](docs/bd41044fj-ce2-datasheet.pdf)

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