component
DRDNB21D-7
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Diodes Incorporated AC-DC Controllers and Regulators, SOT-363. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.
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README.mdadded+45@@ -0,0 +1,45 @@+# DRDNB21D-7++**Diodes Incorporated** · AC-DC Controllers and Regulators · SOT-363++DRDNB21D-7 from Diodes Incorporated, in a SOT-363. 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 | IN1 | input | Input to Q1 pre-biased NPN transistor (base through R1=2.2kΩ). Drives channel 1. Vin range -5 to +12V; input current typ 3.6mA at VI=5V; VI(on) max 1.1V for VO=0.3V, IO=5mA. |+| 2 | GND | power_in | Common emitter of Q1 and Q2 (ground return for both channels). |+| 3 | IN2 | input | Input to Q2 pre-biased NPN transistor (base through R3=2.2kΩ). Drives channel 2. Vin range -5 to +12V; input current typ 3.6mA at VI=5V. |+| 4 | OUT2 | output | Open-collector output of Q2 with D2 anode connected internally. Connect to one side of relay coil 2 (return through VCC). VCEmax 50V; IO max 100mA; VO(on) max 0.3V at IO/IL=50mA/0.25mA. |+| 5 | VCC | power_in | Common cathode of D1 and D2 flyback diodes. Connect to relay supply (VCC) so diodes clamp inductive kickback from both relay coils. Diode VRM 100V, IO 250mA. |+| 6 | OUT1 | output | Open-collector output of Q1 with D1 anode connected internally. Connect to one side of relay coil 1 (return through VCC). VCEmax 50V; IO max 100mA; VO(on) max 0.3V. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | Diodes Incorporated |+| Package | SOT-363 |+| Category | PMIC |+| Pins | 6 |++## Ordering variants++- `DRDNB21D-7`++## CAD (KiCad official)++- Symbol: `DRDNB21D-7`+- Footprint: `Package_TO_SOT_SMD:SOT-363_SC-70-6`+- 3D model: SOT-363 (KiCad packages3D, STEP)++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [Diodes Incorporated datasheet](https://www.diodes.com/assets/Datasheets/DRDNB21D-7.pdf) (8 pp, sha256 `a9aafd34a8b09b0c`, retrieved 2026-08-17, tier: manufacturer)+- **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/drdnb21d-7-datasheet.pdf)
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