MDZ12-2

@@ -0,0 +1,50 @@+# MDZ12-2++**Shanghai Mingda Microelectronics** · Audio Interface ICs · SOP-8++MDZ12-2 from Shanghai Mingda Microelectronics, in a SOP-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 | OUT | output | Drive signal output. Push-pull output for driving an external NPN transistor stage and buzzer. VoH >= 3.2 V at Io = 5 mA, VoL <= 0.4 V at Io = -5 mA (VDD = 3.6 V). |+| 2 | VDD | power_in | Positive supply. Operating range 1.5 V to 7 V (typical 3.6 V). A low-ESR ceramic decoupling capacitor between VDD and GND is required, and no series resistor should be placed between VDD and the supply. |+| 3 | F1 | input | Function-select input 1. Tie to VDD, to GND, or leave floating (high-Z) to choose the sound effect. F1 = VDD -> fire alarm; F1 = GND -> ambulance; F1 floating -> police car. Sink current typ. 40 uA when F1 = VDD. |+| 4 | NC | unconnected | No connection. Leave floating (悬空不接). |+| 5 | OSC0 | passive | Internal oscillator pin 1. Connect the external oscillation resistor R (typical 270 kOhm) between OSC0 and OSC1 to set the output tone frequency. Larger R lowers the output frequency. |+| 6 | OSC1 | passive | Internal oscillator pin 2. Connect the external oscillation resistor R (typical 270 kOhm) between OSC0 and OSC1 to set the output tone frequency. |+| 7 | F2 | input | Function-select input 2. Tie to VDD, to GND, or leave floating. F2 = VDD forces machine-gun sound regardless of F1; F2 = GND or floating enables the F1-selected sound. Sink current typ. 14 uA when F2 = VDD. |+| 8 | GND | power_in | Ground reference (Vss). Return for VDD and the OUT driver. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | Shanghai Mingda Microelectronics |+| Package | SOP-8 |+| Category | Interface |+| Pins | 8 |++## Ordering variants++Same part, different packaging or reel option.++- `MDZ12-2`++## CAD (KiCad official)++- Symbol: `MDZ12-2`+- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`+- 3D model: SOP-8 (KiCad packages3D, STEP)++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [Shanghai Mingda Microelectronics datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8589839290693165056) (7 pp, sha256 `effd3a8d7f3066cd`, retrieved 2026-08-17, 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:** `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/mdz12-2-datasheet.pdf)

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