BL59S10

@@ -0,0 +1,58 @@+# BL59S10++**BL Shanghai Belling** · Pressure Sensors · SOP-16++BL59S10 from BL Shanghai Belling, in a SOP-16. 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 | C1 | passive | External capacitor connection for the voltage feedback amplifier. Together with C2 sets the amplifier gain used with the IR photodiode. |+| 2 | C2 | passive | External capacitor connection for the voltage feedback amplifier. Works with C1 to determine amplifier gain. |+| 3 | DETECT | input | Detecting input. Connects to a photodiode to supply a signal to the internal comparator for smoke detection. |+| 4 | STROBE | output | Strobe voltage output referenced to VDD. When output equals VDD-5V it enables other internal circuits. |+| 5 | VDD | power_in | Positive supply pin. Operating range 6V to 12V; average supply current ~12uA. |+| 6 | IRED | output | Pulse drive output signal for an external NPN transistor driving the IR photodiode/emitter. |+| 7 | I/O | bidirectional | Interconnect pin. Can tie together up to 40 detectors for auxiliary alarm, remote alarm, or auto-dialer functions. On-chip pull-down when used as input. |+| 8 | BRASS | output | Push-pull driver output to drive external buzzer for alarm and to indicate various operation states. Paired with SILVER for differential piezo drive. |+| 9 | SILVER | output | Push-pull driver output to drive external buzzer for alarm. Paired with BRASS to drive the piezoelectric buzzer in push-pull configuration. |+| 10 | FEEDBACK | input | Feedback terminal. Feeds the SILVER signal back into the push-pull output driver circuit input for resonant buzzer drive. |+| 11 | LED | output | Open-drain output that can drive an indicator LED directly to signal detector operation states. |+| 12 | OSC | input | Oscillator input. Connects to external R and C which set the internal oscillator frequency (~9.5-11.5ms period with recommended R2=10M, C3=1500pF). |+| 13 | R1 | passive | External R and C connecting terminal. Sets the IRED output pulse period (Tf = 0.6931 * R1 * C3, typical R1 = 100k). |+| 14 | VSS | power_in | Negative supply / ground reference pin (GND). |+| 15 | LOW-SUPPLY | input | Low-voltage detecting input. Connected to an external resistor divider between VDD and LED to set the low-supply alarm threshold (typical trip 6.5-7.8V at VIN=VDD/3). |+| 16 | TEST | input | Test terminal. Normally pulled low by an internal pull-down; driving it high causes the IC to enter a simulated-smoke condition. Floats back to VSS via the pull-down. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | BL Shanghai Belling |+| Package | SOP-16 |+| Category | Sensor |+| Pins | 16 |++## Ordering variants++Same part, different packaging or reel option.++- `BL59A10`+- `BL59S10`++## CAD (KiCad official)++- Symbol: `BL59S10`+- Footprint: `Package_SO:SOIC-16_3.9x9.9mm_P1.27mm`+- 3D model: SOP-16 (KiCad packages3D, STEP)++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [BL Shanghai Belling datasheet](docs/bl59s10-datasheet.pdf) (12 pp, sha256 `f4ede66631074c00`, 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/bl59s10-datasheet.pdf)

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