MC1455BDR2G

@@ -0,0 +1,50 @@+# MC1455BDR2G++**onsemi** · Timers / Clock Oscillators · SOIC-8++MC1455BDR2G from onsemi, 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 | GND | power_in | Ground reference (0 V) for the device. |+| 2 | Trigger | input | Trigger input. A negative pulse below 1/3 VCC on this pin starts the timing cycle by setting the internal flip-flop and driving the Output high. |+| 3 | Output | output | Push-pull output. Swings between approximately 0 V and VCC and can source or sink up to 200 mA to drive loads directly. |+| 4 | Reset | input | Active-low reset. Pulling this pin below ~0.7 V forces the Output low and discharges the timing capacitor regardless of the trigger/threshold state. Tie to VCC when unused. |+| 5 | Control Voltage | input | Control voltage. Directly accesses the 2/3 VCC internal reference node, allowing external modulation of the timing threshold. Typically bypassed to ground with a 10 nF capacitor when not used. |+| 6 | Threshold | input | Threshold input. When the voltage on this pin rises above 2/3 VCC, the internal flip-flop is reset, driving the Output low and turning on the discharge transistor. |+| 7 | Discharge | output | Open-collector discharge output. Connects to the collector of an internal NPN transistor whose emitter is at GND; used to discharge the external timing capacitor during the reset phase of the timing cycle. |+| 8 | VCC | power_in | Positive supply voltage, 4.5 V to 16 V. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | onsemi |+| Package | SOIC-8 |+| Category | RTC |+| Pins | 8 |++## Ordering variants++- `MC1455BDR2G`+- `MC1455BDR2GMC1455BDG`+- `MC1455BDR2GMC1455BPG`+- `MC1455BDR2GMC1455BP1G`++## CAD (KiCad official)++- Symbol: `MC1455BDR2G`+- 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:** [onsemi datasheet](https://www.onsemi.com/pdf/datasheet/mc1455b-d.pdf) (11 pp, sha256 `26fe4119fe552966`, 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/mc1455bdr2g-datasheet.pdf)

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