TS555IDTTR

@@ -0,0 +1,49 @@+# TS555IDTTR++**STMicroelectronics** · Timers / Clock Oscillators · SO-8++TS555IDTTR from STMicroelectronics, in a SO-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 / negative supply reference (0 V). |+| 2 | Trigger | input | Trigger input. A falling edge below 1/3 Vcc sets the internal flip-flop and drives the Output high, starting a timing cycle. High input impedance CMOS input (~10^12 Ω). |+| 3 | Output | output | Push-pull CMOS timer output, compatible with TTL, CMOS and logic MOS loads. Rated for ±100 mA absolute max; recommended operating sink 10 mA / source 50 mA. |+| 4 | Reset | input | Active-low reset. Driving this pin low forces the Output low regardless of Trigger/Threshold state; must be tied high (typically to Vcc) when not used. |+| 5 | Control Voltage | input | Control voltage input, internally biased to 2/3 Vcc via the resistor divider. Allows external override of the internal threshold/trigger reference; typically decoupled to GND with a 10 nF capacitor when unused. |+| 6 | Threshold | input | Threshold comparator input. When the voltage on this pin rises above 2/3 Vcc (or the Control Voltage reference), the internal flip-flop is reset and the Output goes low. High-impedance CMOS input. |+| 7 | Discharge | output | Open-drain discharge pin, tied to the drain of an internal NMOS whose source is at GND. Used to discharge the external timing capacitor when the internal flip-flop is reset. |+| 8 | VCC | power_in | Positive supply, +2 V to +16 V operating range (absolute max +18 V). Typical Icc = 110 µA at Vcc = +5 V. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | STMicroelectronics |+| Package | SO-8 |+| Category | RTC |+| Pins | 8 |++## Ordering variants++Same part, different packaging or reel option.++- `TS555IDTTR`++## CAD (KiCad official)++- Symbol: `TS555IDTTR`+- Footprint: `Package_SO:TI_SO-PowerPAD-8`+- 3D model: SO-8 (KiCad packages3D, STEP)++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [STMicroelectronics datasheet](https://www.st.com/resource/en/datasheet/ts555idttr.pdf) (19 pp, sha256 `d77d351cf231d8c7`, 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/ts555idttr-datasheet.pdf)

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