TPS3808

@@ -0,0 +1,51 @@+# TPS3808++**Texas Instruments** · Voltage supervisor · SOT-23-6++Watches a supply rail and holds an open-drain RESET low until the rail is good and a delay has elapsed. The threshold is set by a resistor divider into SENSE (adjustable versions) or fixed by order code, and a single capacitor at CT sets the reset time-out from microseconds to seconds. A manual-reset input (MR) forces a reset on command. It draws under 3 uA, so it suits battery-powered supervision. A flexible single-channel reset generator.++## Pinout++| Pin | Name | Type | Function |+|---|---|---|---|+| 1 | RESET | output | Active-low open-drain RESET output. Asserted (low) when SENSE < VIT or MR is low. Requires a 10 kΩ to 1 MΩ pull-up; may be pulled above VDD. |+| 2 | GND | power_in | Ground return for the device. |+| 3 | MR | input | Active-low manual reset input. Driving MR low asserts RESET. Internally tied to VDD by a ~90 kΩ pull-up (may be left open). |+| 4 | CT | input | Reset-period programming pin. Open = fixed delay; 40 kΩ-200 kΩ to VDD selects a discrete delay; a ≥100 pF capacitor to GND sets a user-programmable 1.25 ms-10 s delay. |+| 5 | SENSE | input | Voltage-monitor input. When VSENSE drops below the threshold VIT, RESET is asserted. On the adjustable G01 variant SENSE is compared to an internal 0.405 V reference for external divider use. |+| 6 | VDD | power_in | Supply voltage, 1.7 V to 6.5 V. Bypass with a 0.1 µF ceramic capacitor placed close to the pin. |++## Key specifications++| Parameter | Value |+|---|---|+| Type | Voltage supervisor / reset IC |+| Threshold | Adjustable (SENSE) or fixed by order code |+| Reset delay | Programmable via CT capacitor |+| Output | Open-drain, active-low RESET |+| Manual reset | MR input |+| Quiescent current | < 3 uA |+| Supply | 0.8-6.5 V |+| Package | SOT-23-6 |++## Ordering variants++- `TPS3808G01DBVR (adjustable)`+- `TPS3808G09DBVR (fixed 0.9 V)`+- `TPS3808G33DBVR (fixed 3.3 V)`++## CAD (KiCad official)++- Symbol: `Power_Supervisor:TPS3808DBV (KiCad official)`+- Footprint: `Package_TO_SOT_SMD:SOT-23-6`+- 3D model: SOT-23-6 (KiCad packages3D, STEP)++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [Texas Instruments datasheet](https://www.ti.com/lit/ds/symlink/tps3808.pdf) (38 pp, sha256 `4b08ee1fbc7daba9`, 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/tps3808-datasheet.pdf)

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