component
SR2LARU
Public Made by Adomby adom
STMicroelectronics Monitors & Reset Circuits, UDFN-6(1.3x1.6). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownSR2LARU
STMicroelectronics · Monitors & Reset Circuits · UDFN-6(1.3x1.6)
SR2LARU from STMicroelectronics, in a UDFN-6(1.3x1.6). Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.
Pinout
| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | VSS | power_in | Ground pin for the device; a 0.1 µF ceramic decoupling capacitor is recommended between VCC and VSS, as close to the device as possible. |
| 2 | SR1 | input | Secondary push-button Smart Reset input, active low, which must be held active together with SR0 for at least tSRC (6.0 s typ. for SR2LARU) to assert RST; VIH is 0.85 V to 5.5 V and VIL is up to 0.3 V. |
| 3 | RST | output | Active-low open-drain reset output with no internal pull-up on this variant, so an external pull-up is required; VOL is 0.3 V max when sinking 3.2 mA at VCC ≤ 4.5 V, and the output stays valid down to VCC = 1 V. |
| 4 | NC | unconnected | Not connected (not bonded internally); the datasheet says it should be connected to VSS. |
| 5 | SR0 | input | Primary push-button Smart Reset input, active low, which must be held active together with SR1 for at least tSRC to assert RST; driving it to VCC + 0.9 V to VCC + 1.4 V enters test mode. |
| 6 | VCC | power_in | Positive supply voltage, 1.65 V to 5.5 V (absolute maximum -0.3 V to 7 V), with a 0.1 µF ceramic decoupling capacitor recommended between VCC and VSS. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | STMicroelectronics |
| Package | UDFN-6(1.3x1.6) |
| Category | Power Supply Chip |
| Pins | 6 |
CAD (KiCad official)
- Symbol:
SR2LARU - Footprint:
Package_DFN_QFN:DFN-6_1.6x1.3mm_P0.4mm - 3D model: UDFN-6(1.3x1.6), generated from the KiCad footprint (body from the F.Fab outline, terminals on the pads, 0.55 mm nominal QFN height). Neither the vendor nor KiCad ships a 3D model for this package, so the dimensions are nominal, not the manufacturer's CAD (STEP)
- 3D model files:
sr2laru-etched.step/sr2laru-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);sr2laru.step/sr2laru.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: STMicroelectronics datasheet (22 pp, sha256
08d927275f1457ef, retrieved 2026-10-08, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-haiku-5-5(text), consensusclaude-sonnet-5-5(agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish. - CAD: KiCad official libraries (CC-BY-SA 4.0).