component
max813lcsa
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MSKSEMI Supervisor and Reset ICs, SOP-8. Datasheet-verified pinout, KiCad symbol/footprint/3D.
3D Model
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README
markdownMAX813LCSA
MSKSEMI · Supervisor and Reset ICs · SOP-8
MAX813LCSA from MSKSEMI, in a SOP-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 | !MR | input | Active-low manual reset input. Internally pulled up to VCC through a 10-40 kΩ resistor (typ. 20 kΩ). Driving this pin low forces RESET active; input thresholds are 0.7·VCC / 0.6 V (VCC<4.5 V) or 2.0 V / 0.8 V (VCC≥4.5 V). Minimum low pulse width 150 ns (VCC>4.5 V) or 500 ns at lower supplies. |
| 2 | VCC | power_in | Positive supply input. Operating range 5.0 V-5.5 V for the 813L reset threshold (VRT = 4.65 V typ.); device functions down to 1.1 V for reset output validity. Supply current ICC ≈ 75 µA typical, 140 µA maximum. |
| 3 | GND | power_in | Device ground reference (0 V). Return for VCC and reference for all input/output thresholds. |
| 4 | PFI | input | Power-fail comparator input, non-inverting side against an internal 1.25 V reference (threshold 1.20-1.30 V, typ. 1.25 V, on falling edge). Very high impedance input (±25 nA leakage). Tie to GND or VCC if unused; drive from an external resistor divider to monitor an arbitrary rail. |
| 5 | !PFO | output | Active-low power-fail comparator output. Goes low when PFI drops below the 1.25 V reference. Push-pull drive: VOH ≥ VCC−1.5 V at 800 µA source (VCC≥4.5 V), VOL ≤ 0.4 V at 3.2 mA sink. |
| 6 | WDI | input | Watchdog input. Must be toggled (high or low transition) at least every tWD ≈ 1.6 s typical (1.0-2.25 s) or !WDO will assert. Minimum pulse width tWP = 50 ns (VCC>4.5 V) or 100 ns at lower supplies. Leave floating (three-state / high-Z) to disable the watchdog timer. |
| 7 | RESET | output | Active-high reset output. Asserts high whenever VCC falls below VRT (typ. 4.65 V) and remains high for tRS ≈ 200 ms after VCC recovers or after a manual reset. Push-pull drive: VOH ≥ VCC−1.5 V at 800 µA source (VCC≥4.5 V), VOL ≤ 0.4 V at 3.2 mA sink; guaranteed VOH ≥ 0.9 V even at VCC=1.2 V (ISOURCE=4 µA). |
| 8 | !WDO | output | Active-low watchdog timeout output. Pulls low if WDI is not toggled within tWD (~1.6 s). Push-pull drive: VOH ≥ VCC−1.5 V at 800 µA source (VCC≥4.5 V), VOL ≤ 0.4 V at 1.2 mA sink. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | MSKSEMI |
| Package | SOP-8 |
| Category | PMIC |
| Pins | 8 |
Ordering variants
MAX813LCSAMAX813LCSA813LESAMAX813LCSA/TMAX813LCSA813LESA/TMAX813LCSA813LCPAMAX813LCSA813LEPAMAX813LCSA813LCUAMAX813LCSA813LCUA/TMAX813LCSA813LC/D
CAD (KiCad official)
- Symbol:
MAX813LCSA - Footprint:
Package_SO:SOIC-8_3.9x4.9mm_P1.27mm - 3D model: SOP-8 (KiCad packages3D, STEP)
- 3D model files:
max813lcsa-etched.step/max813lcsa-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);max813lcsa.step/max813lcsa.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: MSKSEMI datasheet (None pp, sha256
a5d1d68be0f7c959, retrieved 2026-08-17, tier: lcsc) - Datasheet language: Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
- 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).
Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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