CN706S

@@ -0,0 +1,49 @@+# CN706S++**ShangHai Consonance Elec** · Supervisor and Reset ICs · SOP-8++CN706S from ShangHai Consonance Elec, 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 | Manual reset input, active low. An internal pull-up to VCC lets the pin float high; pulling MR below the input-low threshold (approx 0.8 V at VCC=5V, 0.16*VCC at VCC<4.5V) asserts RESET for the reset timeout period (typ 200 ms). TTL/CMOS compatible; can be driven by a push-button to GND. |+| 2 | VCC | power_in | Positive supply input, operating range 1.15 V to 5.5 V. Monitored by the internal reset comparator against the CN706S 2.93 V threshold (typ). Bypass with a local ceramic capacitor to GND. |+| 3 | GND | power_in | Ground / 0 V reference for the supervisor and all logic outputs. |+| 4 | PFI | input | Power-fail comparator input. Compared against an internal 1.22 V reference; when PFI drops below 1.22 V the PFO output is driven low. Typically driven from a resistor divider off an unregulated rail to give an early brown-out warning. High input impedance (IPFI approx 0). |+| 5 | PFO | output | Power-fail output, active low. Push-pull CMOS output that asserts low whenever PFI is below the 1.22 V reference and releases high (VCC-1.2 V at ISOURCE=800 uA) otherwise. Independent of the reset generator, so it can be used as an early NMI/interrupt to the MCU. |+| 6 | WDI | input | Watchdog input. Must be toggled (rising or falling edge) within the watchdog timeout of typ 1.6 s (min 1.0 s, max 2.25 s); if no edge is detected the WDO output asserts low and an internal reset pulse is issued. Leaving WDI floating or three-stated (Hi-Z) disables the watchdog function. |+| 7 | RESET | output | Reset output, active low (open name '/RESET' in the datasheet). Asserts low whenever VCC is below the 2.93 V reset threshold, whenever MR is pulled low, or whenever the watchdog times out, and remains asserted for typ 200 ms after the fault clears. Valid down to VCC = 1 V; drives CMOS-level VOH = VCC-1.2 V at 800 uA source. |+| 8 | WDO | output | Watchdog output, active low. Asserts low if WDI has not been toggled within the 1.6 s watchdog window, or whenever VCC is below the reset threshold; released high once the watchdog is serviced and VCC is valid. Push-pull CMOS output (VOH2 = VCC-1.2 V at 800 uA, VOL2 <= 0.3 V at 3.2 mA sink). |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | ShangHai Consonance Elec |+| Package | SOP-8 |+| Category | PMIC |+| Pins | 8 |++## Ordering variants++- `CN706SS`+- `CN706SP`++## CAD (KiCad official)++- Symbol: `CN706S`+- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`+- 3D model: SOP-8 (KiCad packages3D, STEP)++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [ShangHai Consonance Elec datasheet](docs/cn706s-datasheet.pdf) (14 pp, sha256 `fe7cca14ea02af6e`, 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).++[Datasheet PDF](docs/cn706s-datasheet.pdf)

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