LMC555CMMX

@@ -0,0 +1,51 @@+# LMC555CMMX++**Texas Instruments** · Timers / Clock Oscillators · VSSOP-8-0.65mm++LMC555CMMX from Texas Instruments, in a VSSOP-8-0.65mm. 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 reference (0 V) for the device. Connect to the negative supply rail. |+| 2 | TRIG | input | Trigger input. A negative pulse below 1/3 V+ on this pin sets the internal flip-flop, driving OUT high and starting the timing cycle. |+| 3 | OUT | output | Push-pull timer output. Swings between GND and V+ and can source or sink load current (typ. up to ~50 mA at V+ = 15 V). |+| 4 | RESET | input | Active-low reset. Pulling below ~0.7 V forces OUT low and discharges the timing capacitor regardless of TRIG. Tie to V+ when unused. |+| 5 | CONT | input | Control voltage. Provides access to the internal 2/3 V+ threshold reference; can be driven externally to modulate timing or pulse width. Typically bypassed to GND via a 10 nF capacitor when unused. |+| 6 | THRES | input | Threshold input. When the voltage on this pin exceeds 2/3 V+, the internal flip-flop is reset, driving OUT low and turning on the discharge transistor. |+| 7 | DISCH | output | Discharge. Open-drain output from an internal N-channel MOSFET; used to discharge the external timing capacitor when OUT is low. |+| 8 | V+ | power_in | Positive supply voltage, 1.5 V to 15 V. Bypass to GND with a 100 nF ceramic capacitor placed close to the pin. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | Texas Instruments |+| Package | VSSOP-8-0.65mm |+| Category | RTC |+| Pins | 8 |++## Ordering variants++- `LMC555CMMXCMM`+- `LMC555CMMXCMMX`+- `LMC555CMMXCM`+- `LMC555CMMXCMX`+- `LMC555CMMXCN`++## CAD (KiCad official)++- Symbol: `LMC555CMMX`+- Footprint: `Package_SO:VSSOP-8_2.3x2mm_P0.5mm`+- 3D model: VSSOP-8-0.65mm (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/lmc555cmmx.pdf) (32 pp, sha256 `23c01b550f0a28cb`, 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/lmc555cmmx-datasheet.pdf)

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