RH6618T

@@ -0,0 +1,48 @@+# RH6618T++**RONGHE Microelectronics** · LED Drivers · SOT-23-6++RH6618T from RONGHE Microelectronics, in a SOT-23-6. 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 | VDD | power_in | Positive supply. Operating range 2.4V to 5.5V (absolute max -0.3V to 5.5V). Bypass with 10uF + 0.1uF close to the pin. |+| 2 | GND | power_in | Negative supply / ground reference. |+| 3 | CMOD | bidirectional | Sampling capacitor pin. Connect Cm (typ. 15nF; recommended 2.2nF~47nF, up to 1uF) between CMOD and GND to set touch sensitivity. Use a low-tempco X7R/NPO capacitor and place away from heat sources. |+| 4 | POUT | output | Push-pull CMOS PWM output driving the external LED transistor. PWM frequency 25kHz (step-less) or 33kHz (3-level). Drive strength ~65mA IOL @ VDD=5V (VOL=0.3VDD), ~32mA IOH @ VDD=5V (VOH=0.7VDD). |+| 5 | MOD1 | input | Mode configuration bit 1 with internal pull-up (CMOS input, default high). Tie to VDD (1) for step-less dimming with brightness memory (gradual on/off), or to GND (0) for 3-level dimming (OFF/MIN/MID/MAX cycle). |+| 6 | TCH | bidirectional | Touch input. Connect to the capacitive touch electrode via a series resistor Rs (recommended >=5.1k) for improved noise immunity. First-touch response ~200ms; subsequent touches ~80ms in fast mode. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | RONGHE Microelectronics |+| Package | SOT-23-6 |+| Category | LED-drv |+| Pins | 6 |++## Ordering variants++- `RH6618T`+- `RH6618TRH6618A`+- `RH6618TRH6618B`++## CAD (KiCad official)++- Symbol: `RH6618T`+- 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:** [RONGHE Microelectronics datasheet](docs/rh6618t-datasheet.pdf) (11 pp, sha256 `b355c24c880eb4b8`, 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/rh6618t-datasheet.pdf)

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