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rh6618a
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RONGHE Microelectronics Touch Sensors, SOP-8. Datasheet-verified pinout, KiCad symbol/footprint/3D.
3D Model
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markdownRH6618A
RONGHE Microelectronics · Touch Sensors · SOP-8
RH6618A from RONGHE Microelectronics, 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 | NC | unconnected | No internal connection on the RH6618A(B). Per section 6 note 3, Pin 1 may be left floating or tied to VDD or GND with no internal effect. |
| 2 | CMOD | bidirectional | Sampling capacitor pin for the capacitive touch front-end. Connect an NPO/X7R capacitor (recommended 2.2 nF-47 nF, up to ~1 uF for large metal touch pads) to GND. Cm value sets touch sensitivity; larger Cm = higher sensitivity. |
| 3 | VDD | power_in | Positive supply input. Operating range 2.4 V-5.5 V (typ 3.0 V). Bypass locally with the recommended 10 uF + 0.1 uF filter capacitors placed close to the IC. |
| 4 | GND | power_in | Device ground / negative supply return. Reference for VDD, POUT, TCH and CMOD. |
| 5 | TCH | bidirectional | Capacitive touch sense input. Connect to the touch electrode through a series resistor Rs (>5.1 kΩ recommended) to improve noise immunity. Detects short-press (on/off toggle) and long-press (dimming) events. |
| 6 | MOD1 | input | Mode configuration bit 1. CMOS input with internal pull-up (I-PH); default logic-high. Together with MOD2 selects one of four operating modes per Table 3 (stepless vs 3-level dimming, brightness memory, gradual vs instant on/off). Tie to VDD (=1) or GND (=0). |
| 7 | POUT | output | Push-pull CMOS PWM output driving the LED (typically through an NPN driver + current-limit resistor). 25 kHz in stepless dimming, 33 kHz in 3-level dimming. Drive: IOL ≈ 38 mA @ VDD=3 V / 65 mA @ 5 V (VOL=0.3·VDD); IOH ≈ 13 mA @ VDD=3 V / 32 mA @ 5 V (VOH=0.7·VDD). |
| 8 | MOD2 | input | Mode configuration bit 2. CMOS input with internal pull-up (I-PH); default logic-high. With MOD1 selects the RH6618A(B) operating mode per Table 3. Tie to VDD (=1) or GND (=0). |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | RONGHE Microelectronics |
| Package | SOP-8 |
| Category | Sensor |
| Pins | 8 |
Ordering variants
RH6618AARH6618ARH6618ABRH6618ARH6618BRH6618ATRH6618ARH6618T
CAD (KiCad official)
- Symbol:
RH6618A - 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: RONGHE Microelectronics datasheet (None pp, sha256
15835e2edd820cb1, 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).