RN8209D

@@ -0,0 +1,66 @@+# RN8209D++**RENERGY** · Energy Metering · SSOP-24++RN8209D from RENERGY, in a SSOP-24. 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 | AVDD | power_in | Analog power supply for the analog portion of the chip. Requires 10µF + 0.1µF decoupling. Normal application range 3V-5.5V, typical 3.3V or 5V ±10%. |+| 2 | RST_N | input | Active-low reset pin. When held low the chip is in reset. Requires an external pull-up resistor. |+| 3 | NC | unconnected | Not connected. |+| 4 | V1P | input | Positive analog input of current Channel A. Fully differential input, max normal Vpp ±1000mV, max withstand ±6V. |+| 5 | V1N | input | Negative analog input of current Channel A. Fully differential input, max normal Vpp ±1000mV, max withstand ±6V. |+| 6 | V2P | input | Positive analog input of current Channel B. Fully differential input, max normal Vpp ±1000mV, max withstand ±6V. |+| 7 | V2N | input | Negative analog input of current Channel B. Fully differential input, max normal Vpp ±1000mV, max withstand ±6V. |+| 8 | V3P | input | Positive analog input of the voltage channel. Fully differential input, max normal Vpp ±1000mV, max withstand ±6V. |+| 9 | V3N | input | Negative analog input of the voltage channel. Fully differential input, max normal Vpp ±1000mV, max withstand ±6V. |+| 10 | REFV | bidirectional | 1.25V reference voltage input/output. Internal or external reference can be used; decouple with 1µF + 0.1µF capacitors to AGND. |+| 11 | AGND | power_in | Analog ground. |+| 12 | IS | input | Serial interface select. IS=0 → UART interface; IS=1 → SPI interface. Pin is internally floating; an external pull-up or pull-down is required. |+| 13 | SDO/TX | output | Multiplexed serial output: SPI SDO when IS=1 (high-impedance after reset) or UART TX data output when IS=0. |+| 14 | SDI/RX/RST_N | input | Multiplexed serial input: SPI SDI when IS=1 (3.3V/5V-compatible), or UART RX when IS=0. Also acts as an independent reset pin (equivalent to the dedicated RST_N pin) when held low. |+| 15 | SCLK/B0 | input | Multiplexed pin: SPI serial clock input when IS=1 (3.3V/5V-compatible); when IS=0 acts as B0, combined with B1 to select UART baud rate ({B1,B0}=00/01/10/11 → 2400/4800/9600/19200 bps). |+| 16 | SCSN/B1 | input | Multiplexed pin: SPI chip-select (active low) when IS=1 (3.3V/5V-compatible, requires external pull-up); when IS=0 acts as B1 baud-select bit for UART (see B0). |+| 17 | DGND | power_in | Digital ground. |+| 18 | DVDD | power_in | Digital power supply for the digital portion of the chip. Requires 10µF + 0.1µF decoupling. Normal application range 3V-5.5V, typical 3.3V or 5V ±10%. |+| 19 | OSCI | input | External crystal input / external clock input. Typical crystal frequency 3.579545MHz, external capacitor 15pF-22pF. Internal ~4MΩ feedback resistor is present (no external resistor needed); crystal ESR must be <50Ω. |+| 20 | OSCO | output | External crystal output. |+| 21 | NC | unconnected | Not connected. |+| 22 | IRQ_N/ZX | output | Interrupt or zero-crossing indicator output. After reset acts as interrupt request IRQ_N (Zxcfg=EMUCON bit7 = 0). When Zxcfg=1, outputs a zero-crossing indication (ZX) on the voltage channel. |+| 23 | PF | output | Active energy pulse output, low-level output by default. Pulse frequency indicates transient active power. Capable of 5mA output/sink. |+| 24 | QF | output | Reactive energy pulse output or user-defined pulse output, low-level output by default. Frequency indicates transient reactive or user-defined power. User-defined source can be Channel-B active power or vector sum of the two channels. Capable of 5mA output/sink. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | RENERGY |+| Package | SSOP-24 |+| Category | Data Acquisition |+| Pins | 24 |++## Ordering variants++Same part, different packaging or reel option.++- `RN8209D`+- `RN8209C`++## CAD (KiCad official)++- Symbol: `RN8209D`+- Footprint: `Package_SO:SSOP-24_5.3x8.2mm_P0.65mm`+- 3D model: SSOP-24 (KiCad packages3D, STEP)++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [RENERGY datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588882165929562112) (47 pp, sha256 `98eac50d43fd9f51`, retrieved 2026-08-17, tier: lcsc)+- **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/rn8209d-datasheet.pdf)

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