component
SN65C3222DWR
Public Made by Adomby adom
Texas Instruments RS232 ICs, SOIC-20-300mil. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownSN65C3222DWR
Texas Instruments · RS232 ICs · SOIC-20-300mil
SN65C3222DWR from Texas Instruments, in a SOIC-20-300mil. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.
Pinout
| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | EN | input | Receiver enable input; setting EN high places all receiver outputs (ROUT) in the high-impedance state, and it accepts up to 5.5 V on the driver/control input range. |
| 2 | C1+ | passive | Positive terminal of charge-pump flying capacitor C1, which is 0.047 µF at VCC = 5 V or 0.1 µF at VCC = 3.3 V per the recommended test conditions. |
| 3 | V+ | power_out | Positive charge-pump output supply for the drivers, which is lowered toward VCC when the device is powered down. |
| 4 | C1− | passive | Negative terminal of charge-pump flying capacitor C1 connected to the internal charge pump. |
| 5 | C2+ | passive | Positive terminal of charge-pump flying capacitor C2, specified at 0.33 µF at VCC = 5 V or 0.1 µF at VCC = 3.3 V. |
| 6 | C2− | passive | Negative terminal of charge-pump flying capacitor C2 connected to the internal charge pump. |
| 7 | V− | power_out | Negative charge-pump output supply for the drivers, which is raised toward GND when the device is powered down. |
| 8 | DOUT2 | output | RS-232 line driver 2 output, with a driver output voltage range of −13.2 V to 13.2 V. |
| 9 | RIN2 | input | RS-232 receiver 2 input, rated for ±25 V; see review note on the RIN2/ROUT2 pin assignment. |
| 10 | ROUT2 | output | Receiver 2 CMOS output, which goes high-impedance when EN is high; see review note on the RIN2/ROUT2 pin assignment. |
| 11 | NC | unconnected | No internal connection. |
| 12 | DIN2 | input | Driver 2 TTL/CMOS logic input, which is accepted up to 5.5 V and must be at least 2 V (3.3 V supply) or 2.4 V (5 V supply) high. |
| 13 | DIN1 | input | Driver 1 TTL/CMOS logic input, which is accepted up to 5.5 V and must be at least 2 V (3.3 V supply) or 2.4 V (5 V supply) high. |
| 14 | NC | unconnected | No internal connection. |
| 15 | ROUT1 | output | Receiver 1 CMOS output, which goes high-impedance when EN is high. |
| 16 | RIN1 | input | RS-232 receiver 1 input, rated for ±25 V. |
| 17 | DOUT1 | output | RS-232 line driver 1 output, with a driver output voltage range of −13.2 V to 13.2 V. |
| 18 | GND | power_in | Network ground reference for all voltages on the device. |
| 19 | VCC | power_in | Supply voltage, specified at 3 V to 3.6 V or 4.5 V to 5.5 V, and the device operates from a single 3 V to 5.5 V supply. |
| 20 | PWRDOWN | input | Power-down control input; driving it low places the drivers in high impedance, disables the charge pump, and draws only 1 µA from the supply. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SOIC-20-300mil |
| Category | Interface |
| Pins | 20 |
CAD (KiCad official)
- Symbol:
SN65C3222DWR - Footprint:
Package_SO:SOIC-20W_7.5x12.8mm_P1.27mm - 3D model: SOIC-20-300mil (KiCad packages3D, STEP)
- 3D model files:
sn65c3222dwr-etched.step/sn65c3222dwr-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);sn65c3222dwr.step/sn65c3222dwr.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Texas Instruments datasheet (23 pp, sha256
4ef64ba45a81c5df, retrieved 2026-10-08, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-haiku-5-5(text), consensusclaude-sonnet-5-5(agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish. - CAD: KiCad official libraries (CC-BY-SA 4.0).