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SN65C3222DWR

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by adom

Texas Instruments RS232 ICs, SOIC-20-300mil. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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SN65C3222DWR

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.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); sn65c3222dwr.step / sn65c3222dwr.glb are 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, primary claude-haiku-5-5 (text), consensus claude-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).

Datasheet PDF