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SN65C3221EDBR

Public Made by Adom

by adom

Texas Instruments RS232 ICs, SSOP-16-208mil. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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SN65C3221EDBR

Texas Instruments · RS232 ICs · SSOP-16-208mil

SN65C3221EDBR from Texas Instruments, in a SSOP-16-208mil. 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 Active-low receiver enable: a low input enables the ROUT output, and a high input forces ROUT to high impedance.
2 C1+ passive Positive terminal of the voltage-doubler charge-pump capacitor C1, connected to an external 0.1 µF (3.3 V) or 0.047 µF (5 V) capacitor.
3 V+ power_out Charge-pump output of nominally 5.5 V generated from VCC, which requires the external reservoir capacitor C4.
4 C1- passive Negative terminal of the voltage-doubler charge-pump capacitor C1.
5 C2+ passive Positive terminal of the voltage-doubler charge-pump capacitor C2.
6 C2- passive Negative terminal of the voltage-doubler charge-pump capacitor C2.
7 V- power_out Charge-pump output of nominally -5.5 V generated by the charge pump.
8 RIN input RS-232 receiver input, specified for input voltages of -25 V to 25 V.
9 ROUT output Receiver output (logic level), high impedance when EN is high.
10 INVALID output Invalid output pin: high when a valid RS-232 level is present on any RIN input, and low when all RIN inputs are unpowered.
11 DIN input Driver input (logic level) that controls the RS-232 driver output DOUT.
12 FORCEON input Automatic power-down control input: low enables auto-powerdown when FORCEOFF is high, and high together with FORCEOFF high disables auto-powerdown.
13 DOUT output RS-232 driver output, with output limits of ±13.2 V stated in the absolute maximum ratings.
14 GND power_in Ground reference for the device (network GND, all voltages are referenced to it).
15 VCC power_in Supply voltage of 3 V to 5.5 V.
16 FORCEOFF input Automatic power-down control input: a low input shuts down the driver and receiver and reduces supply current to 1 µA, and a high input allows normal operation.

Key specifications

Parameter Value
Manufacturer Texas Instruments
Package SSOP-16-208mil
Category Interface
Pins 16

CAD (KiCad official)

  • Symbol: SN65C3221EDBR
  • Footprint: Package_SO:SSOP-16_5.3x6.2mm_P0.65mm
  • 3D model: SSOP-16-208mil (KiCad packages3D, STEP)
  • 3D model files: sn65c3221edbr-etched.step / sn65c3221edbr-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); sn65c3221edbr.step / sn65c3221edbr.glb are the bare package body.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

  • Datasheet: Texas Instruments datasheet (26 pp, sha256 0bd3bc3fe025cd53, retrieved 2026-10-09, 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: 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