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Contents

Pinout
Key specifications
CAD (KiCad official)
Provenance

README

markdown

SN65C3223DBR

Texas Instruments · RS232 ICs · SSOP-20-208mil

SN65C3223DBR from Texas Instruments, in a SSOP-20-208mil. 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	Receiver enable input; with EN high the receiver outputs ROUT are high-impedance, with EN low they are active (input range 0 to 5.5 V, VIL 0.8 V max).
2	C1+	passive	Positive terminal of charge-pump capacitor C1 (0.1 µF at VCC = 3.3 V ± 0.3 V, 0.047 µF at 5 V ± 0.5 V).
3	V+	power_out	Positive charge-pump output supply for RS-232 drivers, with absolute maximum of 7 V and a 0.1 µF capacitor to the supply rail.
4	C1−	passive	Negative terminal of charge-pump capacitor C1.
5	C2+	passive	Positive terminal of charge-pump capacitor C2 (0.1 µF at 3.3 V ± 0.3 V, 0.33 µF at 5 V ± 0.5 V).
6	C2−	passive	Negative terminal of charge-pump capacitor C2.
7	V−	power_out	Negative charge-pump output supply for RS-232 drivers, with absolute maximum of −7 V and a capacitor to GND.
8	DOUT2	output	RS-232 driver 2 output, swinging at least ±5 V into 3 kΩ with ±15 kV HBM ESD protection.
9	RIN2	input	RS-232 receiver 2 input, accepting −25 V to 25 V with 5 kΩ nominal input resistance and ±15 kV HBM ESD protection.
10	ROUT2	tri_state	Receiver 2 logic output, high-impedance when EN is high.
11	INVALID	output	Valid-signal output that is high if any receiver input is above 2.7 V or below −2.7 V, and low if the inputs stay between −0.3 V and 0.3 V for more than 30 µs.
12	DIN2	input	Driver 2 logic input, 0 to 5.5 V with VIL 0.8 V max.
13	DIN1	input	Driver 1 logic input, 0 to 5.5 V with VIL 0.8 V max.
14	FORCEON	input	Forces drivers on when high with FORCEOFF high, disabling auto-powerdown; low enables auto-powerdown.
15	ROUT1	tri_state	Receiver 1 logic output, high-impedance when EN is high.
16	RIN1	input	RS-232 receiver 1 input, accepting −25 V to 25 V with 5 kΩ nominal input resistance and ±15 kV HBM ESD protection.
17	DOUT1	output	RS-232 driver 1 output, swinging at least ±5 V into 3 kΩ with ±15 kV HBM ESD protection.
18	GND	power_in	Ground reference for all voltages, with ±15 kV HBM ESD protection.
19	VCC	power_in	Supply voltage of 3 V to 5.5 V, bypassed with 0.1 µF.
20	FORCEOFF	input	When low, shuts off drivers and receivers (supply current 1 µA typ); high allows normal or auto-powerdown operation.

Key specifications

Parameter	Value
Manufacturer	Texas Instruments
Package	SSOP-20-208mil
Category	Interface
Pins	20

CAD (KiCad official)

Symbol: SN65C3223DBR
Footprint: Package_SO:SSOP-20_5.3x7.2mm_P0.65mm
3D model: SSOP-20-208mil (KiCad packages3D, STEP)
3D model files: sn65c3223dbr-etched.step / sn65c3223dbr-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); sn65c3223dbr.step / sn65c3223dbr.glb are the bare package body.

Provenance

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

Datasheet: Texas Instruments datasheet (24 pp, sha256 e7cf2d2a015093c5, retrieved 2026-10-11, 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