MAX3223ECDBR

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

MAX3223ECDBR 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; low enables the receiver outputs and high puts ROUT1/ROUT2 in high impedance (input range 0 to 5.5 V).
2	C1+	passive	Charge-pump capacitor C1 positive terminal (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 levels, bypassed with a capacitor to GND (absolute max 7 V).
4	C1−	passive	Charge-pump capacitor C1 negative terminal.
5	C2+	passive	Charge-pump capacitor C2 positive terminal (0.1 µF at 3.3 V, 0.33 µF at 5 V).
6	C2−	passive	Charge-pump capacitor C2 negative terminal.
7	V−	power_out	Negative charge-pump output supply for RS-232 levels, bypassed with a capacitor to GND (absolute max −7 V).
8	DOUT2	output	RS-232 driver 2 output with ±15 kV HBM ESD protection and ±13.2 V absolute maximum output range.
9	RIN2	input	RS-232 receiver 2 input with 5 kΩ nominal resistance, ±25 V input range and ±15 kV HBM ESD protection.
10	ROUT2	output	Receiver 2 logic output, high impedance when EN is high.
11	INVALID	output	Valid-signal output that is high when any receiver input is beyond ±2.7 V (or within ±0.3 V for under 30 µs) and low when inputs stay between −0.3 V and 0.3 V for more than 30 µs.
12	DIN2	input	Driver 2 logic input (high-level 2 V min at 3.3 V, 2.4 V min at 5 V; 0.8 V max low; 5.5 V max).
13	DIN1	input	Driver 1 logic input (high-level 2 V min at 3.3 V, 2.4 V min at 5 V; 0.8 V max low; 5.5 V max).
14	FORCEON	input	Drives auto-powerdown control; high with FORCEOFF high disables auto-powerdown, low with FORCEOFF high enables it.
15	ROUT1	output	Receiver 1 logic output, high impedance when EN is high.
16	RIN1	input	RS-232 receiver 1 input with 5 kΩ nominal resistance, ±25 V input range and ±15 kV HBM ESD protection.
17	DOUT1	output	RS-232 driver 1 output with ±15 kV HBM ESD protection and ±13.2 V absolute maximum output range.
18	GND	power_in	Ground; ESD-protected against RS-232 bus pins to ±15 kV HBM.
19	VCC	power_in	Supply voltage 3 V to 3.6 V or 4.5 V to 5.5 V (absolute max 6 V), bypassed with a ceramic capacitor.
20	FORCEOFF	input	Active-low power-down control; low turns off drivers and charge pump (ICC about 1 µA), 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: MAX3223ECDBR
Footprint: Package_SO:SSOP-20_5.3x7.2mm_P0.65mm
3D model: SSOP-20-208mil (KiCad packages3D, STEP)
3D model files: max3223ecdbr-etched.step / max3223ecdbr-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); max3223ecdbr.step / max3223ecdbr.glb are the bare package body.

Provenance

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

Datasheet: Texas Instruments datasheet (28 pp, sha256 45ca048c81e9b2a5, retrieved 2026-10-08, 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

# MAX3223ECDBR

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

MAX3223ECDBR 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; low enables the receiver outputs and high puts ROUT1/ROUT2 in high impedance (input range 0 to 5.5 V). |
| 2 | C1+ | passive | Charge-pump capacitor C1 positive terminal (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 levels, bypassed with a capacitor to GND (absolute max 7 V). |
| 4 | C1− | passive | Charge-pump capacitor C1 negative terminal. |
| 5 | C2+ | passive | Charge-pump capacitor C2 positive terminal (0.1 µF at 3.3 V, 0.33 µF at 5 V). |
| 6 | C2− | passive | Charge-pump capacitor C2 negative terminal. |
| 7 | V− | power_out | Negative charge-pump output supply for RS-232 levels, bypassed with a capacitor to GND (absolute max −7 V). |
| 8 | DOUT2 | output | RS-232 driver 2 output with ±15 kV HBM ESD protection and ±13.2 V absolute maximum output range. |
| 9 | RIN2 | input | RS-232 receiver 2 input with 5 kΩ nominal resistance, ±25 V input range and ±15 kV HBM ESD protection. |
| 10 | ROUT2 | output | Receiver 2 logic output, high impedance when EN is high. |
| 11 | INVALID | output | Valid-signal output that is high when any receiver input is beyond ±2.7 V (or within ±0.3 V for under 30 µs) and low when inputs stay between −0.3 V and 0.3 V for more than 30 µs. |
| 12 | DIN2 | input | Driver 2 logic input (high-level 2 V min at 3.3 V, 2.4 V min at 5 V; 0.8 V max low; 5.5 V max). |
| 13 | DIN1 | input | Driver 1 logic input (high-level 2 V min at 3.3 V, 2.4 V min at 5 V; 0.8 V max low; 5.5 V max). |
| 14 | FORCEON | input | Drives auto-powerdown control; high with FORCEOFF high disables auto-powerdown, low with FORCEOFF high enables it. |
| 15 | ROUT1 | output | Receiver 1 logic output, high impedance when EN is high. |
| 16 | RIN1 | input | RS-232 receiver 1 input with 5 kΩ nominal resistance, ±25 V input range and ±15 kV HBM ESD protection. |
| 17 | DOUT1 | output | RS-232 driver 1 output with ±15 kV HBM ESD protection and ±13.2 V absolute maximum output range. |
| 18 | GND | power_in | Ground; ESD-protected against RS-232 bus pins to ±15 kV HBM. |
| 19 | VCC | power_in | Supply voltage 3 V to 3.6 V or 4.5 V to 5.5 V (absolute max 6 V), bypassed with a ceramic capacitor. |
| 20 | FORCEOFF | input | Active-low power-down control; low turns off drivers and charge pump (ICC about 1 µA), 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: `MAX3223ECDBR`
- Footprint: `Package_SO:SSOP-20_5.3x7.2mm_P0.65mm`
- 3D model: SSOP-20-208mil (KiCad packages3D, STEP)
- 3D model files: `max3223ecdbr-etched.step` / `max3223ecdbr-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `max3223ecdbr.step` / `max3223ecdbr.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Texas Instruments datasheet](https://www.ti.com/cn/lit/gpn/max3223e) (28 pp, sha256 `45ca048c81e9b2a5`, retrieved 2026-10-08, 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](docs/max3223ecdbr-datasheet.pdf)