component

TRS3237ECDBR

Public Made by Adom

by adom

Texas Instruments RS232 ICs, SSOP-28-208mil. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

componentinterfacetrs3237ecdbrfactory-2.0.0extractor-text
Overview Files Discover Packages Releases Dependencies Issues Breadcrumbs Pull Requests Activity

3D Model

Open in new tab ↗
Loads when you scroll to it. Unloads after 5 minutes in the background.

Symbol & Footprint

Schematic Symbol

Open full view ↗
Loads when you scroll to it. Unloads after 5 minutes in the background.

PCB Footprint

Open full view ↗
Loads when you scroll to it. Unloads after 5 minutes in the background.

Datasheet

Open in new tab ↗
Loads when you scroll to it. Unloads after 5 minutes in the background.
Download PDF
Contents

README

markdown

TRS3237ECDBR

Texas Instruments · RS232 ICs · SSOP-28-208mil

TRS3237ECDBR from Texas Instruments, in a SSOP-28-208mil. 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 C2+ passive Positive terminal of charge-pump capacitor C2 of the dual charge pump; the device uses four external capacitors (C1-C4) for operation from 3 V to 5.5 V.
2 GND power_in Network ground; all device voltages are referenced to network GND.
3 C2− passive Negative terminal of charge-pump capacitor C2 of the dual charge pump.
4 V− power_out Charge-pump generated negative supply for the RS-232 drivers; rated to −7 V absolute maximum, with V+ − V− not exceeding 13 V.
5 DOUT1 output RS-232 driver output 1, rated ±13.2 V absolute maximum and forced to high impedance when SHDN = GND.
6 DOUT2 output RS-232 driver output 2, rated ±13.2 V absolute maximum and forced to high impedance when SHDN = GND.
7 DOUT3 output RS-232 driver output 3, rated ±13.2 V absolute maximum and forced to high impedance when SHDN = GND.
8 RIN1 input RS-232 receiver input 1, rated for ±25 V input voltage with 3 kΩ to 7 kΩ input resistance.
9 RIN2 input RS-232 receiver input 2, rated for ±25 V input voltage with 3 kΩ to 7 kΩ input resistance.
10 DOUT4 output RS-232 driver output 4, rated ±13.2 V absolute maximum and forced to high impedance when SHDN = GND.
11 RIN3 input RS-232 receiver input 3, rated for ±25 V input voltage with 3 kΩ to 7 kΩ input resistance.
12 DOUT5 output RS-232 driver output 5, rated ±13.2 V absolute maximum and forced to high impedance when SHDN = GND.
13 EN input Receiver enable input; setting EN high places the receiver outputs (except ROUT1B) in high impedance.
14 SHDN input Shutdown input; driving SHDN to GND disables the transmitters, forces DOUT high impedance, disables the charge pump and limits supply current to less than 1 mA.
15 MBAUD input Data-rate select input; GND selects 250 kbit/s operation and VCC selects up to 1 Mbit/s operation.
16 ROUT1B output Receiver output 1B, remains active regardless of the EN and SHDN states.
17 DIN5 input Driver input 5 logic input; VIL maximum 0.8 V and VIH from 2 V (3.3 V supply) or 2.4 V (5 V supply), rated to 6 V absolute maximum.
18 ROUT3 output Receiver logic output 3, with VOH of at least VCC − 0.6 V at IOH = −1 mA.
19 DIN4 input Driver input 4 logic input; VIL maximum 0.8 V and VIH from 2 V (3.3 V supply) or 2.4 V (5 V supply), rated to 6 V absolute maximum.
20 ROUT2 output Receiver logic output 2, with VOH of at least VCC − 0.6 V at IOH = −1 mA.
21 ROUT1 output Receiver logic output 1, with VOH of at least VCC − 0.6 V at IOH = −1 mA.
22 DIN3 input Driver input 3 logic input; VIL maximum 0.8 V and VIH from 2 V (3.3 V supply) or 2.4 V (5 V supply), rated to 6 V absolute maximum.
23 DIN2 input Driver input 2 logic input; VIL maximum 0.8 V and VIH from 2 V (3.3 V supply) or 2.4 V (5 V supply), rated to 6 V absolute maximum.
24 DIN1 input Driver input 1 logic input; VIL maximum 0.8 V and VIH from 2 V (3.3 V supply) or 2.4 V (5 V supply), rated to 6 V absolute maximum.
25 C1− passive Negative terminal of charge-pump capacitor C1 of the dual charge pump.
26 VCC power_in Supply voltage input, 3 V to 5.5 V (3.3 V ±0.3 V or 5 V ±0.5 V), with −0.3 V to 6 V absolute maximum.
27 V+ power_out Charge-pump generated positive supply for the RS-232 drivers; rated to 7 V absolute maximum.
28 C1+ passive Positive terminal of charge-pump capacitor C1 of the dual charge pump.

Key specifications

Parameter Value
Manufacturer Texas Instruments
Package SSOP-28-208mil
Category Interface
Pins 28

CAD (KiCad official)

  • Symbol: TRS3237ECDBR
  • Footprint: Package_SO:SSOP-28_5.3x10.2mm_P0.65mm
  • 3D model: SSOP-28-208mil (KiCad packages3D, STEP)
  • 3D model files: trs3237ecdbr-etched.step / trs3237ecdbr-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); trs3237ecdbr.step / trs3237ecdbr.glb are the bare package body.

Provenance

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

  • Datasheet: Texas Instruments datasheet (18 pp, sha256 b972aab2d1469ca9, 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