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TRS3243IDBR

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.

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TRS3243IDBR

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

TRS3243IDBR 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 the voltage-doubler charge-pump capacitor, with the capacitor value set per the VCC versus capacitor table (Table 9-1).
2 C2- passive Negative terminal of the voltage-doubler charge-pump capacitor, with the capacitor value set per the VCC versus capacitor table (Table 9-1).
3 V- power_out Negative charge-pump output voltage; the V- supply is rated to -7 V absolute maximum and the V+ - V- difference to 13 V.
4 RIN1 input RS-232 receiver input with a recommended input range of -25 V to 25 V and an input resistance of 3 kΩ to 7 kΩ.
5 RIN2 input RS-232 receiver input with a recommended input range of -25 V to 25 V and an input resistance of 3 kΩ to 7 kΩ; it also feeds the always-active ROUT2B output.
6 RIN3 input RS-232 receiver input with a recommended input range of -25 V to 25 V and an input resistance of 3 kΩ to 7 kΩ.
7 RIN4 input RS-232 receiver input with a recommended input range of -25 V to 25 V and an input resistance of 3 kΩ to 7 kΩ.
8 RIN5 input RS-232 receiver input with a recommended input range of -25 V to 25 V and an input resistance of 3 kΩ to 7 kΩ.
9 DOUT1 output RS-232 driver output with an absolute output range of -13.2 V to 13.2 V; it is high impedance when the device is powered off.
10 DOUT2 output RS-232 driver output with an absolute output range of -13.2 V to 13.2 V; it is high impedance when the device is powered off.
11 DOUT3 output RS-232 driver output with an absolute output range of -13.2 V to 13.2 V; it is high impedance when the device is powered off.
12 DIN3 input Driver logic input with a 0 V to 5.5 V input range, VIL maximum of 0.8 V, and VIH minimum of 2 V at VCC = 3.3 V or 2.4 V at VCC = 5 V.
13 DIN2 input Driver logic input with a 0 V to 5.5 V input range, VIL maximum of 0.8 V, and VIH minimum of 2 V at VCC = 3.3 V or 2.4 V at VCC = 5 V.
14 DIN1 input Driver logic input with a 0 V to 5.5 V input range, VIL maximum of 0.8 V, and VIH minimum of 2 V at VCC = 3.3 V or 2.4 V at VCC = 5 V.
15 ROUT5 output Receiver logic output that goes high for an open receiver input and is high impedance when the device is powered off.
16 ROUT4 output Receiver logic output that goes high for an open receiver input and is high impedance when the device is powered off.
17 ROUT3 output Receiver logic output that goes high for an open receiver input and is high impedance when the device is powered off.
18 ROUT2 output Receiver logic output that goes high for an open receiver input and is high impedance when the device is powered off.
19 ROUT1 output Receiver logic output that goes high for an open receiver input and is high impedance when the device is powered off.
20 ROUT2B output Always-active noninverting output of the RIN2 input that stays enabled while the device is powered down, allowing ring-indicator data transmission.
21 INVALID output Invalid-signal output that is high when any RIN input is a valid RS-232 level (above 2.7 V or below -2.7 V, or within ±0.3 V for less than 30 µs) and low when all RIN inputs are invalid.
22 FORCEOFF input Auto power-down control input with a 0 V to 5.5 V range; driving it low powers off all drivers and receivers except ROUT2B and reduces supply current to 1 µA.
23 FORCEON input Auto power-down control input with a 0 V to 5.5 V range; driving it high overrides automatic power down and keeps the drivers active.
24 C1- passive Negative terminal of the voltage-doubler charge-pump capacitor, with the capacitor value set per the VCC versus capacitor table (Table 9-1).
25 GND power_in Ground reference for the device and the RS-232 serial-port connection.
26 VCC power_in Supply voltage of 3 V to 5.5 V (6 V absolute maximum).
27 V+ power_out Positive charge-pump output voltage; absolute maximum rating of 7 V.
28 C1+ passive Positive terminal of the voltage-doubler charge-pump capacitor, with the capacitor value set per the VCC versus capacitor table (Table 9-1).

Key specifications

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

CAD (KiCad official)

  • Symbol: TRS3243IDBR
  • Footprint: Package_SO:SSOP-28_5.3x10.2mm_P0.65mm
  • 3D model: SSOP-28-208mil (KiCad packages3D, STEP)
  • 3D model files: trs3243idbr-etched.step / trs3243idbr-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); trs3243idbr.step / trs3243idbr.glb are the bare package body.

Provenance

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

  • Datasheet: Texas Instruments datasheet (26 pp, sha256 fe9a6533b614250b, 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