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ST3241EBPR

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

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ST3241EBPR

STMicroelectronics · RS232 ICs · SSOP-28-208mil

ST3241EBPR from STMicroelectronics, 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 inverting charge pump capacitor (C2 is connected between pins 1 and 2, specified as 0.1 µF to 0.47 µF in the application table depending on VCC).
2 C2- passive Negative terminal of the inverting charge pump capacitor.
3 V- power_out -5.5 V output generated by the charge pump, with an extra negative voltage limit of 7 V magnitude (absolute maximum).
4 R1IN input First RS-232 receiver input, with an operating input voltage range of -25 V to 25 V.
5 R2IN input Second RS-232 receiver input, with an operating input voltage range of -25 V to 25 V.
6 R3IN input Third RS-232 receiver input, with an operating input voltage range of -25 V to 25 V.
7 R4IN input Fourth RS-232 receiver input, with an operating input voltage range of -25 V to 25 V.
8 R5IN input Fifth RS-232 receiver input, with an operating input voltage range of -25 V to 25 V.
9 T1OUT output First RS-232 transmitter output, with a voltage swing of ±5 V minimum into a 3 kΩ load and short-circuit protection (one output at a time).
10 T2OUT output Second RS-232 transmitter output, with a voltage swing of ±5 V minimum into a 3 kΩ load and short-circuit protection (one output at a time).
11 T3OUT output Third RS-232 transmitter output, with a voltage swing of ±5 V minimum into a 3 kΩ load and short-circuit protection (one output at a time).
12 T3IN input Third transmitter logic input, with a maximum input voltage of 6 V (absolute maximum) and a logic threshold high of 2 V at VCC = 3.3 V.
13 T2IN input Second transmitter logic input, with a maximum input voltage of 6 V (absolute maximum) and a logic threshold high of 2 V at VCC = 3.3 V.
14 T1IN input First transmitter logic input, with a maximum input voltage of 6 V (absolute maximum) and a logic threshold high of 2 V at VCC = 3.3 V.
15 R5OUT output Fifth receiver logic output, with output voltage high of VCC - 0.1 V minimum at IOUT = -1 mA.
16 R4OUT output Fourth receiver logic output, with output voltage high of VCC - 0.1 V minimum at IOUT = -1 mA.
17 R3OUT output Third receiver logic output, with output voltage high of VCC - 0.1 V minimum at IOUT = -1 mA.
18 R2OUT output Second receiver logic output, which is always active to provide the wake-up function for the serial port.
19 R1OUT output First receiver logic output, with output voltage low of 0.4 V maximum at IOUT = 1.6 mA.
20 R2OUTB output Non-inverting complementary receiver output, always active for wake-up.
21 R1OUTB output Non-inverting complementary receiver output, always active for wake-up.
22 SHDN input Shutdown control input, active low, with a logic threshold low of 0.8 V maximum.
23 EN input Receiver enable input, active low, with a logic threshold low of 0.8 V maximum.
24 C1- passive Negative terminal of the voltage-doubler charge pump capacitor.
25 GND power_in Ground reference for the device.
26 VCC power_in Supply voltage, specified from 3 V to 5.5 V.
27 V+ power_out +5.5 V output generated by the charge pump, with an extra positive voltage limit of 7 V magnitude (absolute maximum).
28 C1+ passive Positive terminal of the voltage-doubler charge pump capacitor.

Key specifications

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

CAD (KiCad official)

  • Symbol: ST3241EBPR
  • Footprint: Package_SO:SSOP-28_5.3x10.2mm_P0.65mm
  • 3D model: SSOP-28-208mil (KiCad packages3D, STEP)
  • 3D model files: st3241ebpr-etched.step / st3241ebpr-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); st3241ebpr.step / st3241ebpr.glb are the bare package body.

Provenance

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

  • Datasheet: STMicroelectronics datasheet (14 pp, sha256 3aa1c70966b2daf6, 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