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um3232eeue

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by Ray

Union Semiconductor RS232 ICs, TSSOP-16. Datasheet-verified pinout, KiCad symbol/footprint/3D.

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UM3232EEUE

Union Semiconductor · RS232 ICs · TSSOP-16

UM3232EEUE from Union Semiconductor, in a TSSOP-16. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin Name Type Function
1 C1+ passive Positive terminal of the voltage-doubler charge-pump flying capacitor C1 (typically 0.1 µF; 0.47 µF for VCC=3.6-5.5V). Connect between C1+ and C1- (pin 3).
2 V+ power_out Positive voltage generated by the doubling charge pump, typically about +7V over VCC=3.0-5.5V. Bypass to GND with a 0.1 µF (or 0.47 µF) reservoir capacitor C3.
3 C1- passive Negative terminal of the voltage-doubler charge-pump flying capacitor C1 (typically 0.1 µF). Paired with C1+ (pin 1).
4 C2+ passive Positive terminal of the inverting charge-pump flying capacitor C2 (typically 0.1 µF). Paired with C2- (pin 5).
5 C2- passive Negative terminal of the inverting charge-pump flying capacitor C2 (typically 0.1 µF). Paired with C2+ (pin 4).
6 V- power_out Negative voltage generated by the inverting charge pump, typically about -7V. Bypass to GND with a 0.1 µF (or 0.47 µF) reservoir capacitor C4. Absolute maximum -7.5V to +0.3V.
7 T2OUT output RS-232 driver 2 output. EIA/TIA-232 level, typically ±6.0V swing into 3 kΩ / 1000 pF loads. Short-circuit current limited to ±60 mA. ESD-protected to ±15 kV (HBM).
8 R2IN input RS-232 receiver 2 input. Accepts ±30V input range with 3-7 kΩ input impedance (typ. 5 kΩ). Fail-safe: outputs logic high when open, shorted to GND, or connected to an undriven line. ESD-protected to ±15 kV (HBM).
9 R2OUT output Receiver 2 CMOS/TTL output (inverting). VOH ≥ 2.8V at VCC=3.3V, VOL ≤ 0.8V at IOUT=10 mA. Always active on UM3232E (no SHDN/EN control pins).
10 T2IN input Driver 2 CMOS/TTL input (inverting). VIL ≤ 0.8V, VIH ≥ 1.6V at VCC=3.3V (2.2V at VCC=5V). On UM3232E the driver input state is on hold when left undriven (no internal 400 kΩ pull-up as on UM3221E/UM3222E).
11 T1IN input Driver 1 CMOS/TTL input (inverting). VIL ≤ 0.8V, VIH ≥ 1.6V at VCC=3.3V (2.2V at VCC=5V). On UM3232E the driver input state is on hold when undriven.
12 R1OUT output Receiver 1 CMOS/TTL output (inverting). VOH ≥ 2.8V at VCC=3.3V, VOL ≤ 0.8V at IOUT=10 mA. Always active on UM3232E.
13 R1IN input RS-232 receiver 1 input. Accepts ±30V input range with 3-7 kΩ input impedance (typ. 5 kΩ). Fail-safe logic high when open, shorted, or undriven. ESD-protected to ±15 kV (HBM).
14 T1OUT output RS-232 driver 1 output. EIA/TIA-232 level, typically ±6.0V swing into 3 kΩ / 1000 pF loads. Short-circuit current limited to ±60 mA. ESD-protected to ±15 kV (HBM).
15 GND power_in Device ground reference. Common return for VCC, V+, V-, all charge-pump capacitors, and logic/RS-232 signals.
16 VCC power_in +3.0V to +5.5V supply voltage input. Typical ICC = 1.5 mA (no load). Bypass to GND with a 0.1 µF capacitor placed as close as possible to the pin.

Key specifications

Parameter Value
Manufacturer Union Semiconductor
Package TSSOP-16
Category Comm/UART
Pins 16

Ordering variants

  • UM3232EEUE
  • UM3232EEUEEESE
  • UM3232EEUEEEPE
  • UM3232EEUEEEAE

CAD (KiCad official)

  • Symbol: UM3232EEUE
  • Footprint: Package_SO:TSSOP-16_4.4x5mm_P0.65mm
  • 3D model: TSSOP-16 (KiCad packages3D, STEP)

Provenance

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

  • Datasheet: Union Semiconductor datasheet (None pp, sha256 fde01c56d659e171, retrieved 2026-08-17, tier: lcsc)
  • Extractor: ds2sf (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.
  • CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF

Symbol & Footprint

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