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sp3232eucn-l

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by Ray

MaxLinear RS-485/RS-422 ICs, SOIC-16. Datasheet-verified pinout, KiCad symbol/footprint/3D.

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SP3232EUCN-L

MaxLinear · RS-485/RS-422 ICs · SOIC-16

SP3232EUCN-L from MaxLinear, in a SOIC-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 capacitor C1. Connect a 0.1µF capacitor between C1+ and C1-.
2 V+ power_out +5.5V output generated by the internal charge pump. Bypass to GND with a 0.1µF capacitor (C3).
3 C1- passive Negative terminal of the voltage doubler charge-pump capacitor C1.
4 C2+ passive Positive terminal of the inverting charge-pump capacitor C2. Connect a 0.1µF capacitor between C2+ and C2-.
5 C2- passive Negative terminal of the inverting charge-pump capacitor C2.
6 V- power_out -5.5V output generated by the internal charge pump. Bypass to GND with a 0.1µF capacitor (C4).
7 T2OUT output RS-232 driver #2 output. Typical output swing ±5.4V no-load, ±5.0V minimum with 3kΩ load to GND. Protected against continuous short-circuit to GND.
8 R2IN input RS-232 receiver #2 input. Input voltage range ±15V. Input resistance typ. 5kΩ (3kΩ to 7kΩ). Typical hysteresis 300mV.
9 R2OUT output TTL/CMOS receiver #2 output. VOH ≥ VCC-0.6V at IOUT = -1.0mA; VOL ≤ 0.4V at IOUT = 1.6mA. Non-tri-state on SP3232EU (EN pin not present).
10 T2IN input TTL/CMOS driver #2 input. Logic thresholds: VIL ≤ 0.8V; VIH ≥ 2.0V (VCC=3.3V) or ≥2.4V (VCC=5.0V). No internal pull-up - tie unused inputs to VCC or GND.
11 T1IN input TTL/CMOS driver #1 input. Logic thresholds: VIL ≤ 0.8V; VIH ≥ 2.0V (VCC=3.3V) or ≥2.4V (VCC=5.0V). No internal pull-up - tie unused inputs to VCC or GND.
12 R1OUT output TTL/CMOS receiver #1 output. VOH ≥ VCC-0.6V at IOUT = -1.0mA; VOL ≤ 0.4V at IOUT = 1.6mA. Non-tri-state on SP3232EU (EN pin not present).
13 R1IN input RS-232 receiver #1 input. Input voltage range ±15V. Input resistance typ. 5kΩ (3kΩ to 7kΩ). Typical hysteresis 300mV.
14 T1OUT output RS-232 driver #1 output. Typical output swing ±5.4V no-load, ±5.0V minimum with 3kΩ load to GND. Protected against continuous short-circuit to GND.
15 GND power_in Ground reference (0V).
16 VCC power_in +3.0V to +5.5V supply voltage. Bypass to GND with 0.1µF (C5); for noise-sensitive apps, use a bypass cap of the same value as the charge-pump capacitor C1.

Key specifications

Parameter Value
Manufacturer MaxLinear
Package SOIC-16
Category Comm/UART
Pins 16

Ordering variants

  • SP3232EUCN-L
  • SP3232EUCN-L/TR
  • SP3232EUCN-LSP3232EUCY-L/TR
  • SP3232EUCN-LSP3232EUEY-L/TR
  • SP3232EUCN-LSP3232EUEA-L/TR

CAD (KiCad official)

  • Symbol: SP3232EUCN-L
  • Footprint: Package_SO:SOIC-16_3.9x9.9mm_P1.27mm
  • 3D model: SOIC-16 (KiCad packages3D, STEP)

Provenance

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

  • Datasheet: MaxLinear datasheet (None pp, sha256 fbf4a44ce23ab7c3, 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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