component

sp3232ecn-l

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by Ray

MaxLinear RS232 ICs, SOIC-16. Datasheet-verified pinout, KiCad symbol/footprint/3D.

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README

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SP3232ECN-L

MaxLinear · RS232 ICs · SOIC-16

SP3232ECN-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. Connect the (+) side of the external 0.1µF flying capacitor C1 here.
2 V+ power_out +5.5V output generated by the internal charge pump. Bypass to GND with a 0.1µF capacitor (C3); may be returned to VCC or GND.
3 C1- passive Negative terminal of the voltage-doubler charge-pump capacitor. Connect the (-) side of the external 0.1µF flying capacitor C1 here.
4 C2+ passive Positive terminal of the inverting charge-pump capacitor. Connect the (+) side of the external 0.1µF flying capacitor C2 here.
5 C2- passive Negative terminal of the inverting charge-pump capacitor. Connect the (-) side of the external 0.1µF flying capacitor C2 here.
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. Inverting level-shifted output swinging to nominally +/-5.4V (min +/-5.0V into 3kΩ) from a TTL/CMOS input on T2IN. Short-circuit protected to GND continuously.
8 R2IN input RS-232 receiver #2 input. Accepts +/-15V (up to +/-25V absolute max) RS-232 line levels; internal 5kΩ pull-down to GND. Typical thresholds: VIL ~1.2V, VIH ~1.5V (at VCC = 3.3V) with ~300mV hysteresis.
9 R2OUT output TTL/CMOS receiver #2 output. Inverting logic-level output; VOL <= 0.4V @ 1.6mA, VOH >= VCC-0.6V @ -1.0mA.
10 T2IN input TTL/CMOS driver #2 input. VIL <= 0.8V, VIH >= 2.0V (VCC = 3.3V) / 2.4V (VCC = 5.0V), with ~250mV hysteresis. Drive HIGH or LOW; unused inputs should be tied to VCC or GND.
11 T1IN input TTL/CMOS driver #1 input. VIL <= 0.8V, VIH >= 2.0V (VCC = 3.3V) / 2.4V (VCC = 5.0V), ~250mV hysteresis. Do not float; tie unused inputs to VCC or GND.
12 R1OUT output TTL/CMOS receiver #1 output. Inverting logic-level output; VOL <= 0.4V @ 1.6mA, VOH >= VCC-0.6V @ -1.0mA.
13 R1IN input RS-232 receiver #1 input. Accepts +/-15V (+/-25V abs. max) RS-232 line levels; internal 5kΩ pull-down to GND (unconnected input commits R1OUT HIGH).
14 T1OUT output RS-232 driver #1 output. Inverting +/-5.4V (typ) swing into a 3kΩ / 1000pF load; short-circuit protected continuously to GND.
15 GND power_in Ground reference for the device and the charge pump. Also serves as return for the VSS storage capacitor C3.
16 VCC power_in 3.0V to 5.5V primary supply (abs. max 6.0V). Typical ICC ~0.3mA no-load @ 3.3V. Bypass to GND with a 0.1µF capacitor (C5) close to the pin.

Key specifications

Parameter Value
Manufacturer MaxLinear
Package SOIC-16
Category Interface
Pins 16

Ordering variants

Same part, different packaging or reel option.

  • SP3232ECN-L
  • SP3232ECN-L/TR

CAD (KiCad official)

  • Symbol: SP3232ECN-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 (21 pp, sha256 657cf6a156b351de, 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

Schematic Symbol

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PCB Footprint

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Datasheet

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