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SP3238EEA-L

Public Made by Adom

by adom

MaxLinear RS232 ICs, SSOP-28-208mil. Datasheet-verified pinout, KiCad symbol/footprint/3D.

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Contents

README

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SP3238EEA-L

MaxLinear · RS232 ICs · SSOP-28-208mil

SP3238EEA-L from MaxLinear, in a SSOP-28-208mil. 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 C2+ passive Positive terminal of the symmetrical charge-pump capacitor C2; connect to external 0.1µF to 0.33µF capacitor.
2 GND power_in Ground reference for the device.
3 C2- passive Negative terminal of the symmetrical charge-pump capacitor C2; connect to external 0.1µF to 0.33µF capacitor.
4 V- power_out Regulated -5.5V output generated by the internal charge pump; maximum magnitude 7V per absolute maximum ratings.
5 T1OUT output RS-232 Driver Output for transmitter 1; voltage swing +5.0V minimum fully loaded with 3kΩ, short-circuit duration continuous.
6 T2OUT output RS-232 Driver Output for transmitter 2; voltage swing +5.0V minimum fully loaded with 3kΩ, short-circuit duration continuous.
7 T3OUT output RS-232 Driver Output for transmitter 3; voltage swing +5.0V minimum fully loaded with 3kΩ, short-circuit duration continuous.
8 R1IN input RS-232 receiver input for channel 1; input voltage range -25V to +25V with input hysteresis 0.5V typical.
9 R2IN input RS-232 receiver input for channel 2; input voltage range -25V to +25V with input hysteresis 0.5V typical.
10 T4OUT output RS-232 Driver Output for transmitter 4; voltage swing +5.0V minimum fully loaded with 3kΩ, short-circuit duration continuous.
11 R3IN input RS-232 receiver input for channel 3; input voltage range -25V to +25V with input hysteresis 0.5V typical.
12 T5OUT output RS-232 Driver Output for transmitter 5; voltage swing +5.0V minimum fully loaded with 3kΩ, short-circuit duration continuous.
13 ONLINE input Logic input (0 to VCC) to override AUTO ON-LINE® circuitry; logic HIGH keeps drivers active when SHUTDOWN is also HIGH.
14 SHUTDOWN input Logic input (0 to VCC) to shut down drivers and charge pump; logic LOW activates shutdown mode with supply current less than 1µA.
15 STATUS output TTL/CMOS Output indicating if RS-232 signal is present on any receiver input; goes HIGH when external transmitters enabled and cable connected.
16 R1OUT output Non-Inverting receiver output from channel 1; active in shutdown mode, drives 0.4V LOW to (VCC-0.1V) HIGH with 1.6mA sink or 1.0mA source.
17 T5IN input TTL/CMOS driver input for transmitter 5; accepts 0 to VCC logic levels with 0.8V LOW and 2.4V HIGH thresholds.
18 R3OUT output TTL/CMOS receiver output from channel 3; drives 0.4V LOW to (VCC-0.1V) HIGH, high-impedance when receivers disabled.
19 T4IN input TTL/CMOS driver input for transmitter 4; accepts 0 to VCC logic levels with 0.8V LOW and 2.4V HIGH thresholds.
20 R2OUT output TTL/CMOS receiver output from channel 2; drives 0.4V LOW to (VCC-0.1V) HIGH, high-impedance when receivers disabled.
21 R1OUT output TTL/CMOS receiver output from channel 1; drives 0.4V LOW to (VCC-0.1V) HIGH, high-impedance when receivers disabled.
22 T3IN input TTL/CMOS driver input for transmitter 3; accepts 0 to VCC logic levels with 0.8V LOW and 2.4V HIGH thresholds.
23 T2IN input TTL/CMOS driver input for transmitter 2; accepts 0 to VCC logic levels with 0.8V LOW and 2.4V HIGH thresholds.
24 T1IN input TTL/CMOS driver input for transmitter 1; accepts 0 to VCC logic levels with 0.8V LOW and 2.4V HIGH thresholds.
25 C1- passive Negative terminal of the symmetrical charge-pump capacitor C1; connect to external 0.1µF to 0.047µF capacitor.
26 VCC power_in Supply voltage input; +3.0V to +5.5V operating range with maximum ICC ±100mA.
27 V+ power_out Regulated +5.5V output generated by the internal charge pump; maximum magnitude 7V per absolute maximum ratings.
28 C1+ passive Positive terminal of the symmetrical charge-pump capacitor C1; connect to external 0.1µF to 0.047µF capacitor.

Key specifications

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

CAD (KiCad official)

  • Symbol: SP3238EEA-L
  • Footprint: Package_SO:SSOP-28_5.3x10.2mm_P0.65mm
  • 3D model: SSOP-28-208mil (KiCad packages3D, STEP)
  • 3D model files: sp3238eea-l-etched.step / sp3238eea-l-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); sp3238eea-l.step / sp3238eea-l.glb are the bare package body.

Provenance

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

  • Datasheet: MaxLinear datasheet (20 pp, sha256 509a9d06aa065a68, retrieved 2026-09-21, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.2, primary claude-haiku-4-5-20251001 (text), consensus claude-sonnet-4-6 (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