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SP3243EBCA-L

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by Ray

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

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Contents

README

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SP3243EBCA-L

MaxLinear · RS232 ICs · SSOP-28-208mil

SP3243EBCA-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 inverting charge-pump capacitor C2 (0.1µF to C2-).
2 C2- passive Negative terminal of the inverting charge-pump capacitor C2 (0.1µF to C2+).
3 V- power_out Regulated -5.5V output generated by the internal charge pump. Bypass to GND with a 0.1µF capacitor.
4 R1IN input RS-232 receiver 1 input (±25V tolerant). Accepts RS-232 line levels; internally biased with a 5kΩ pull-down.
5 R2IN input RS-232 receiver 2 input (±25V tolerant). Drives both R2OUT (pin 18) and the always-active complementary R2OUTB (pin 20).
6 R3IN input RS-232 receiver 3 input (±25V tolerant).
7 R4IN input RS-232 receiver 4 input (±25V tolerant).
8 R5IN input RS-232 receiver 5 input (±25V tolerant).
9 T1OUT output RS-232 driver 1 output. Delivers ±5.0V min swing into a 3kΩ load. Slew-rate-limited on the EB variant to meet 250kbps.
10 T2OUT output RS-232 driver 2 output. Delivers ±5.0V min swing into a 3kΩ load.
11 T3OUT output RS-232 driver 3 output. Delivers ±5.0V min swing into a 3kΩ load.
12 T3IN input TTL/CMOS driver 3 input. Logic HIGH ≥ 2.0V, logic LOW ≤ 0.8V. Internal pull-up keeps line idle when floating.
13 T2IN input TTL/CMOS driver 2 input. Internal pull-up.
14 T1IN input TTL/CMOS driver 1 input. Internal pull-up.
15 R5OUT output TTL/CMOS receiver 5 output (inverted from R5IN). Rail-to-rail CMOS levels referenced to VCC.
16 R4OUT output TTL/CMOS receiver 4 output (inverted from R4IN).
17 R3OUT output TTL/CMOS receiver 3 output (inverted from R3IN).
18 R2OUT output TTL/CMOS receiver 2 output (inverted from R2IN). Three-state / disabled in shutdown; use R2OUTB (pin 20) to monitor while shut down.
19 R1OUT output TTL/CMOS receiver 1 output (inverted from R1IN).
20 R2OUTB output Non-inverting receiver-2 output, remains active in shutdown so an external device's Ring Indicate line can be monitored while the transceiver's charge pump is off.
21 STATUS output TTL/CMOS status output. HIGH when the device is online (drivers active); LOW when in AUTO-ONLINE shutdown. Referenced to VCC.
22 SHUTDOWN input Active-low shutdown input. Logic LOW forces the drivers and charge pump off (ICC ≤ 1µA); overrides both AUTO-ONLINE and ONLINE per Table 6.
23 ONLINE input Force-online input. Logic HIGH overrides AUTO-ONLINE circuitry and keeps the drivers active as long as SHUTDOWN is also HIGH (see Table 6).
24 C1- passive Negative terminal of the voltage-doubler charge-pump capacitor C1 (0.1µF to C1+).
25 GND power_in Ground reference for the device and all capacitor return currents.
26 VCC power_in Primary supply voltage, +3.0V to +5.5V. Bypass to GND with a 0.1µF capacitor close to the pin.
27 V+ power_out Regulated +5.5V output generated by the internal charge pump. Bypass to GND with a 0.1µF capacitor.
28 C1+ passive Positive terminal of the voltage-doubler charge-pump capacitor C1 (0.1µF to C1-).

Key specifications

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

Ordering variants

Same part, different packaging or reel option.

  • SP3243EBCA-L/TR
  • SP3243EBEA-L/TR
  • SP3243ECA-L
  • SP3243ECA-L/TR
  • SP3243EEA-L
  • SP3243EEA-L/TR
  • SP3243EHCA-L/TR
  • SP3243EHEA-L/TR
  • SP3243EUCA-L/TR
  • SP3243EUEA-L/TR
  • SP3243EBCY-L/TR
  • SP3243EBEY-L
  • SP3243EBEY-L/TR
  • SP3243ECY-L/TR
  • SP3243EEY-L
  • SP3243EEY-L/TR
  • SP3243EUCY-L/TR
  • SP3243EUEY-L/TR
  • SP3243EUER-L/TR

CAD (KiCad official)

  • Symbol: SP3243EBCA-L
  • Footprint: Package_SO:SSOP-28_5.3x10.2mm_P0.65mm
  • 3D model: SSOP-28-208mil (KiCad packages3D, STEP)

Provenance

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

  • Datasheet: MaxLinear datasheet (None pp, sha256 ea4b22b2d3fb360a, 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