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MAX3237ECDBR

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Texas Instruments RS232 ICs, SSOP-28-208mil. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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MAX3237ECDBR

Texas Instruments · RS232 ICs · SSOP-28-208mil

MAX3237ECDBR from Texas Instruments, in a SSOP-28-208mil. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin Name Type Function
1 C2+ passive Positive terminal for external 0.1µF charge pump capacitor.
2 GND power_in Ground reference for all supplies and logic signals.
3 C2− passive Negative terminal for external 0.1µF charge pump capacitor.
4 V− power_out Negative supply output from charge pump, range 0 to -7V with respect to GND.
5 DOUT1 tri_state RS-232 driver output 1, ±5.4V maximum, high-impedance when SHDN=GND.
6 DOUT2 tri_state RS-232 driver output 2, ±5.4V maximum, high-impedance when SHDN=GND.
7 DOUT3 tri_state RS-232 driver output 3, ±5.4V maximum, high-impedance when SHDN=GND.
8 RIN1 input RS-232 receiver input 1, accepts -25V to +25V with 2V threshold at VCC=5V.
9 RIN2 input RS-232 receiver input 2, accepts -25V to +25V with 2V threshold at VCC=5V.
10 DOUT4 tri_state RS-232 driver output 4, ±5.4V maximum, high-impedance when SHDN=GND.
11 RIN3 input RS-232 receiver input 3, accepts -25V to +25V with 2V threshold at VCC=5V.
12 DOUT5 tri_state RS-232 driver output 5, ±5.4V maximum, high-impedance when SHDN=GND.
13 EN input Receiver output enable control input; high disables ROUT outputs except ROUT1B.
14 SHDN input Shutdown control input; low disables drivers and charge pump reducing supply current to less than 1mA.
15 MBAUD input Baud rate selection input; GND selects 250kbaud, VCC selects 1Mbaud operation.
16 ROUT1B output Receiver output 1B, TTL/CMOS logic level, always active regardless of EN and SHDN state.
17 DIN5 input TTL/CMOS driver input 5, logic levels VIH=2V minimum, VIL=0.8V maximum.
18 ROUT3 tri_state Receiver output 3, TTL/CMOS logic level VOL=0.4V, disabled when EN=VCC.
19 DIN4 input TTL/CMOS driver input 4, logic levels VIH=2V minimum, VIL=0.8V maximum.
20 ROUT2 tri_state Receiver output 2, TTL/CMOS logic level VOL=0.4V, disabled when EN=VCC.
21 ROUT1 tri_state Receiver output 1, TTL/CMOS logic level VOL=0.4V, disabled when EN=VCC.
22 DIN3 input TTL/CMOS driver input 3, logic levels VIH=2V minimum, VIL=0.8V maximum.
23 DIN2 input TTL/CMOS driver input 2, logic levels VIH=2V minimum, VIL=0.8V maximum.
24 DIN1 input TTL/CMOS driver input 1, logic levels VIH=2V minimum, VIL=0.8V maximum.
25 C1− passive Negative terminal for external 0.1µF charge pump capacitor.
26 VCC power_in Positive power supply input voltage, 3V to 5.5V recommended operating range.
27 V+ power_out Positive supply output from internal charge pump, 3V to 7V typical with respect to GND.
28 C1+ passive Positive terminal for external 0.1µF charge pump capacitor.

Key specifications

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

CAD (KiCad official)

  • Symbol: MAX3237ECDBR
  • Footprint: Package_SO:SSOP-28_5.3x10.2mm_P0.65mm
  • 3D model: SSOP-28-208mil (KiCad packages3D, STEP)
  • 3D model files: max3237ecdbr-etched.step / max3237ecdbr-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); max3237ecdbr.step / max3237ecdbr.glb are the bare package body.

Provenance

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

  • Datasheet: Texas Instruments datasheet (20 pp, sha256 3c7a0153f3fbbd48, retrieved 2026-10-03, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-haiku-4-5-20251001 (text), consensus claude-sonnet-5-5 (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