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MAX3221ECUE+T

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Maxim Integrated Pre-ordered Chips, TSSOP-16. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

componentinterface icsmax3221ecue+tfactory-2.0.0extractor-text

Verified MAX3221ECUE+T

by Ray · last 31 Oct 2026 · 1 record · files match
SymbolFootprint3D modelPins

Verification log 1 record

31 Oct 2026RayPublished by the parts factory: tier mfr, 16 pinsfiles match
SymbolFootprint3D modelPinsfor all variants
  • ✓component-page-verify: PASS
  • ✓cad_props: Datasheet, MPN and distributor properties match page.json
  • ✓component: MAX3221ECUE+T · TSSOP-16 · 16 pins
  • ✓copper: 16 copper pads, none touching another net
  • ✓datasheet: all 16 pin names found in the 19-page datasheet
  • ✓distributor: lcsc C2671492, digikey MAX3221ECUE+TTR-ND, mouser 700-MAX3221ECUET
  • ✓family: TSSOP-16_4.4x5mm_P0.65mm
  • ✓files: 7 declared files present
  • ✓hero: docs/hero.png 4000x2500
  • ✓lbr: OK: /tmp/cpv-7s6xutxf/x.lbr is a valid EAGLE .lbr with complete deviceset
  • ✓license: CC-BY-SA-4.0
  • ✓models_3d: 2 records
  • •package_fit (skip): no component.package_dims on the page: the model is unchecked against the datasheet drawing
  • ✓pads: 16 pins = 16 pads
  • ✓pose: 2 STEP(s) Z-up, seated, centred
  • ✓symbol: 16 pins agree
  • ✓visibility: public, source open
Evidencedatasheet
Verified files✓ max3221ecue-t.kicad_sym✓ max3221ecue-t.kicad_mod✓ max3221ecue-t.step
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MAX3221ECUE+T

Maxim Integrated · Pre-ordered Chips · TSSOP-16

MAX3221ECUE+T from Maxim Integrated, in a TSSOP-16. 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 EN input Receiver enable control: drive low for normal operation, drive high to force the receiver outputs (R_OUT) into a high-impedance state.
2 C1+ passive Positive terminal of the voltage doubler charge-pump capacitor (C1, 0.1µF for 3.3V operation).
3 V+ power_out +5.5V generated by the charge pump over the +3.0V to +5.5V VCC range.
4 C1- passive Negative terminal of the voltage doubler charge-pump capacitor.
5 C2+ passive Positive terminal of the inverting charge-pump capacitor.
6 C2- passive Negative terminal of the inverting charge-pump capacitor.
7 V- power_out -5.5V generated by the inverting charge pump over the +3.0V to +5.5V VCC range.
8 R1IN input RS-232 receiver input, rated for an input voltage range of ±25V.
9 R1OUT output TTL/CMOS inverting three-state receiver output, high-impedance when EN is high.
10 INVALID output Output of the valid signal detector: goes high when a valid RS-232 level is present on any receiver input, and is low otherwise.
11 T1IN input TTL/CMOS transmitter input; the transmitter inputs do not have pull-up resistors.
12 FORCEON input Drive high to override the automatic circuitry and keep transmitters and charge pump on (FORCEOFF must be high).
13 T1OUT output RS-232 transmitter output, forced to high impedance when FORCEOFF is driven low or AutoShutdown senses invalid levels on all receiver inputs.
14 GND power_in Ground reference.
15 VCC power_in +3.0V to +5.5V supply voltage.
16 FORCEOFF input Force-off input, active low: drive low to shut down the transmitters, receivers, and on-board charge pump, overriding AutoShutdown and FORCEON.

Key specifications

Parameter Value
Manufacturer Maxim Integrated
Package TSSOP-16
Category Interface ICs
Pins 16

Electrical characteristics

Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).

Parameter Symbol Min Typ Max Unit Conditions Page
Input Logic Threshold Low 0.8 V 2
Input Logic Threshold High 2.4 V 2
Output Voltage Low 0.4 V IOUT = 1.6mA 2
Input Leakage Current -1 0.01 1 µA T_IN, EN, FORCEON, FORCEOFF 2
Output Leakage Current (receiver) -10 0.05 10 µA R_OUT receivers disabled 2
Supply Current, AutoShutdown Disabled ICC 0.3 1 mA FORCEON = FORCEOFF = VCC, no load 2
Supply Current, Shutdown ICC 1 10 µA FORCEOFF = GND, all R_IN = GND 2
Supply Current, AutoShutdown ICC 1 10 µA FORCEON = GND, FORCEOFF = VCC, all R_IN open 2
INVALID Output Voltage Low 0.4 V IOUT = 1.6mA 2
Receiver Input Threshold to INVALID Output Low -0.3 0.3 V 2
Receiver Input Threshold to INVALID Output High -2.7 2.7 V 2
Output Short-Circuit Current -60 60 mA 3
Output Leakage Current (transmitter) -25 25 µA VOUT = ±12V, VCC = 0 or 3V to 5.5V, transmitters disabled 3
Output Resistance 300 Ω VCC = V+ = V- = 0, TOUT = ±2V 3
Output Resistance (upper limit) 10 MΩ VCC = V+ = V- = 0, TOUT = ±2V 3
Output Voltage Swing -5 5.4 V All transmitter outputs loaded with 3kΩ to ground 3
Input Threshold Low 0.6 1.2 V VCC = 3.3V 3
Input Threshold Low 0.8 1.5 V VCC = 5.0V 3
Input Threshold High 1.5 2.4 V VCC = 3.3V 3
Input Threshold High 1.8 2.4 V VCC = 5.0V 3
Input Resistance 3 5 7 kΩ 3
Input Voltage Range -25 25 V 3
ESD Protection, Human Body Model -15 15 kV 3
ESD Protection, IEC 1000-4-2 Contact Discharge -8 8 kV 3
ESD Protection, IEC 1000-4-2 Air-Gap Discharge -15 15 kV 3
Receiver Positive or Negative Threshold to INVALID High tINVH 1 µs VCC = 5V, Figure 5b 3
Receiver Positive or Negative Threshold to INVALID Low tINVL 30 µs VCC = 5V, Figure 5b 3
Receiver or Transmitter Edge to Transmitters Enabled tWU 100 µs VCC = 5V, Figure 5b 3
Maximum Data Rate 250 kbps 4
Transition-Region Slew Rate 6 30 V/µs VCC = 3.3V, RL = 3kΩ to 7kΩ, TA = +25°C, one transmitter switching 4
Receiver Skew /tPHL - tPLH/ 50 ns 4
Transmitter Skew /tPHL - tPLH/ 100 ns 4
Receiver Output Enable Time 200 ns Normal operation 4
Receiver Output Disable Time 200 ns Normal operation 4
VCC to GND VCC -0.3 6 V 2
V+ to GND V+ -0.3 7 V Note 1 2
V- to GND V- -7 0.3 V Note 1 2
V+ + /V-/ 13 V Note 1 2
T_IN, EN, FORCEON, FORCEOFF to GND -0.3 6 V 2
R_IN to GND -25 25 V 2
T_OUT to GND -13.2 13.2 V 2
R_OUT, R2OUTB, INVALID to GND -0.3 V Upper limit printed as VCC + 0.3V 2
Storage Temperature Range TSTG -65 160 °C 2
Lead Temperature (soldering, 10s) 300 °C 10s 2
Soldering Temperature (reflow) 260 °C 2
Operating Temperature Range TA 0 70 °C MAX32_ EC _ grade (MAX3221ECUE) 2
Supply Voltage VCC 3 5.5 V 2
Charge-pump capacitor C1 minimum C1 0.22 µF VCC = 3.0V to 5.5V (Table 3) 12
Charge-pump capacitor C2, C3, C4 minimum C2, C3, C4 1 µF VCC = 3.0V to 5.5V (Table 3) 12

CAD (KiCad official)

  • Symbol: MAX3221ECUE+T
  • Footprint: Package_SO:TSSOP-16_4.4x5mm_P0.65mm
  • 3D model: TSSOP-16 (KiCad packages3D, STEP)
  • 3D model files: max3221ecue-t-etched.step / max3221ecue-t-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); max3221ecue-t.step / max3221ecue-t.glb are the bare package body.

Provenance

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

  • Datasheet: Maxim Integrated datasheet (19 pp, sha256 05825bd0ffbc0555, retrieved 2026-10-31, tier: manufacturer)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-haiku-5-5 (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