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SP3221EEY-L

Public Made by Adom

by adom

MaxLinear RS232 ICs, TSSOP-16. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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SP3221EEY-L

MaxLinear · RS232 ICs · TSSOP-16

SP3221EEY-L from MaxLinear, 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: apply logic LOW for normal operation, and logic HIGH to disable the receiver output into high-impedance.
2 C1+ passive Positive terminal of the voltage doubler charge-pump capacitor.
3 V+ power_out Regulated +5.5V output generated by the charge pump.
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 Regulated -5.5V output generated by the charge pump.
8 R1IN input RS-232 receiver input, which the datasheet states is pulled down internally through 5kΩ so an unconnected input commits R1OUT to HIGH.
9 R1OUT output TTL/CMOS inverting receiver output, which goes high-impedance when EN is logic HIGH.
10 STATUS output TTL/CMOS output indicating receiver signal activity, which goes LOW when the RS-232 cable is disconnected.
11 T1IN input TTL/CMOS driver input; unused driver inputs should be connected to GND or VCC.
12 ONLINE input Apply logic HIGH to override AUTO ON-LINE circuitry and keep the driver active, with SHUTDOWN also held at logic HIGH.
13 T1OUT output RS-232 driver output, protected against infinite short-circuits to ground.
14 GND power_in Ground reference for the device.
15 VCC power_in Supply voltage input, +3.0V to +5.5V.
16 SHUTDOWN input Apply logic LOW to shut down the drivers and charge pump, overriding all AUTO ON-LINE circuitry and the ONLINE pin.

Key specifications

Parameter Value
Manufacturer MaxLinear
Package TSSOP-16
Category Interface
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
Supply Current, AUTO ON-LINE 1 10 µA RxIN open, ONLINE = GND, SHUTDOWN = Vcc, TxIN = Vcc or GND, Vcc = +3.3V, TAMB = +25ºC 2
Supply Current, Shutdown 1 10 µA SHUTDOWN = GND, TxIN = Vcc or GND, Vcc = +3.3V, TAMB = +25ºC 2
Supply Current, AUTO ON-LINE Disabled 0.3 1 mA ONLINE = SHUTDOWN = Vcc, No Load, Vcc = +3.3V, TAMB = +25ºC 2
Input Logic Threshold HIGH 2 V Vcc = 3.3V or 5.0V, TxIN, EN, SHUTDOWN, ONLINE 2
Input Logic Threshold LOW 0.8 V Vcc = 3.3V or 5.0V, TxIN, EN, SHUTDOWN, ONLINE 2
Input Leakage Current -1 0.01 1 µA TAMB = +25ºC, Vin = 0V to Vcc (TxIN, EN, ONLINE, SHUTDOWN) 2
Output Leakage Current (RxOUT) -10 0.05 10 µA Receiver disabled, Vout = 0V to Vcc 2
Output Voltage LOW (RxOUT) 0.4 V IOUT = 1.6mA 2
Output Voltage Swing -5 5.4 5 V Driver output loaded with 3kΩ to GND, TAMB = +25ºC 3
Output Short-Circuit Current -60 60 mA Vout = 0V 3
Output Leakage Current (Driver) -25 25 µA Vcc = 0V or 3.0V to 5.5V, Vout = +/-12V, Driver disabled 3
Input Voltage Range -15 15 V 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
STATUS Output Voltage LOW 0.4 V IOUT = 1.6mA 3
Output Resistance 300 Ω Vcc = V+ = V- = 0V, Vout = +/-2V 3
Transition-Region Slew Rate 6 30 V/µs Vcc = 3.3V, RL = 3kΩ, CL = 150pF to 1000pF, TAMB = 25°C 4
Driver Skew │tPHL - tPLH│ 350 800 ns RL = 3kΩ, CL = 1000pF 4
Receiver Skew │tPHL - tPLH│ 50 800 ns CL = 150pF 4
Data Rate 250 kbps RL = 3kΩ, CL = 1000pF 4
Charge pump capacitor C1 - C4 (minimum) C1-C4 0.22 µF VCC 3.0V to 5.5V 12
Charge pump capacitor C1 - C4 (minimum) C1-C4 0.1 µF VCC 3.0V to 3.6V 12
Charge pump capacitor C1 (minimum) C1 0.047 µF VCC 4.5V to 5.5V 12
Charge pump capacitor C2 - C4 (minimum) C2-C4 0.33 µF VCC 4.5V to 5.5V 12
Supply voltage VCC 3 5.5 V TAMB = TMIN to TMAX 2
Operating ambient temperature TAMB -40 85 °C SP3221EEY-L/TR temperature range per ordering information 19
Supply voltage (absolute maximum) VCC -0.3 6 V 2
V+ (Note 1) V+ -0.3 7 V 2
V- (Note 1) V- -7 0.3 V 2
V+ + /V-/ (Note 1) V+ + /V-/ 13 V 2
DC VCC or GND current ICC 100 mA 2
Input voltage (TxIN, ONLINE, SHUTDOWN, EN) -0.3 V Printed as VCC + 0.3V (expression, max not numeric) 2
Input voltage (RxIN) 25 V 2
Output voltage (TxOUT) 13.2 V 2
Output voltage (RxOUT, STATUS) -0.3 V Printed as VCC + 0.3V (expression, max not numeric) 2
Storage temperature TSTG -65 150 °C 2
ESD Human Body Model (Driver Output) -15 15 kV MIL-STD-883 Method 3015.7 (1.5kΩ, 100pF) 16
ESD Human Body Model (Receiver Input) -15 15 kV MIL-STD-883 Method 3015.7 (1.5kΩ, 100pF) 16
ESD IEC61000-4-2 Air Discharge (Driver Output) -15 15 kV IEC61000-4-2 (330Ω, 150pF) 16
ESD IEC61000-4-2 Contact Discharge (Driver Output) -8 8 kV IEC61000-4-2 direct contact (330Ω, 150pF) 16
ESD IEC61000-4-2 Air Discharge (Receiver Input) -15 15 kV IEC61000-4-2 (330Ω, 150pF) 16
ESD IEC61000-4-2 Contact Discharge (Receiver Input) -8 8 kV IEC61000-4-2 direct contact (330Ω, 150pF) 16
Receiver Output Enable Time 200 ns Normal Operation 4
Receiver Output Disable Time 200 ns Normal Operation 4
Receiver Propagation Delay (tPHL and tPLH) tPHL, tPLH 0.15 µs Receiver input to Receiver output, CL = 150pF 4
Receiver Threshold to Driver Enabled tONLINE 100 µs Figure 13 3
Receiver Positive or Negative Threshold to STATUS HIGH tSTSH 0.5 µs Figure 13 3
Receiver Positive or Negative Threshold to STATUS LOW tSTSL 20 µs Figure 13 3
Input Hysteresis 0.3 V 3

CAD (KiCad official)

  • Symbol: SP3221EEY-L
  • Footprint: Package_SO:TSSOP-16_4.4x5mm_P0.65mm
  • 3D model: TSSOP-16 (KiCad packages3D, STEP)
  • 3D model files: sp3221eey-l-etched.step / sp3221eey-l-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); sp3221eey-l.step / sp3221eey-l.glb are the bare package body.

Provenance

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

  • Datasheet: MaxLinear datasheet (20 pp, sha256 182ec9acd2ab0c45, retrieved 2026-10-18, tier: lcsc)
  • 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