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SP3221EEA-L

Public Made by Adom

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

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SP3221EEA-L

MaxLinear · RS232 ICs · SSOP-16

SP3221EEA-L from MaxLinear, in a SSOP-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: logic LOW for normal operation, logic HIGH disables the receiver output into a high-Z state.
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 (absolute maximum +7.0V).
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 (absolute maximum -7.0V).
8 R1IN input RS-232 receiver input, ±15V input range with internal 5kΩ pull-down to ground, 25V absolute maximum.
9 R1OUT output TTL/CMOS receiver output, high-Z when EN is HIGH.
10 STATUS output TTL/CMOS output indicating receiver signal activity.
11 T1IN input TTL/CMOS driver input; unused input should be connected to GND or VCC.
12 ONLINE input Apply logic HIGH to override AUTO ON-LINE circuitry and keep the driver active (SHUTDOWN must also be HIGH).
13 T1OUT output RS-232 driver output with ±5.0V minimum swing into 3kΩ, short-circuit protected to ground.
14 GND power_in Ground.
15 VCC power_in +3.0V to +5.5V supply voltage.
16 SHUTDOWN input Apply logic LOW to shut down drivers and charge pump, overriding all AUTO ON-LINE circuitry and ONLINE.

Key specifications

Parameter Value
Manufacturer MaxLinear
Package SSOP-16
Category Communication Interface Chip
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 LOW 0.8 V Vcc = 3.3V or 5.0V, TxIN, EN, SHUTDOWN, ONLINE 2
Input Logic Threshold HIGH 2 V Vcc = 3.3V or 5.0V, TxIN, EN, SHUTDOWN, ONLINE 2
Input Leakage Current -1 0.01 1 µA TxIN, EN, ONLINE, SHUTDOWN, TAMB = +25ºC, Vin = 0V to Vcc 2
Output Leakage Current (receiver) -10 0.05 10 µA Receiver disabled, Vout = 0V to Vcc 2
Output Voltage LOW 0.4 V IOUT = 1.6mA 2
Driver Output Voltage Swing -5 5.4 5 V Driver output loaded with 3kΩ to GND, TAMB = +25ºC 3
Driver Output Resistance 300 Ω Vcc = V+ = V- = 0V, Vout = +/-2V 3
Driver Output Short-Circuit Current -60 60 mA Vout = 0V 3
Driver Output Leakage Current -25 25 µA Vcc = 0V or 3.0V to 5.5V, Vout = +/-12V, Driver disabled 3
Receiver Input Voltage Range -15 15 V 3
Receiver Input Threshold LOW 0.6 1.2 V Vcc = 3.3V 3
Receiver Input Threshold LOW 0.8 1.5 V Vcc = 5.0V 3
Receiver Input Threshold HIGH 1.5 2.4 V Vcc = 3.3V 3
Receiver Input Threshold HIGH 1.8 2.4 V Vcc = 5.0V 3
Receiver Input Resistance 3 5 7 kΩ 3
STATUS Output Voltage LOW 0.4 V IOUT = 1.6mA 3
Data Rate 250 kbps RL = 3kΩ, CL = 1000pF 4
Driver Skew 350 800 ns /tPHL - tPLH/, RL = 3kΩ, CL = 1000pF 4
Receiver Skew 50 800 ns /tPHL - tPLH/, CL = 150pF 4
Transition-Region Slew Rate 6 30 V/µs Vcc = 3.3V, RL = 3kΩ, CL = 150pF to 1000pF, TAMB = 25°C, measurements taken from -3.0V to +3.0V or +3.0V to -3.0V 4
Receiver Input Hysteresis 0.3 V 3
Receiver Propagation Delay tPHL, tPLH 0.15 µs Receiver input to Receiver output, CL = 150pF 4
Receiver Output Enable Time 200 ns Normal Operation 4
Receiver Output Disable Time 200 ns Normal Operation 4
Supply Voltage VCC -0.3 6 V 2
V+ V+ -0.3 7 V NOTE 1 2
V- V- -7 0.3 V NOTE 1 2
V+ + /V-/ 13 V NOTE 1 2
ICC (DC VCC or GND current) ICC 100 mA 2
Input Voltage RxIN -25 25 V printed +25V 2
Output Voltage TxOUT -13.2 13.2 V printed +13.2V 2
Storage Temperature -65 150 °C 2
Receiver Threshold to Driver Enabled tONLINE 100 µs Figure 13 3
Receiver Threshold to STATUS HIGH tSTSH 0.5 µs Figure 13 3
Receiver Threshold to STATUS LOW tSTSL 20 µs Figure 13 3

CAD (KiCad official)

  • Symbol: SP3221EEA-L
  • Footprint: Package_SO:SSOP-16_5.3x6.2mm_P0.65mm
  • 3D model: SSOP-16 (KiCad packages3D, STEP)
  • 3D model files: sp3221eea-l-etched.step / sp3221eea-l-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); sp3221eea-l.step / sp3221eea-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 2026-10-27, tier: manufacturer)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-sonnet-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