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WS3222ECY

Public Made by Adom

by adom

GEC RS232 ICs, TSSOP-20. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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WS3222ECY

GEC · RS232 ICs · TSSOP-20

WS3222ECY from GEC, in a TSSOP-20. 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 XEN input Receiver enable, active low; a high level forces the receiver outputs into high impedance.
2 C1+ passive Positive terminal of the boost charge-pump capacitor.
3 V+ power_out Positive supply generated by the charge pump, stated as +5.4V.
4 C1- passive Negative terminal of the boost 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 Negative supply generated by the charge pump, stated as -5.4V.
8 T2OUT output Second RS-232 driver output.
9 R2IN input Second RS-232 receiver input.
10 R2OUT output Second TTL/CMOS receiver output.
11 NC unconnected Not connected.
12 T2IN input Second TTL/CMOS driver input.
13 T1IN input First TTL/CMOS driver input.
14 NC unconnected Not connected.
15 R1OUT output First TTL/CMOS receiver output.
16 R1IN input First RS-232 receiver input.
17 T1OUT output First RS-232 driver output.
18 GND power_in Ground.
19 VCC power_in Supply voltage, +3V to +3.6V.
20 XSD input Shutdown control, active low; a low level shuts down the drivers and voltage converter.

Key specifications

Parameter Value
Manufacturer GEC
Package TSSOP-20
Category Interface
Pins 20

Electrical characteristics

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

Parameter Symbol Min Typ Max Unit Conditions Page
电源电压 (supply voltage) VCC 3 3.3 3.6 V VCC = +3.3V 2
温度 (operating temperature range) -40 25 85 ℃ -40°C to +85°C Commercial Grade 2
电荷泵电容 (charge pump capacitor) C1P, C1N, C2P, C2N 0.1 0.1 1 uF 2
工作电流 (operating current) 0.5 1 mA TTL Inputs = VCC/GND, RS-232 Input = float, 2
SHUTDOWN 使能时电流 (shutdown current) 1 10 uA XSD = GND 2
驱动器输入 输入阈值电压 Low (driver input low threshold) 0.8 V VCC = +3.3V Supply, VIN = VCC and GND, TIN 2
驱动器输入 输入阈值电压 High (driver input high threshold) 2.4 V 2
驱动器输入 输入阈值电压迟滞 (driver input hysteresis) 0.5 V 2
驱动器输入 输入漏电流 (driver input leakage) -1 0.1 1 uA 2
接收器输出 输出电压 Low (receiver output low) 0.4 V IOUT = 1.6mA 2
接收器输出 输出漏电流 (receiver output leakage) -10 0.1 10 uA Receiver Outputs Disabled, VOUT = VCC or GND, 2
接收器输入 输入电压摆幅 (receiver input voltage range) -20 20 V TA = 25°C, VCC = 3.3V Supply 2
接收器输入 输入阈值电压 Low (receiver input low threshold) 0.8 V 2
接收器输入 输入阈值电压 High (receiver input high threshold) 2.4 V 2
接收器输入 输入阈值电压迟滞 (receiver input hysteresis) 0.5 V 2
接收器输入 输入电阻 (receiver input resistance) 3 5 7 KΩ VIN = ±20V, TA = 25°C 2
驱动器输出 输出电压幅值 (driver output voltage swing) -5 5 V RL = 3kΩ, All Outputs are loaded 2
驱动器输出 输出电阻 (driver output resistance) 300 Ω VCC = VP = VN = GND, VOUT = ±2V 2
驱动器输出 输出短路电流 (driver short-circuit current) -60 60 mA VOUT = GND 2
驱动器输出 输出漏电流 (driver output leakage) -5 5 uA Transmitter Disabled, VOUT = ±12V 2
最大数据传输速率 (maximum data rate) 250 Kbps RL = 3kΩ, CL = 1000pF, One Transmitter Switching, TA = 25°C 2
传输限摆率 (driver transition slew rate) 6 30 V/uS RL = 3~7kΩ, CL = 150pF to 1000pF, One Transmitter Switching, TA = 25°C, measured from 3V to -3V or -3V to 3V 2
接收器输入延时 (receiver input propagation delay) 0.15 uS CL = 150pF 3
接收器输出延时 (receiver output propagation delay) 0.15 uS 3
接收器输入输出延时之差 (receiver propagation delay difference) 50 nS 3
接收器输出高到关断时间 (receiver output high to shutdown time) 0.2 uS 3
ESD HBM (RS-232 inputs and outputs) -15 15 KV RS-232 Inputs and Outputs 3
ESD EN61000-4-2 contact discharge -8 8 KV EN61000-4-2 Contact Discharge 3
ESD EN61000-4-2 air gap discharge -15 15 KV EN61000-4-2 Air Gap Discharge 3
最大工作电压 (maximum operating voltage) VCC 7 V 8
正电荷泵 (positive charge pump) VP -0.3 7 V 8
负电荷泵 (negative charge pump) VN -7 0.3 V 8
驱动器输入脚 (driver input pins) T1IN, T2IN -0.3 7 V 8
接收器输入脚 (receiver input pins) R1IN, R2IN -20 20 V 8
驱动器输出脚 (driver output pins) T1OUT, T2OUT -15 15 V 8
存储温度 (storage temperature) TSTG -65 150 ℃ 8
最高结温 (maximum junction temperature) TJ 150 ℃ 8
ESD-HBM ESD-HBM 2000 V 8
推荐工作电压 (recommended operating voltage) VDD 3 3.3 3.6 V 8
工作温度 (operating temperature) TA -40 85 ℃ 8

CAD (KiCad official)

  • Symbol: WS3222ECY
  • Footprint: Package_SO:TSSOP-20_4.4x6.5mm_P0.65mm
  • 3D model: TSSOP-20 (KiCad packages3D, STEP)
  • 3D model files: ws3222ecy-etched.step / ws3222ecy-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); ws3222ecy.step / ws3222ecy.glb are the bare package body.

Provenance

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

  • Datasheet: GEC datasheet (12 pp, sha256 2e9aa54666902cb8, retrieved 2026-10-18, tier: lcsc)
  • Datasheet language: Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
  • 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