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WS3221ECA
Public Made by Adomby adom
GEC RS232 ICs, SSOP-16. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownWS3221ECA
GEC · RS232 ICs · SSOP-16
WS3221ECA from GEC, 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 | 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, with C1P to C1N recommended at 0.1uF. |
| 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, with C1P to C1N recommended at 0.1uF. |
| 5 | C2+ | passive | Positive terminal of the inverting charge-pump capacitor, with C2P to C2N recommended at 0.1uF. |
| 6 | C2- | passive | Negative terminal of the inverting charge-pump capacitor, with C2P to C2N recommended at 0.1uF. |
| 7 | V- | power_out | Negative supply generated by the charge pump, stated as -5.4V. |
| 8 | R1IN | input | First RS-232 receiver input, rated at ±20V in the absolute maximum table. |
| 9 | R1OUT | output | First TTL/CMOS receiver output, referenced to VCC and rated from -0.3V to VCC+0.3V. |
| 10 | XIDLE | output | TTL/CMOS output that indicates the XPWRSAVE or shutdown state. |
| 11 | T1IN | input | First TTL/CMOS driver input, rated from -0.3V to +7V. |
| 12 | XPWRSAVE | input | A high level forces the driver to operate, and SHUTDOWN must be high for this function to apply. |
| 13 | T1OUT | output | First RS-232 driver output, rated at ±15V in the absolute maximum table. |
| 14 | GND | power_in | Ground reference for the device. |
| 15 | VCC | power_in | Supply voltage of +3V to +3.6V, with 3.3V typical. |
| 16 | XSD | input | Shutdown control, active low; a low level shuts down the driver and voltage converter. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | GEC |
| Package | SSOP-16 |
| Category | Communication Interface Chip/UART/485/232 |
| 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 |
|---|---|---|---|---|---|---|---|
| 温度 | -40 | 25 | 85 | ℃ | Commercial Grade | 2 | |
| 电源电压 | VCC | 3 | 3.3 | 3.6 | V | VCC = +3.3V | 2 |
| 工作电流 | 0.5 | 1 | mA | TTL Inputs = VCC/GND, RS-232 Input = float | 2 | ||
| XPWRSAVE 不使能时工作电流 | 0.5 | 1 | mA | XSD= VCC ,XPWRSAVE= VCC, TTL Inputs = VCC/GND, RS-232 Input = float, VCC = 3.3V | 2 | ||
| XPWRSAVE 使能时工作电流 | 1 | 10 | uA | XSD= VCC ,XPWRSAVE= GND, TTL Inputs = VCC/GND, RS-232 Input = float, VCC = 3.3V | 2 | ||
| SHUTDOWN 使能时电流 | 1 | 10 | uA | XSD= GND | 2 | ||
| 驱动器输入 输入阈值电压 Low | 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 | 2.4 | V | VCC = +3.3V Supply | 2 | |||
| 驱动器输入 输入阈值电压迟滞 | 0.5 | V | VCC = +3.3V Supply | 2 | |||
| 输入漏电流 | -1 | 0.1 | 1 | uA | 2 | ||
| 接收器输出 输出电压 Low | 0.4 | V | IOUT = 1.6mA | 2 | |||
| 输出漏电流 (接收器) | -10 | 0.1 | 10 | uA | Receiver Outputs Disabled, VOUT = VCC or GND | 2 | |
| 接收器输入 输入电压摆幅 | -20 | 20 | V | TA = 25°C, VCC = 3.3V Supply | 2 | ||
| 接收器输入 输入阈值电压 Low | 0.8 | V | 2 | ||||
| 接收器输入 输入阈值电压 High | 2.4 | V | 2 | ||||
| 接收器输入 输入阈值电压迟滞 | 0.5 | V | 2 | ||||
| 输入电阻 | 3 | 5 | 7 | KΩ | VIN = ±20V, TA = 25°C | 2 | |
| 驱动器输出 输出电压幅值 | -5 | 5 | V | RL = 3kΩ, All Outputs are loaded | 2 | ||
| 驱动器输出 输出电阻 | 300 | Ω | VCC = VP = VN = GND, VOUT = ±2V | 2 | |||
| 驱动器输出 输出短路电流 | -60 | 60 | mA | VOUT = GND | 2 | ||
| 驱动器输出 输出漏电流 | -5 | 5 | uA | Transmitter Disabled, VOUT = ±12V | 2 | ||
| 最大数据传输速率 | 250 | Kbps | RL = 3kΩ, CL = 1000pF, One Transmitter | 2 | |||
| 传输限摆率 | 6 | 30 | V/uS | RL = 3~7kΩ, CL= 150pF to 1000pF, One Transmitter Switching, TA = 25°C | 3 | ||
| 接收器输入延时 | 0.15 | uS | CL = 150pF | 3 | |||
| 接收器输出延时 | 0.15 | uS | 3 | ||||
| 接收器输入输出延时之差 | 50 | nS | 3 | ||||
| 接收器输入到 XIDLE 输出高 | 1 | uS | 3 | ||||
| 接收器输入到 XIDLE 输出低 | 30 | uS | 3 | ||||
| Power Save模式到驱动器使能 | 100 | uS | 3 | ||||
| ESD HBM | ESD HBM | -15 | 15 | KV | RS-232 Inputs and Outputs | 3 | |
| EN61000-4-2 Contact Discharge | -8 | 8 | KV | EN61000-4-2 Contact Discharge | 3 | ||
| EN61000-4-2 Air Gap Discharge | -15 | 15 | KV | EN61000-4-2 Air Gap Discharge | 3 | ||
| 最大工作电压 | VCC | 7 | V | 7 | |||
| 正电荷泵 | VP | -0.3 | 7 | V | 7 | ||
| 负电荷泵 | VN | -7 | 0.3 | V | 7 | ||
| 驱动器输入脚 | T1IN | -0.3 | 7 | V | 7 | ||
| 接收器输入脚 | R1IN | -20 | 20 | V | 7 | ||
| 驱动器输出脚 | T1OUT | -15 | 15 | V | 7 | ||
| 接收器输出脚 | R1OUT | -0.3 | V | 7 | |||
| 存储温度 | TSTG | -65 | 150 | ℃ | 7 | ||
| 最高结温 | TJ | 150 | ℃ | 7 | |||
| ESD-HBM | ESD-HBM | 2000 | V | 7 | |||
| 推荐工作电压 | VDD | 3 | 3.3 | 3.6 | V | 7 | |
| 工作温度 | TA | -40 | 85 | ℃ | 7 | ||
| 电荷泵电容 | C1P, C1N, C2P, C2N | 0.1 | 0.1 | 1 | uF | 2 |
CAD (KiCad official)
- Symbol:
WS3221ECA - Footprint:
Package_SO:SSOP-16_5.3x6.2mm_P0.65mm - 3D model: SSOP-16 (KiCad packages3D, STEP)
- 3D model files:
ws3221eca-etched.step/ws3221eca-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);ws3221eca.step/ws3221eca.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: GEC datasheet (11 pp, sha256
2b3edbd74b394d18, retrieved 2026-10-26, 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, primaryclaude-haiku-5-5(text), consensusoff(skipped (clean text read)), 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).