component
WS3079
Public Made by Adomby adom
GEC RS-485 / RS-422 ICs, SOP-14. 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
markdownWS3079
GEC · RS-485 / RS-422 ICs · SOP-14
WS3079 from GEC, in a SOP-14. 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 | H/F | input | Half/full-duplex select: tie H/F to VCC for half-duplex mode; tie to GND or leave open for full-duplex mode. |
| 2 | RO | output | Receiver output: with the receiver enabled, RO goes high when V(A)-V(B) > -50 mV and low when V(A)-V(B) < -200 mV, and the datasheet states it is high for open or shorted inputs. |
| 3 | RE | input | Receiver output enable, active low: RE low enables RO, and RE high disables the receiver; RE high with DE low puts the whole chip into shutdown. |
| 4 | DE | input | Driver output enable: DE high enables the driver, and DE low disables it and puts the driver outputs in high-impedance. |
| 5 | DI | input | Driver input: DI low forces the non-inverting output low and the inverting output high, and DI high forces the non-inverting output high and the inverting output low. |
| 6 | SRL | input | Slew-rate limit select: tie to GND for 16 Mbps, tie to VCC for 500 Kbps, and leave floating for 250 Kbps. |
| 7 | GND | power_in | Ground reference for the device. |
| 8 | TXP | input | Driver phase control: tie to GND or leave open for normal driver output polarity, and tie to VCC to reverse the driver output phase. |
| 9 | Y | bidirectional | Driver non-inverting output, which is also the receiver non-inverting input in half-duplex mode. |
| 10 | Z | bidirectional | Driver inverting output, which is also the receiver inverting input in half-duplex mode. |
| 11 | B | input | Receiver inverting input presenting a 1/8 unit load; in full-duplex mode it is not connected to the receiver. |
| 12 | A | input | Receiver non-inverting input presenting a 1/8 unit load; in full-duplex mode it is not connected to the receiver. |
| 13 | RXP | input | Receiver phase control: tie to GND or leave open for normal receiver input polarity, and tie to VCC to reverse the receiver input phase. |
| 14 | VCC | power_in | Positive supply (recommended 3 V to 5.25 V per Table 6); bypass VCC to GND with a 0.1 µF capacitor. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | GEC |
| Package | SOP-14 |
| Category | Interface |
| Pins | 14 |
Electrical characteristics
Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).
| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Differential driver output, RS-422 load | VOD2 | 2 | 伏 | 图 1,R=50Ω(RS-422) | 2 | ||
| Differential driver output, RS-485 load | VOD2 | 1.5 | 伏 | 图 1,R=27Ω(RS-485) | 2 | ||
| Differential output voltage change (note 1) | ∆VOD | 0.2 | 伏 | 图 1,R =50ΩorR=27Ω | 2 | ||
| Driver output common-mode voltage | VOC | 3 | 伏 | 图 1,R=50ΩorR=27Ω | 2 | ||
| Common-mode voltage change (note 1) | ∆VOC | 0.2 | 伏 | 图 1,R=50ΩorR=27Ω | 2 | ||
| Input high voltage | VIH1 | 2 | 伏 | DE, DI, RE ，TXP,RXP,H/F | 2 | ||
| Input low voltage | VIL1 | 0.8 | 伏 | DE, DI, RE ，TXP,RXP,H/F | 2 | ||
| Input current, DE/DI/RE | IIN1 | -1 | 1 | 微安 | DE, DI, RE (注 2) | 2 | |
| Input current, Y/Z/A/B, bus pins at high input voltage | IIN4 | 125 | 微安 | DE = GND, VCC=GND or 3.6V, VIN=12V | 2 | ||
| Input current, Y/Z/A/B, bus pins at negative input voltage | IIN4 | -100 | 微安 | DE = GND, VCC=GND or 3.6V, VIN=-7V | 2 | ||
| SRL input low voltage | SRL_L | 0.4 | 伏 | 2 | |||
| Driver output short-circuit current | IOD1 | -100 | 25 | 毫安 | -7V≤VOUT≤VCC | 2 | |
| Driver output short-circuit current | IOD1 | 25 | 100 | 毫安 | 0V≤VOUT≤12V | 2 | |
| Driver output short-circuit current | IOD1 | -25 | 25 | 毫安 | 0V≤VOUT≤VCC | 2 | |
| Receiver differential input threshold voltage | VTH | -200 | -50 | 毫伏 | -7V≤VCM≤+12V | 2 | |
| Receiver output low voltage | VOL | 0.4 | 伏 | IO=4mA,VID=-1V | 3 | ||
| Receiver output high-impedance leakage current | IOZR | -1 | 1 | 微安 | 0.4V≤VO≤2.4V | 3 | |
| Receiver output short-circuit current | IOSR | -95 | 95 | 毫安 | 0V≤VRO≤VCC | 3 | |
| Supply current, static, driver enabled | ICC | 0.8 | 1.5 | 毫安 | No load, RE =GND, DI=GND or VCC, DE=VCC | 3 | |
| Supply current, static, driver disabled | ICC | 0.8 | 1.5 | 毫安 | No load, RE =GND, DI=GND or VCC, DE=GND | 3 | |
| Shutdown current | ISHDN | 120 | 180 | 微安 | DE GND,RE Vcc | 3 | |
| ESD contact discharge, A and B pins (IEC 61000-4-2) | -12 | 12 | 千伏 | 接触放电模型, IEC 61000-4-2, A管脚,B管脚 | 3 | ||
| ESD human body model, A and B pins | -15 | 15 | 千伏 | 人体模型 (A管脚,B管脚) | 3 | ||
| ESD human body model, other pins | -4 | 4 | 千伏 | 人体模型 (其他管脚) | 3 | ||
| Maximum operating voltage | VCC | 7 | V | 10 | |||
| Logic pin voltage | -0.3 | 7 | V | DE，RE，DI，RO SRL，TXP，RXP，H/F | 10 | ||
| Bus pin voltage | -8 | 13 | ℃ | A，B，Y，Z | 10 | ||
| Storage temperature | TSTG | -65 | 150 | ℃ | 10 | ||
| Maximum junction temperature | TJ | 150 | ℃ | 10 | |||
| ESD-HBM rating | ESD-HBM | 2000 | V | 10 | |||
| Recommended operating supply voltage | VDD | 3 | 5.25 | V | 10 | ||
| Operating temperature | TA | -40 | 125 | ℃ | 10 | ||
| Driver propagation delay (SRL=VCC, 500 kbps) | tDPLH, tDPHL | 250 | 720 | 1000 | 纳秒 | 图 3 和 5, RDIFF=54 欧姆，CL=54pF | 4 |
| Driver rise/fall time (SRL=VCC, 500 kbps) | tDR, tDF | 400 | 700 | 1200 | 纳秒 | 图 3 和 5, RDIFF=54 欧姆，CL1=CL2=100pF | 4 |
| Receiver propagation delay (SRL=VCC, 500 kbps) | tRPLH, tRPHL | 125 | 250 | 纳秒 | 图7和9；/VID/≥2.0V；VID上升下降时间小于15纳秒 | 4 | |
| Chip shutdown time (SRL=VCC, 500 kbps) | tSHDN | 50 | 200 | 600 | 纳秒 | 注 3 | 4 |
| Driver enable to output high (SRL=VCC, 500 kbps) | tDZH | 2500 | 纳秒 | 图 4 和 6,CL=100pF,S2 关断 | 4 | ||
| Driver enable to output low (SRL=VCC, 500 kbps) | tDZL | 2500 | 纳秒 | 图 4 和 6,CL=100pF,S1 关断 | 4 | ||
| Driver output low to disable (SRL=VCC, 500 kbps) | tDLZ | 500 | 纳秒 | 图 4 和 6, CL=15pF,S1 关断 | 4 | ||
| Driver output high to disable (SRL=VCC, 500 kbps) | tDHZ | 500 | 纳秒 | 图 4 和 6, CL=15pF,S2 关断 | 4 | ||
| Receiver enable to output low (SRL=VCC, 500 kbps) | tRZL | 20 | 120 | 纳秒 | 图 2 和 8, CL= 100pF,S1 关断 | 4 | |
| Receiver enable to output high (SRL=VCC, 500 kbps) | tRZH | 20 | 120 | 纳秒 | 图 2 和 8, CL=100pF,S2 关断 | 4 | |
| Receiver output high to disable (SRL=VCC, 500 kbps) | tRZL | 20 | 120 | 纳秒 | 图 2 和 8, CL=100pF,S1 关断 | 4 | |
| Receiver output low to disable (SRL=VCC, 500 kbps) | tRHZ | 20 | 120 | 纳秒 | 图 2 和 8, CL=100pF,S2 关断 | 4 | |
| Driver propagation delay (SRL=GND, 16 Mbps) | tDPLH, tDPHL | 10 | 100 | 纳秒 | 图 3 和 5, RDIFF=54 欧姆，CL=54pF | 4 | |
| Driver rise/fall time (SRL=GND, 16 Mbps) | tDR, tDF | 20 | 50 | 纳秒 | 图 3 和 5, RDIFF=54 欧姆，CL1=CL2=100pF | 4 | |
| Receiver propagation delay (SRL=GND, 16 Mbps) | tRPLH, tRPHL | 120 | 200 | 纳秒 | 图7和9；/VID/≥2.0V；VID上升下降时间小于15纳秒 | 5 | |
| Chip shutdown time (SRL=GND, 16 Mbps) | tSHDN | 200 | 600 | 纳秒 | 注 4 | 5 | |
| Driver enable to output high (SRL=GND, 16 Mbps) | tDZH | 30 | 200 | 纳秒 | 图 4 和 6,CL=100pF,S2 关断 | 5 | |
| Driver enable to output low (SRL=GND, 16 Mbps) | tDZL | 30 | 200 | 纳秒 | 图 4 和 6,CL=100pF,S1 关断 | 5 | |
| Driver output low to disable (SRL=GND, 16 Mbps) | tDLZ | 30 | 200 | 纳秒 | 图 4 和 6, CL=15pF,S1 关断 | 5 | |
| Driver output high to disable (SRL=GND, 16 Mbps) | tDHZ | 30 | 200 | 纳秒 | 图 4 和 6, CL=15pF,S2 关断 | 5 | |
| Receiver enable to output low (SRL=GND, 16 Mbps) | tRZL | 20 | 50 | 纳秒 | 图 2 和 8, CL= 100pF,S1 关断 | 5 | |
| Receiver enable to output high (SRL=GND, 16 Mbps) | tRZH | 20 | 50 | 纳秒 | 图 2 和 8, CL=100pF,S2 关断 | 5 | |
| Receiver output high to disable (SRL=GND, 16 Mbps) | tRZL | 20 | 50 | 纳秒 | 图 2 和 8, CL=100pF,S1 关断 | 5 | |
| Receiver output low to disable (SRL=GND, 16 Mbps) | tRHZ | 20 | 50 | 纳秒 | 图 2 和 8, CL=100pF,S2 关断 | 5 | |
| Input hysteresis | VHYS | 100 | 毫伏 | DE, DI, RE ，TXP,RXP,H/F | 2 | ||
| Receiver differential threshold hysteresis | ∆VTH | 40 | 毫伏 | 2 | |||
| Receiver input resistance | RIN | 96 | 千欧姆 | -7V≤VCM≤+12V | 3 |
CAD (KiCad official)
- Symbol:
WS3079 - Footprint:
Package_SO:SOIC-14_3.9x8.7mm_P1.27mm - 3D model: SOP-14 (KiCad packages3D, STEP)
- 3D model files:
ws3079-etched.step/ws3079-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);ws3079.step/ws3079.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: GEC datasheet (13 pp, sha256
76a7848bfb6b0627, retrieved 2026-10-20, 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), consensusclaude-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).