component
MAX485EPA
Public Made by Adomby adom
lingxingic RS-485 / RS-422 ICs, DIP-8. 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
markdownMAX485EPA
lingxingic · RS-485 / RS-422 ICs · DIP-8
MAX485EPA from lingxingic, in a DIP-8. 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 | R | output | Receiver output: driven high when VID ≥ VIT+ and low when VID ≤ VIT- with /RE low, and high-impedance when /RE is high. |
| 2 | /RE | input | Active-low receiver enable: the receiver is enabled when /RE is low, and R goes high-impedance when /RE is high. |
| 3 | DE | input | Driver enable: the driver is enabled when DE is high, and both A and B go high-impedance when DE is low. |
| 4 | D | input | Driver input: with DE high, a high on D drives A high and B low, and a low on D drives A low and B high; the recommended high-level input is 2 V to VCC and the low-level input is 0 V to 0.8 V. |
| 5 | GND | power_in | Ground reference for the device. |
| 6 | A | bidirectional | Non-inverting RS-485 bus terminal shared by the receiver non-inverting input and the driver non-inverting output; bus common-mode range is -7 V to 12 V. |
| 7 | B | bidirectional | Inverting RS-485 bus terminal shared by the receiver inverting input and the driver inverting output; bus common-mode range is -7 V to 12 V. |
| 8 | VCC | power_in | Supply pin; recommended supply range is 3 V to 5.5 V. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | lingxingic |
| Package | DIP-8 |
| Category | Interface |
| Pins | 8 |
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 | -0.3 | 7 | V | 5 | ||
| 输入电压 (input voltage, D, DE, /RE) | VI | -0.3 | V | 5 | |||
| 输入/输出电压 (input/output voltage, A, B) | VI/O | -15 | 15 | V | A, B pins | 5 | |
| 输入/输出电压 (input/output voltage, R) | VI/O | -0.3 | V | R pin | 5 | ||
| ESD HBM (bus pins A, B) | -15 | 15 | kV | HBM mode, bus pins A, B | 5 | ||
| ESD HBM (all other pins) | -15 | 15 | kV | HBM mode, all other pins | 5 | ||
| 电源电压 (supply voltage) | VCC | 3 | 5.5 | V | 5 | ||
| 共模电压 (common-mode voltage) | VCM | -7 | 12 | V | 5 | ||
| 高电平输入电压 (high-level input voltage) | VIH | 2 | V | driver input, driver enable and receiver enable | 5 | ||
| 低电平输入电压 (low-level input voltage) | VIL | 0 | 0.8 | V | 5 | ||
| 差分输入电压 (differential input voltage) | VID | -7 | 12 | V | 5 | ||
| 差分负载电阻 (differential load resistance) | RL | 54 | Ω | printed as >54 Ω | 5 | ||
| 工作温度 (operating temperature) | Tamb | -40 | 85 | ℃ | 5 | ||
| 贮存温度 (storage temperature) | Tstg | -65 | 150 | ℃ | 5 | ||
| 工作电压 (operating voltage) | VCC | 3 | 5.5 | V | 6 | ||
| 静态电流 (static supply current) | ICC | 1.9 | 2.35 | mA | DE=VCC, /RE=GND, no load | 6 | |
| 静态电流 (static supply current) | ICC | 0.47 | 0.6 | mA | DE=VCC, /RE=VCC, no load | 6 | |
| 静态电流 (static supply current) | ICC | 1.7 | 2.05 | mA | DE=GND, /RE=GND, no load | 6 | |
| 静态电流 (static supply current) | ICC | 0.001 | mA | DE=GND, /RE=VCC, no load | 6 | ||
| 差分输出电压幅度 (differential output voltage magnitude) | /VOD/ | 2.1 | 3.5 | V | RL=60Ω @VA&VB(-7～12V), VCC=4.5～5.5V, Fig 1A | 6 | |
| 差分输出电压幅度 (differential output voltage magnitude) | /VOD/ | 1.5 | 2.2 | V | RL=60Ω @VA&VB(-7～12V), VCC=3.0～3.6V | 6 | |
| 差分输出电压幅度 (differential output voltage magnitude) | /VOD/ | 2 | 3.6 | V | RL=54Ω, VCC=5V, Fig 1B | 6 | |
| 差分输出电压幅度 (differential output voltage magnitude) | /VOD/ | 1.5 | 1.9 | V | RL=54Ω, VCC=3V | 6 | |
| 差分输出电压幅度 (differential output voltage magnitude) | /VOD/ | 2.7 | 4 | V | RL=100Ω, VCC=5V | 6 | |
| 差分输出电压幅度 (differential output voltage magnitude) | /VOD/ | 2 | 2.3 | V | RL=100Ω, VCC=3V | 6 | |
| 差分输出电压幅度差值 (differential output voltage magnitude change) | ∆/VOD/ | -50 | 2 | 50 | mV | RL=54Ω, VCC=5V, CL=50pF | 6 |
| 稳态共模输出电压 (steady-state common-mode output voltage) | VOC(SS) | 1 | 3 | V | centre of two 27Ω load resistors | 6 | |
| 短路输出电流 (short-circuit output current) | /IOS/ | -250 | 110 | 250 | mA | VA/VB: -7～12V | 6 |
| 总线引脚 A, B 短路电流 (bus pins A, B short-circuit current) | 150 | mA | 6 | ||||
| 正向差分输入电压阈值 (positive differential input threshold) | VIT+ | -120 | -40 | mV | VA/VB: -7～12V | 6 | |
| 负向差分输入电压阈值 (negative differential input threshold) | VIT- | -220 | -170 | mV | VA/VB: -7～12V | 6 | |
| 输出高电平电压 (output high voltage) | VOH | 3 | 4.6 | V | IOH=-8mA | 6 | |
| 输出低电平电压 (output low voltage) | VOL | 0.4 | V | IOL=8mA | 6 | ||
| 高阻输出电流 (high-impedance output current) | IOZ | -1 | 1 | uA | VO=0/VCC, /RE=VCC | 6 | |
| 总线输入电流 (bus input current, driver disabled) | IIN | 120 | uA | VCC=4.5～5.5 or VCC=0, DE=0V; VI=12V | 6 | ||
| 总线输入电流 (bus input current, driver disabled) | IIN | -110 | uA | VCC=4.5～5.5 or VCC=0, DE=0V; VI=-7V | 6 | ||
| 总线输入阻抗 (bus input impedance) | RA/RB | 96 | KΩ | VA=-7V, VB=12V and VA=12V, VB=-7V | 6 | ||
| 逻辑输入高电压 (logic input high voltage) | VIH | 2 | V | DI, DE, /RE | 6 | ||
| 逻辑输入低电压 (logic input low voltage) | VIL | 0.8 | V | 6 | |||
| 输入漏电 (input leakage current) | Ii | -5 | 5 | uA | 6 | ||
| 最大数据速率 (maximum data rate) | fMAX | 10 | Mbps | VOD≥±1.5V, RL=54Ω, CL=100pF (Fig 2) | 7 | ||
| 关闭时间 (driver disable time, high) | tPHZ | 17 | 50 | ns | CL=15pF, SW2 closed, Fig 4 | 7 | |
| 关闭时间 (driver disable time, low) | tPLZ | 20 | 50 | ns | CL=15pF, SW1 closed | 7 | |
| 传输延迟 (driver propagation delay) | tPHL, tPLH | 15 | 30 | ns | 7 | ||
| 驱动器通道间偏斜 (driver pulse skew) | /tPHL- tPLH/ tSK(P) | 20 | ns | 7 | |||
| 启动时间 (driver enable time, high) | tPZH | 36 | 45 | ns | CL=100pF，RX 使能，SW2 闭合 | 7 | |
| 启动时间 (driver enable time, high, RX disabled) | tPZH | 2400 | 3200 | ns | CL=100pF，RX 禁用，SW2 闭合 | 7 | |
| 启动时间 (driver enable time, low) | tPZL | 21 | 45 | ns | CL=100pF，RX 使能，SW1 闭合 | 7 | |
| 启动时间 (driver enable time, low, RX disabled) | tPZL | 2400 | 3200 | ns | CL=100pF，RX 禁用，SW1 闭合 | 7 | |
| 关闭时间 (receiver disable time, high) | tPHZ | 30 | 60 | ns | SW2 closed, Fig 6 | 7 | |
| 关闭时间 (receiver disable time, low) | tPLZ | 27 | 60 | ns | SW1 closed | 7 | |
| 传播延迟时间 (receiver propagation delay) | tPHL, tPLH | 28 | 50 | ns | 7 | ||
| 接收器通道间偏斜 (receiver pulse skew) | /tPHL-tPLH/ tSK(P) | 15 | ns | 7 | |||
| 启动时间 (receiver enable time, high, TX disabled) | tPZH | 2500 | 3200 | ns | TX 禁用，SW2 闭合 | 7 | |
| 启动时间 (receiver enable time, low) | tPZL | 24 | 35 | ns | TX 使能，SW1 闭合 | 7 | |
| 启动时间 (receiver enable time, low, TX disabled) | tPZL | 2400 | 3200 | ns | TX 禁用，SW1 闭合 | 7 |
CAD (KiCad official)
- Symbol:
MAX485EPA - Footprint:
Package_DIP:DIP-8_W7.62mm - 3D model: DIP-8 (KiCad packages3D, STEP)
- 3D model files:
max485epa-etched.step/max485epa-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);max485epa.step/max485epa.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: lingxingic datasheet (13 pp, sha256
657088f4e3af8fd6, retrieved 2026-10-16, 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).