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HG487EIM
Public Made by Adomby adom
HGSEMI RS-485 / RS-422 ICs, SOP-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
markdownHG487EIM
HGSEMI · RS-485 / RS-422 ICs · SOP-8
HG487EIM from HGSEMI, in a SOP-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 | RO | output | Receiver output: with RE low, RO is high when A-B is at least +200 mV and low when A-B is at most -200 mV. |
| 2 | RE | input | Receiver output enable, active low: RO is enabled when RE is low and high-impedance when RE is high; RE high with DE low puts the device into low-power shutdown, and RE uses a hot-plug input structure. |
| 3 | DE | input | Driver output enable: the driver outputs are active when DE is high and high-impedance when DE is low; DE low with RE high puts the device into low-power shutdown, and DE uses a hot-plug input structure. |
| 4 | DI | input | Driver input: with DE high, a low on DI drives A/Y low and B/Z high, and a high on DI drives A/Y high and B/Z low. |
| 5 | GND | power_in | Ground. |
| 6 | A | bidirectional | Bus pin A (A/Y): non-inverting driver output and non-inverting bus terminal, as printed in the datasheet pin table as 'receiver non-inverting output and driver non-inverting output'. |
| 7 | B | bidirectional | Bus pin B (B/Z): receiver inverting input and driver inverting output. |
| 8 | VCC | power_in | Positive supply: 4.5 V ≤ VCC ≤ 5.5 V; connect a 0.1 µF capacitor to ground. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | HGSEMI |
| Package | SOP-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 |
|---|---|---|---|---|---|---|---|
| Supply voltage (driver, DC characteristics) | VCC | 4.5 | 5.5 | V | 5 | ||
| Supply voltage (absolute maximum) | VCC | 6 | V | 4 | |||
| Control input voltage (RE, DE) | RE, DE | -0.3 | 6 | V | 4 | ||
| Driver input voltage (DI) | DI | -0.3 | 6 | V | 4 | ||
| Driver output voltage (A, B, Y, Z) | -7 | 12 | V | 4 | |||
| Receiver input voltage (A, B) | -7 | 12 | V | 4 | |||
| Receiver output voltage (RO) | RO | -0.3 | V | Printed as (VCC+0.3) V | 4 | ||
| Continuous power dissipation (8SOP) | 500 | mW | TA=+70 C, 8SOP | 4 | |||
| Operating temperature range (HG48_I) | -40 | 85 | C | HG48_I industrial grade | 4 | ||
| Storage temperature | -65 | 150 | C | 4 | |||
| Differential driver output (RS-422 load) | VOD | 2.7 | V | Fig.1, RL=100 ohm (RS-422); max printed as VCC | 5 | ||
| Differential driver output (RS-485 load) | VOD | 2.1 | V | Fig.1, RL=54 ohm (RS-485); max printed as VCC | 5 | ||
| Differential driver output voltage magnitude change | ΔVOD | 0.2 | V | Fig.1, RL=100 ohm or RL=54 ohm | 5 | ||
| Driver common-mode output voltage | VOC | 3 | V | Fig.1, RL=100 ohm or RL=54 ohm; min printed as VCC/2 | 5 | ||
| Common-mode output voltage magnitude change | ΔVOC | 0.2 | V | Fig.1, RL=100 ohm or RL=54 ohm | 5 | ||
| Input high voltage | VIH | 2 | V | DE, DI, RE | 5 | ||
| Input low voltage | VIL | 0.8 | V | DE, DI | 5 | ||
| Input current (DE, DI, RE) | IIN | -1 | 1 | uA | DE, DI, RE | 5 | |
| Input current (A, B) full duplex | IA, IB | 125 | uA | DE=GND, VCC=GND or VCC, VIN=12V | 5 | ||
| Input current (A, B) full duplex | IA, IB | -75 | uA | DE=GND, VCC=GND or VCC, VIN=-7V | 5 | ||
| Output leakage current (Y, Z) full duplex | IO | 125 | uA | DE=GND, VCC=GND or VCC, VIN=12V | 5 | ||
| Output leakage current (Y, Z) full duplex | IO | -100 | uA | DE=GND, VCC=GND or VCC, VIN=-7V | 5 | ||
| Driver short-circuit output current | IOSD | 250 | mA | 0<=VOUT<=12V | 5 | ||
| Driver short-circuit output current | IOSD | -250 | mA | -7<=VOUT<=VCC | 5 | ||
| Driver short-circuit foldback output current | IOSDF | 20 | mA | VCC-1V<=VOUT<=VCC+0.5V | 5 | ||
| Driver short-circuit foldback output current | IOSDF | -20 | mA | -0.5V<=VOUT<=+1V | 5 | ||
| Receiver differential threshold voltage | VTH | -200 | 200 | mV | -7V<=VCM<=12V | 5 | |
| Receiver output low voltage | VOL | 0.4 | V | IO=4mA, VID=-200mV | 5 | ||
| Receiver tri-state output current | IOZR | -1 | 1 | uA | 0<=VO<=VCC | 5 | |
| Receiver output short-circuit current | IOSR | -7 | 95 | mA | 0V<=VRO<=VCC; printed as ±7 and ±95 | 5 | |
| Supply current (RE=VCC, DE=VCC) | Icc | 530 | 900 | uA | No load, RE=VCC, DI=GND or VCC, DE=VCC | 6 | |
| Supply current (RE=VCC, DE=GND) | Icc | 475 | 600 | uA | No load, RE=VCC, DI=GND or VCC, DE=GND | 6 | |
| Supply current (RE=GND, DE=VCC) | Icc | 530 | 1000 | uA | No load, RE=GND, DI=GND or VCC, DE=VCC | 6 | |
| Supply current (RE=GND, DE=GND) | Icc | 475 | 800 | uA | No load, RE=GND, DI=GND or VCC, DE=GND | 6 | |
| Standby mode supply current | ISHDN | 0.05 | 10 | uA | DE=GND, RE=VCC | 6 | |
| ESD IEC61000-4-2 air-gap discharge (A, B, Y, Z) | -16 | 16 | kV | A, B, Y, Z pins; printed as ±16 kV | 6 | ||
| ESD IEC61000-4-2 contact discharge (A, B, Y, Z) | -8 | 8 | kV | A, B, Y, Z pins; printed as ±8 kV | 6 | ||
| ESD HBM (all pins) | -4 | 4 | kV | HBM model, all pins; printed as ±4 kV | 6 | ||
| Driver propagation delay (rise and fall) | tDPLH, tDPHL | 200 | 1000 | ns | Fig.2 and 5, RL=54 ohm, CL=50pF | 8 | |
| Driver output skew | tDSKEW | -140 | 140 | ns | Fig.2 and 5, RL=54 ohm, CL=50pF; printed as ±140 | 8 | |
| Driver rise and fall time | tDR, tDF | 250 | 900 | ns | Fig.2 and 5, RL=54 ohm, CL=50pF | 8 | |
| Driver enable to output high | tDZH | 2500 | ns | Fig.3 and 6, CL=100pF, S3 closed | 8 | ||
| Driver enable to output low | tDZL | 2500 | ns | Fig.3 and 6, CL=100pF, S2 closed | 8 | ||
| Driver output low to disable time | tDLZ | 100 | ns | Fig.3 and 6, CL=15pF, S2 closed | 8 | ||
| Driver output high to disable time | tDHZ | 100 | ns | Fig.3 and 6, CL=15pF, S3 closed | 8 | ||
| Driver enable from standby to output high | tDZH(SHDN) | 5500 | ns | Fig.3 and 6, CL=15pF, S3 closed | 8 | ||
| Driver enable from standby to output low | tDZL(SHDN) | 5500 | ns | Fig.3 and 6, CL=15pF, S2 closed | 8 | ||
| Standby time (driver) | tSHDN | 50 | 700 | ns | 8 | ||
| Receiver propagation delay | tRPLH, tRPHL | 200 | ns | Fig.7 and 8, CL=15pF, /VID/>=2.0V, VID<=15ns | 8 | ||
| Receiver output skew | tRSKEW | -30 | 30 | ns | Fig.7 and 8, CL=15pF, /VID/>=2.0V, VID<=15ns; printed as ±30 | 8 | |
| Receiver enable to output low | tRZL | 50 | ns | Fig.4 and 9, S1=-1.5V, S2 to VCC | 8 | ||
| Receiver enable to output high | tRZH | 50 | ns | Fig.4 and 9, S1=+1.5V, S2 to GND | 8 | ||
| Receiver output low to disable time | tRLZ | 50 | ns | Fig.4 and 9, S1=-1.5V, S2 to VCC | 8 | ||
| Receiver output high to disable time | tRHZ | 50 | ns | Fig.4 and 9, S1=+1.5V, S2 to GND | 8 | ||
| Receiver enable from standby to output high | tRZH(SHDN) | 5500 | ns | Fig.4 and 9, S1=-1.5V, S2 to VCC | 8 | ||
| Receiver enable from standby to output low | tRZL(SHDN) | 5500 | ns | Fig.4 and 9, S1=+1.5V, S2 to GND | 8 | ||
| Maximum data rate (driver, 500 kbps variant) | fMAX | 500 | kbps | 8 |
CAD (KiCad official)
- Symbol:
HG487EIM - Footprint:
Package_SO:SOIC-8_3.9x4.9mm_P1.27mm - 3D model: SOP-8 (KiCad packages3D, STEP)
- 3D model files:
hg487eim-etched.step/hg487eim-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);hg487eim.step/hg487eim.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: HGSEMI datasheet (24 pp, sha256
875b683720653634, 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, 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).