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MAX487ESA-JSM
Public Made by Adomby adom
JSMSEMI 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
markdownMAX487ESA-JSM
JSMSEMI · RS-485 / RS-422 ICs · SOP-8
MAX487ESA-JSM from JSMSEMI, 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 goes high when A - B >= 200 mV and goes low when A - B <= -200 mV. |
| 2 | /RE | input | Receiver enable control: the receiver is active when /RE is low and disabled when /RE is high. |
| 3 | DE | input | Driver enable control: the driver is active when DE is high and disabled when DE is low. |
| 4 | DI | input | Driver input: with DE high, DI low drives A low and B high, and DI high drives A high and B low. |
| 5 | GND | power_in | Ground reference pin. |
| 6 | A | bidirectional | Receiver non-inverting input and driver inverting output on the RS-485/RS-422 bus. |
| 7 | B | bidirectional | Receiver inverting input and driver inverting output on the RS-485/RS-422 bus. |
| 8 | VCC | power_in | Supply pin, normally connected to a 5 V supply; absolute maximum supply voltage is -0.3 V to 8.0 V. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | JSMSEMI |
| 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 | Vcc | -0.3 | 8 | V | 2 | ||
| Control input voltage /RE, DE | -0.3 | V | 2 | ||||
| Receiver output voltage RO | -0.3 | V | 2 | ||||
| Driver input voltage DI | -0.3 | V | 2 | ||||
| Operating temperature TOP | TOP | -40 | 85 | oC | 2 | ||
| Storage temperature TSTO | TSTO | -65 | 150 | oC | 2 | ||
| Control input high voltage /RE, DE, DI | 2 | V | 2 | ||||
| Control input low voltage /RE, DE, DI | 0.8 | V | 2 | ||||
| Receiver input voltage A, B | -7 | 12 | V | 2 | |||
| Operating temperature | -40 | 85 | oC | 2 | |||
| Differential driver output (RL=27) | VOD2 | 1.5 | V | Fig.1, RL= 27 | 3 | ||
| Change in magnitude of differential output | VOD | 0.2 | V | Fig.1, RL= 27 | 3 | ||
| Driver common-mode output voltage | VOC | 3 | V | Fig.1, RL= 27 | 3 | ||
| Input signal high level | VIH | 2 | V | DE, DI, REB | 3 | ||
| Input signal low level | VIL | 0.8 | V | DE, DI, REB | 3 | ||
| Control pin input current | IIN1 | -2 | 2 | μA | DE, DI, REB | 3 | |
| A/B pin input current | IIN2 | 1 | mA | DE=0, Vcc=0V or 5.25V; VIN=12V | 3 | ||
| A/B pin input current | IIN2 | -0.8 | mA | DE=0, Vcc=0V or 5.25V; VIN=-7V | 3 | ||
| Output short-circuit current | IOSD | -250 | 250 | mA | -7V VOUT 12V | 3 | |
| Receiver differential threshold voltage | VTH | -200 | 200 | mV | 3 | ||
| Receiver output low voltage | VOL | 0.4 | V | Io= 4mA, VID= -200mV | 3 | ||
| Receiver input resistance | RIN | 32 | k | -7V VCM +12V | 3 | ||
| Receiver short-circuit current | IOSR | 7 | 95 | mA | Fig. 6, 0V VRO Vcc | 3 | |
| Supply current (DE=Vcc) | Icc | 500 | 900 | μA | No load, /RE= GND, DI= Vcc or GND. DE= Vcc | 3 | |
| Supply current (DE=GND) | Icc | 300 | 500 | μA | No load, /RE= GND, DI= Vcc or GND. DE= GND | 3 | |
| Driver rise or fall time | tDF, tDR | 10 | 30 | 60 | ns | Fig.5 and 7, RDIFF=54, CL1=CL2= 100pF | 4 |
| Data rate | fData | 250 | Kbps | 4 | |||
| Driver enable to output low | tDZL | 70 | ns | CDL= 100pF, S1 关闭 | 4 | ||
| Driver enable to output high | tDZH | 70 | ns | CDL= 100pF, S2 关闭 | 4 | ||
| Driver low to disable | tDLZ | 70 | ns | CDL= 15pF, S1 关闭 | 4 | ||
| Driver high to disable | tDHZ | 70 | ns | CDL= 15pF, S2 关闭 | 4 | ||
| Receiver input to output propagation delay | tRPLH, tRPHL | 120 | 200 | ns | VID 2.0V; VID 15ns rise and fall time | 4 | |
| Receiver enable to output low | tRZL | 20 | 50 | ns | CRL= 15pF, S1 关闭 | 4 | |
| Receiver enable to output high | tRZH | 20 | 50 | ns | CRL= 15pF, S2 关闭 | 4 | |
| Receiver low to disable | tRLZ | 20 | 50 | ns | CRL= 15pF, S1 关闭 | 4 | |
| Receiver high to disable | tRHZ | 20 | 50 | ns | CRL= 15pF, S2 关闭 | 4 |
CAD (KiCad official)
- Symbol:
MAX487ESA-JSM - Footprint:
Package_SO:SOIC-8_3.9x4.9mm_P1.27mm - 3D model: SOP-8 (KiCad packages3D, STEP)
- 3D model files:
max487esa-jsm-etched.step/max487esa-jsm-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);max487esa-jsm.step/max487esa-jsm.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: JSMSEMI datasheet (12 pp, sha256
909b1032f31deb7c, 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).