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SP3494EN-L

Public Made by Adom

by adom

MaxLinear RS-485 / RS-422 ICs, SOIC-8. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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Contents

README

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SP3494EN-L

MaxLinear · RS-485 / RS-422 ICs · SOIC-8

SP3494EN-L from MaxLinear, in a SOIC-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: goes HIGH when A−B is at or above +0.2V and LOW when A−B is at or below −0.2V, and is HIGH when the inputs are left open (fail-safe).
2 RE input Receiver output enable, active LOW: a logic LOW enables the receiver and a logic HIGH disables it, and RE high with DE low puts the device into shutdown (<10µA supply current).
3 DE input Driver output enable, active HIGH: a logic HIGH enables the driver outputs and a logic LOW forces them to high impedance (Z); input high threshold is 2.0V minimum and input low threshold is 0.8V maximum.
4 DI input Driver input: with DE high, a logic HIGH drives A high and B low, and a logic LOW drives A low and B high; input thresholds are 2.0V minimum (high) and 0.8V maximum (low).
5 GND power_in Ground connection.
6 A bidirectional Non-inverting driver output and receiver input; receiver common-mode input range is −7V to +12V and receiver input sensitivity is ±200mV.
7 B bidirectional Inverting driver output and receiver input; receiver common-mode input range is −7V to +12V and receiver input sensitivity is ±200mV.
8 VCC power_in Positive supply, 3.3V ±5%.

Key specifications

Parameter Value
Manufacturer MaxLinear
Package SOIC-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
Differential output voltage, with load R=50Ω (RS-422) 2 V R = 50Ω (RS-422); Figure 1 7
Differential output voltage, with load R=27Ω (RS-485) 1.5 V R = 27Ω (RS-485); Figure 1 7
Change in magnitude of driver differential output voltage for complementary states 0.2 V R = 27Ω or R = 50Ω; Figure 1 7
Driver common-mode output voltage 3 V R = 27Ω or R = 50Ω; Figure 1 7
Input high voltage 2 V Applies to DE, DI, RE 7
Input low voltage 0.8 V Applies to DE, DI, RE 7
Input current -10 10 uA Applies to DE, DI, RE 7
Driver short circuit current, output high -250 250 mA VOUT = HIGH -7V ≤ VO ≤ +12V; Figure 8 7
Driver short circuit current, output low -250 250 mA VOUT = LOW -7V ≤ VO ≤ +12V; Figure 8 7
Maximum data rate (driver) 2.5 Mbps RE = VCC, DE = VCC 7
Driver input to output, tPLH tPLH 20 45 75 ns Figures 2 & 9 7
Driver input to output, tPHL tPHL 20 45 75 ns Figures 2 & 9 7
Differential driver skew /tDO1 - tDO2/ 10 ns Figures 2 and 10 7
Driver rise or fall time 30 70 ns From 10% - 90%; Figures 3 and 10 7
Driver enable to output high 52 120 ns Figures 4 and 11 7
Driver enable to output low 60 120 ns Figures 5 and 11 7
Driver disable time from low 40 120 ns Figures 5 and 11 7
Driver disable time from high 60 120 ns Figures 4 and 11 7
Differential input threshold -0.2 0.2 V -7V ≤ VCM ≤ 12V 7
Output voltage LOW 0.4 V VID = -200mV, 2.5mA 7
Three-state (high impedance) output current -1 1 uA 0V ≤ VO ≤ VCC; RE = VCC 7
Input resistance 12 15 kΩ -7V ≤ VCM ≤ 12V 7
Input current (A, B), VIN = 12V 1 mA DE = 0V, VCC = 0V or 3.6V, VIN = 12V 7
Input current (A, B), VIN = -7V -0.8 mA DE = 0V, VCC = 0V or 3.6V, VIN = -7V 7
Short circuit current 7 60 mA 0V ≤ VCM ≤ VCC 7
Maximum data rate (receiver) 2.5 Mbps RE = 0V, DE = 0V 8
Receiver input to output, tPLH tPLH 40 70 100 ns Figures 6 and 12 8
Receiver input to output, tPHL tPHL 40 70 100 ns Figures 6 and 12 8
Differential receiver skew tRSKEW 10 ns tRSKEW = /tRPHL- tRPLH/, Figures 6 and 12 8
Receiver enable to output low 35 60 ns Figures 7 and 13, S1 closed, S2 open 8
Receiver enable to output high 35 60 ns Figures 7 and 13, S2 closed, S1 open 8
Receiver disable from low 35 60 ns Figures 7 and 13, S1 closed, S2 open 8
Receiver disable from high 35 60 ns Figures 7 and 13, S2 closed, S1 open 8
Time to shutdown 50 75 200 ns RE = 3.3V, DE = 0V 8
Driver enable from shutdown to output high 65 150 ns Figures 4 and 11 8
Driver enable from shutdown to output low 65 150 ns Figures 5 and 11 8
Receivers enabled from shutdown to output high 50 200 ns Figures 7 and 13, S2 closed, S1 open 8
Receivers enabled from shutdown to output low 50 200 ns Figures 7 and 13, S1 closed, S2 open 8
Supply current, no load (DE = VCC) 1000 2000 uA RE, DI = 0V or VCC; DE = VCC 8
Supply current, no load (DE = 0V) 800 1500 uA RE = 0V, DI = 0V or VCC, DE = 0V 8
Shutdown mode supply current 10 uA DE = 0V, RE = VCC 8
Supply voltage VCC VCC 6 V 6
Input voltage, drivers -0.3 6 V 6
Input voltage, receivers -14 14 V 6
Output voltage, drivers -14 14 V 6
Output voltage, receivers -0.3 6 V 6
Storage temperature -65 150 °C 6
Maximum junction temperature TJ 125 °C 6
Power dissipation, 8-pin NSOIC ѲJA 600 mW 8-pin NSOIC 6
Supply voltage tolerance VCC -5 5 % VCC = 3.3V ±5%; TAMB = TMIN to TMAX 7
Operating temperature range, EN-L grade TAMB -40 85 °C SP3494EN-L, per Ordering Information 13
Package thermal resistance, 8-pin NSOIC 128.4 °C/W 8-pin NSOIC 6
Input hysteresis 20 mV VCM = 0V 7

CAD (KiCad official)

  • Symbol: SP3494EN-L
  • Footprint: Package_SO:SOIC-8_3.9x4.9mm_P1.27mm
  • 3D model: SOIC-8 (KiCad packages3D, STEP)
  • 3D model files: sp3494en-l-etched.step / sp3494en-l-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); sp3494en-l.step / sp3494en-l.glb are the bare package body.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

  • Datasheet: MaxLinear datasheet (14 pp, sha256 ff9906c2e2d6d38d, retrieved 2026-10-17, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-haiku-5-5 (text), consensus claude-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).

Datasheet PDF