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ISL3178EIUZ-T-TUDI

Public Made by Adom

by adom

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

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ISL3178EIUZ-T-TUDI

Tudi · RS-485 / RS-422 ICs · MSOP-8

ISL3178EIUZ-T-TUDI from Tudi, in a MSOP-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, driven high when A-B >= -50mV and low when A-B <= -200mV while /RE is low, and high-impedance when /RE is high.
2 /RE input Receiver output enable, active low; /RE high puts RO in high-impedance, and /RE high with DE low enters low-power shutdown.
3 DE input Driver output enable; high enables the driver outputs, low makes them high-impedance, and DE low with /RE high enters low-power shutdown.
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.
6 A bidirectional Non-inverting receiver input and non-inverting driver output, with bus-side voltage rated -7V to 13V.
7 B bidirectional Inverting receiver input and inverting driver output, with bus-side voltage rated -7V to 13V.
8 VCC power_in Power supply, operating 4.75V to 5.25V with absolute maximum of +7V.

Key specifications

Parameter Value
Manufacturer Tudi
Package MSOP-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 7 V 2
Control port voltage (/RE, DE, DI) /RE, DE, DI -0.3 V 2
Bus-side input voltage (A, B) A, B -7 13 V 2
Receiver output voltage RO -0.3 V 2
Storage temperature range -60 150 ℃ 2
Soldering temperature range 300 ℃ 2
Supply voltage range VCC 4.75 5.25 V 1
Operating temperature range -40 85 ℃ 2
Driver differential output voltage (no load) VOD1 5 V No load 3
Driver differential output voltage (RL = 50 Ω) VOD2 2 V Fig. 2, RL = 50 Ω 3
Change in magnitude of differential output voltage ΔVOD 0.2 V Fig. 2, RL = 27 Ω 3
Driver common-mode output voltage VOC 3 V Fig. 2, RL = 27 Ω 3
Change in magnitude of common-mode output voltage ΔVOC 0.2 V Fig. 2, RL = 27 Ω 3
High-level input voltage (DE, DI, /RE) VIH 2 V 3
Low-level input voltage (DE, DI, /RE) VIL 0.8 V 3
Logic input current (DE, DI, /RE) IIN1 -2 2 uA 3
Driver output short-circuit current, shorted to high IOSD1 35 250 mA Output shorted to 0 V to 12 V 3
Driver output short-circuit current, shorted to low IOSD2 -250 -35 mA Output shorted to -7 V to 0 V 3
Receiver input current (A, B) at VIN = 12 V IIN2 125 uA DE = 0 V, VCC = 0 or 5 V, VIN = 12 V 3
Receiver input current (A, B) at VIN = -7 V IIN2 -100 uA DE = 0 V, VCC = 0 or 5 V, VIN = -7 V 3
Positive input threshold voltage VIT+ -50 mV -7 V ≤ VCM ≤ 12 V 3
Negative input threshold voltage VIT- -200 mV -7 V ≤ VCM ≤ 12 V 3
Input hysteresis voltage Vhys 10 30 mV -7 V ≤ VCM ≤ 12 V 3
Low-level output voltage (RO) VOL 0.4 V IOUT = +4 mA, VID = -200 mV 3
Three-state input leakage current (receiver output) IOZR -1 1 uA 0.4 V < VO < 2.4 V 4
Receiver input resistance RIN 96 kΩ -7 V ≤ VCM ≤ 12 V 4
Receiver short-circuit current IOSR 7 95 mA 0 V ≤ VO ≤ VCC 4
Supply current (/RE = 0 V or VCC, DE = 0) ICC 180 500 uA /RE = 0 V or VCC, DE = 0 4
Supply current (/RE = VCC) ICC 170 400 uA /RE = VCC, DE = 4
Shutdown supply current ISHDN 0.5 10 uA DE = 0 V, /RE = VCC 4
Driver propagation delay, low to high tDPLH 1000 ns RDIFF = 54 Ω, CL1 = CL2 = 100 pF (Fig. 3, 4) 4
Driver propagation delay, high to low tDPHL 1000 ns RDIFF = 54 Ω, CL1 = CL2 = 100 pF (Fig. 3, 4) 4
Driver skew /tDPLH - tDPHL/ tSKEW1 -100 100 ns RDIFF = 54 Ω, CL1 = CL2 = 100 pF (Fig. 3, 4) 4
Driver rise/fall time tDR, tDF 200 500 700 ns RDIFF = 54 Ω, CL1 = CL2 = 100 pF (Fig. 3, 4) 4
Driver enable to output high tDZH 2500 ns CL = 100 pF, S1 closed (Fig. 5, 6) 4
Driver enable to output low tDZL 2500 ns CL = 100 pF, S2 closed (Fig. 5, 6) 4
Driver input low to disable tDLZ 100 ns CL = 15 pF, S2 closed (Fig. 5, 6) 4
Driver input high to disable tDHZ 100 ns CL = 15 pF, S1 closed (Fig. 5, 6) 4
Driver enable to output high, in shutdown tDZH(SHDN) 4500 ns CL = 15 pF, S2 closed (Fig. 5, 6) 4
Driver enable to output low, in shutdown tDZL(SHDN) 4500 ns CL = 15 pF, S1 closed (Fig. 5, 6) 4
Receiver propagation delay, low to high tRPLH 200 ns VID ≥ 2.0 V; rise and fall time VID ≤ 15 ns (Fig. 7, 8) 5
Receiver propagation delay, high to low tRPHL 200 ns Fig. 7, 8 5
Receiver skew /tRPLH - tRPHL/ tSKEW2 3 30 ns Fig. 7, 8 5
Receiver enable to output low tRZL 20 50 ns CL = 100 pF, S1 closed (Fig. 9, 10) 5
Receiver enable to output high tRZH 20 50 ns CL = 100 pF, S2 closed (Fig. 9, 10) 5
Receiver output low to disable tRLZ 20 50 ns CL = 100 pF, S1 closed (Fig. 9, 10) 5
Receiver output high to disable tRHZ 20 50 ns CL = 100 pF, S2 closed (Fig. 9, 10) 5
Receiver enable to output high, in shutdown tRZH(SHDN) 3500 ns CL = 100 pF, S2 closed (Fig. 9, 10) 5
Receiver enable to output low, in shutdown tRZL(SHDN) 3500 ns CL = 100 pF, S1 closed (Fig. 9, 10) 5
Time to enter shutdown tSHDN 50 200 600 ns /RE = 1, DE = 0 (see NOTE2) 5
Driver thermal shutdown threshold temperature 150 ℃ 3
Driver thermal shutdown hysteresis temperature 20 ℃ 3

CAD (KiCad official)

  • Symbol: ISL3178EIUZ-T-TUDI
  • Footprint: Package_SO:MSOP-8_3x3mm_P0.65mm
  • 3D model: MSOP-8 (KiCad packages3D, STEP)
  • 3D model files: isl3178eiuz-t-tudi-etched.step / isl3178eiuz-t-tudi-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); isl3178eiuz-t-tudi.step / isl3178eiuz-t-tudi.glb are the bare package body.

Provenance

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

  • Datasheet: Tudi datasheet (9 pp, sha256 ee46719ae50f0cf1, 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, primary claude-sonnet-5-5 (text+vision), consensus claude-opus-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