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PI4IOE5V9539LEX

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Diodes Incorporated I/O Expanders, TSSOP-24. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

componentcommunication interface chip-uart-485-232pi4ioe5v9539lexfactory-2.0.0extractor-text

Verified PI4IOE5V9539LEX

by Ray · last 30 Oct 2026 · 1 record · files match
SymbolFootprint3D modelPins

Verification log 1 record

30 Oct 2026RayPublished by the parts factory: tier mfr, 24 pinsfiles match
SymbolFootprint3D modelPinsfor all variants
  • ✓component-page-verify: PASS
  • ✓cad_props: Datasheet, MPN and distributor properties match page.json
  • ✓component: PI4IOE5V9539LEX · TSSOP-24 · 24 pins
  • ✓copper: 24 copper pads, none touching another net
  • ✓datasheet: all 24 pin names found in the 17-page datasheet
  • ✓distributor: lcsc C2669684, digikey 31-PI4IOE5V9539LEXTR-ND, mouser 729-PI4IOE5V9539LEX
  • ✓family: TSSOP-24_4.4x7.8mm_P0.65mm
  • ✓files: 7 declared files present
  • ✓hero: docs/hero.png 4000x2500
  • ✓lbr: OK: /tmp/cpv-g8kxd93c/x.lbr is a valid EAGLE .lbr with complete deviceset
  • ✓license: CC-BY-SA-4.0
  • ✓models_3d: 2 records
  • •package_fit (skip): no component.package_dims on the page: the model is unchecked against the datasheet drawing
  • ✓pads: 24 pins = 24 pads
  • ✓pose: 2 STEP(s) Z-up, seated, centred
  • ✓symbol: 24 pins agree
  • ✓visibility: public, source open
Evidencedatasheet
Verified files✓ pi4ioe5v9539lex.kicad_sym✓ pi4ioe5v9539lex.kicad_mod✓ pi4ioe5v9539lex.step
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PI4IOE5V9539LEX

Diodes Incorporated · I/O Expanders · TSSOP-24

PI4IOE5V9539LEX from Diodes Incorporated, in a TSSOP-24. 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 INT output Active-low open-drain interrupt output, activated when a port pin configured as an input changes state.
2 A1 input Address input 1, which together with A0 sets the fixed I2C-bus address (up to four devices on one bus).
3 RESET input Active-low reset input; driving it LOW resets the state machine and registers to defaults, with a minimum pulse width of 25 ns.
4 IO0_0 bidirectional Port 0 input/output 0, 5V tolerant (up to 5.5 V), configured as input at reset.
5 IO0_1 bidirectional Port 0 input/output 1, 5V tolerant (up to 5.5 V), configured as input at reset.
6 IO0_2 bidirectional Port 0 input/output 2, 5V tolerant (up to 5.5 V), configured as input at reset.
7 IO0_3 bidirectional Port 0 input/output 3, 5V tolerant (up to 5.5 V), configured as input at reset.
8 IO0_4 bidirectional Port 0 input/output 4, 5V tolerant (up to 5.5 V), configured as input at reset.
9 IO0_5 bidirectional Port 0 input/output 5, 5V tolerant (up to 5.5 V), configured as input at reset.
10 IO0_6 bidirectional Port 0 input/output 6, 5V tolerant (up to 5.5 V), configured as input at reset.
11 IO0_7 bidirectional Port 0 input/output 7, 5V tolerant (up to 5.5 V), configured as input at reset.
12 GND power_in Ground, 0 V reference.
13 IO1_0 bidirectional Port 1 input/output 0, 5V tolerant (up to 5.5 V), configured as input at reset.
14 IO1_1 bidirectional Port 1 input/output 1, 5V tolerant (up to 5.5 V), configured as input at reset.
15 IO1_2 bidirectional Port 1 input/output 2, 5V tolerant (up to 5.5 V), configured as input at reset.
16 IO1_3 bidirectional Port 1 input/output 3, 5V tolerant (up to 5.5 V), configured as input at reset.
17 IO1_4 bidirectional Port 1 input/output 4, 5V tolerant (up to 5.5 V), configured as input at reset.
18 IO1_5 bidirectional Port 1 input/output 5, 5V tolerant (up to 5.5 V), configured as input at reset.
19 IO1_6 bidirectional Port 1 input/output 6, 5V tolerant (up to 5.5 V), configured as input at reset.
20 IO1_7 bidirectional Port 1 input/output 7, 5V tolerant (up to 5.5 V), configured as input at reset.
21 A0 input Address input 0, which together with A1 sets the fixed I2C-bus address.
22 SCL input Serial clock line input, 0 to 400 kHz, with noise filter.
23 SDA bidirectional Serial data line, open-drain, with noise filter on the input.
24 VCC power_in Supply voltage, 2.3 V to 5.5 V.

Key specifications

Parameter Value
Manufacturer Diodes Incorporated
Package TSSOP-24
Category Communication Interface Chip/UART/485/232
Pins 24

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 2.3 5.5 V 3
Supply current ICC 135 200 μA Operating mode; VCC = 5.5 V; no load; fSCL= 100 kHz 3
Standby current (VI=GND) Istb 0.25 1 uA Standby mode; VCC = 5.5 V; no load; VI = GND; fSCL= 0 kHz; I/O = inputs 3
Standby current (VI=VCC) Istb 0.25 1 μA Standby mode; VCC = 5.5 V; no load; VI = VCC; fSCL= 0 kHz; I/O = inputs 3
Power-on reset voltage VPOR 1.16 1.41 V 3
SCL/SDA low level input voltage VIL -0.5 0.3 V max is +0.3VCC 3
SCL/SDA high level input voltage VIH 0.7 5.5 V min is 0.7VCC 3
SDA low level output current IOL 3 mA VOL=0.4V 3
SCL/SDA leakage current IL -1 1 μA VI=VCC=GND 3
SCL/SDA input capacitance Ci 6 10 pF VI =GND 3
I/O low level input voltage VIL -0.5 0.81 V 4
I/O high level input voltage VIH 1.8 5.5 V 4
I/O low level output current IOL 8 9 mA VCC = 2.3 V to 5.5 V; VOL = 0.5 V 4
I/O low level output current IOL 10 11 mA VCC= 2.3 V to 5.5 V; VOL = 0.7 V 4
High level output voltage VOH 1.8 V IOH=-8mA;VCC=2.3V 4
High level output voltage VOH 1.7 V IOH=-10mA;VCC=2.3V 4
High level output voltage VOH 2.6 V IOH=-8mA;VCC=3.0V 4
High level output voltage VOH 2.5 V IOH=-10mA;VCC=3.0V 4
High level output voltage VOH 4.1 V IOH=-8mA;VCC=4.75V 4
High level output voltage VOH 4 V IOH=-10mA;VCC=4.75V 4
High level input leakage current ILIH 1 μA VCC=5.5V; VI=VCC 4
Low level input leakage current ILIL -1 μA VCC=5.5V; VI=GND 4
I/O input capacitance Ci 3.7 10 pF 4
I/O output capacitance Co 3.7 10 pF 4
INT low level output current IOL 3 mA VOL=0.4V 4
A0,A1,RESET low level input voltage VIL -0.5 0.81 V 4
A0,A1,RESET high level input voltage VIH 1.8 5.5 V 4
A0,A1,RESET input leakage current IL -1 1 μA 4
SCL clock frequency (standard mode) fSCL 0 100 kHz Standard mode I2C 5
SCL clock frequency (fast mode) fSCL 0 400 kHz Fast mode I2C 5
Bus free time STOP to START (standard) tBUF 4.7 μs Standard mode I2C 5
Bus free time STOP to START (fast) tBUF 1.3 μs Fast mode I2C 5
Hold time repeated START (standard) tHD;STA 4 μs Standard mode I2C 5
Hold time repeated START (fast) tHD;STA 0.6 μs Fast mode I2C 5
Set-up time repeated START (standard) tSU;STA 4.7 μs Standard mode I2C 5
Set-up time repeated START (fast) tSU;STA 0.6 μs Fast mode I2C 5
Set-up time STOP (standard) tSU;STO 4 μs Standard mode I2C 5
Set-up time STOP (fast) tSU;STO 0.6 μs Fast mode I2C 5
Data valid acknowledge time (standard) tVD;ACK 3.45 μs Standard mode I2C 5
Data valid acknowledge time (fast) tVD;ACK 0.9 μs Fast mode I2C 5
Data hold time (standard) tHD;DAT 0 ns Standard mode I2C 5
Data hold time (fast) tHD;DAT 0 ns Fast mode I2C 5
Data valid time (standard) tVD;DAT 3.45 ns Standard mode I2C 5
Data valid time (fast) tVD;DAT 0.9 ns Fast mode I2C 5
Data set-up time (standard) tSU;DAT 250 ns Standard mode I2C 5
Data set-up time (fast) tSU;DAT 100 ns Fast mode I2C 5
LOW period of SCL (standard) tLOW 4.7 μs Standard mode I2C 5
LOW period of SCL (fast) tLOW 1.3 μs Fast mode I2C 5
HIGH period of SCL (standard) tHIGH 4 μs Standard mode I2C 5
HIGH period of SCL (fast) tHIGH 0.6 μs Fast mode I2C 5
Fall time SDA and SCL tf 300 ns Standard and fast mode I2C 5
Rise time SDA and SCL (standard) tr 1000 ns Standard mode I2C 5
Rise time SDA and SCL (fast) tr 300 ns Fast mode I2C 5
Spike pulse width suppressed by filter tSP 50 ns Standard and fast mode I2C 5
Data output valid time tv(Q) 200 ns measured from 0.7VCC on SCL to 50% I/O output 5
Data input set-up time tsu(D) 150 ns 5
Data input hold time th(D) 1 μs 5
Valid time on pin INT tv(INT) 4 μs 5
Reset time on pin INT trst(INT) 4 μs 5
Reset pulse width tw(rst) 25 ns 6
Reset recovery time tvrec(rst) 0 ns 6
Reset time trst 1 us 6
Power supply voltage -0.5 6 V 3
Voltage on an I/O pin -0.5 6 V GND-0.5V to +6.0V 3
Input current -20 20 mA 3
Output current on an I/O pin -50 50 mA 3
Supply current 160 mA 3
Ground supply current 200 mA 3
Total power dissipation 200 mW 3
Operation temperature -40 85 ℃ 3

CAD (KiCad official)

  • Symbol: PI4IOE5V9539LEX
  • Footprint: Package_SO:TSSOP-24_4.4x7.8mm_P0.65mm
  • 3D model: TSSOP-24 (KiCad packages3D, STEP)
  • 3D model files: pi4ioe5v9539lex-etched.step / pi4ioe5v9539lex-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); pi4ioe5v9539lex.step / pi4ioe5v9539lex.glb are the bare package body.

Provenance

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

  • Datasheet: Diodes Incorporated datasheet (17 pp, sha256 14b4073298db8e2b, retrieved 2026-10-30, tier: manufacturer)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-sonnet-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