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PI4IOE5V9539ZDEX
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Diodes Incorporated I/O Expanders, TQFN-24-EP(4x4). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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Symbol & Footprint
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README
markdownPI4IOE5V9539ZDEX
Diodes Incorporated · I/O Expanders · TQFN-24-EP(4x4)
PI4IOE5V9539ZDEX from Diodes Incorporated, in a TQFN-24-EP(4x4). 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 | IO0_0 | bidirectional | Port 0 bit 0 general-purpose I/O, configured as input or output through Configuration port 0 (reset default is input); each I/O must be externally limited to 25 mA. |
| 2 | IO0_1 | bidirectional | Port 0 bit 1 general-purpose I/O, configured as input or output through Configuration port 0 (reset default is input); each I/O must be externally limited to 25 mA. |
| 3 | IO0_2 | bidirectional | Port 0 bit 2 general-purpose I/O, configured as input or output through Configuration port 0 (reset default is input); each I/O must be externally limited to 25 mA. |
| 4 | IO0_3 | bidirectional | Port 0 bit 3 general-purpose I/O, configured as input or output through Configuration port 0 (reset default is input); each I/O must be externally limited to 25 mA. |
| 5 | IO0_4 | bidirectional | Port 0 bit 4 general-purpose I/O, configured as input or output through Configuration port 0 (reset default is input); each I/O must be externally limited to 25 mA. |
| 6 | IO0_5 | bidirectional | Port 0 bit 5 general-purpose I/O, configured as input or output through Configuration port 0 (reset default is input); each I/O must be externally limited to 25 mA. |
| 7 | IO0_6 | bidirectional | Port 0 bit 6 general-purpose I/O, configured as input or output through Configuration port 0 (reset default is input); each I/O must be externally limited to 25 mA. |
| 8 | IO0_7 | bidirectional | Port 0 bit 7 general-purpose I/O, configured as input or output through Configuration port 0 (reset default is input); each I/O must be externally limited to 25 mA. |
| 9 | GND | power_in | Ground reference for the device. |
| 10 | IO1_0 | bidirectional | Port 1 bit 0 general-purpose I/O, configured as input or output through Configuration port 1 (reset default is input); each I/O must be externally limited to 25 mA. |
| 11 | IO1_1 | bidirectional | Port 1 bit 1 general-purpose I/O, configured as input or output through Configuration port 1 (reset default is input); each I/O must be externally limited to 25 mA. |
| 12 | IO1_2 | bidirectional | Port 1 bit 2 general-purpose I/O, configured as input or output through Configuration port 1 (reset default is input); each I/O must be externally limited to 25 mA. |
| 13 | IO1_3 | bidirectional | Port 1 bit 3 general-purpose I/O, configured as input or output through Configuration port 1 (reset default is input); each I/O must be externally limited to 25 mA. |
| 14 | IO1_4 | bidirectional | Port 1 bit 4 general-purpose I/O, configured as input or output through Configuration port 1 (reset default is input); each I/O must be externally limited to 25 mA. |
| 15 | IO1_5 | bidirectional | Port 1 bit 5 general-purpose I/O, configured as input or output through Configuration port 1 (reset default is input); each I/O must be externally limited to 25 mA. |
| 16 | IO1_6 | bidirectional | Port 1 bit 6 general-purpose I/O, configured as input or output through Configuration port 1 (reset default is input); each I/O must be externally limited to 25 mA. |
| 17 | IO1_7 | bidirectional | Port 1 bit 7 general-purpose I/O, configured as input or output through Configuration port 1 (reset default is input); each I/O must be externally limited to 25 mA. |
| 18 | A0 | input | Address input 0 that sets the device I2C address bit; VIL max 0.81 V and VIH min 1.8 V, with inputs tolerant up to 5.5 V. |
| 19 | SCL | input | I2C-bus serial clock line input, supporting 0 to 400 kHz with a noise filter on the input. |
| 20 | SDA | bidirectional | I2C-bus serial data line, open-drain, with a noise filter on the input. |
| 21 | VCC | power_in | Supply voltage, 2.3 V to 5.5 V. |
| 22 | INT | output | Active LOW open-drain interrupt output that signals when an input state has changed; IOL minimum 3 mA at VOL 0.4 V. |
| 23 | A1 | input | Address input 1 that sets the device I2C address bit; VIL max 0.81 V and VIH min 1.8 V, with inputs tolerant up to 5.5 V. |
| 24 | RESET | input | Active LOW reset input; holding it LOW for at least tw(rst) 25 ns resets the state machine and registers to default, with VIL max 0.81 V and VIH min 1.8 V. |
| 25 | EP | passive | Exposed pad (from the footprint; not named in the datasheet pin table). |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Diodes Incorporated |
| Package | TQFN-24-EP(4x4) |
| Category | Interface |
| Pins | 25 |
Electrical characteristics
Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).
| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Power supply | -0.5 | 6 | V | 3 | |||
| Voltage on an I/O pin | -0.5 | 6 | V | referenced to GND | 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 | |||
| Storage temperature | -65 | 150 | ℃ | 3 | |||
| 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 | Istb | 0.25 | 1 | uA | Standby mode; VCC = 5.5 V; no load; VI = GND; fSCL = 0 kHz; I/O = inputs | 3 | |
| Standby current | 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 | ||
| Low level input voltage (SCL, SDA) | VIL | -0.5 | V | 3 | |||
| High level input voltage (SCL, SDA) | VIH | 5.5 | V | 3 | |||
| Low level output current (SDA) | IOL | 3 | mA | VOL = 0.4 V | 3 | ||
| Leakage current | IL | -1 | 1 | μA | VI = VCC = GND | 3 | |
| Input capacitance (SCL, SDA) | Ci | 6 | 10 | pF | VI = GND | 3 | |
| Low level input voltage (I/Os) | VIL | -0.5 | 0.81 | V | 4 | ||
| High level input voltage (I/Os) | VIH | 1.8 | 5.5 | V | 4 | ||
| Low level output current (I/Os) | IOL | 8 | 9 | mA | VCC = 2.3 V to 5.5 V; VOL = 0.5 V | 4 | |
| Low level output current (I/Os) | 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 = 5.5 V; VI = VCC | 4 | ||
| Low level input leakage current | ILIL | -1 | μA | VCC = 5.5 V; VI = GND | 4 | ||
| Input capacitance (I/Os) | Ci | 3.7 | 10 | pF | 4 | ||
| Output capacitance (I/Os) | Co | 3.7 | 10 | pF | 4 | ||
| Low level output current (INT) | IOL | 3 | mA | VOL = 0.4 V | 4 | ||
| Low level input voltage (A0, A1, RESET) | VIL | -0.5 | 0.81 | V | 4 | ||
| High level input voltage (A0, A1, RESET) | VIH | 1.8 | 5.5 | V | 4 | ||
| Input leakage current (A0, A1, RESET) | IL | -1 | 1 | μA | 4 | ||
| SCL clock frequency | fSCL | 0 | 100 | kHz | Standard mode I2C | 5 | |
| SCL clock frequency | fSCL | 0 | 400 | kHz | Fast mode I2C | 5 | |
| Bus free time between a STOP and START condition | tBUF | 4.7 | μs | Standard mode I2C | 5 | ||
| Bus free time between a STOP and START condition | tBUF | 1.3 | μs | Fast mode I2C | 5 | ||
| Hold time (repeated) START condition | tHD;STA | 4 | μs | Standard mode I2C | 5 | ||
| Hold time (repeated) START condition | tHD;STA | 0.6 | μs | Fast mode I2C | 5 | ||
| Set-up time for a repeated START condition | tSU;STA | 4.7 | μs | Standard mode I2C | 5 | ||
| Set-up time for a repeated START condition | tSU;STA | 0.6 | μs | Fast mode I2C | 5 | ||
| Set-up time for STOP condition | tSU;STO | 4 | μs | Standard mode I2C | 5 | ||
| Set-up time for STOP condition | tSU;STO | 0.6 | μs | Fast mode I2C | 5 | ||
| Data valid acknowledge time | tVD;ACK | 3.45 | μs | Standard mode I2C | 5 | ||
| Data valid acknowledge time | tVD;ACK | 0.9 | μs | Fast mode I2C | 5 | ||
| Data hold time | tHD;DAT | 0 | ns | Standard mode I2C | 5 | ||
| Data valid time | tVD;DAT | 3.45 | ns | Standard mode I2C | 5 | ||
| Data valid time | tVD;DAT | 0.9 | ns | Fast mode I2C | 5 | ||
| Data set-up time | tSU;DAT | 250 | ns | Standard mode I2C | 5 | ||
| Data set-up time | tSU;DAT | 100 | ns | Fast mode I2C | 5 | ||
| LOW period of the SCL clock | tLOW | 4.7 | μs | Standard mode I2C | 5 | ||
| LOW period of the SCL clock | tLOW | 1.3 | μs | Fast mode I2C | 5 | ||
| HIGH period of the SCL clock | tHIGH | 4 | μs | Standard mode I2C | 5 | ||
| HIGH period of the SCL clock | tHIGH | 0.6 | μs | Fast mode I2C | 5 |
CAD (KiCad official)
- Symbol:
PI4IOE5V9539ZDEX - Footprint:
Package_DFN_QFN:QFN-24-1EP_4x4mm_P0.5mm_EP2.6x2.6mm - 3D model: TQFN-24-EP(4x4) (KiCad packages3D, STEP)
- 3D model files:
pi4ioe5v9539zdex-etched.step/pi4ioe5v9539zdex-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);pi4ioe5v9539zdex.step/pi4ioe5v9539zdex.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Diodes Incorporated datasheet (17 pp, sha256
14b4073298db8e2b, retrieved 2026-10-18, tier: lcsc) - 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).