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Home > Products > Integrated Circuits (ICs) > Interface > I/O Expanders

Diodes Incorporated PI4IOE5V6408ZTAEX

Name: PI4IOE5V6408ZTAEX
Brand: Diodes Incorporated
SKU: PI4IOE5V6408ZTAEX
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: PI4IOE5V6408ZTAEX

Manufacturer:: Diodes Incorporated

Category:: I/O Expanders

Package:: 16-UFQFN

Datasheet:: PI4IOE5V6408ZTAEX.pdf

Description:: IC XPNDR 1MHZ I2C 16UQFN

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Product details

Overview

PI4IOE5V6408ZTAEX from Diodes Incorporated is an 8-bit I²C-bus I/O expander with bidirectional voltage-level translation, supporting 1.65–4.0 V GPIO port and 1.65–3.6 V I²C bus operation. It delivers 1 MHz I²C interface compliance, programmable internal pull-up/pull-down resistors (100 kΩ typical), active-low open-drain interrupt output, and software reset capability. Used in battery-powered mobile systems for sensor, keypad, and push-button interfacing.

For engineers reviewing the PI4IOE5V6408ZTAEX datasheet, PI4IOE5V6408ZTAEX pinout, PI4IOE5V6408ZTAEX application, or PI4IOE5V6408ZTAEX equivalent, key selection criteria include dual-supply domain support (VDD(I2C_bus)/VDD(P)), interrupt masking per GPIO, input default state configuration, and 1.5 μA standby current at 3.3 V - critical for low-power embedded host expansion.

Technical Context

The PI4IOE5V6408 implements a register-mapped I²C slave architecture with dedicated control registers for I/O direction (03h), output state (05h), input default (09h), interrupt mask (11h), and pull-up/down selection (0Dh). All 8 GPIOs (P0–P7) are push-pull capable and power-on configured as high-impedance inputs.

Its dual-voltage architecture isolates SDA/SCL logic levels (1.65–3.6 V) from GPIO port levels (1.65–4.0 V), enabling level translation between 1.8 V microcontrollers and 3.3 V peripherals. The INT pin asserts low on input state change relative to the Input Default State register, with per-pin masking enabled via the Interrupt Mask register.

Key Specifications

Parameter	Value and Actual Design Meaning
I²C Speed	Up to 1 MHz - supports Fast Mode Plus timing for high-throughput host communication.
VDD(I2C_bus)	1.65–3.6 V - powers SDA/SCL interface and internal logic; defines I²C logic thresholds.
VDD(P)	1.65–4.0 V - supplies GPIO port; sets output high/low voltage levels and input thresholds.
Standby Current	1.5 μA typical at 3.3 V - enables ultra-low-power sleep mode in portable devices.
Interrupt Output	Active-low open-drain - requires external pull-up; asserts when GPIO input deviates from default state.
Internal Pull Resistors	100 kΩ typical - programmable per-pin pull-up or pull-down, reducing external component count.
Reset Function	Hardware (active-low RESET pin) and software (via Device ID register bit B0) - ensures deterministic initialization.

Pinout & Package

Package: 16-pin UQFN (1.8 mm × 2.6 mm, 0.4 mm pitch), lead-free and RoHS-compliant.

Pin/Terminal	Circuit Role	Design Meaning
1 (INT)	Interrupt output	Active-low open-drain signal indicating GPIO input state change vs. default register value.
2 (VDD(P))	GPIO port supply	Sets logic levels and drive strength for P0–P7; independent of I²C bus supply.
3–8, 11–12 (P7–P0)	Configurable GPIO	Push-pull I/Os; direction, output state, and pull configuration controlled via I²C registers.
9 (ADDR)	Device address select	Binary choice (GND/VDD(I2C_bus)) sets I²C slave address to 0x23 or 0x24.
10 (RESET)	Hardware reset input	Active-low asynchronous reset; restores all registers to power-on defaults.
13 (SCL)	I²C clock input	Open-drain input requiring external pull-up; accepts 1.65–3.6 V logic levels.
14 (SDA)	I²C data bidirectional	Open-drain bidirectional line; shares same voltage domain and pull-up as SCL.
15 (VDD(I2C_bus))	I²C interface supply	Powers internal I²C logic and defines SDA/SCL input thresholds; must match host MCU voltage.
16 (GND)	Common reference	Single ground connection shared by both supply domains and I/Os.

Key Features

Feature	Design Value
Bidirectional voltage translation	Enables interoperability between 1.8 V MCU I²C and 3.3 V GPIO peripherals without external level shifters.
Per-GPIO interrupt masking	Allows selective disabling of INT assertion for specific pins via Interrupt Mask register (11h), simplifying event handling.
Programmable input default state	Input Default State register (09h) defines baseline logic level for interrupt triggering - essential for debounced switch detection.
Software-initiated reset	Writing '1' to bit B0 of Device ID register (01h) triggers full register reset - eliminates need for hardware RESET pulse in firmware recovery.
High-impedance output control	Output High-Impedance register (07h) disables driver FETs per pin - supports wired-OR configurations and safe hot-swap.

Applications

Smartphone Keypad Interface

Industrial Sensor Hub

Use Scenario: Expanding GPIO count on a 1.8 V application processor to scan a 4×4 mechanical keypad matrix while minimizing PCB area and BOM cost.

IC Role / Device Role / Timing Role: I²C slave I/O expander providing 8 configurable push-pull GPIOs with per-pin interrupt masking and 1.5 μA standby current.

Use Value: Eliminates discrete level shifters and reduces host-side GPIO resource pressure; enables wake-on-keypress with sub-μA system sleep current.

Use Scenario: Aggregating status signals from eight analog temperature sensors and digital limit switches in a DIN-rail mounted PLC module operating at 3.3 V.

IC Role / Device Role / Timing Role: Remote I/O node translating 3.3 V sensor outputs to 1.8 V I²C master MCU, with programmable pull-ups for open-collector switch inputs.

Use Value: Supports mixed-voltage sensor interfacing without external biasing; interrupt-driven polling reduces I²C bus traffic and host CPU load.

Wearable Health Monitor

Automotive Infotainment Control Panel

Use Scenario: Adding tactile button and LED indicator control to a compact wearable device powered by a 3.0 V Li-ion battery and managed by a 1.8 V ARM Cortex-M0+ MCU.

IC Role / Device Role / Timing Role: Low-quiescent-current I/O expander with dual-supply domains, enabling direct 3.0 V LED drive and 1.8 V I²C communication.

Use Value: Achieves 1.5 μA standby current and supports 3.0 V GPIO outputs - extends battery life while eliminating boost converters for indicator drivers.

Use Scenario: Managing backlight dimming, touchpad status, and soft-key inputs in a car audio head unit where main SoC runs at 1.2 V core but peripheral I/O operates at 3.3 V.

IC Role / Device Role / Timing Role: Voltage-translating I/O expander bridging 1.2 V I²C bus (via level-shifter buffer) and 3.3 V panel interface, with interrupt-driven input monitoring.

Use Value: Enables reliable cross-domain signaling without timing skew; latch-up tested (>100 mA) ensures robustness in automotive EMI environments.

Equivalent & Alternatives

The following parts are listed as comparable options for similar I/O expansion applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
PCA9554APW,118	No voltage translation; single 2.3–5.5 V supply domain; no programmable pull resistors; fixed 100 kΩ internal pulls.	Limited to same-voltage I²C and GPIO domains; lacks per-pin interrupt masking and input default configuration.	Choose when only basic 8-bit expansion is needed and host/peripheral share identical VDD.
TCA6408APWR	Supports 1.65–5.5 V VDD; includes glitch filtering on inputs; no software reset; higher 3 μA standby current at 3.3 V.	Offers enhanced noise immunity for industrial environments but lacks GPIO-port voltage independence and interrupt masking granularity.	Prefer for noisy factory-floor applications where input filtering outweighs low-power and translation requirements.

Compared with PCA9554APW,118 and TCA6408APWR, the PI4IOE5V6408ZTAEX uniquely combines independent GPIO/I²C supply domains, per-pin interrupt masking, and software reset - making it optimal for power-constrained, multi-voltage embedded systems requiring precise input event control.

Availability

PI4IOE5V6408ZTAEX is available at Aetrix Electronics and suitable for smartphone keypad interfaces, industrial sensor hubs, wearable health monitors, and automotive infotainment control panels requiring stable component supply and long-term production continuity.

Supply support for PI4IOE5V6408ZTAEX includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Diodes Incorporated is a global semiconductor company specializing in discrete, analog, and mixed-signal ICs, with design and manufacturing facilities certified to IATF 16949 and ISO 9001 standards.

The PI4IOE5V6408 belongs to Diodes' I/O expansion product line, engineered specifically for low-power, multi-voltage embedded systems needing flexible GPIO extension without external level-shifting components.

FAQ

What is the maximum allowable voltage on the P0–P7 pins?

The absolute maximum voltage on P0–P7 is +4.0 V, aligned with the VDD(P) operating range of 1.65–4.0 V. Exceeding this risks permanent damage. Input voltage must remain within 0 to VDD(P); output high-level voltage is VDD(P) – 0.2 V at 100 μA sink, ensuring compatibility with downstream 3.3 V or 1.8 V receivers.

How does the interrupt generation mechanism work?

INT asserts low when any GPIO input changes state relative to its stored value in the Input Default State register (09h). Each pin's interrupt can be individually masked via the Interrupt Mask register (11h). Reading the Interrupt Status register (13h) clears the corresponding flag and de-asserts INT - enabling edge-triggered, non-maskable event capture.

Can the PI4IOE5V6408ZTAEX operate with different voltages on VDD(I2C_bus) and VDD(P)?

Yes - it is explicitly designed for dual-supply operation: VDD(I2C_bus) ranges from 1.65 V to 3.6 V (for SDA/SCL logic), while VDD(P) ranges from 1.65 V to 4.0 V (for P0–P7 I/O). This enables true bidirectional level translation, e.g., 1.8 V MCU I²C ↔ 3.3 V sensor interface, without external translators.

Is there internal ESD protection, and what is its rating?

The PI4IOE5V6408ZTAEX features on-chip ESD protection rated at 2 kV HBM (Human Body Model) per JESD22-A114. It also meets latch-up immunity exceeding 100 mA per JESD78, ensuring robustness against transient events in handheld and industrial environments - no external TVS diodes required for basic I/O protection.

PI4IOE5V6408ZTAEX Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Series:: -

Package/Case:: 16-UFQFN

Packaging:: Tape & Reel (TR)

Product Status:: Active

Programmable:: Not Verified

Number of I/O:: 8

Interface:: I2C

Interrupt Output:: Yes

Features:: -

Output Type:: Push-Pull

Current - Output Source/Sink:: -

Clock Frequency:: 1 MHz

Voltage - Supply:: 1.65V ~ 3.6V

Operating Temperature:: -40°C ~ 85°C

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 16-UQFN (1.8x2.6)

PI4IOE5V6408ZTAEX FAQ

1.How can I place an order for PI4IOE5V6408ZTAEX through Aetrix?

Please submit a Request for Quotation (RFQ) for PI4IOE5V6408ZTAEX on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for PI4IOE5V6408ZTAEX reliable?

The price and inventory of PI4IOE5V6408ZTAEX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PI4IOE5V6408ZTAEX is usually 5 days.

3.What payment methods are accepted for PI4IOE5V6408ZTAEX?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PI4IOE5V6408ZTAEX transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for PI4IOE5V6408ZTAEX?

PI4IOE5V6408ZTAEX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your PI4IOE5V6408ZTAEX order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for PI4IOE5V6408ZTAEX?

For technical support, including PI4IOE5V6408ZTAEX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PI4IOE5V6408ZTAEX requirements.

6.How does Aetrix verify that PI4IOE5V6408ZTAEX is sourced from the original manufacturer or authorized distributors?

All PI4IOE5V6408ZTAEX products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that PI4IOE5V6408ZTAEX meets industry standards.

7.What is the process for return or replacement of PI4IOE5V6408ZTAEX?

All PI4IOE5V6408ZTAEX units undergo pre-shipment inspection (PSI). If there is an issue with PI4IOE5V6408ZTAEX, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The PI4IOE5V6408ZTAEX part is unused and in its original packaging.

Return procedure for PI4IOE5V6408ZTAEX:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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