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Diodes Incorporated PI4IOE5V9535ZDEX
- Part No.:
- PI4IOE5V9535ZDEX
- Manufacturer:
- Diodes Incorporated
- Category:
- I/O Expanders
- Package:
- 24-VFQFN Exposed Pad
- Datasheet:
-
PI4IOE5V9535ZDEX.pdf
- Description:
- IC XPNDR 400KHZ I2C 24TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:50,198
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Product details
Overview
PI4IOE5V9535ZDEX from Diodes Incorporated is a 16-bit I²C/SMBus GPIO expander with 5V-tolerant I/Os, active-low open-drain interrupt output, and programmable input/output configuration per pin. It operates from 2.3V to 5.5V, supports up to 400 kHz I²C clocking, and features polarity inversion, noise filtering on SCL/SDA, and power-on reset. It serves as a low-power I/O extension solution for ACPI power switches, push buttons, LEDs, and sensor interfaces in space-constrained embedded systems.
For engineers reviewing the PI4IOE5V9535ZDEX datasheet, PI4IOE5V9535ZDEX pinout, PI4IOE5V9535ZDEX application, or PI4IOE5V9535ZDEX equivalent, key selection criteria include 5V I/O tolerance, interrupt-driven state-change detection, dual 8-bit register architecture (config/input/output/polarity), standby current ≤1 µA at 5.5 V, and TQFN-24 package compatibility with high-density PCB layouts.
Technical Context
The PI4IOE5V9535ZDEX implements a two-octet register map (Port 0 and Port 1) with independent configuration, input, output, and polarity inversion registers - enabling per-pin direction control and logic-level inversion without host software intervention. Its interrupt generation is edge-triggered and latched until the corresponding Input Port register is read, ensuring no state change is missed in polled or interrupt-driven firmware.
It uses standard I²C protocol with hardware address selection via A0–A2 pins (7-bit base address 0x40), supports Standard and Fast Mode (0–400 kHz), and includes internal noise filters on SCL/SDA inputs to suppress spikes ≤50 ns. The device lacks internal pull-ups (unlike PI4IOE5V9555), reducing quiescent current when I/Os are held LOW - critical for battery-powered applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 2.3 V to 5.5 V - enables direct interfacing with 3.3 V and 5 V microcontrollers without level shifters. |
| I²C Clock Frequency | 0–400 kHz - compatible with Fast Mode I²C, supporting real-time GPIO monitoring in responsive control loops. |
| Interrupt Output | Active-low open-drain - allows wired-OR connection with other interrupt sources and flexible pull-up voltage selection (up to 5.5 V). |
| Standby Current | ≤1 µA at 5.5 V - ensures minimal battery drain during system sleep modes in portable devices. |
| I/O Voltage Tolerance | 5.5 V max on I/O pins - permits safe interfacing with 5 V peripherals even when VCC = 2.3 V. |
| ESD Protection | 4 kV HBM, 1 kV CDM - meets industrial-grade robustness requirements for board-level ESD immunity. |
| Operating Temperature | −40 °C to +85 °C - qualified for extended industrial temperature operation without derating. |
Pinout & Package
PI4IOE5V9535ZDEX is housed in a 24-contact, 4 mm × 4 mm, 0.5 mm pitch Very Thin Quad Flat No-Lead (TQFN) package with exposed thermal pad. This RoHS-compliant, lead-free package supports automated reflow assembly and provides enhanced thermal performance over TSSOP-24.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| INT (Pin 22) | Open-drain interrupt output | Asserts low when any input pin state differs from its Input Port register value; requires external pull-up for proper logic level definition. |
| A0–A2 (Pins 21, 2, 3) | I²C address select inputs | Set 3-bit hardware address offset (0x40–0x47); enable up to eight devices on same I²C bus without software address management. |
| IO0_0–IO0_7 (Pins 4–11) | Port 0 bidirectional I/Os | Individually configurable as input or output via Configuration Port 0 register; support 5V-tolerant logic sensing and 10 mA sink capability. |
| IO1_0–IO1_7 (Pins 13–20) | Port 1 bidirectional I/Os | Functionally identical to Port 0; allows independent control of two 8-bit groups for modular peripheral interfacing (e.g., LED banks + button matrix). |
| SCL / SDA (Pins 23, 24) | I²C serial clock/data lines | Compliant with I²C Fast Mode timing; integrated noise filters reject transients ≤50 ns, improving bus reliability in noisy environments. |
| VCC (Pin 24) | Power supply input | Accepts 2.3–5.5 V; powers internal logic and I/O drivers; decoupling capacitor required within 10 mm for stable operation. |
| GND (Pin 12) | Ground reference | Common return path for all I/Os and internal circuitry; must be connected to low-impedance system ground plane. |
Key Features
| Feature | Design Value |
|---|---|
| Per-pin I/O direction control | Each of 16 I/Os independently configured as input or output via 8-bit Configuration Port registers - eliminates need for external multiplexers or discrete logic. |
| Polarity inversion per bit | Input data polarity inverted per-pin using Polarity Inversion registers - simplifies firmware handling of active-low sensors or switches without bit-manipulation overhead. |
| No internal pull-up resistors | Removes 100 kΩ internal pull-ups present in PI4IOE5V9535 - reduces standby current by >90% when I/Os are driven LOW, extending battery life in always-on systems. |
| Power-on reset (POR) | Internal POR circuit triggers at VPOR = 1.16–1.41 V - ensures deterministic register initialization and prevents spurious outputs during power ramp-up. |
| 5V-tolerant I/Os with 2.3V VCC | I/O pins withstand up to 5.5 V regardless of VCC level - enables mixed-voltage system design where GPIOs interface with legacy 5 V peripherals while MCU runs at 2.3–3.3 V. |
Applications
| ACPI Power Management | Industrial Button Matrix Interface |
|---|---|
Use Scenario: Monitoring power switch states and thermal shutdown signals in laptop or embedded PC platforms. IC Role / Device Role / Timing Role: GPIO expander providing interrupt-driven status reporting to EC or BMC via I²C; handles wake-from-sleep event detection. Use Value: Reduces host processor polling load; enables immediate response to power events with <4 µs INT assertion time and automatic latch until register read. | Use Scenario: Scanning 4×4 mechanical keypad in factory HMI panel with limited MCU GPIOs. IC Role / Device Role / Timing Role: Configured as 8 inputs (row scan) and 8 outputs (column drive); generates interrupt on keypress for efficient debouncing and low-latency response. Use Value: Eliminates need for dedicated keypad controller IC; supports 5V button logic while MCU operates at 3.3 V, with no external level shifters required. |
| LED Status Indication System | Multi-Sensor Signal Conditioning Hub |
Use Scenario: Driving 12 status LEDs in network switch front panel with dynamic brightness control. IC Role / Device Role / Timing Role: Acts as constant-current sink driver (via external resistors); configured as 12 outputs with polarity inversion to match common-anode LED layout. Use Value: Enables individual LED on/off control and blink patterns via I²C writes; 10 mA per I/O supports bright indicators without external drivers. | Use Scenario: Aggregating digital outputs from temperature, humidity, and motion sensors in smart building node. IC Role / Device Role / Timing Role: Provides isolated, 5V-tolerant input capture for open-collector sensor alerts; routes interrupts to MCU only when sensor state changes. Use Value: Reduces MCU wake cycles by >95% vs polling; supports direct connection to 5 V sensor outputs without signal degradation or voltage translation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar GPIO expansion applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| PI4IOE5V9555ZDEX | Includes internal 100 kΩ pull-up resistors on all I/Os; higher standby current (≥10 µA) | Better suited for floating-input applications requiring default HIGH state without external components | Select if system lacks external pull-ups and benefits from guaranteed input bias; avoid for ultra-low-power designs. |
| TCA6424ARGJR | TI part with identical 16-bit I²C GPIO, but includes glitch filter (50 ns), higher drive strength (25 mA), and different register map | Supports wider VCC range (1.65–5.5 V); requires firmware adaptation due to non-identical command byte mapping | Choose when needing stronger output drive or broader supply compatibility; verify register access sequence in firmware porting. |
Compared with PI4IOE5V9555ZDEX, the PI4IOE5V9535ZDEX delivers significantly lower standby current for battery-critical systems, while the TCA6424ARGJR offers higher drive capability and broader voltage support but demands register-level firmware updates.
Availability
PI4IOE5V9535ZDEX is available at Aetrix Electronics and suitable for industrial HMI panels, ACPI-compliant computing platforms, battery-powered sensor nodes, and multi-LED status displays requiring stable component supply and long-term manufacturability.
Supply support for PI4IOE5V9535ZDEX 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 manufacturer of discrete semiconductors and analog ICs, specializing in high-reliability, cost-optimized solutions for industrial, computing, and consumer markets.
The PI4IOE5V9535 belongs to Diodes' Pericom® I/O expansion portfolio, designed specifically for space-constrained, low-power embedded systems needing scalable, interrupt-capable GPIO resources without sacrificing voltage flexibility or robustness.
FAQ
What is the function of the INT pin, and how is it cleared?
The INT pin is an active-low, open-drain interrupt output that asserts when any input pin's state differs from its corresponding Input Port register value. It remains asserted until the host reads the Input Port register for the affected port (Port 0 or Port 1). Reading one port does not clear interrupts from the other port - both must be read independently to fully deassert INT.
Can PI4IOE5V9535ZDEX operate with VCC = 2.3 V while interfacing with 5 V sensors?
Yes. All 16 I/O pins are 5V tolerant up to 5.5 V regardless of VCC level, allowing direct connection to 5 V open-collector or push-pull sensor outputs while the device runs at 2.3 V. No external level-shifting components are required, preserving signal integrity and board space.
How does the absence of internal pull-up resistors affect system design?
The removal of internal pull-ups (vs. PI4IOE5V9535) reduces standby current by >90%, making it ideal for battery-powered applications. However, external pull-up resistors must be added on I²C lines (SCL/SDA) and any I/O used as inputs with floating sources - typically 4.7 kΩ for 3.3 V or 10 kΩ for 5 V buses.
What is the maximum total current allowed across all I/O pins?
The absolute maximum total current sourced or sunk across all 16 I/Os is 200 mA, with a per-octal limit of 100 mA (IO0_0–IO0_7 or IO1_0–IO1_7). Additionally, the total sourced current must not exceed 160 mA. These limits ensure thermal stability and prevent latch-up under sustained load conditions.
PI4IOE5V9535ZDEX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 24-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Number of I/O:
- 16
- Interface:
- I2C
- Interrupt Output:
- Yes
- Features:
- -
- Output Type:
- -
- Current - Output Source/Sink:
- -
- Clock Frequency:
- 400 kHz
- Voltage - Supply:
- 2.3V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 24-TQFN (4x4)
PI4IOE5V9535ZDEX FAQ
1.How can I place an order for PI4IOE5V9535ZDEX through Aetrix?
Please submit a Request for Quotation (RFQ) for PI4IOE5V9535ZDEX 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 PI4IOE5V9535ZDEX reliable?
The price and inventory of PI4IOE5V9535ZDEX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PI4IOE5V9535ZDEX is usually 5 days.
3.What payment methods are accepted for PI4IOE5V9535ZDEX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PI4IOE5V9535ZDEX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PI4IOE5V9535ZDEX?
PI4IOE5V9535ZDEX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PI4IOE5V9535ZDEX 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 PI4IOE5V9535ZDEX?
For technical support, including PI4IOE5V9535ZDEX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PI4IOE5V9535ZDEX requirements.
6.How does Aetrix verify that PI4IOE5V9535ZDEX is sourced from the original manufacturer or authorized distributors?
All PI4IOE5V9535ZDEX 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 PI4IOE5V9535ZDEX meets industry standards.
7.What is the process for return or replacement of PI4IOE5V9535ZDEX?
All PI4IOE5V9535ZDEX units undergo pre-shipment inspection (PSI). If there is an issue with PI4IOE5V9535ZDEX, 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 PI4IOE5V9535ZDEX part is unused and in its original packaging.
Return procedure for PI4IOE5V9535ZDEX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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