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Diodes Incorporated PI4IOE5V9538LE
- Part No.:
- PI4IOE5V9538LE
- Manufacturer:
- Diodes Incorporated
- Category:
- I/O Expanders
- Package:
- 16-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
PI4IOE5V9538LE.pdf
- Description:
- IC XPNDR 400KHZ SMBUS 16TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,614
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Product details
Overview
PI4IOE5V9538LE from Diodes Incorporated is an 8-bit I²C/SMBus GPIO expander with active-low interrupt and reset, 5V-tolerant I/Os, 2.3V–5.5V supply operation, and 400 kHz clock support. It serves as a parallel I/O extension for microcontroller-based systems in ACPI power control, sensor interfacing, push-button monitoring, and LED/fan management.
For engineers reviewing the PI4IOE5V9538LE datasheet, PI4IOE5V9538LE pinout, PI4IOE5V9538LE application, or PI4IOE5V9538LE equivalent, key selection criteria include I²C address configurability (A0/A1), open-drain INT output timing (≤4 µs valid time), polarity inversion register capability, and dual-package availability (TSSOP-16/TQFN-4x4-16) for space-constrained designs.
Technical Context
The PI4IOE5V9538LE implements an I²C slave interface with fixed 7-bit address (0xE0–0xE6) configurable via A0/A1 pins, supporting Standard (100 kHz) and Fast Mode (400 kHz) bus speeds. Its internal register map includes Input Port (read-only), Output Port (write-only), Polarity Inversion, and Configuration registers - enabling per-pin direction control and input state inversion without host-side bit manipulation.
It features hardware-level power-on reset (VPOR = 1.16–1.41 V) and asynchronous active-low RESET input with 25 ns minimum pulse width, both initializing all registers to default states (I/Os as inputs, outputs high). The open-drain INT output asserts on any input state change and clears upon Input Port register read or return to prior state.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 2.3 V to 5.5 V - supports direct interfacing with 3.3 V and 5 V logic domains without level shifters. |
| I²C Clock Frequency | 0 Hz to 400 kHz - compatible with Fast Mode I²C for responsive host polling and low-latency interrupt handling. |
| I/O Voltage Tolerance | 5 V tolerant - allows connection to 5 V peripherals while powered from 2.3–3.6 V supplies. |
| Standby Current | 0.25–1 µA at 5.5 V - enables ultra-low-power operation in battery-backed or energy-harvesting systems. |
| Interrupt Valid Time | ≤4 µs - ensures timely notification of input transitions for real-time event capture in embedded control loops. |
| ESD Protection | 4 kV HBM / 1 kV CDM - provides robustness against handling and board-level electrostatic discharge in industrial environments. |
| Operating Temperature | −40 °C to +85 °C - qualified for extended industrial temperature range operation without derating. |
Pinout & Package
Available in Pb-free, RoHS-compliant TSSOP-16 (L) and TQFN-4×4-16 (ZY) packages. Both variants share identical pin functions and electrical characteristics.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0, A1 | I²C address select inputs | Set device address bits A1:A0 (00–11), enabling up to four expanders on same I²C bus without address conflict. |
| RESET | Asynchronous active-low reset | Forces register initialization and SMBus state machine reset without cycling VCC; requires external pull-up. |
| INT | Open-drain interrupt output | Asserts low when configured input changes state; must be externally pulled up to host logic voltage. |
| SCL/SDA | I²C bidirectional clock/data lines | Support standard I²C protocol with integrated noise filtering; tolerate 5 V signals regardless of VCC. |
| IO0–IO7 | Configurable I/O ports | Each pin independently set as input (high-Z) or output (push-pull); 5 V tolerant in input mode. |
| VCC, GND | Power supply and ground | VCC powers internal logic and I/O drivers; GND reference for all digital and analog functions. |
Key Features
| Feature | Design Value |
|---|---|
| Polarity Inversion Register | Per-bit inversion of Input Port register data - eliminates software XOR operations for inverted-sense button or switch inputs. |
| Noise Filter on SCL/SDA | 50 ns spike suppression - prevents false I²C start/stop detection in electrically noisy industrial or automotive harness environments. |
| Individual I/O Configuration | 8-bit Configuration register sets each IO0–IO7 as input or output - enables mixed-mode usage (e.g., IO0–IO3 as inputs for buttons, IO4–IO7 as outputs for LEDs). |
| Power-on Reset (POR) | Internal POR circuit triggers at VPOR = 1.16–1.41 V - guarantees known initial state without external reset IC or RC network. |
| Low ICC in Operating Mode | 40–60 µA at 5.5 V / 400 kHz - reduces system-level power budget impact in always-on IoT edge nodes and portable devices. |
Applications
| ACPI Power Switch Control | Sensor Interface Expansion |
|---|---|
|
Use Scenario: Managing multiple AC power rails in embedded computing platforms using discrete push-button or mechanical switch inputs. IC Role / Device Role / Timing Role: GPIO expander providing debounced, interrupt-driven status reporting of power-on/off switches to host MCU via I²C. Use Value: Reduces MCU GPIO count requirement by 8 pins while delivering sub-4 µs interrupt latency for immediate power-state response. |
Use Scenario: Adding digital sensor inputs (e.g., door/window contact, motion detector, temperature alarm) to resource-constrained microcontrollers. IC Role / Device Role / Timing Role: I/O extender with configurable polarity inversion to match normally-open/closed sensor logic without external inverters. Use Value: Enables direct connection of 5 V sensors to 3.3 V hosts using 5 V-tolerant inputs, eliminating level-shifter components and BOM cost. |
| LED & Fan Monitoring | Industrial Push-Button Panel |
|
Use Scenario: Driving status LEDs and monitoring fan tachometer signals in industrial HMIs and power supplies. IC Role / Device Role / Timing Role: Dual-role I/O port: outputs drive LEDs (sinking up to 13 mA at 2.3 V), inputs monitor open-collector fan pulses. Use Value: Single-chip solution replaces discrete transistors and optocouplers; standby current ≤1 µA extends battery life in maintenance-free deployments. |
Use Scenario: Front-panel operator interface with multi-button array requiring ESD-hardened, noise-immune input capture. IC Role / Device Role / Timing Role: Robust input expander with 4 kV HBM ESD rating and integrated SCL/SDA noise filtering for reliable operation in factory-floor EMI environments. Use Value: Eliminates need for external RC debounce networks and Schmitt-trigger buffers, reducing PCB area and assembly steps. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar I²C GPIO expander applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| PCA9538APW | Same 8-bit I²C GPIO, but lacks polarity inversion register and has higher standby current (3 µA vs. 0.25 µA). | Less suitable for inverted-sense inputs; higher quiescent draw limits use in battery-powered edge nodes. | Select PCA9538APW only if polarity inversion is unused and legacy footprint compatibility is required. |
| TCA6408AIPWR | Includes interrupt masking per-pin and lower max I²C speed (100 kHz only); no 5 V tolerance on I/Os. | Requires external level shifters for 5 V sensors; unsuitable for fast-event detection due to slower bus timing. | Choose TCA6408AIPWR when per-pin interrupt masking is critical and system operates exclusively at 3.3 V. |
Compared with PCA9538APW and TCA6408AIPWR, the PI4IOE5V9538LE uniquely combines 5 V-tolerant I/Os, sub-1 µA standby current, polarity inversion, and 400 kHz I²C support - making it optimal for compact, low-power, mixed-voltage industrial control interfaces.
Availability
PI4IOE5V9538LE is available at Aetrix Electronics and suitable for industrial HMIs, battery-powered IoT gateways, and automotive body-control modules requiring stable component supply across long production lifecycles.
Supply support for PI4IOE5V9538LE 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 power management, signal integrity, and interface solutions for industrial, computing, and consumer markets.
The PI4IOE5V9538LE belongs to Diodes' Pericom® interface portfolio, designed specifically for I²C/SMBus peripheral expansion in space- and power-constrained embedded systems where robustness and mixed-voltage interoperability are essential.
FAQ
What is the function of the A0 and A1 pins on the PI4IOE5V9538LE?
A0 and A1 are hardware address-select inputs that configure the two least-significant bits of the device's 7-bit I²C slave address (base 0xE0). Setting A0/A1 to 00, 01, 10, or 11 yields addresses 0xE0, 0xE2, 0xE4, or 0xE6 respectively - allowing up to four identical expanders on one I²C bus without software address remapping.
Can the PI4IOE5V9538LE drive LEDs directly, and what are the current limits?
Yes - each I/O pin can sink up to 10–13 mA at 2.3 V (VOL = 0.5–0.7 V), with total device sink current limited to 200 mA. For LED driving, connect the anode to VCC through a current-limiting resistor and cathode to an I/O pin configured as output. External current limiting per pin is mandatory; maximum per-octal (IO0–IO7) is 100 mA.
How does the interrupt output (INT) behave during I/O configuration changes?
The INT pin asserts low when any input-configured I/O changes state. However, switching an I/O from output to input may cause a false interrupt if the external pin voltage differs from the stored Input Port register value. To avoid spurious interrupts, read the Input Port register immediately after reconfiguring I/O direction, or ensure external voltage matches expected logic level before changing configuration.
Is the PI4IOE5V9538LE suitable for automotive applications?
The PI4IOE5V9538LE is not AEC-Q100 qualified. While it operates across −40 °C to +85 °C and includes 4 kV HBM ESD protection, Diodes explicitly states that automotive-grade versions require separate qualification (PPAP, IATF 16949 manufacturing, AEC-Q100/101 testing) - available only under distinct part numbers and subject to special ordering procedures.
PI4IOE5V9538LE Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 16-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Programmable:
- Not Verified
- Number of I/O:
- 8
- Interface:
- SMBus
- Interrupt Output:
- Yes
- Features:
- POR
- Output Type:
- Push-Pull
- Current - Output Source/Sink:
- -
- Clock Frequency:
- 400 kHz
- Voltage - Supply:
- 2.3V ~ 5.5V
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-TSSOP
PI4IOE5V9538LE FAQ
1.How can I place an order for PI4IOE5V9538LE through Aetrix?
Please submit a Request for Quotation (RFQ) for PI4IOE5V9538LE 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 PI4IOE5V9538LE reliable?
The price and inventory of PI4IOE5V9538LE are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PI4IOE5V9538LE is usually 5 days.
3.What payment methods are accepted for PI4IOE5V9538LE?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PI4IOE5V9538LE transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PI4IOE5V9538LE?
PI4IOE5V9538LE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PI4IOE5V9538LE 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 PI4IOE5V9538LE?
For technical support, including PI4IOE5V9538LE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PI4IOE5V9538LE requirements.
6.How does Aetrix verify that PI4IOE5V9538LE is sourced from the original manufacturer or authorized distributors?
All PI4IOE5V9538LE 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 PI4IOE5V9538LE meets industry standards.
7.What is the process for return or replacement of PI4IOE5V9538LE?
All PI4IOE5V9538LE units undergo pre-shipment inspection (PSI). If there is an issue with PI4IOE5V9538LE, 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 PI4IOE5V9538LE part is unused and in its original packaging.
Return procedure for PI4IOE5V9538LE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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