My Inquiry
My Account
Diodes Incorporated PI4IOE5V9535LEX
- Part No.:
- PI4IOE5V9535LEX
- Manufacturer:
- Diodes Incorporated
- Category:
- I/O Expanders
- Package:
- 24-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
PI4IOE5V9535LEX.pdf
- Description:
- IC XPNDR 400KHZ I2C 24TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:11,281
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
PI4IOE5V9535LEX 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-filtered SCL/SDA inputs, and power-on reset. Used in ACPI power switches, push-button interfaces, LED drivers, and sensor monitoring systems.
For engineers reviewing the PI4IOE5V9535LEX datasheet, PI4IOE5V9535LEX pinout, PI4IOE5V9535LEX application, or PI4IOE5V9535LEX equivalent, key selection criteria include 5V I/O tolerance, low standby current (≤1 µA), interrupt-driven input change detection, and dual-package availability (TSSOP-24/TQFN-24) for space-constrained embedded designs.
Technical Context
The device implements two independent 8-bit I/O ports (IO0_0–IO0_7 and IO1_0–IO1_7), each with dedicated configuration, input, output, and polarity inversion registers. All 16 I/Os are individually configurable as input or output via Configuration Port registers (0x06/0x07), and input state changes trigger the open-drain INT pin only when the corresponding bit is set as input.
It uses standard I²C protocol with fixed 7-bit address (0x20–0x27) determined by A0/A1/A2 pins, supports Standard (100 kHz) and Fast Mode (400 kHz), and includes internal power-on reset circuitry that initializes all registers to default states - including all I/Os as high-impedance inputs with internal weak pull-ups enabled at reset.
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 Hz to 400 kHz - supports Fast Mode I²C for responsive host communication in real-time control loops. |
| I/O Voltage Tolerance | 5.5 V max on I/O pins - allows safe connection to 5 V logic signals even when VCC = 2.3 V. |
| Standby Current | ≤1 µA at VCC = 5.5 V - critical for battery-powered systems requiring ultra-low quiescent power. |
| Interrupt Output | Active-low open-drain - simplifies wired-OR interrupt bus design with multiple expanders sharing one MCU interrupt line. |
| 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 ambient operation without derating. |
Pinout & Package
PI4IOE5V9535LEX is offered in two RoHS-compliant, lead-free packages: 24-pin TSSOP (173-mil width) and 24-contact TQFN (4 mm × 4 mm, 0.5 mm pitch). Both packages share identical pin functions and numbering (TSSOP pin 1 ↔ TQFN pin 22).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| INT (Pin 1 / 22) | Open-drain interrupt output | Asserts low when any configured input pin changes state; requires external pull-up to host VCC. |
| A0–A2 (Pins 18, 2, 3 / 21, 23, 24) | I²C address select inputs | Set 3-bit slave address offset (0x20–0x27); tied to GND/VCC to enable up to eight devices on one bus. |
| SCL / SDA (Pins 22, 23 / 19, 20) | I²C serial clock/data lines | Compliant with SMBus timing; SDA has integrated noise filter and open-drain structure. |
| IO0_0–IO0_7 (Pins 4–11 / 1–8) | Port 0 bidirectional I/Os | Individually configurable as input (high-Z) or output (push-pull); 5V tolerant regardless of VCC. |
| IO1_0–IO1_7 (Pins 13–20 / 10–17) | Port 1 bidirectional I/Os | Functionally identical to Port 0; both ports support polarity inversion and independent register access. |
| VCC (Pin 24 / 21) | Power supply input | Supplies core logic and I/O drivers; decoupling capacitor required within 10 mm of pin. |
| GND (Pin 12 / 9) | Ground reference | Common return path for all I/Os and internal circuitry; must be low-impedance connection to system ground plane. |
Key Features
| Feature | Design Value |
|---|---|
| Individual I/O direction control | Each of 16 pins independently set as input or output via Configuration Port registers - enables mixed-signal interface design without external logic. |
| Polarity inversion per I/O | Per-bit inversion of Input Port register data via Polarity Inversion registers - eliminates software XOR for active-low sensor inputs. |
| Noise-filtered I²C inputs | SCL/SDA inputs include internal spike suppression (50 ns pulse rejection) - improves bus reliability in electrically noisy industrial environments. |
| Power-on reset with VPOR = 1.16–1.41 V | Guarantees known initial state (all I/Os as inputs, outputs = high) before firmware initialization - prevents undefined I/O glitches at startup. |
| Zero static current in standby mode | Standby current ≤1 µA with I/Os held at VCC or GND - enables multi-year battery life in always-on remote sensors and IoT endpoints. |
Applications
| ACPI Power Management | Industrial Push-Button Interface |
|---|---|
|
Use Scenario: Monitoring chassis intrusion switches, lid-open sensors, and thermal shutdown flags in embedded PCs and servers. IC Role / Device Role / Timing Role: GPIO expander providing interrupt-driven status reporting to EC or BMC over SMBus. Use Value: Reduces host GPIO count while enabling immediate response to safety-critical events via hardware interrupt - no polling overhead. |
Use Scenario: Scanning mechanical push buttons and toggle switches in factory HMIs and control panels. IC Role / Device Role / Timing Role: Input port aggregator with debounced edge detection via INT assertion and register read-back. Use Value: Eliminates need for discrete RC debounce circuits and MCU timer resources - simplifies firmware and improves reliability. |
| LED Status Indication | Multi-Sensor Data Acquisition |
|
Use Scenario: Driving 16 status LEDs (power, fault, comms, activity) in network equipment and power supplies. IC Role / Device Role / Timing Role: Output port controller with configurable drive strength and 5V tolerance for direct LED anode/cathode control. Use Value: Supports mixed-voltage LED strings (3.3 V or 5 V) without external level shifters or current-limiting resistors on MCU side. |
Use Scenario: Reading digital outputs from temperature, humidity, motion, and door-position sensors in smart building nodes. IC Role / Device Role / Timing Role: Parallel input aggregator with polarity inversion to normalize active-high/active-low sensor outputs. Use Value: Enables single I²C transaction to capture 16 sensor states - reduces bus traffic and host processing latency vs. individual polling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar GPIO expansion applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| PCA9555DWR | Includes internal 100 kΩ I/O pull-up resistors; higher ICC (100 µA typical) in active mode. | Lacks 5V tolerance - requires external level translation for 5 V sensors/switches. | Select when internal pull-ups simplify BOM and 5V interfacing is not required. |
| TCA6424ARGJR | 3.3 V only supply (1.65–3.6 V); supports 1 MHz I²C; lower standby current (0.1 µA). | Not 5V tolerant; incompatible with 5 V signal domains without level shifters. | Select for ultra-low-power 3.3 V systems where higher speed and minimal quiescent current outweigh voltage flexibility. |
Compared with PCA9555DWR and TCA6424ARGJR, PI4IOE5V9535LEX uniquely balances wide supply range (2.3–5.5 V), 5V I/O tolerance, sub-µA standby, and interrupt-driven input monitoring - making it optimal for mixed-voltage industrial control and legacy-compatible embedded designs.
Availability
PI4IOE5V9535LEX is available at Aetrix Electronics and suitable for industrial HMIs, server management controllers, and smart sensor hubs requiring stable component supply across long product lifecycles.
Supply support for PI4IOE5V9535LEX 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 components for industrial, computing, and consumer applications.
The PI4IOE5V9535LEX belongs to Diodes' Pericom® I²C GPIO expander family, designed specifically to extend microcontroller I/O capability in space-constrained, mixed-voltage embedded systems with robust interrupt handling and low-power operation.
FAQ
What is the function of the polarity inversion register?
The polarity inversion register (addresses 0x04 and 0x05) allows per-bit inversion of data read from the Input Port registers. When a bit is set to '1', the corresponding input bit is logically inverted before being presented to the host - enabling direct compatibility with active-low sensors or switches without software XOR operations.
How does the interrupt output behave during I/O reconfiguration?
If an I/O pin is changed from output to input while its external voltage differs from the stored Input Port register value, a false interrupt may occur. This happens because the input state does not match the prior register content. To avoid spurious interrupts, configure I/O direction before applying external signals or clear the interrupt by reading the relevant Input Port register immediately after reconfiguration.
Can PI4IOE5V9535LEX drive LEDs directly?
Yes - each I/O can source up to 10 mA (VCC = 3.0 V) or sink up to 10 mA (VOL = 0.7 V), sufficient for standard indicator LEDs. For anode-connected LEDs, configure the pin as output and drive low; for cathode-connected, drive high. External current-limiting resistors are still required to set LED current and prevent exceeding per-pin limits.
What is the maximum total current allowed across all I/Os?
The absolute maximum total current sourced by all I/Os is 160 mA. Additionally, each octal group (IO0_0–IO0_7 or IO1_0–IO1_7) must be limited to 100 mA, and each individual I/O must not exceed ±25 mA. These limits ensure thermal stability and prevent latch-up under sustained load conditions.
PI4IOE5V9535LEX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 24-TSSOP (0.173", 4.40mm Width)
- 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-TSSOP
PI4IOE5V9535LEX FAQ
1.How can I place an order for PI4IOE5V9535LEX through Aetrix?
Please submit a Request for Quotation (RFQ) for PI4IOE5V9535LEX 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 PI4IOE5V9535LEX reliable?
The price and inventory of PI4IOE5V9535LEX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PI4IOE5V9535LEX is usually 5 days.
3.What payment methods are accepted for PI4IOE5V9535LEX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PI4IOE5V9535LEX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PI4IOE5V9535LEX?
PI4IOE5V9535LEX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PI4IOE5V9535LEX 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 PI4IOE5V9535LEX?
For technical support, including PI4IOE5V9535LEX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PI4IOE5V9535LEX requirements.
6.How does Aetrix verify that PI4IOE5V9535LEX is sourced from the original manufacturer or authorized distributors?
All PI4IOE5V9535LEX 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 PI4IOE5V9535LEX meets industry standards.
7.What is the process for return or replacement of PI4IOE5V9535LEX?
All PI4IOE5V9535LEX units undergo pre-shipment inspection (PSI). If there is an issue with PI4IOE5V9535LEX, 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 PI4IOE5V9535LEX part is unused and in its original packaging.
Return procedure for PI4IOE5V9535LEX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
PI4IOE5V9535LEX Tags
-
TCA6408ARSVR
Texas Instruments
-
TCA9535RTWR
Texas Instruments
-
FXL6408UMX
onsemi
-
PCF8574ADWR
Texas Instruments
-
PCF8574APWR
Texas Instruments
-
TCA9555PWR
Texas Instruments
-
TCA9554PWR
Texas Instruments
-
TCA9554APWR
Texas Instruments
-
TCA9539PWR
Texas Instruments
-
TCA9534PWR
Texas Instruments
-
TCA9555RTWR
Texas Instruments
-
TCA9535PWR
Texas Instruments
Tech Hub
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
LDO regulator guide covering low dropout voltage, power dissipation, thermal design, PSRR, output noise, capacitor stability, adjustable LDO circuits, LDO vs buck converter and datasheet selection chec…
Conditional Access Module guide covering CAM meaning, CI/CI+ interface, smart card authorization, DVB security workflow, TV and set-top box compatibility, internal electronics, ESD protection, connecto…
Guide to electronic component obsolescence covering EOL risk, PCN/PDN notices, last-time buy planning, replacement options, form-fit-function validation, counterfeit risk and BOM lifecycle management.
18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…
Hall effect sensor guide covering working principle, linear and digital sensors, Arduino circuits, current sensing, speed detection, automotive applications, A3144 examples, signal filtering and datash…
Product Change Notification guide for electronic components, covering PCN meaning, PCN vs PDN/EOL, common change types, risk levels, form-fit-function review, engineering validation, BOM control, LTB/L…
A practical guide to blend door actuators, covering HVAC function, symptoms, location, AC and heater issues, reset and calibration, replacement cost, electrical diagnosis, compatibility checks, and rep…
Engineering guide to Raspberry Pi alternatives, covering chip-level differences, Orange Pi, ROCK, Jetson, Banana Pi, NanoPi, Compute Module, Pico, GPIO, camera, HAT compatibility, and replacement risks…
