PCA9535EDWR2G ON Semiconductor Integrated Circuit (Small Outline Packages) In Stock
The ON Semiconductor PCA9535EDWR2G is a 16-bit I2C I/O port expander with 2 configurable 8-bit ports, an interrupt-on-change output, and up to 1 MHz bus speed in a SOIC-24 package. It operates from 2.3 V to 5.5 V and supports up to 8 devices on the same I2C bus via address pins. Available from authorized distributors with worldwide shipping.
- Manufacturer
- ON Semiconductor
- Package
- Small Outline Packages
- Pin Count
- 24
- Lifecycle
- OBSOLETE
- Datasheet
- PCA9535EDWR2G Datasheet PDF
- Category
- Integrated Circuit
- Temp Range
- -55.0°C to 125.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 16-bit bidirectional I2C I/O expander with 2 independent 8-bit ports and interrupt-on-change output for low-overhead GPIO expansion
- Up to 1 MHz I2C clock speed with 3-bit address configuration supporting up to 8 devices on a single 2-wire bus
- 2.3 V to 5.5 V supply range in RoHS-compliant SOIC-24 package for flexible integration into 3.3 V and 5 V embedded systems
Applications
The PCA9535EDWR2G is ideal for expanding GPIO counts in IoT nodes, industrial PLCs, and embedded systems where I2C connectivity is already present and additional pins are needed without adding bus complexity. Its 16 configurable inputs or outputs and interrupt output reduce polling overhead, enabling efficient management of LED arrays, relay banks, and sensor enable signals. The device suits home automation gateways, industrial HMI panels, and robotics controllers where multiple GPIO-hungry peripherals share a 2-wire I2C bus.
Specifications
| Pbfree Code | Yes |
| Manufacturer Package Code | 0.0751 |
| YTEOL | 0 |
| Clock Frequency-Max | 1MHz |
| JESD-30 Code | R-PDSO-G24 |
| JESD-609 Code | e3 |
| Number of Bits | 16 |
| Number of I/O Lines | 16 |
| Number of Ports | 2 |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | SOP24,.4 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE |
| Peak Reflow Temperature (Cel) | 260 |
| Qualification Status | Not Qualified |
| Supply Voltage-Max | 5.5V |
| Supply Voltage-Min | 1.65V |
| Supply Voltage-Nom | 3V |
| Surface Mount | YES |
| Technology | CMOS |
| Temperature Grade | MILITARY |
| Terminal Finish | Matte Tin (Sn) - annealed |
| Terminal Form | GULL WING |
| Terminal Pitch | 1.27mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | 30 |
| uPs/uCs/Peripheral ICs Type | PARALLEL IO PORT, GENERAL PURPOSE |
| Package | Small Outline Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 3 |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.60 |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
How many I/O lines does PCA9535EDWR2G provide and how are they organized across ports?
The PCA9535EDWR2G provides 16 bidirectional I/O lines organized as 2 independent 8-bit ports, each individually configurable as an input or output over I2C at up to 1 MHz. This allows flexible GPIO expansion for microcontrollers in IoT gateways, industrial control panels, and embedded sensor platforms without adding parallel bus wiring.
What supply voltage range and maximum I2C speed does the PCA9535EDWR2G support in mixed-voltage systems?
The PCA9535EDWR2G operates from 2.3 V to 5.5 V, supporting both 3.3 V and 5 V microcontroller systems, and communicates at I2C speeds up to 1 MHz. Three address pins allow up to 8 PCA9535 devices on a single 2-wire bus, scaling total GPIO expansion to 128 outputs without requiring additional interface components.
How does the PCA9535EDWR2G interrupt output benefit embedded system firmware compared to continuous polling?
The interrupt-on-change output of the PCA9535EDWR2G signals the host MCU only when an input state changes, eliminating the need to poll 16 inputs at regular intervals over I2C. This reduces bus traffic and CPU overhead, freeing processor cycles for other tasks in industrial HMI panels, robotics controllers, and home automation gateways operating at 3.3 V or 5 V.
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