MAX7325
I2C Port Expander with 8 Push-Pull and 8 Open-Drain I/Os
Low Operating Supply Voltage I2C Port Expander with 8 Push-Pull and 8 Configurable Open-Drain I/Os
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Overview
Features and Benefits
- 400kHz I2C Serial Interface
- +1.71V to +5.5V Operating Voltage
- 8 Push-Pull Output Ports
- 8 Open-Drain I/O Ports, Rated at 20mA Sink Current
- I/O Ports are Overvoltage Protected to +6V
- Selectable I/O Port Power-Up Default Logic States
- Transient Changes are Latched, Allowing Detection Between Read Operations
- Active-Low INT Output Alerts Changes on Inputs
- AD0 and AD2 Inputs Select from 16 Slave Addresses
- Low 0.6µA (typ) Standby Current
- -40°C to +125°C Temperature Range
Product Details
The MAX7325 2-wire serial-interfaced peripheral features 16 I/O ports. Ports are divided into eight push-pull outputs and eight I/Os with selectable internal pullups and transition detection. Eight ports are push-pull outputs and eight I/Os may be used as a logic input or an open-drain output. Ports are overvoltage protected to +6V.
All I/O ports configured as inputs are continuously monitored for state changes (transition detection). State changes are indicated by the active-low INT output. The interrupt is latched, allowing detection of transient changes. When the MAX7325 is subsequently accessed through the serial interface, any pending interrupt is cleared. The open-drain outputs are rated to sink 20mA, and are capable of driving LEDs. The active-low RST input clears the serial interface, terminating any I2C communication to or from the MAX7325.
The MAX7325 uses two address inputs with four-level logic to allow 16 I2C slave addresses. The slave address also determines the power-up logic state for the I/O ports, and enables or disables internal 40kΩ pullups in groups of four ports.
The MAX7325 is one device in a family of pin-compatible port expanders with a choice of input ports, open-drain I/O ports, and push-pull output ports (see Table 1 of the full data sheet).
The MAX7325 is available in 24-pin QSOP and TQFN packages and is specified over the -40°C to +125°C automotive temperature range.
Applications
- Automotive
- Cell Phones
- Notebooks
- SAN/NAS
- Satellite Radio
- Servers
Product Lifecycle
Production
At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.
Evaluation Kits (2)
Documentation & Resources
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Design Resources
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal.View our quality and reliability program and certifications for more information.
| Part Number | Material Declaration | Reliability Data | Pin/Package Drawing | CAD Symbols, Footprints & 3D Models |
|---|---|---|---|---|
| MAX7325AEG+ | Material Declaration | Reliability Data | 24-QSOP-150_MIL | |
| MAX7325AEG+T | Material Declaration | Reliability Data | 24-QSOP-150_MIL | |
| MAX7325AEG/V+ | Material Declaration | Reliability Data | 24-QSOP-150_MIL | |
| MAX7325AEG/V+T | Material Declaration | Reliability Data | 24-QSOP-150_MIL | |
| MAX7325ATG+ | Material Declaration | Reliability Data | 24-LFCSP-4X4X0.75 | |
| MAX7325ATG+T | Material Declaration | Reliability Data | 24-LFCSP-4X4X0.75 | |
| Wafer Fabrication Data |
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Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.