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

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.

Key Features
  • 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
MAX7325: Functional Diagram
MAX7325: Functional Diagram
  • Automotive
  • Cell Phones
  • Notebooks
  • Satellite Radio
  • Servers
titleDownload file
MAX7325 Data SheetMAX7325.pdf
Part NumberInterfaceI/OReset InputInterr.OutOver Voltage Protection
Drive Current
minmaxSee Notes
MAX7325Serial - I2C Compatible
Serial 2-Wire 400kbit
$1.12 @1k
Design kits & evaluation modules
Related Products
  • MAX7323:I²C Port Expander with 4 Push-Pull Outputs and 4 Open-Drain I/Os
  • MAX7326:I²C Port Expander with 12 Push-Pull Outputs and Four Inputs
  • MAX7324:I²C Port Expander with Eight Push-Pull Outputs and Eight Inputs
  • MAX7322:I²C Port Expander with 4 Push-Pull Outputs and 4 Inputs
  • MAX7327:I²C Port Expander with 12 Push-Pull Outputs and 4 Open-Drain I/Os
  • MAX7320:I²C Port Expander with Eight Push-Pull Outputs
  • MAX7328:I²C Port Expanders with Eight I/O Ports
  • MAX7329:I²C Port Expanders with Eight I/O Ports
  • MAX7319:I²C Port Expander with Eight Inputs and Maskable Transition Detection
  • MAX7321:I2C Port Expander with 8 Open-Drain I/Os
Ordering Information
Part NumberStatusRecommended ReplacementPackageTempRoHS
MAX7325AEGNo Longer AvailableMAX7325AEG+QSOP,;24 pin;54.2 mm²-40°C to +125°CNo
MAX7325AEG+ActiveQSOP,;24 pin;54.2 mm²-40°C to +125°CLead Free
MAX7325AEG+TActiveQSOP,;24 pin;54.2 mm²-40°C to +125°CLead Free
MAX7325AEG-TNo Longer AvailableMAX7325AEG+TQSOP,;24 pin;54.2 mm²-40°C to +125°CNo
MAX7325AEG/V+NRNDQSOP,;24 pin;54.2 mm²-40°C to +125°CLead Free
MAX7325AEG/V+TNRNDQSOP,;24 pin;54.2 mm²-40°C to +125°CLead Free
MAX7325ATGNo Longer AvailableMAX7325ATG+TQFN,;24 pin;16.8 mm²-40°C to +125°CNo
MAX7325ATG+ActiveTQFN,;24 pin;16.8 mm²-40°C to +125°CLead Free
MAX7325ATG+TActiveTQFN,;24 pin;16.8 mm²-40°C to +125°CLead Free
MAX7325ATG-TNo Longer AvailableMAX7325ATG+TQFN;24 pin-40°C to +125°CSee data sheet
MAX7325.pdf MAX7325
MAX7325_cn.pdf MAX7325