MAX7320:I²C Port Expander with Eight Push-Pull Outputs

An Eight Push-Pull Output GPIO/LED Driver with an RST Input and Software Compatible with the MAX7324, MAX7325, MAX7326, and MAX7327 (16-Port GPIOs)

The MAX7320 2-wire serial-interfaced peripheral features eight push-pull outputs with selectable power-up logic states. The +5.5V tolerant active-low RST input clears the serial interface, terminating any I²C communication to or from the MAX7320. The MAX7320 uses two address inputs with four-level logic to allow 16 I²C slave addresses. The slave address also determines the power-up state level for the outputs in groups of four ports. The MAX7320 supports hot insertion. The serial interface SDA, SCL, AD0, AD2, and active-low RST remain high impedance in power-down (V+ = 0V) with up to +6V asserted on them. The MAX7320 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. The MAX7320 is available in 16-pin QSOP and 16-pin TQFN packages, and is specified over the automotive temperature range (-40°C to +125°C).

Key Features
  • 400kHz, +5.5V-Tolerant I²C Serial Interface
  • +1.71V to +5.5V Operating Voltage
  • Eight Push-Pull Output Ports with Selectable Power-Up Logic States
  • Active-Low RST Clears the Serial Interface, Terminating Any Serial Transaction to or from the MAX7320
  • AD0 and AD2 Inputs Select from 16 Slave Addresses
  • Low 0.6µA (typ) Standby Current
  • -40°C to +125°C Temperature Range
MAX7320: Typical Application Circuit
MAX7320: Typical Application Circuit
  • Cell Phones/PDAs
  • Notebooks
  • RAID
  • Satellite Radios
  • Servers
titleDownload file
MAX7320 Data SheetMAX7320.pdf
Part NumberInterfaceOutputsReset InputDrive Current
minmaxSee Notes
MAX7320Serial - I2C Compatible
Serial 2-Wire 400kbit
$1.19 @1k
Ordering Information
Part NumberStatusRecommended ReplacementPackageTempRoHS
MAX7320AEENo Longer AvailableMAX7320AEE+QSOP,;16 pin;30.9 mm²-40°C to +125°CNo
MAX7320AEE+ActiveQSOP,;16 pin;30.9 mm²-40°C to +125°CLead Free
MAX7320AEE+TActiveQSOP;-40°C to +125°CSee data sheet
MAX7320AEE-TNo Longer AvailableMAX7320AEE+TQSOP;16 pin-40°C to +125°CSee data sheet
MAX7320ATENo Longer AvailableMAX7320ATE+TQFN,;16 pin;9.6 mm²-40°C to +125°CNo
MAX7320ATE+ActiveTQFN,;16 pin;9.6 mm²-40°C to +125°CLead Free
MAX7320ATE+TActiveTQFN,;16 pin;9.6 mm²-40°C to +125°CLead Free
MAX7320ATE-TNo Longer AvailableMAX7320ATE+TQFN;16 pin-40°C to +125°CSee data sheet
MAX7320.pdf MAX7320
MAX7320_cn.pdf MAX7320