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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 Applications/Uses Cell Phones/PDAs Notebooks RAID Satellite Radios Servers

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