EVALUATION KIT AVAILABLE
MAX7320
I2C Port Expander with Eight Push-Pull Outputs
General Description
The MAX7320 2-wire serial-interfaced peripheral features
eight push-pull outputs with selectable power-up logic
states.
The +5.5V tolerant 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 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 (see Table 1).
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).
Benefits and Features
●● 400kHz, +5.5V-Tolerant I2C Serial Interface
●● +1.71V to +5.5V Operating Voltage
●● Eight Push-Pull Output Ports with Selectable PowerUp Logic States
●● 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
Ordering Information
PINPACKAGE
PART
TEMP RANGE
MAX7320AEE+
-40°C to +125°C
16 QSOP
MAX7320ATE+
-40°C to +125°C
16 TQFN
3mm x 3mm x
0.8mm
TOP
MARK
—
ADB
+Denotes a lead(Pb)-free/RoHS-compliant package.
Applications
●● Cell Phones/PDAs
●● Satellite Radios
●● Notebooks
●● RAID
●● Servers
Pin Configurations, Typical Application Circuit, and
Functional Diagram appear at end of data sheet.
Selector Guide
PART
INPUTS
INTERRUPT MASK
OPEN-DRAIN OUTPUTS
PUSH-PULL OUTPUTS
MAX7319
8
Yes
—
—
MAX7320
—
—
—
8
MAX7321
Up to 8
—
Up to 8
—
MAX7322
4
Yes
—
4
MAX7323
Up to 4
—
Up to 4
MAX7328*
MAX7329**
Up to 8
*Second source to PCF8574.
**Second source to PCF8574A.
19-3879; Rev 1; 4/15
—
—
Up to 8
4
—
—
