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MAX7325

Maxim Integrated Products
Part Number MAX7325
Manufacturer Maxim Integrated Products
Description I2C Port Expander
Published Nov 8, 2006
Detailed Description MAX7325 EVALUATION KIT AVAILABLE I2C Port Expander with 8 Push-Pull and 8 Open-Drain I/Os General Description The MAX7...
Datasheet PDF File MAX7325 PDF File

MAX7325
MAX7325

Overview
MAX7325 EVALUATION KIT AVAILABLE I2C Port Expander with 8 Push-Pull and 8 Open-Drain I/Os General Description 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 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 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).
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 ●● Cell Phones ●● SAN/NAS ●● Servers ●● Notebooks ●● Satellite Radio ●● Automotive P0 AD0 P1 O15 P2 O14 P3 O13 P4 O12 P5 O11 Pin Configurations TOP VIEW 18 17 16 15 14 13 SCL 19 12 O10 SDA 20 11 O9 V+ 21 INT 22 MAX7325 10 O8 9 GND RST 23 EXPOSED PADDLE AD2 24 + 12 3456 8 P7 7 P6 TQFN (4mm x 4mm) Pin Configurations continued at end of data sheet.
Benefits and Features ●● 400kHz I2C Serial Interface ●● +1.
71V to +5.
5V Operation ●● 8 Push-Pull Outputs ●● 8 Open-Drain I/O Ports, Rat...


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