Features: ` 400kbps I2C-Compatible Serial Interface
` 2V to 5.5V Operation
` 5.5V Overvoltage-Tolerant I/Os
` Supports Hot Insertion
` 16 I/O Pins that Default to Inputs on Power-Up
` 100k Pullup on Each I/O
` Open-Drain Interrupt Output (INT)
` Noise Filter on SCL/SDA Inputs
` 64 Slave ID Addresses Available
` Low Standby Current (5.4A typ)
` Polarity Inversion
` 4mm * 4mm, 0.8mm Thin QFN Package
` -40°C to +125°C OperationApplication·Servers
·RAID Systems
·Industrial Control
·Medical Equipment
·PLCs
·Instrumentation and Test MeasurementPinout
SpecificationsV+ to GND ...................................................................-0.3V to +6V
I/O0I/O15 as Inputs .....................................(GND - 0.3V) to +6V
SCL, SDA, AD0, AD1, AD2, INT..........................(GND - 0.3V) to +6V
Maximum V+ Current..........................................................+250mA
Maximum GND Current .......................................................-250mA
DC Input Current on I/O0I/O15 .......................................±20mA
DC Output Current on I/O0I/O15 .....................................±80mA
Continuous Power Dissipation (TA = +70°C)
24-Pin Wide SO (derate 11.8mW/°C above +70°C) ..........941mW
24-Pin SSOP (derate 8.0mW/°C above +70°C) .................640mW
24-Pin TSSOP (derate 12.2mW/°C above +70°C) ..............976mW
24-Pin Thin QFN (derate 20.8mW/°C above +70°C) .........1667mW
Operating Temperature Range ............................-40°C to +125°C
Junction Temperature...........................................................+150°C
Storage Temperature Range ................................-65°C to +150°C
Lead Temperature (soldering, 10s) .......................................+300°C
Stresses beyond those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.
DescriptionThe MAX7318 2-wire-interfaced expander provides 16- bit parallel input/output (I/O) port expansion for SMBus™ and I2C™ applications. The MAX7318 consists of input port registers, output port registers, polarity inversion registers, configuration registers, a bus timeout register, and an I2C-compatible serial interface logic compatible with SMBus. The system master can invert the MAX7318 input data by writing to the activehigh polarity inversion register.
Any of the 16 I/O ports of MAX7318 can be configured as an input or output. A power-on reset (POR) initializes the 16 I/Os as inputs. Three address select pins configure one of 64 slave ID addresses.
The MAX7318 supports hot insertion. All port pins, the INT output, SDA, SCL, and the slave address inputs AD02 remain high impedance in power-down (V+ = 0V) with up to 6V asserted upon them.
The MAX7318 is available in 24-pin SO, SSOP, TSSOP, and thin QFN packages and is specified over the -40°C to +125°C automotive temperature range.
For applications requiring an SMBus timeout function, refer to the MAX7311 data sheet.
MAX7318 Data Sheet
