The MAX7316 I²C/SMBus™-compatible serial interfaced
peripheral provides microprocessors with eight additional
I/O ports plus one output-only port and one input-only
port. Each I/O port can be individually configured as
either an open-drain current-sinking output rated to 50mA
at 5.5V or as a logic input with transition detection. The
output-only port can also be assigned as an interrupt output
for transition detection. The outputs are capable of
driving LEDs, or can provide logic outputs with external
resistive pullup up to 5.5V.
Eight-bit PWM current control is available for all nine output
ports. Four bits are global control and apply to all LED
outputs to provide coarse adjustment of current from fully
off to fully on in 14 intensity steps. Additionaly each output
then has individual 4-bit control, which further divides the
globally set current into 16 more steps. Alternatively, the
current control can be configured as a single 8-bit control
that sets all outputs at once.
Each output has independent blink timing with two blink
phases. LEDs can be individually set to be on or off during
either blink phase or to ignore the blink control. The
blink period is controlled by an external clock input (up to
1kHz) on BLINK or by a register. The BLINK input can
also be used as a logic control to turn the LEDs on and
off, or as a general-purpose input.
The MAX7316 supports hot insertion. All port pins, the
INT-bar output, SDA, SCL, RST-bar, BLINK, and the slave
address input ADO remain high impedance in powerdown
(V+ = 0V) with up to 6V asserted upon them.
The MAX7316 is controlled through a 2-wire serial interface,
and can be set to one of four I²C addresses.
Key Features
Applications/Uses
400kbps, 2-Wire Serial Interface, 5.5V Tolerant
2V to 3.6V Operation
Overall 8-Bit PWM LED Intensity Control
Global 16-Step Intensity Control
Plus Individual 16-Step Intensity Controls
2-Phase LED Blinking
High Output Current (50mA max per Port)
Supports Hot Insertion
Outputs are 5.5V-Rated Open Drain
Inputs are Overvoltage Protected to 5.5V
Transition Detection with Interrupt Output
RST-bar Input Clears Serial Interface and Restores Power-Up Default State
Notes: **This pricing is BUDGETARY, for comparing similar parts. Prices are in
U.S. dollars and subject to change. Quantity pricing may vary
substantially and international prices may differ due to local
duties, taxes, fees, and exchange rates. For volume-specific prices
and delivery, please see the price and availability page
or contact an authorized distributor.
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