The MAX7306/MAX7307 I2C-/SMBus?-compatible, serial-interfaced peripherals feature four level-translating I/Os and operate from a 1.62V to 3.6V power supply.
The MAX7307 features a port supply (VLA) that allows
level translation on I/O ports to operate from a separate
power supply from 1.4V to 5.5V. The MAX7306 features
an address select input (AD0) to allow up to four unique
slave addresses.
The MAX7306/MAX7307 ports P2, P3, and P4 can be
configured as inputs, push-pull outputs, and open-drain
outputs. Port P1 can be configured as a general-purpose
input, open-drain output, or an open-drain INT output.
Ports P2 and P3 can be configured as OSCIN and
OSCOUT, respectively. The MAX7306/MAX7307 include
an internal oscillator for PWM, blink, and key debounce,
or to cascade multiple MAX7306/MAX7307s. The external
clock can be used to set a specific PWM and blink
timing. The RST input asynchronously clears the 2-wire
interface and terminates a bus lockup involving the MAX7306/MAX7307.