The MAX7302 I²C-/SMBus™-compatible, serial-interfaced peripheral features 9 level-translating I/Os, and operates from a 1.62V to 3.6V power supply. The MAX7302 features a port supply VLA that allows level-translation on I/O ports to operate from a separate power supply from 1.62V to 5.5V. An address select input, AD0, allows up to four unique slave addresses for the device.
The MAX7302 ports P2–P9 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–P9 can be configured as OSCIN and OSCOUT, respectively. Ports P2–P9 can also be used as configurable logic arrays (CLAs) to form user-defined logic gates, replacing external discrete gates. Outputs are capable of sinking up to 25mA, and sourcing up to 10mA when configured as push-pull outputs.
The MAX7302 includes an internal oscillator for PWM, blink, and key debounce, or to cascade multiple MAX7302s. The external clock can be used to set a specific PWM and blink timing. The active-low RST input asynchronously clears the 2-wire interface and terminates a bus lockup involving the MAX7302.
All ports configured as an output feature a 33-step PWM, allowing any output to be set from fully off, 1/32 to 31/32 duty cycle, to fully on. All output ports also feature LED blink control, allowing blink periods of 1/8s, 1/4s, 1/2s, 1s, 2s, 4s, or 8s. Any port can blink during this period with a 1/16 to 15/16 duty cycle.
The MAX7302 is specified over the -40°C to +125°C temperature range and is available in 16-pin QSOP and 16-pin TQFN (3mm x 3mm) packages.
Applications
- Cell Phones
- LCD/Keypad Backlights
- LED Status Indicators
- Servers
- System I/O Ports
