MAX7306

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. All ports configured as output feature 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 1/8 second, 1/4 second, 1/2 second, 1, 2, 4, or 8 seconds. 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. Any port can blink during this period with a 1/16 to 15/16 duty cycle. The MAX7306/MAX7307 are specified over the -40°C to +125°C temperature range and are available in 10-pin DFN (2mm x 2mm)and 10-pin MAXpackages. The RST input asynchronously clears the 2-wire interface and terminates a bus lockup involving the MAX7306/MAX7307. 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 features of MAX7306 can be summarized as (1)1.4V to 5.5V I/O level translation port supply (VLA); (2)1.62V to 3.6V Power supply; (3)four individually configurable GPIO Ports P1 = Open-Drain I/O P2, P3, P4 = Push-Pull or open-drain I/O; (4)individual 33-Step PWM intensity control; (5)blink controls with 15 steps on outputs; (6)1kHz PWM period provides flicker-free LED intensity control; (7)25mA (max)port output sink current (100mA max Ground Current); (8)inputs overvoltage protected up to 5.5V (VLA); (9)transition detection with optional interrupt output; (10)optional input debouncing; (11)RST input clears serial interface, can restore power-up default state, and synchronizes blink timing; (12)oscillator input and output enables cascading multiple devices; (13)low 0.75A (typ)standby current.

The absolute maximum ratings of MAX7306 are (1)V DD: -0.3V to +4V; (2)VLA, SCL, SDA, AD0, and RST: -0.3V to +6V; (3)P1/INT, P2/OSCIN, P3/OSCOUT, and P4 MAX7306: -0.3V to (VDD + 0.3V)/ MAX7307: -0.3V to (VLA + 0.3V); (4)P1/INT, P2/OSCIN, P3/OSCOUT, and P4 sink current: 25mA; (5)P2/OSCIN, P3/OSCOUT, and P4 source current: 10mA; (6)SDA sink current : 10mA; (7)VDD current : 10mA; (8)VLA current (MAX7307): 30mA; (9)GND current : 100mA; (10)continuous power dissipation (TA = +70°C)10-Pin DFN (derate 5.0mW/°C over +70°C): 402mW/ 10-Pin MAX (derate 10.3mW/°C over +70°C): 825mW; (11)operating temperature range: -40°C to +125°C; (12)junction temperature: +150°C; (13)storage temperature range: -65°C to +150°C; (14)lead temperature (soldering, 10s): +300°C; (15)soldering temperature (reflow): +260°C.