MAX6967

Voltage (with respect to GND)
V+.............................................................................-0.3V to +4V
SCLK, DIN, CS, DOUT/OSC.............................-0.3V to (V+ + 0.3V)
P_ .............................................................................-0.3V to +8V
DC Current into P_ ...............................................................24mA
DC Current into DOUT/OSC...................................................10mA
Total GND Current...............................................................280mA
Continuous Power Dissipation
16-Pin QSOP (derate 8.3mW/°C over T_A = +70°C)............667mW
16-Pin QFN (derate 14.7mW/°C over T_A = +70°C)...........1176mW
Operating Temperature Range (T_MIN to T_MAX).....-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.

The MAX6966/MAX6967 serial-interfaced peripherals provide microprocessors with 10 I/O ports rated to 7V. Each port of MAX6967 can be individually configured as either:

• A 20mA constant-current LED driver (static or pulse-
  width modulated (PWM)).
• A 10mA constant-current LED driver (static or PWM).
• An open-drain logic output.
• An overvoltage-protected Schmitt logic input.
  Analog and switching LED intensity control is built in:
• Individual 8-bit PWM control per output.
• Individual 1-bit analog control (half/full) per output.
• Global 3-bit analog control applies to all LED outputs.

PWM timing of the 10 port outputs may be optionally staggered, consecutively phased in 45°increments. This spreads the PWM load currents over time in eight steps, helping to even out the power-supply current and reduce the RMS current. The MAX6966/MAX6967 can be configured to awake from shutdown on receipt of a minimum 3ms pulse on the CS input. This hardware-wakeup feature allows a power-management controller or similar ASIC to enable the MAX6966/MAX6967 with preconfigured LED intensity settings.

Shutdown can be programmed to wait up to 4s, fade down the sink currents to zero for a period of 1/16s to 4s, and then shut down. A similar ramp-up from shutdown can be programmed for 1/16s to 4s. The MAX6966/MAX6967 support hot insertion. All port pins remain high impedance in power-down (V+ = 0V)with up to 8V asserted on them.

The DOUT/OSC pin can be configured as either the serial interface data output or optional PWM clock input. The MAX6966 powers up defaulting as DOUT output. The MAX6967 defaults as OSC input. For a similar part without the constant-current controls, refer to the MAX7317 data sheet.