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General Description
The IP403 is a dual-functional controller chip, the serial-to-parallel LED driver and GPIO controller. The serial-to-parallel LED driver can replace up to 7 74LV164 glue logic chips.
The GPIO controller is similar to the commonly used 8255 I/O controller. Furthermore IP403 provides the programmable input stable timer, allowing the designer to set the input de-bounce time. IP403 also provides the flexibility for the designer to program the interrupt source of individual input change.
When set to LED driver mode, IP403 can directly drive 56 LEDs or 48 LEDs, depending on either single serial input or triple serial input. If set to single serial input mode, all LED driver pins are linked internally with the internal shift registers. If set to triple serial input mode, each serial input corresponds to 16 LED driver pins, meaning that 48 LEDs driver pins in total. In GPIO mode provide 52 GPIO.
Application
Serial-to-parallel L ED D river
- High port count switch LED driver
m Bi-color or mono-color LE D driver
Static (non-scan method)7 digit 7-segment LED driver
LED matrix driver
General Purpose Input Output(GPIO)
- Factory/Office security system
- Keyboard scanning
- LED display board control
- Ethernet I/O

Features
●Supports serial- to- parallel dual LED driver and GPIO controller
●Serial- to- parallel LED Driver
- Support one serial input with 56 parallel LED s or triple serial input with 16 parallel LED s for each serial input.
- Support 4~16mA adjustable current source driving without current- limiting resistor
- Support LED off mode for power saving function
- provides cascade ability to provide more LED driver outputs.
- Support 1.8V to 3.3V logic level at the serial input stage
- Single 3.3V supply voltage for core and LED driver
●General Purpose Input Output (GPIO)
- Can be accessed by 2 wire serial interface
- Provide 52 General Purpose inputs or outputs
- Provide adjustable Input stable interval for input de- bouncing function
- provides up to 4 device ID
- provides interrupt for input change
- provides interrupt mask for each input
- System clock input up to 25MHz
●0.35 um process
●68 pin QFN with E- pad 8x8mm package
●Single 3.3V power source