GENERAL DESCRIPTION

The SX1501, SX1502 and SX1503 are complete ultra low voltage General Purpose parallel Input/Output (GPIO) expanders ideal for low power handheld battery powered equipment. They allow easy serial expansion of I/O through a standard I2C interface. GPIO devices can provide additional control and monitoring when the microcontroller or chipset has insufficient I/O ports, or in systems where serial communication and control from a remote location is advantageous.

KEY PRODUCT FEATURES

• 4/8/16 channel of I/Os

◾ True bi-directional style I/O

◾ Programmable Pull-up/Pull-down

◾ Push/Pull outputs

• 1.2V to 5.5V independent operating voltage for all supply rails (VDDM, VCC1, VCC2)

• 5.5V compatible I/Os, up to 24mA output sink (no total sink current limit)

• Fully programmable logic functions (PLD)

• 400kHz 2-wire I2C compatible slave interface

• Open drain active low interrupt output (NINT)

◾ Bit maskable

◾ Programmable edge sensitivity

• Power-On Reset and reset input (NRESET)

• Ultra low current consumption of typ. 1uA

• -40°C to +85°C operating temperature range

• Ultra-Thin 3x3mm QFN-UT-20 and TSSOP-20 packages (SX1501/SX1502)

• Ultra-Thin 4x4mm QFN-UT-28 and TSSOP-28 packages (SX1503)

TYPICAL APPLICATIONS

• Cell phones, PDAs, MP3 players

• Digital camera

• Portable multimedia player

• Notebooks

• GPS Units

• Industrial, ATE

• Any battery powered equipment