XRA1403 16-BIT SPI GPIO EXPANDER WITH RESET INPUT SEPTEMBER 2011 REV. 1.0.0 FEATURES GENERAL DESCRIPTION 1.65V to 3.6V operating voltage The XRA1403 is an 16-bit GPIO expander with an SPI interface. After power-up, the XRA1403 has 16 General Purpose I/Os (GPIOs) internal 100K ohm pull-up resistors on each I/O pin 5V tolerant inputs that can be individually enabled. Maximum stand-by current of 1uA at +1.8V In addition, the GPIOs on the XRA1403 can individually be controlled and configured. As outputs, SPI bus interface the GPIOs can be outputs that are high, low or in SPI Clock Frequency up to 26MHz three-state mode. The three-state mode feature is useful for applications where the power is removed Individually programmable inputs from the remote devices, but they may still be Internal pull-up resistors connected to the GPIO expander. Polarity inversion As inputs, the internal pull-up resistors can be Individual interrupt enable enabled or disabled and the input polarity can be Rising edge and/or Falling edge interrupt inverted. The interrupt can be programmed for different behaviors. The interrupts can be Input filter programmed to generate an interrupt on the rising Individually programmable outputs edge, falling edge or on both edges. The interrupt Output Level Control can be cleared if the input changes back to its original state or by reading the current state of the inputs. Output Three-State Control The XRA1403 is available in 24-pin QFN and 24-pin Open-drain active low interrupt output TSSOP packages. Active-low reset input 3kV HBM ESD protection per JESD22-A114F 200mA latch-up performance per JESD78B APPLICATIONS Personal Digital Assistants (PDA) Cellular Phones/Data Devices Battery-Operated Devices Global Positioning System (GPS) Bluetooth Exar Corporation 48720 Kato Road, Fremont CA, 94538 (510) 668-7000 FAX (510) 668-7017 www.exar.com XRA1403 16-BIT SPI GPIO EXPANDER WITH RESET INPUT REV. 1.0.0 FIGURE 1. XRA1403 BLOCK DIAGRAM VCC (1.65V 3.6V ) P0 P1 P2 P3 GPIOs P4 P5 CS P6 P7 SCL GPIO SI SP I B us Control Interface SO Registers P8 RESET P9 IR Q P10 P11 GPIOs P12 P13 P14 P15 GND ORDERING INFORMATION NUMBER OF OPERATING TEMPERATURE PART NUMBER PACKAGE DEVICE STATUS GPIOS RANGE XRA1403IL24-F QFN-24 16 -40C to +85C Active XRA1403IL24TR-F QFN-24 16 -40C to +85C Active XRA1403IG24-F TSSOP-24 16 -40C to +85C Active XRA1403IG24TR-F TSSOP-24 16 -40C to +85C Active NOTE: TR = Tape and Reel, F = Green / RoHS FIGURE 2. PIN OUT ASSIGNMENTS VCC IRQ 1 24 SO SI 2 23 SCL RESET 3 22 CS P0 4 21 24 23 22 21 20 19 P0 1 18 CS P15 P1 5 20 P1 2 17 P15 XRA1403 6 P14 P2 19 XRA1403 24-Pin P2 16 P14 3 24-Pin QFN TSSOP P13 P3 7 18 P3 4 15 P13 5 14 P12 P4 P12 P4 8 17 P5 6 13 P11 P11 P5 16 9 7 8 9 101112 P10 P6 10 15 P9 P7 11 14 P8 GND 12 13 2 P6 RESET P7 SI GND IRQ P8 VCC P9 SO P10 SCL