XRA1404 8-BIT SPI GPIO EXPANDER WITH INTEGRATED LEVEL SHIFTERS SEPTEMBER 2011 REV. 1.0.0 FEATURES GENERAL DESCRIPTION 1.65V to 3.6V operating voltage The XRA1404 is an 8-bit GPIO expander with an SPI interface. After power-up, the XRA1404 has internal Integrated level shifters 100K ohm pull-up resistors on each I/O pin that can 8 General Purpose I/Os (GPIOs) be individually enabled. 5V tolerant inputs In addition, the GPIOs on the XRA1404 can individually be controlled and configured. As outputs, Maximum stand-by current of 1uA at +1.8V the GPIOs can be outputs that are high, low or in SPI bus interface three-state mode. The three-state mode feature is useful for applications where the power is removed SPI Clock Frequency up to 26MHz from the remote devices, but they may still be Individually programmable inputs connected to the GPIO expander. Internal pull-up resistors As inputs, the internal pull-up resistors can be Polarity inversion enabled or disabled and the input polarity can be inverted. The interrupt can be programmed for Individual interrupt enable different behaviors. The interrupts can be Rising edge and/or Falling edge interrupt programmed to generate an interrupt on the rising Input filter edge, falling edge or on both edges. The interrupt can be cleared if the input changes back to its original Individually programmable outputs state or by reading the current state of the inputs. Output Level Control The XRA1404 is available in 16-pin QFN and 16-pin Output Three-State Control TSSOP packages. Open-drain active low interrupt output 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 XRA1404 8-BIT SPI GPIO EXPANDER WITH INTEGRATED LEVEL SHIFTERS REV. 1.0.0 FIGURE 1. XRA1404 BLOCK DIAGRAM VCCP VCC (1.65V 3.6V) (1.65V 3.6V) CS P0 P1 SCL P2 GPIO Integrated SI SPI Bus P3 Control GPIOs Level Interface P4 SO Registers Shifters P5 P6 P7 IRQ GND ORDERING INFORMATION NUMBER OF OPERATING TEMPERATURE PART NUMBER PACKAGE DEVICE STATUS GPIOS RANGE XRA1404IL16-F QFN-16 8 -40C to +85C Active XRA1404IL16TR-F QFN-16 8 -40C to +85C Active XRA1404IG16-F TSSOP-16 8 -40C to +85C Active XRA1404IG16TR-F TSSOP-16 8 -40C to +85C Active NOTE: TR = Tape and Reel, F = Green / RoHS FIGURE 2. PIN OUT ASSIGNMENTS - XRA1404 VCC 1 16 VCCP CS 2 15 SO 16 15 14 13 SCL 12 SI 1 SI 3 14 SCL 11 IRQ 2 P0 XRA1404 P0 4 13 IRQ XRA1404 16-Pin QFN 10 P7 3 16-Pin TSSOP P1 5 P1 12 P7 9 P6 P2 4 P2 6 11 P6 56 78 P3 7 10 P5 GND 8 9 P4 2 P3 CS GND VCC P4 VCCP P5 SO