XRA1405 16-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 XRA1405 is an 16-bit GPIO expander with an SPI interface. After power-up, the XRA1405 has 16 General Purpose I/Os (GPIOs) internal 100K ohm pull-up resistors on each I/O pin Integrated Level Shifters that can be individually enabled. 5V tolerant inputs In addition, the GPIOs on the XRA1405 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 XRA1405 is available in 24-pin QFN and 24-pin Output Three-State Control TSSOP packages. Open-drain active low interrupt output 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 XRA1405 16-BIT SPI GPIO EXPANDER WITH INTEGRATED LEVEL SHIFTERS REV. 1.0.0 FIGURE 1. XRA1405 BLOCK DIAGRAM VC C P (1.65V 3.6V ) VC C (1.65 V 3.6V ) P0 P1 P2 P3 GPIO s P4 P5 CS P6 P7 SC L GPIO Integrated SI SPI Bu s C ontrol Level In te rfa ce SO R egisters Shifters P8 P9 IR Q P10 P11 GPIO s P12 P13 P14 P15 GND ORDERING INFORMATION NUMBER OF OPERATING TEMPERATURE PART NUMBER PACKAGE DEVICE STATUS GPIOS RANGE XRA1405IL24-F QFN-24 16 -40C to +85C Active XRA1405IL24TR-F QFN-24 16 -40C to +85C Active XRA1405IG24-F TSSOP-24 16 -40C to +85C Active XRA1405IG24TR-F TSSOP-24 16 -40C to +85C Active NOTE: TR = Tape and Reel, F = Green / RoHS FIGURE 2. PIN OUT ASSIGNMENTS IRQ 1 24 VCCP VCC 2 23 SO SI 3 22 SCL 24 23 22 21 20 19 P0 4 21 CS P0 1 18 CS 5 P1 20 P15 P1 2 17 P15 XRA1405 XRA1405 P2 3 16 P14 6 P2 19 P14 24-Pin 24-Pin QFN P3 4 15 P13 TSSOP P3 7 18 P13 5 14 P12 P4 P4 8 17 P12 P11 P5 6 13 78 9101112 P5 16 9 P11 10 15 P6 P10 P7 11 14 P9 GND 12 13 P8 2 P6 SI P7 VCC GND IRQ P8 VCCP P9 SO P10 SCL