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XRA1403 Dataheets PDF



Part Number XRA1403
Manufacturers Exar
Logo Exar
Description 16-BIT SPI GPIO EXPANDER
Datasheet XRA1403 DatasheetXRA1403 Datasheet (PDF)

XRA1403 16-BIT SPI GPIO EXPANDER WITH RESET INPUT SEPTEMBER 2011 REV. 1.0.0 GENERAL DESCRIPTION The XRA1403 is an 16-bit GPIO expander with an SPI interface. After power-up, the XRA1403 has internal 100K ohm pull-up resistors on each I/O pin that can be individually enabled. In addition, the GPIOs on the XRA1403 can individually be controlled and configured. As outputs, the GPIOs can be outputs that are high, low or in three-state mode. The three-state mode feature is useful for applications .

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XRA1403 16-BIT SPI GPIO EXPANDER WITH RESET INPUT SEPTEMBER 2011 REV. 1.0.0 GENERAL DESCRIPTION The XRA1403 is an 16-bit GPIO expander with an SPI interface. After power-up, the XRA1403 has internal 100K ohm pull-up resistors on each I/O pin that can be individually enabled. In addition, the GPIOs on the XRA1403 can individually be controlled and configured. As outputs, the GPIOs can be outputs that are high, low or in three-state mode. The three-state mode feature is useful for applications where the power is removed from the remote devices, but they may still be connected to the GPIO expander. As inputs, the internal pull-up resistors can be enabled or disabled and the input polarity can be inverted. The interrupt can be programmed for different behaviors. The interrupts can be programmed to generate an interrupt on the rising edge, falling edge or on both edges. The interrupt can be cleared if the input changes back to its original state or by reading the current state of the inputs. The XRA1403 is available in 24-pin QFN and 24-pin TSSOP packages. FEATURES • 1.65V to 3.6V operating voltage • 16 General Purpose I/Os (GPIOs) • 5V tolerant inputs • Maximum stand-by current of 1uA at +1.8V • SPI bus interface ■ SPI Clock Frequency up to 26MHz • Individually programmable inputs ■ Internal pull-up resistors ■ Polarity inversion ■ Individual interrupt enable ■ Rising edge and/or Falling edge interrupt ■ Input filter • Individually programmable outputs ■ Output Level Control ■ Output Three-State Control • 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 XRA1403 16-BIT SPI GPIO EXPANDER WITH RESET INPUT FIGURE 1. XRA1403 BLOCK DIAGRAM VCC (1.65V – 3.6V ) CS# SCL SI SO RESET# IR Q # SPI Bus In te rfa c e G P IO C ontrol R egisters GND REV. 1.0.0 G P IO s G P IO s P0 P1 P2 P3 P4 P5 P6 P7 P8 P9 P10 P11 P12 P13 P14 P15 ORDERING INFORMATION PART NUMBER XRA1403IL24-F XRA1403IL24TR-F XRA1403IG24-F XRA1403IG24TR-F PACKAGE QFN-24 QFN-24 TSSOP-24 TSSOP-24 NUMBER OF GPIOS 16 16 16 16 NOTE: TR = Tape and Reel, F = Green / RoHS OPERATING TEMPERATURE RANGE -40°C to +85°C -40°C to +85°C -40°C to +85°C -40°C to +85°C FIGURE 2. PIN OUT ASSIGNMENTS DEVICE STATUS Active Active Active Active P6 P7 GND P8 P9 P10 RESET# SI IRQ# VCC SO SCL 24 23 22 21 20 19 P0 1 18 CS# P1 2 17 P15 P2 3 P3 4 XRA1403 24-Pin QFN 16 P14 15 P13 P4 5 14 P12 P5 6 13 P11 7 8 9 10 11 12 IRQ# 1 SI 2 RESET# 3 P0 4 P1 5 P2 6 P3 7 P4 8 P5 9 P6 10 P7 11 GND 12 XRA1403 24-Pin TSSOP 24 VCC 23 SO 22 SCL 21 CS# 20 P15 19 P14 18 P13 17 P12 16 P11 15 P10 14 P9 13 P8 2 REV. 1.0.0 PIN DESCRIPTIONS XRA1403 16-BIT SPI GPI.


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