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XRA1206IG16TR-F Datasheet(PDF) 1 Page - Exar Corporation |
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XRA1206IG16TR-F Datasheet(HTML) 1 Page - Exar Corporation |
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1 / 15 page  Exar Corporation 48720 Kato Road, Fremont CA, 94538 • (510) 668-7000 • FAX (510) 668-7017 • www.exar.com XRA1206 8-BIT I2C/SMBUS GPIO EXPANDER WITH INTEGRATED LEVEL SHIFTERS SEPTEMBER 2011 REV. 1.0.0 GENERAL DESCRIPTION The XRA1206 is an 8-bit GPIO expander with an I2C/ SMBus interface. After power-up, the XRA1206 has internal 100K ohm pull-up resistors on each I/O pin that can be individually enabled. In addition, the GPIOs on the XRA1206 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 XRA1206 is an enhanced version of the TCA6408. The XRA1206 is pin and software compatible with the TCA6408. The XRA1206 is available in 16-pin QFN and 16-pin TSSOP packages. FEATURES • 1.65V to 3.6V operating voltage • Integrated level shifters • 8 General Purpose I/Os (GPIOs) • 5V tolerant inputs • Maximum stand-by current of 1uA at +1.8V • I2C/SMBus bus interface ■ I 2C clock frequency up to 400kHz ■ Noise filter on SDA and SCL inputs ■ Up to 4 I 2C Slave Addresses • 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 • Pin and software compatible with TCA6408 • 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 |
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