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XRA1202P Datasheet(PDF) 1 Page - Exar Corporation |
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XRA1202P Datasheet(HTML) 1 Page - Exar Corporation |
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1 / 16 page  Exar Corporation 48720 Kato Road, Fremont CA, 94538 • (510) 668-7000 • FAX (510) 668-7017 • www.exar.com XRA1202/1202P 8-BIT I2C/SMBUS GPIO EXPANDER WITH RESET APRIL 2013 REV. 1.0.1 GENERAL DESCRIPTION The XRA1202/1202P is an 8-bit GPIO expander with an I2C/SMBus interface. After power-up, the XRA1202 has internal 100K ohm pull-up resistors on each I/O pin that can be individually enabled. The XRA1202P has the internal pull-up resistors enabled upon power-up in case it is necessary for the inputs to be in a known state. In addition, the GPIOs on the XRA1202/1202P 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 XRA1202/1202P are enhanced versions of the PCA9538. The XRA1202 is pin and software compatible with the PCA9538 (note: software registers are compatible to the PCA9538, but the I2C slave address is different). The XRA1202 is available in 16-pin QFN and 16-pin TSSOP packages. The XRA1202P is available in the 16-pin QFN package. FEATURES • 1.65V to 3.6V operating voltage • 8 General Purpose I/Os (GPIOs) • 5V tolerant inputs • Maximum stand-by current of 1uA at +1.8V • I2C/SMBus bus interface s I2C clock frequency up to 400kHz s Noise filter on SDA and SCL inputs s Up to 16 I2C Slave Addresses • Individually programmable inputs s Internal pull-up resistors s Polarity inversion s Individual interrupt enable s Rising edge and/or Falling edge interrupt s Input filter • Individually programmable outputs s Output Level Control s Output Three-State Control • Open-drain active low interrupt output • Active-low reset input • Pin and software compatible with PCA9538 • 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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