XRA1203 16-BIT I2C/SMBUS GPIO EXPANDER WITH RESET SEPTEMBER 2011 REV. 1.0.0 FEATURES GENERAL DESCRIPTION 1.65V to 3.6V operating voltage 2 The XRA1203 is a 16-bit GPIO expander with an I C/ SMBus interface. After power-up, the XRA1203 has 16 General Purpose I/Os (GPIOs) internal 100K ohm pull-up resistors on each I/O pin 5V tolerant inputs that can be individually enabled. Maximum stand-by current of 1uA at +1.8V In addition, the GPIOs on the XRA1203 can 2 individually be controlled and configured. As outputs, I C/SMBus bus interface the GPIOs can be outputs that are high, low or in 2 I C clock frequency up to 400kHz three-state mode. The three-state mode feature is useful for applications where the power is removed Noise filter on SDA and SCL inputs from the remote devices, but they may still be 2 Up to 16 I C Slave Addresses connected to the GPIO expander. Individually programmable inputs As inputs, the internal pull-up resistors can be Internal pull-up resistors enabled or disabled and the input polarity can be inverted. The interrupt can be programmed for Polarity inversion different behaviors. The interrupts can be Individual interrupt enable programmed to generate an interrupt on the rising Rising edge and/or Falling edge interrupt edge, falling edge or on both edges. The interrupt Input filter can be cleared if the input changes back to its original state or by reading the current state of the inputs. Individually programmable outputs The XRA1203 is an enhanced version of the Output Level Control PCA9539 and TCA9539. The XRA1203 is pin and Output Three-State Control software compatible with the PCA9539 and TCA9539 Open-drain active low interrupt output (note: software registers are compatible to the 2 PCA9539, but the I C slave address is different). Active-low reset input The XRA1203 is available in 24-pin QFN and 24-pin Pin and software compatible with PCA9539 and TSSOP packages. TCA9539 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 XRA1203 16-BIT I2C/SMBUS GPIO EXPANDER WITH RESET REV. 1.0.0 FIGURE 1. XRA1203 BLOCK DIAGRAM VCC (1.65V 3.6V) P0 P1 P2 P3 GPIOs P4 P5 SCL P6 SDA P7 2 I C/ GPIO A1 SMBus Control A0 Interface Registers P8 RESET P9 IRQ P10 P11 GPIOs P12 P13 P14 P15 GND ORDERING INFORMATION NUMBER OF OPERATING TEMPERATURE PART NUMBER PACKAGE DEVICE STATUS GPIOS RANGE XRA1203IL24-F QFN-24 16 -40C to +85C Active XRA1203IL24TR-F QFN-24 16 -40C to +85C Active XRA1203IG24-F TSSOP-24 16 -40C to +85C Active XRA1203IG24TR-F TSSOP-24 16 -40C to +85C Active NOTE: TR = Tape and Reel, F = Green / RoHS FIGURE 2. PIN OUT ASSIGNMENTS VCC IRQ 1 24 SDA A1 2 23 SCL RESET 3 22 24 23 22 21 20 19 A0 P0 4 21 P0 1 18 A0 P15 P1 5 20 P1 2 17 P15 XRA1203 XRA1203 P14 P2 3 16 P14 P2 6 19 24-Pin 24-Pin QFN P3 4 15 P13 TSSOP P13 P3 7 18 P12 P4 5 14 P4 17 P12 8 P5 6 13 P11 78 9101112 P11 P5 9 16 P10 P6 10 15 P9 P7 11 14 P8 GND 12 13 2 P6 RESET P7 A1 GND IRQ P8 VCC P9 SDA P10 SCL