XRA1201/1201P 16-BIT I2C/SMBUS GPIO EXPANDER SEPTEMBER 2011 REV. 1.0.0 FEATURES GENERAL DESCRIPTION 1.65V to 3.6V operating voltage The XRA1201/1201P is a 16-bit GPIO expander with 2 an IC/SMBus interface. After power-up, the 16 General Purpose I/Os (GPIOs) XRA1201 has internal 100K ohm pull-up resistors on 5V tolerant inputs each I/O pin that can be individually enabled. The XRA1201P has the internal pull-up resistors enabled Maximum stand-by current of 1uA at +1.8V upon power-up in case it is necessary for the inputs 2 I C/SMBus bus interface to be in a known state. 2 I C clock frequency up to 400kHz In addition, the GPIOs on the XRA1201/1201P can individually be controlled and configured. As outputs, Noise filter on SDA and SCL inputs the GPIOs can be outputs that are high, low or in 2 Up to 32 I C Slave Addresses three-state mode. The three-state mode feature is Individually programmable inputs useful for applications where the power is removed from the remote devices, but they may still be Internal pull-up resistors connected to the GPIO expander. Polarity inversion As inputs, the internal pull-up resistors can be Individual interrupt enable enabled or disabled and the input polarity can be Rising edge and/or Falling edge interrupt inverted. The interrupt can be programmed for Input filter different behaviors. The interrupts can be programmed to generate an interrupt on the rising Individually programmable outputs edge, falling edge or on both edges. The interrupt Output Level Control can be cleared if the input changes back to its original Output Three-State Control state or by reading the current state of the inputs. Open-drain active low interrupt output The XRA1201/1201P are enhanced versions of other 2 16-bit GPIO expanders with an I C/SMBus interface. Pin and software compatible with PCA9535, The XRA1201 is pin and software compatible with the TCA9535, MAX7312 (XRA1201) PCA9535, TCA9535 and MAX7312. The XRA1201P Pin and software compatible with CAT9555, is pin and software compatible with the CAT9555, PCA9555, TCA9555, MAX7311 and MAX7318 PCA9555, TCA9555, MAX7311 and MAX7318. (XRA1201P) The XRA1201/1201P are available in 24-pin QFN 3kV HBM ESD protection per JESD22-A114F and 24-pin TSSOP packages. 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 XRA1201/1201P 16-BIT I2C/SMBUS GPIO EXPANDER REV. 1.0.0 FIGURE 1. XRA1201 BLOCK DIAGRAM VCC (1.65V 3.6V) P0 P1 P2 P3 GPIOs P4 P5 SCL P6 SDA P7 2 I C/ GPIO A2 SMBus Control A1 Interface Registers A0 P8 P9 IRQ P10 P11 GPIOs P12 P13 P14 P15 GND ORDERING INFORMATION NUMBER OF OPERATING TEMPERATURE PART NUMBER PACKAGE DEVICE STATUS GPIOS RANGE XRA1201IL24-F QFN-24 16 -40C to +85C Active XRA1201IL24TR-F QFN-24 16 -40C to +85C Active XRA1201PIL24-F QFN-24 16 -40C to +85C Active XRA1201PIL24TR-F QFN-24 16 -40C to +85C Active XRA1201IG24-F TSSOP-24 16 -40C to +85C Active XRA1201IG24TR-F TSSOP-24 16 -40C to +85C Active XRA1201PIG24-F TSSOP-24 16 -40C to +85C Active XRA1201PIG24TR-F TSSOP-24 16 -40C to +85C Active NOTE: TR = Tape and Reel, F = Green / RoHS FIGURE 2. PIN OUT ASSIGNMENTS IRQ 1 24 VCC A1 2 23 SDA SCL A2 3 22 24 23 22 21 20 19 P0 4 21 A0 P0 1 18 A0 P1 5 20 P15 P1 2 17 P15 XRA1201/ XRA1201/ XRA1201P P2 3 16 P14 P2 6 19 P14 XRA1201P 24-Pin 24-Pin QFN P3 4 15 P13 P3 7 18 P13 TSSOP P12 P4 5 14 P4 8 17 P12 P5 6 13 P11 78 9101112 P5 16 P11 9 P6 10 15 P10 P7 11 14 P9 GND 12 13 P8 2 P6 A2 P7 A1 GND IRQ P8 VCC P9 SDA P10 SCL