MAX7310 19-2698 Rev 3 2/05 2-Wire-Interfaced 8-Bit I/O Port Expander with Reset General Description Features The MAX7310 provides 8-bit parallel input/output port 400kHz 2-Wire Interface 2 expansion for SMBus-compatible and I C-compatible 2.3V to 5.5V Operation applications. The MAX7310 consists of an input port register, an output port register, a polarity inversion reg- Low Standby Current (1.7A typ) ister, a configuration register, a bus timeout register, 2 Bus Timeout for Lock-Up-Free Operation and an SMBus/I C-compatible serial interface. The sys- tem master can invert the MAX7310 input data by writ- 56 Slave ID Addresses ing to the active-high polarity inversion register. The Polarity Inversion system master can enable or disable bus timeout by writing to the bus timeout register. Eight I/O Pins that Default to Inputs on Power-Up Any of the eight I/O ports may be configured as input or 5V Tolerant Open-Drain Output on I/O0 output. An active-low reset input sets the eight I/Os as inputs. Three address select pins configure one of 56 4mm x 4mm, 0.8mm Thin QFN Package slave ID addresses. -40C to +125C Operation The MAX7310 is available in 16-pin thin QFN, TSSOP, and QSOP packages and is specified over the -40C to +125C automotive temperature range. Applications Ordering Information Servers RAID Systems PIN- PKG PART TEMP RANGE Industrial Control PACKAGE CODE Medical Equipment MAX7310AUE -40C to +125C 16 TSSOP Instrumentation, Test Measurement MAX7310AEE -40C to +125C 16 QSOP MAX7310ATE -40C to +125C 16 Thin QFN T1644-4 SMBus is a trademark of Intel Corp. Pin Configurations TOP VIEW 12 11 10 9 SCL 1 16 V+ 2 15 RESET SDA RESET I/O3 13 8 3 14 I/O7 AD0 V+ I/O2 14 7 AD1 4 13 I/O6 MAX7310 MAX7310ATE AD2 5 12 I/O5 SCL 15 6 GND I/O0 6 11 I/O4 SDA I/O1 16 5 7 10 I/O3 I/O1 GND 8 9 I/O2 12 3 4 TSSOP/QSOP THIN QFN Maxim Integrated Products 1 For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct at 1-888-629-4642, or visit Maxims website at www.maxim-ic.com. AD0 I/O7 AD1 I/O6 AD2 I/O5 I/O0 I/O42-Wire-Interfaced 8-Bit I/O Port Expander with Reset ABSOLUTE MAXIMUM RATINGS V+ to GND................................................................-0.3V to +6V Continuous Power Dissipation (T = +70C) A I/O1I/O7 as an Input.......................(V - 0.3V) to (V + 0.3V) 16-Pin TSSOP (derate 5.7mW/C above +70C) .........457mW SS DD I/O0 as an Input..............................................(V - 0.3V) to +6V 16-Pin QSOP (derate 8.3mW/C above +70C)...........667mW SS SCL, SDA, AD0, AD1, AD2, RESET ...............(V - 0.3V) to +6V 16-Pin Thin QFN (derate 16.9mW/C above +70C) ...1349mW SS DC Current on I/O0 ........................................................ +400A Operating Temperature Range .........................-40C to +125C DC Current on I/O1 to I/O7 ............................................. 50mA Junction Temperature......................................................+150C Maximum GND and V+ Current........................................180mA Storage Temperature Range .............................-65C to +150C Lead Temperature (soldering, 10s) .................................+300C Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. DC ELECTRICAL CHARACTERISTICS (V+ = 2.3V to 5.5V, GND = 0, RESET = V+, T = -40C to +125C, unless otherwise noted. Typical values are at V+ = 3.3V, T = +25C.) A A (Note 1) PARAMETER SYMB O L CONDITIONS MINTYPMAXUNITS Supply Voltage V+ 2.3 5.5 V V+ = 2.3V 19 30 All outputs floating, Supply Current I+ all inputs at V+ or GND, V+ = 3.3V 29 40 A f = 400kHz SCL V+ = 5.5V 65 80 V+ = 2.3V 1.5 3.4 All outputs floating, Standby Current all inputs at V+ or GND, V+ = 3.3V 1.7 3.9 A f = 0 SCL V+ = 5.5V 2.1 5 Power-On Reset Voltage 1.6 2.1 V SCL, SDA Input Voltage Low V 0.8 V IL Input Voltage High V 2V IH Low-Level Output Voltage V I = 6mA 0.4 V OIL SINK Leakage Current I -1 +1 A L Input Capacitance C 10 pF I I/Os Input Voltage Low V 0.8 V IL Input Voltage High V 2V IH Input Leakage Current I All inputs at V+ or GND -1 +1 A L V+ = 2.3V, V = 0.5V 8 14 OL Low-Level Output Current I mA OL V+ = 3.3V, V = 0.5V 12.5 22 OL V+ = 5.5V, V = 0.5V 19 30 OL V+ = 3.3V, V = 2.4V 6.5 11 OH High Output Current for I/O1I/O7 I mA OH V+ = 5.5V, V = 4.5V 12.5 18 OH AD0, AD1, AD2, AND RESET Input Voltage Low 0.8 V Input Voltage High 2V 2 MAX7310