Click here for production status of specific part numbers. MAX7301 4-Wire-Interfaced, 2.5V to 5.5V, 20-Port and 28-Port I/O Expander General Description Benefits and Features The MAX7301 compact, serial-interfaced I/O expander Industry-Standard 4-Wire Interface Simplifies (or general-purpose I/O (GPIO) peripheral) provides Expansion of I/O Ports to Up to 28 I/Os Independent microprocessors with up to 28 ports. Each port is individu- of Microprocessor Architecture ally user configurable to either a logic input or logic output. High-Speed, 26MHz, SPI-/QSPI-/MICROWIRE - Compatible Serial Interface Each port can be configured either as a push-pull logic 2.25V to 5.5V Operation output capable of sinking 10mA and sourcing 4.5mA, or 20 or 28 I/O Ports Configurable as Push-Pull Logic a Schmitt logic input with optional internal pullup. Seven Output, Schmitt Logic Input or Schmitt Logic Input ports feature configurable transition detection logic, which with Internal Pullup generates an interrupt upon change of port logic level. Logic Transition Detection for Seven I/O Ports The MAX7301 is controlled through an SPI-compatible Low Power Consumption Reduces Power-Supply 4-wire serial interface. Requirements The MAX7301AAX and MAX7301ATL have 28 ports and 11A (max) Shutdown Current are available in 36-pin SSOP and 40-pin TQFN packages, respectively. The MAX7301AAI has 20 ports and is avail- able in a 28-pin SSOP package. Typical Operating Circuit 2 For a 2-wire I C-interfaced version, refer to the MAX7300 3V data sheet. 36 32 V+ P4 I/O 4 30 For a pin-compatible port expander with additional P5 I/O 5 47nF 3 28 GND P6 I/O 6 24mA constant-current LED drive capability, refer to the 2 26 GND P7 I/O 7 MAX6957 data sheet. 5 39k P8 I/O 8 1 ISET 7 P9 I/O 9 9 Applications MAX7301 P10 I/O 10 35 11 CHIP SELECT P11 I/O 11 CS White Goods 33 6 CLOCK IN SCLK P12 I/O 12 34 8 Gaming Machines DATA IN DIN P13 I/O 13 4 10 DATA OUT DOUT P14 Industrial Controllers I/O 14 12 P15 I/O 15 System Monitoring 31 13 P31 P16 I/O 16 29 14 P30 P17 I/O 17 27 15 P29 P18 I/O 18 Ordering Information 25 16 P28 P19 I/O 19 24 17 P27 P20 I/O 20 PIN- 23 18 PART TEMP RANGE P26 P21 I/O 21 PACKAGE 22 19 P25 P22 I/O 22 21 20 P24 P23 I/O 23 MAX7301AAI+ -40 C to +125 C 28 SSOP SSOP MAX7301AAX+ -40 C to +125 C 36 SSOP I/O 24 I/O 25 MAX7301ATL+ -40 C to +125 C 40 TQFN-EP* I/O 26 I/O 27 +Denotes a lead(Pb)-free/RoHS-compliant package. I/O 28 *EP = Exposed pad. I/O 29 I/O 30 QSPI is a trademark of Motorola, Inc. I/O 31 MICROWIRE is a registered trademark of National Semiconductor Corp. Pin Configurations appear at end of data sheet. 19-2438 Rev 10 8/20MAX7301 4-Wire-Interfaced, 2.5V to 5.5V, 20-Port and 28-Port I/O Expander Absolute Maximum Ratings (Voltage with respect to GND.) 36-Pin SSOP (derate 11.8mW/C above +70C) ........941mW V+ ............................................................................-0.3V to +6V 40-Pin TQFN (derate 26.3mW/C above +70C) ...2963.0mW All Other Pins ..............................................-0.3V to (V+ + 0.3V) Operating Temperature Range P4P31 Current ...............................................................30mA (T , T ) ................................................ -40C to +125C MIN MAX GND Current ....................................................................800mA Junction Temperature ......................................................+150C Continuous Power Dissipation (T = +70C) Storage Temperature Range ............................ -65C to +150C A 28-Pin SSOP (derate 9.5mW/C above +70C) ..........762mW 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. Electrical Characteristics (Typical Operating Circuit, V+ = 2.5V to 5.5V, T = T to T , unless otherwise noted.) (Note 1) A MIN MAX PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Operating Supply Voltage V+ 2.5 5.5 V TA = +25C 5.5 8 All digital inputs at V+ Shutdown Supply Current ISHDN TA = -40C to +85C 10 A or GND TA = TMIN to TMAX 11 All ports programmed TA = +25C 180 230 Operating Supply Current as outputs high, no IGPOH TA = -40C to +85C 250 A (Output High) load, all other inputs at TA = TMIN to TMAX 270 V+ or GND All ports programmed TA = +25C 170 210 Operating Supply Current as outputs low, no IGPOL TA = -40C to +85C 230 A (Output Low) load, all other inputs at V+ or GND TA = TMIN to TMAX 240 All ports programmed TA = +25C 110 135 as inputs without Operating Supply Current IGPI pullup, ports, and all TA = -40C to +85C 140 A (Input) other inputs at V+ or TA = TMIN to TMAX 145 GND INPUTS AND OUTPUTS Logic High Input Voltage 0.7 VIH V Port Inputs V+ Logic Low Input Voltage 0.3 VIL V Port Inputs V+ GPIO inputs without pullup, Input Leakage Current IIH, IIL -100 1 +100 nA VPORT = V+ to GND V+ = 2.5V 12 19 30 GPIO Input Internal Pullup to V+ IPU A V+ = 5.5V 80 120 180 Hysteresis Voltage GPIO Inputs DVI 0.3 V GPIO outputs, ISOURCE = 2mA, V+ - TA = -40C to +85C 0.7 Output High Voltage VOH V GPIO outputs, ISOURCE = 1mA, V+ - TA = TMIN to TMAX (Note 2) 0.7 Maxim Integrated 2 www.maximintegrated.com