EVALUATION KIT AVAILABLE 2 MAX7325 I C Port Expander with 8 Push-Pull and 8 Open-Drain I/Os General Description Benefits and Features 2 The MAX7325 2-wire serial-interfaced peripheral features 400kHz I C Serial Interface 16 I/O ports. Ports are divided into eight push-pull outputs +1.71V to +5.5V Operation and eight I/Os with selectable internal pullups and transition 8 Push-Pull Outputs detection. Eight ports are push-pull outputs and eight I/Os may be used as a logic input or an open-drain output. 8 Open-Drain I/O Ports, Rated to 20mA Sink Current Ports are overvoltage protected to +6V. I/O Ports are Overvoltage Protected to +6V All I/O ports configured as inputs are continuously monitored Selectable I/O Port Power-Up Default Logic States for state changes (transition detection). State changes are Transient Changes are Latched, Allowing Detection indicated by the INT output. The interrupt is latched, allowing Between Read Operations detection of transient changes. When the MAX7325 is subsequently accessed through the serial interface, any INT Output Alerts Change on Inputs pending interrupt is cleared. The open-drain outputs are AD0 and AD2 Inputs Select from 16 Slave Addresses rated to sink 20mA, and are capable of driving LEDs. The Low 0.6A (typ) Standby Current 2 RST input clears the serial interface, terminating any I C communication to or from the MAX7325. -40C to +125C Temperature Range The MAX7325 uses two address inputs with four-level Ordering Information 2 logic to allow 16 I C slave addresses. The slave address also determines the power-up logic state for the I/O ports, PART TEMP RANGE PIN-PACKAGE and enables or disables internal 40k pullups in groups MAX7325AEG+ -40C to +125C 24 QSOP of four ports. MAX7325AEG/V+ -40C to +125C 24 QSOP The MAX7325 is one device in a family of pin-compatible 24 TQFN-EP* port expanders with a choice of input ports, open-drain MAX7325ATG+ -40C to +125C (4mm x 4mm) I/O ports, and push-pull output ports (see Table 1). +Denotes a lead(Pb)-free/RoHS-compliant package. The MAX7325 is available in 24-pin QSOP and TQFN *EP = Exposed paddle. packages and is specified over the -40C to +125C /V Denotes an automotive qualified part. automotive temperature range. Applications Selector Guide Cell Phones Notebooks SAN/NAS Satellite Radio OPEN- INTERRUPT PUSH-PULL Servers Automotive PART INPUTS DRAIN MASK OUTPUTS OUTPUTS Pin Configurations MAX7324 8 Yes 8 TOP VIEW MAX7325 Up to 8 Up to 8 8 18 17 16 15 14 13 MAX7326 4 Yes 12 SCL 19 12 O10 MAX7327 Up to 4 Up to 4 12 20 11 SDA O9 V+ 21 10 O8 INT MAX7325 GND 22 9 RST 23 8 P7 Typical Application Circuit and Functional Diagram appear EXPOSED PADDLE AD2 24 7 P6 + at end of data sheet. 1 2 3 4 5 6 TQFN (4mm x 4mm) Pin Configurations continued at end of data sheet. 19-3807 Rev 2 12/15 P0 AD0 P1 O15 P2 O14 P3 O13 P4 O12 P5 O112 MAX7325 I C Port Expander with 8 Push-Pull and 8 Open-Drain I/Os Absolute Maximum Ratings (All voltages referenced to GND.) Total GND Current ...........................................................100mA Supply Voltage V+ ...................................................-0.3V to +6V Continuous Power Dissipation (T = +70C) A SCL, SDA, AD0, AD2, RST, INT, P0P7 ................-0.3V to +6V 24-Pin QSOP (derate 9.5mW/C over +70C) .........761.9mW O8O15 .......................................................-0.3V to (V+ + 0.3V) 24-Pin TQFN (derate 20.8mW/C over+70C) .......1666.7mW O8O15 Output Current ...................................................25mA Operating Temperature Range ......................... -40C to +125C P0P7 Sink Current............................................................25mA Junction Temperature ......................................................+150C SDA Sink Current .............................................................. 10mA Storage Temperature Range ............................ -65C to +150C INT Sink Current.................................................................10mA Lead Temperature (soldering, 10s) .................................+300C Total V+ Current .................................................................50mA Soldering Temperature (reflow) .......................................+260C 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+ = +1.71V to +5.5V, T = -40C to +125C, unless otherwise noted. Typical values are at V+ = +3.3V, T = +25C.) (Note 1) A A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Operating Supply Voltage V+ T = -40C to +125C 1.71 5.50 V A Power-On-Reset Voltage V V+ falling 1.6 V POR Standby Current SCL and SDA and other T = -40C to A I 0.6 1.9 A STB (Interface Idle) digital inputs at V+ +125C Supply Current f = 400kHz other T = -40C to SCL A I+ 23 55 A (Interface Running) digital inputs at V+ +125C V+ < 1.8V 0.8 x V+ Input High-Voltage V V IH SDA, SCL, AD0, AD2, RST, P0P7 V+ 1.8V 0.7 x V+ V+ < 1.8V 0.2 x V+ Input Low-Voltage V V IL SDA, SCL, AD0, AD2, RST, P0P7 V+ 1.8V 0.3 x V+ Input Leakage Current SDA, SCL, AD0, AD2, RST, P0P7 at V+ or I , I -0.2 +0.2 A IH IL SDA, SCL, AD0, AD2, RST, P0P7 GND, internal pullup disabled Input Capacitance 10 pF SDA, SCL, AD0, AD2, RST, P0P7 V+ = +1.71V, I = 5mA (QSOP) 90 180 SINK V+ = +1.71V, I = 5mA (TQFN) 90 230 SINK V+ = +2.5V, I = 10mA (QSOP) 110 210 SINK V+ = +2.5V, I = 10mA (TQFN) 110 260 SINK Output Low Voltage V V+ = +3.3V, I = 15mA (QSOP) 130 230 mV OL SINK O8O15, P0P7 V+ = +3.3V, I = 15mA (TQFN) 130 280 SINK V+ = +5V, I = 20mA (QSOP) 140 250 SINK V+ = +5V, I = 20mA (TQFN) 140 300 SINK V+ = +1.71V, I = 2mA V+ - 250 V+ - 30 SOURCE V+ = +2.5V, I = 5mA V+ - 360 V+ - 70 SOURCE V+ = +3.3V, I = 5mA V+ - 260 V+ - 100 Output High Voltage SOURCE V mV OH O8O15 V+ = +5V, I = 10mA V+ - 360 V+ - 120 SOURCE I = 6mA 250 SINK Output Low-Voltage SDA V I = 5mA 130 250 mV OLSDA SINK Output Low-Voltage INT V 25 40 55 mV OLINT Port Input Pullup Resistor R k PU Maxim Integrated 2 www.maximintegrated.com