EVALUATION KIT AVAILABLE 2 MAX7322 I C Port Expander with 4 Push-Pull Outputs and 4 Inputs General Description Features The MAX7322 2-wire serial-interfaced peripheral features 2 400kHz I C Serial Interface four push-pull outputs and four input ports with selectable +1.71V to +5.5V Operation Voltage internal pullups. Input ports are overvoltage protected to +6V and feature transition detection with interrupt output. 4 Push-Pull Output Ports Rated at 20mA Sink Current The four input ports are continuously monitored for state changes (transition detection). The interrupt is latched, 4 Input Ports with Maskable, Latching Transition allowing detection of transient changes. Any combination Detection of inputs can be selected using the interrupt mask to Input Ports are Overvoltage Protected to +6V assert the open-drain INT output. When the MAX7322 is subsequently accessed through the serial interface, any Transient Changes are Latched, Allowing pending interrupt is cleared. Detection Between Read Operations The four push-pull outputs are rated to sink 20mA, and INT Output Alerts Change on Any Selection of Inputs are capable of driving LEDs. AD0 and AD2 Inputs Select from 16 Slave Addresses The RST input clears the serial interface, terminating any Low 0.6A (typ) Standby Current 2 I C communication to or from the MAX7322. -40C to +125C Operating Temperature Range The MAX7322 uses two address inputs with four-level 2 logic to allow 16 I C slave addresses. The slave address also sets the power-up default logic state for the four out- Ordering Information put ports, and enables or disables internal 40k pullups TOP for the input ports. PART TEMP RANGE PIN-PACKAGE MARK The MAX7322 is one device in a family of pin-compatible MAX7322AEE+ -40C to +125C 16 QSOP port expanders with a choice of input ports, open-drain I/O ports, and push-pull output ports (see Table 1). 16 TQFN-EP* MAX7322ATE+ -40C to +125C ADD The MAX7322 is available in 16-pin QSOP and TQFN (3mm x 3mm) packages, and is specified over the -40C to +125C +Denotes a lead(Pb)-free/RoHS-compliant package. automotive temperature range. *EP = Exposed pad. Applications Selector Guide Cell Phones Notebooks OPEN- SAN/NAS Satellite Radio INTERRUPT PUSH-PULL PART INPUTS DRAIN MASK OUTPUTS Servers OUTPUTS Pin Configurations MAX7319 8 Yes TOP VIEW MAX7320 8 12 11 10 9 MAX7321 Up to 8 Up to 8 I5 SDA 13 8 MAX7322 4 Yes 4 7 I4 V+ 14 MAX7322 MAX7323 Up to 4 Up to 4 4 AD0 15 6 GND MAX7328 Up to 8 Up to 8 *EP RST 16 5 I3 + MAX7329 Up to 8 Up to 8 1 2 3 4 TQFN (3mm x 3mm) Typical Application Circuit and Functional Diagram appear Pin Configurations continued at end of data sheet. at end of data sheet. 19-3787 Rev 2 5/14 AD2 SCL O0 INT O1 O7 I2 O62 MAX7322 I C Port Expander with 4 Push-Pull Outputs and 4 Inputs 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, I2I5 ...................-0.3V to +6V QSOP (derate 8.3mW/C above +70C) .....................667mW O0, O1, O6, O7 ............................................... -0.3 to V+ + 0.3V TQFN (derate 15.6mW/C above +70C)..................1250mW O0, O1, O6, O7 Output Current .......................................25mA Operating Temperature Range ......................... -40C to +125C SDA Sink Current .............................................................. 10mA Junction Temperature ......................................................+150C INT Sink Current.................................................................10mA Storage Temperature Range ............................ -65C to +150C Total V+ Current .................................................................50mA 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+ = +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+ 1.71 5.50 V Power-On Reset Voltage VPOR V+ falling 1.6 V Standby Current ISTB SCL and SDA and other digital inputs at V+ 0.6 1.5 A (Interface Idle) Supply Current I+ fSCL = 400kHz other digital inputs at V+ 23 55 A (Interface Running) V+ < 1.8V 0.8 x V+ Input High Voltage VIH V SDA, SCL, AD0, AD2, RST, I2I5 V+ 1.8V 0.7 x V+ V+ < 1.8V 0.2 x V+ Input Low Voltage VIL V SDA, SCL, AD0, AD2, RST, I2I5 V+ 1.8V 0.3 x V+ Input Leakage Current SDA, SCL, AD0, AD2, RST, at V+ or IIH, IIL -0.2 +0.2 A SDA, SCL, AD0, AD2, RST, I2I5 GND, internal pullup disabled Input Capacitance 10 pF SDA, SCL, AD0, AD2, RST, I2I5 V+ = +1.71V, ISINK = 5mA 90 180 V+ = +2.5V, ISINK = 10mA 110 210 Output Low Voltage VOL mV O0, O1, O6, O7 V+ = +3.3V, ISINK = 15mA 130 230 V+ = +5V, ISINK = 20mA 140 250 V+ = +1.71V, ISOURCE = 2mA V+ - 250 V+ - 30 V+ = +2.5V, ISOURCE = 5mA V+ - 360 V+ - 70 Output High Voltage VOH mV O0, O1, O6, O7 V+ = +3.3V, ISOURCE = 5mA V+ - 260 V+ - 100 V+ = +5V, ISOURCE = 10mA V+ - 360 V+ - 120 Output Low Voltage SDA VOLSDA ISINK = 6mA 250 mV Output Low Voltage INT VOLINT ISINK = 5mA 130 250 mV Port Input Pullup Resistor RPU 25 40 55 kW Maxim Integrated 2 www.maximintegrated.com