EVALUATION KIT AVAILABLE 2 MAX7326 I C Port Expander with 12 Push-Pull Outputs and 4 Inputs General Description Features 2 The MAX7326 2-wire serial-interfaced peripheral features 400kHz I C Serial Interface 16 I/O ports. The ports are divided into 12 push-pull out- +1.71V to +5.5V Operating Voltage puts and four input ports with selectable internal pullups. 12 Push-Pull Outputs Rated at 20mA Sink Current Input ports are overvoltage protected to +6V and feature transition detection with interrupt output. 4 Input Ports with Matchable Latching Transition Detection The four input ports are continuously monitored for state changes (transition detection). The interrupt is latched, Input Ports are Overvoltage Protected to +6V allowing detection of transient changes. Any combina- Transient Changes are Latched, Allowing Detection tion of inputs can be selected using the interrupt mask Between Read Operations to assert the open-drain, +6V-tolerant INT output. When the MAX7326 is subsequently accessed through the INT Output Alerts Change on Any Selection of Inputs serial interface, any pending interrupt is cleared. The 12 AD0 and AD2 Inputs Select from 16 Slave Addresses push-pull outputs are rated to sink 20mA and are capable Low 0.6A Standby Current of driving LEDs. The RST input clears the serial inter- 2 ace, terminating any I C communication to or from the -40C to +125C Temperature Range MAX7326. The MAX7326 uses two address inputs with four-level Ordering Information 2 logic to allow 16 I C slave addresses. The slave address also sets the power-up default state for the 12 output PART TEMP RANGE PIN-PACKAGE ports and enables or disables internal 40k pullups in groups of two input ports. MAX7326AEG+ -40C to +125C 24 QSOP The MAX7326 is one device in a family of pin-compatible 24 TQFN-EP* MAX7326ATG+ -40C to +125C port expanders with a choice of input ports, open-drain (4mm x 4mm) I/O ports, and push-pull output ports (see Table 1). +Denotes a lead(Pb)-free/RoHS-compliant package. The MAX7326 is available in 24-pin QSOP and TQFN *EP = Exposed pad. packages and is specified over the -40C to +125C automotive temperature range. Applications Selector Guide Cell Phones Notebooks OPEN- INTERRUPT PUSH-PULL SAN/NAS Satellite Radio PART INPUTS DRAIN MASK OUTPUTS Servers OUTPUTS MAX7324 8 Yes 8 Pin Configurations MAX7325 Up to 8 Up to 8 8 TOP VIEW 18 17 16 15 14 13 MAX7326 4 Yes 12 19 12 SCL O10 MAX7327 Up to 4 Up to 4 12 SDA 20 11 O9 V+ 21 10 O8 MAX7326 INT GND 22 9 RST 23 8 O7 EXPOSED PAD AD2 O6 24 7 + 1 2 3 4 5 6 Typical Application Circuit and Functional Diagram appear O0 O1 I2 I3 I4 I5 at end of data sheet. TQFN (4mm x 4mm) Pin Configurations continued at end of data sheet. 19-3804 Rev 1 5/14 AD0 O15 O14 O13 O12 O112 MAX7326 I C Port Expander with 12 Push-Pull Outputs and 4 Inputs Absolute Maximum Ratings (All voltages referenced to GND.) Continuous Power Dissipation (T = +70C) A Supply Voltage V+ ...................................................-0.3V to +6V 24-Pin QSOP (derate 9.5mW/C over +70C) .........761.9mW SCL, SDA, AD0, AD2, RST, INT, I2I5 ...................-0.3V to +6V 24-Pin TQFN (derate 20.8mW/C over +70C) ......1666.7mW O0, O1, O6O15 .......................................-0.3V to V+ + 0.3V Operating Temperature Range ......................... -40C to +125C O0, O1, O6O15 Output 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 Total GND Current ...........................................................100mA 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 (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 (Interface Idle) I SCL and SDA and other digital inputs at V+ 0.6 1.9 A STB Supply Current (Interface Running) I+ f = 400kHz, other digital inputs at V+ 23 55 A SCL V+ < 1.8V 0.8 x V+ Input High-Voltage SDA, SCL, V V IH AD0, AD2, RST, I2I5 V+ 1.8V 0.7 x V+ V+ < 1.8V 0.2 x V+ Input Low-Voltage SDA, SCL, AD0, V V IL AD2, RST, I2I5 V+ 1.8V 0.3 x V+ SDA, SCL, AD0, AD2, RST, I2I5 at V+ or Input Leakage Current SDA, SCL, I , I -0.2 +0.2 A IH IL AD0, AD2, RST, I2I5 GND Input Capacitance SDA, SCL, AD0, 10 pF AD2, RST, I2I5 QSOP 90 180 V+ = +1.71V, I = 5mA SINK TQFN 90 230 QSOP 110 210 V+ = +2.5V, I = 10mA SINK TQFN 110 260 Output Low-Voltage O0, O1, V mV OL O6O15 QSOP 130 230 V+ = +3.3V, I = 15mA SINK TQFN 130 280 QSOP 140 250 V+ = +5V, I = 20mA SINK TQFN 140 300 V+ = +1.71V, I = 2mA V+ - 250 V+ - 30 SOURCE V+ = +2.5V, I = 5mA V+ - 360 V+ - 30 Output High-Voltage O0, O1, SOURCE V mV OH O6O15 V+ = +3.3V, I = 5mA V+ - 260 V+ - 30 SOURCE V+ = +5V, I = 10mA V+ - 360 V+ - 30 SOURCE Output Low-Voltage SDA V I = 6mA 250 mV OLSDA SINK Output Low-Voltage INT V I = 5mA 130 250 mV OLINT SINK Port Input Pullup Resistor R 25 40 55 k PU Maxim Integrated 2 www.maximintegrated.com