EVALUATION KIT AVAILABLE 2 MAX7324 I C Port Expander with Eight Push-Pull Outputs and Eight Inputs General Description Features 2 The MAX7324 2-wire serial-interfaced peripheral features 400kHz, +6V-Tolerant I C Serial Interface 16 I/O ports that are divided into eight push-pull outputs +1.71V to +5.5V Operating Voltage and eight inputs. Each input features selectable internal Eight Push-Pull Outputs pullups, overvoltage protection to +6V, and transition detection with an interrupt output. Eight Input Ports with Maskable, Latching Transition Detection All 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 combination Transient Changes are Latched, Allowing Detection of inputs can be selected using the interrupt mask to assert the INT output. When the MAX7324 is subsequently Between Read Operations accessed through the serial interface, any pending inter- INT Output Alerts Change on Any Selection of Inputs rupt is cleared. AD0 and AD2 Inputs Select from 16 Slave Addresses The push-pull outputs are rated to sink 20mA and are Low 0.6A Standby Current capable of driving LEDs. The RST input clears the serial 2 interface, terminating any I C communication to or from -40C to +125C Temperature Range the MAX7324. The MAX7324 uses two address inputs with four-level Ordering Information 2 logic to allow 16 I C slave addresses. The slave address also enables or disables internal 40k pullups in groups PIN- PART TEMP RANGE of four ports. PACKAGE The MAX7324 is one device in a family of pin-compatible MAX7324AEG+ -40C to +125C 24 QSOP port expanders with a choice of input ports, open-drain I/O 24 TQFN-EP* ports, and push-pull output ports (see Table 1). MAX7324ATG+ -40C to +125C (4mm x 4mm) The MAX7324 is available in 24-pin QSOP and TQFN +Denotes a lead(Pb)-free/RoHS-compliant package. packages, and is specified over the -40C to +125C *EP = Exposed pad. automotive temperature range. Applications Cell Phones Notebooks Selector Guide SAN/NAS Satellite Radio OPEN- Servers INTERRUPT PUSH-PULL PART INPUTS DRAIN MASK OUTPUTS OUTPUTS Pin Configurations MAX7324 8 Yes 8 TOP VIEW 18 17 16 15 14 13 MAX7325 Up to 8 Up to 8 8 SCL 19 12 O10 MAX7326 4 Yes 12 SDA 20 11 O9 MAX7327 Up to 4 Up to 4 12 V+ 21 10 O8 MAX7324 INT 22 9 GND RST I7 23 8 EXPOSED PAD AD2 24 7 I6 + 1 2 3 4 5 6 Typical Application Circuit and Functional Diagram appear TQFN (4mm x 4mm) at end of data sheet. Pin Configurations continued at end of data sheet. 19-3785 Rev 1 5/14 I0 AD0 I1 O15 I2 O14 I3 O13 I4 O12 I5 O112 MAX7324 I C Port Expander with Eight Push-Pull Outputs and Eight Inputs Absolute Maximum Ratings (All voltages referenced to GND.) Total GND Current ...........................................................100mA Supply Voltage V+ ...................................................-0.3V to +6V Continuous Power Dissipation SCL, SDA, AD0, AD2, RST, INT, I0I7 ...................-0.3V to +6V QSOP (derate 9.5mW/C over T = +70C) ...............761.9mW A O8O15 .......................................................-0.3V to (V+ + 0.3V) TQFN (derate 20.8mW/C over T = +70C) .........1666.7mW A O8O15 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+ 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 I+ f = 400kHz other digital inputs at V+ 23 55 A SCL (Interface Running) V+ < 1.8V 0.8 x V+ Input High-Voltage V V IH SDA, SCL, AD0, AD2, RST, I0I7 V+ 1.8 0.7 x V+ V+ < 1.8V 0.2 x V+ Input Low-Voltage V V IL SDA, SCL, AD0, AD2, RST, I0I7 V+ 1.8 0.3 x V+ Input Leakage Current SDA, SCL, AD0, AD2, RST, I0I7 at V+ or I , I -0.2 +0.2 A IH IL SDA, SCL, AD0, AD2, RST, I0I7 GND Input Capacitance 10 pF SDA, SCL, AD0, AD2, RST, I0I7 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 Output Low Voltage SINK V mV OL O8O15 V+ = +3.3V, I = 15mA (QSOP) 130 230 SINK 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 Output High Voltage SOURCE V mV OH O8O15 V+ = +3.3V, I = 5mA V+ - 260 V+ - 100 SOURCE V+ = +5V, I = 10mA V+ - 360 V+ - 120 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 kW PU Maxim Integrated 2 www.maximintegrated.com