EVALUATION KIT AVAILABLE 2 MAX7319 I C Port Expander with Eight Inputs and Maskable Transition Detection General Description Features 2 The MAX7319 2-wire serial-interfaced peripheral 400kHz, +5.5V -Tolerant I C Serial Interface fea-tures eight input ports with selectable internal pullups, +1.71V to +5.5V Operating V oltage overvoltage protection to +6V, and transition detection Eight Input Ports with Maskable, Latching Transition with interrupt output. Detection All input ports are continuously monitored for state Input Ports are Overvoltage Protected to +6V changes (transition detection). Transitions are latched, allowing detection of transient changes. Any combination Transient Changes are Latched, Allowing Detection of inputs can be selected using the interrupt mask to assert Between Read Operations the INT output. When the MAX7319 is subsequently INT Output Alerts Change on Any Selection of Inputs accessed through the serial interface, any pending interrupt is cleared. AD0 and AD2 Inputs Select from 16 Slave Addresses The +5.5V tolerant RST input clears the serial Low 0.6A (typ) Standby Current 2 interface, terminating any I C communication to or from -40C to +125C Operating Temperature Range the MAX7319. The MAX7319 uses two address inputs with four-level 2 logic to allow 16 I C slave addresses. The slave address Ordering Information also enables or disables internal 40k pullups in groups of four ports. PIN- TOP PART TEMP RANGE The MAX7319 supports hot insertion. All eight input ports, PACKAGE MARK the serial interface SDA, SCL, AD0, AD2, INT, and RST MAX7319AEE+ -40 TO +125C 16 QSOP remain high impedance in power-down (V+ = 0) with up MAX7319ATE+ -40 TO +125C 16 TQFN-EP* ADA to +6V asserted on them. +Denotes a lead(Pb)-free/RoHS-compliant package. The MAX7319 is one device in a family of pin-compatible *EP = Exposed pad. port expanders with a choice of input ports, open-drain I/O ports, and push-pull output ports (see Table 1). The MAX7319 is available in 16-pin QSOP and 16-pin Pin Configurations, Typical Application Circuit, and TQFN packages, and is specified over the automotive Functional Diagram appear at end of data sheet. temperature range (-40C to +125C). Applications Cell Phones Notebooks SAN/NAS Satellite Radio Servers Selector Guide PART INPUTS INTERRUPT MASK OPEN-DRAIN OUTPUTS PUSH-PULL OUTPUTS MAX7319 8 Yes MAX7320 8 MAX7321 Up to 8 Up to 8 MAX7322 4 Yes 4 MAX7323 Up to 4 Up to 4 4 MAX7328* Up to 8 Up to 8 MAX7329** *Second source to PCF8574. **Second source to PCF8574A. 19-3809 Rev 2 5/142 MAX7319 I C Port Expander with Eight Inputs and Maskable Transition Detection Absolute Maximum Ratings (All voltages referenced to GND.) Continuous Power Dissipation (TA = +70C) Supply Voltage V+ ...................................................-0.3V to +6V 16-Pin QSOP (derate 8.3mW/C over +70C) ............667mW SCL, SDA, AD0, AD2, RST, INT, I0I7 ...................-0.3V to +6V 16-Pin TQFN (derate 15.6mW/C over +70C) ........1250mW SDA Input Current ............................................................. 10mA Operating Temperature Range ......................... -40C to +125C INT Input Current................................................................10mA Junction Temperature ......................................................+150C Total V+ Current .................................................................50mA Storage Temperature Range ............................ -65C to +150C Total GND Current ...........................................................100mA 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 (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 V 1.6 V POR Standby Current (Interface Idle) I SCL and SDA and other digital inputs at V+ 0.6 1.5 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 1.8V 0.7 x V+ + V < 1.8V 0.2 x V+ Input Low Voltage + V V IL SDA, SCL, AD0, AD2, RST, I0I7 V 1.8V 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 Output Low Voltage V I = 6mA 250 mV OLSDA SINK SDA Output Low Voltage V I = 5mA 100 250 mV OLINT SINK INT Port Input Pullup Resistor R 25 40 55 kW PU Maxim Integrated 2 www.maximintegrated.com