EVALUATION KIT AVAILABLE MAX7360 2 I C-Interfaced Key-Switch Controller and LED Driver/GPIOs with Integrated ESD Protection General Description Features 2 The MAX7360 I C-interfaced peripheral provides micro- S Integrated ESD Protection 8kV IEC 61000-4-2 Contact Discharge processors with management of up to 64 key switches, 15kV IEC 61000-4-2 Air-Gap Discharge with an additional eight LED drivers/GPIOs that feature constant-current, PWM intensity control, and rotary S +14V Tolerant, Open-Drain I/O Ports Capable of switch control options. Constant-Current LED Drive The key-switch drivers interface with metallic or resis- S Rotary Switch-Capable Input Pair (PORT6, PORT7) tive switches with on-resistances up to 5kI. Key inputs S 256-Step PWM Individual LED Intensity Control are monitored statically, not dynamically, to ensure S Individual LED Blink Rates and Common LED low-EMI operation. The MAX7360 features autosleep Fade In/Out Rates from 256ms to 4096ms and autowake modes to further minimize the power S FIFO Queues Up to 16 Debounced Key Events consumption of the device. The autosleep feature puts the device in a low-power state (1FA typ) after a sleep S User-Configurable Key Debounce (9ms to 40ms) timeout period. The autowake feature configures the S Keyscan Uses Static Matrix Monitoring for Low MAX7360 to return to normal operating mode from sleep EMI Operation upon a keypress. S +1.62V to +3.6V Operation The key controller debounces and maintains a FIFO of S Monitors Up to 64 Keys keypress and release events (including autorepeat, if S Key-Switch Interrupt (INTK) on Each Debounced enabled). An interrupt (INTK) output can be configured Event/FIFO Level, or End of Definable Time Period to alert keypresses, as they occur, or at maximum rate. S Port Interrupt (INTI) for Input Ports for Special-Key There are eight open-drain I/O ports, which can be used Functions to drive LEDs. The maximum constant-current level for S 400kbps, +5.5V Tolerant 2-Wire Serial Interface each open-drain port is 20mA. The intensity of the LED with Selectable Bus Timeout on each open-drain port can be individually adjusted 2 through a 256-step PWM control. An input port pair S Four I C Address Choices (PORT6, PORT7) can be configured to accept 2-bit gray Ordering Information code inputs from a rotary switch. In addition, if not used for key-switch control, up to six column pins can be used PART TEMP RANGE PIN-PACKAGE as general-purpose open-drain outputs (GPOs) for LED MAX7360ETL+ -40C to +85C 40 TQFN-EP* drive or logic control. MAX7360EWX+ -40C to +85C 36 WLP The MAX7360 is offered in a 40-pin (5mm x 5mm) +Denotes a lead(Pb)-free/RoHS-compliant package. thin QFN package with an exposed pad, and a small *EP = Exposed pad. 36-bump wafer level package (WLP) for cell phones, pocket PCs, and other portable consumer electronic Simplified Block Diagram applications. The MAX7360 operates over the -40NC to +85NC extended temperature range. +1.8V +14V ROTARY Applications TO SCL SWITCH FC PORT7 SDA Cell Phones PORT6 INTI PDAs INTK MAX7360 Handheld Games PORT0 Portable Consumer Electronics AD0 ROW (8x) Printers COL (8x) Instrumentation 8 x 8 Pin Configurations appear at end of data sheet. For pricing, delivery, and ordering information, please contact Maxim Direct at 19-4566 Rev 2 1/13 1-888-629-4642, or visit Maxim Integrateds website at www.maximintegrated.com.MAX7360 2 I C-Interfaced Key-Switch Controller and LED Driver/GPIOs with Integrated ESD Protection ABSOLUTE MAXIMUM RATINGS V to GND .............................................................-0.3V to +4V Storage Temperature Range ............................ -65NC to +150NC CC COL0COL7, ROW0ROW7 to GND ......................-0.3V to +4V ESD Protection SDA, SCL, AD0, INTI, INTK to GND ........................-0.3V to +6V Human Body Model (R = 1.5kI, C = 100pF) D S PORT0PORT7 to GND .........................................-0.3V to +16V All Pins .............................................................................Q2kV All Other Pins to GND ................................-0.3V to (V + 0.3V) CC IEC 61000-4-2 (R = 330I, C = 150pF) D S DC Current on PORT0PORT7, COL2COL7 ....................25mA Contact Discharge GND Current .......................................................................80mA ROW0ROW7, COL0COL7, PORT0PORT7 to GND ....Q8kV Continuous Power Dissipation (T = +70NC) Air-Gap Discharge A TQFN (derate 22.2mW/NC above +70NC) ..................1777mW ROW0ROW7, COL0COL7, PORT0PORT7 to GND ..Q15kV WLP (derate 21.7mW/NC above +70NC) ....................1739mW Lead Temperature (TQFN only soldering, 10s) ..............+300NC Operating Temperature Range .......................... -40NC to +85NC Soldering Temperature (reflow) .......................................+260NC Junction Temperature .....................................................+150NC 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. PACKAGE THERMAL CHARACTERISTICS (Note 1) TQFN WLP Junction-to-Ambient Thermal Resistance (B ) ......... 45NC/W Junction-to-Ambient Thermal Resistance (B ) WLP . 46NC/W JA JA Junction-to-Case Thermal Resistance (B ) ................ 2NC/W JC Note 1: Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a single- www.maximintegrated.com/thermal-tutorial layer board. For detailed information on package thermal considerations, refer to . ELECTRICAL CHARACTERISTICS (V = +1.62V to +3.6V, T = -40NC to +85NC, unless otherwise noted. Typical values are at V = +3.3V, T = +25NC.) (Notes 2, 3) CC A CC A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Operating Supply Voltage V 1.62 3.3 3.6 V CC External Supply Voltage V 14 V PORT PORT0PORT7 All key switches open, oscillator running, COL2COL7 configured as key switches, 34 50 V = V PORT CC Operating Supply Current I FA CC 34 + N keys pressed 20 x N Sleep-Mode Supply Current I 1.3 3 FA SL Key-Switch Source Current I 20 35 FA KEY Key-Switch Source Voltage V 0.43 0.5 V KEY Key-Switch Resistance R (Note 4) 5 kI KEY Startup Time from Shutdown t 2 2.4 ms START Output Low Voltage V I = 10mA 0.5 V OL SINK COL2COL7 125 128 131 T = +25NC, V = +2.61V A CC Oscillator Frequency (PWM f kHz OSC Clock) 102 164 T = T to T , V P 3.6V A MIN MAX CC Oscillator Frequency Variation Df T = +25NC -7 +14 % OSC A Key-Scan Frequency f Derived from oscillator clock 64 kHz KEY 2 Maxim Integrated