MAX7315 19-3056 Rev 3 1/05 8-Port I/O Expander with LED Intensity Control, Interrupt, and Hot-Insertion Protection General Description Features 2 The MAX7315 I C-/SMBus-compatible serial interfaced 400kbps, 2-Wire Serial Interface, 5.5V Tolerant peripheral provides microprocessors with 8 I/O ports. 2V to 3.6V Operation Each I/O port can be individually configured as either an Overall 8-Bit PWM LED Intensity Control open-drain current-sinking output rated at 50mA at 5.5V, Global 16-Step Intensity Control or a logic input with transition detection. A ninth port can be used for transition detection interrupt or as a general- Plus Individual 16-Step Intensity Control purpose output. The outputs are capable of directly dri- Automatic Two-Phase LED Blinking ving LEDs, or providing logic outputs with external 50mA Maximum Port Output Current resistive pullup up to 5.5V. Supports Hot Insertion PWM current drive is integrated with 8 bits of control. Outputs Are 5.5V-Rated Open Drain Four bits are global control and apply to all LED outputs to provide coarse adjustment of current from fully off to Inputs Are Overvoltage Protected to 5.5V fully on in 14 intensity steps. Each output then has indi- Transition Detection with Interrupt Output vidual 4-bit control, which further divides the globally Low Standby Current (1.2A typ 3.3A max) set current into 16 more steps. Alternatively, the current Tiny 3mm x 3mm, Thin QFN Package control can be configured as a single 8-bit control that sets all outputs at once. -40C to +125C Temperature Range The MAX7315 is pin and software compatible with the All Ports Can Be Configured as Inputs or Outputs PCA9534 and PCA9554(A). Each output has independent blink timing with two blink Ordering Information phases. All LEDs can be individually set to be on or off during either blink phase, or to ignore the blink control. PIN- TEMP TOP PKG PART The blink period is controlled by a register. PACKAGE RANGE MARK CODE The MAX7315 supports hot insertion. All port pins, the INT 16 Thin QFN output, SDA, SCL, and the slave address inputs ADO-2 MAX7315ATE -40C to +125C 3mm x 3mm AAU T1633-4 x 0.8mm remain high impedance in power-down (V+ = 0V) with up to 6V asserted upon them. 16 QSOP MAX7315AEE -40C to +125C 2 16 TSSOP The MAX7315 is controlled through the 2-wire I C/SMBus MAX73 15AU E -40C to +125C 2 serial interface, and can be configured to one of 64 I C addresses. Applications Pin Configurations LCD Backlights Keypad Backlights TOP VIEW LED Status Indication RGB LED Drivers 12 11 10 9 Portable Equipment Cellular Phones Laptop Computers SDA 13 8 P5 V+ 14 7 P4 MAX7315ATE ADO 15 6 GND AD1 16 5 P3 Typical Application Circuit appears at end of data sheet. 12 3 4 THIN QFN Pin Configurations continued at end of data sheet. Maxim Integrated Products 1 For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct at 1-888-629-4642, or visit Maxims website at www.maxim-ic.com. EVALUATION KIT AVAILABLE AD2 SCL P0 INT/O8 P1 P7 P6 P28-Port I/O Expander with LED Intensity Control, Interrupt, and Hot-Insertion Protection ABSOLUTE MAXIMUM RATINGS Voltage (with respect to GND) 16-Pin TSSOP (derate 9.4mW/C over +70C) ............754mW V+.............................................................................-0.3V to +4V 16-Pin QSOP (derate 8.3mW/C over +70C)..............666mW SCL, SDA, AD0, AD1, AD2, P0P7 ..........................-0.3V to +6V 16-Pin QFN (derate 14.7mW/C over +70C) ............1176mW INT/O8 .....................................................................-0.3V to +8V Operating Temperature Range (T to T )-40C to +125C MIN MAX DC Current on P0P7, INT/O8 ............................................55mA Junction Temperature......................................................+150C DC Current on SDA.............................................................10mA Storage Temperature Range .............................-65C to +150C Maximum GND Current ....................................................190mA Lead Temperature (soldering, 10s) .................................+300C Continuous Power Dissipation (T = +70C) A 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 (Typical Operating Circuit, V+ = 2V to 3.6V, T = T to T , unless otherwise noted. Typical values are at V+ = 3.3V, T = +25C.) A MIN MAX A (Note 1) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Operating Supply Voltage V+ 2 3.6 V Output Load External Supply V 0 5.5 V EXT Voltage T = +25C 1.2 2.3 A SCL and SDA at V+ other Standby Current I digital input s at V+ or GND T = -40C to +85C 2.6 A + A (Interface Idle, PWM Disabled) PWM intensit y control disab led T = T to T 3.3 A MIN MAX T = +25C 7 12.1 A SCL and SDA at V+ other Supply Current I A + digital input s at V+ or GND TA = -40C to +85C 13.5 (Interface Idle, PWM Enabled) PWM intensit y control enabl ed T = T to T 14.4 A MIN MAX T = +25C 40 76 A Supply Current f = 400kHz other digital SCL (Interface Running, PWM I inputs at V+ or GND PWM T = -40C to +85C 78 A + A Disabled) intensity control disabled T = T to T 80 A MIN MAX T = +25C 51 110 A Supply Current f = 400kHz other digital SCL (Interface Running, PWM I inputs at V+ or GND PWM T = -40C to +85C 117 A + A Enabled) intensity control enabled TA = TMIN to TMAX 122 Input High Voltage 0.7 5 SDA, SCL, AD0, AD1, AD2, V V IH V+ P0P7 Input Low Voltage 0.3 5 SDA, SCL, AD0, AD1, AD2, V V IL V+ P0P7 Input Leakage Current SDA, SCL, AD0, AD1, AD2, I , I Input = GND or V+ -0.2 +0.2 A IH IL P0P7 Input Capacitance SDA, SCL, AD0, AD1, AD2, 8pF P0P7 2 MAX7315