MAX6964 19-3179 Rev 3 3/05 17-Output LED Driver/GPO with Intensity Control and Hot-Insertion Protection General Description Features 2 400kbps, 2-Wire Serial Interface, 5.5V Tolerant The MAX6964 I C-compatible serial interfaced periph- eral provides microprocessors with 17 output ports. 2V to 3.6V Operation Each output is an open-drain current-sinking output Overall 8-Bit PWM LED Intensity Control rated at 50mA and 7V. The outputs are capable of dri- Global 16-Step Intensity Control ving LEDs, or providing logic outputs with external Plus Individual 16-Step Intensity Controls resistive pullup up to 7V. Two-Phase LED Blinking Eight-bit PWM current control is also integrated. Four of High Port Output CurrentEach Port 50mA (max) the bits are global control and apply to all LED outputs RST Input Clears the Serial Interface and to provide coarse adjustment of current from fully off to Restores Power-Up Default State fully on with 14 intensity steps. Additionally, each output Supports Hot Insertion has an individual 4-bit control, which further divides the Outputs are 7V-Rated Open Drain globally set current into 16 more steps. Alternatively, Low Standby Current (1.2A (typ), 3.3A (max)) the current control can be configured as a single 8-bit Small 4mm x 4mm, 0.8mm High Thin QFN Package control that sets all outputs at once. -40C to +125C Temperature Range Each output has independent blink timing with two blink phases. LEDs can be individually set to be either on or Ordering Information off during either blink phase, or to ignore the blink con- trol. The blink period is controlled by an external clock PIN- PART TEMP RANGE PKG CODE (up to 1kHz) on BLINK or by a register. The BLINK PACKAGE input can also be used as a logic control to turn the LEDs on and off, or as a general-purpose input (GPI). 24 Thin QFN MAX6964ATG -40C to +125C 4mm x 4mm T2444-4 The MAX6964 supports hot insertion. The SDA, SCL, x 0.8mm RST, BLINK, and the slave address input ADO remain MAX6964AEG -40C to +125C 24 QSOP high impedance in power-down (V+ = 0V) with up to 6V asserted upon them. The output ports remain high impedance with up to 8V asserted upon them. Pin Configurations 2 The MAX6964 is controlled through a 2-wire I C serial interface, and can be configured to one of four TOP VIEW 2 I C addresses. 18 17 16 15 14 13 Applications O10 SCL 19 12 LCD Backlights Keypad Backlights O9 SDA 20 11 LED Status Indication RGB LED Drivers V+ 21 10 O8 MAX6964 O16 22 9 GND Typical Application Circuit at end of data sheet. RST 23 8 O7 AD0 24 7 O6 1 23 4 5 6 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 O0 BLINK O1 O15 O2 O14 O3 O13 O12 O4 O5 O1117-Output LED Driver/GPO with Intensity Control and Hot-Insertion Protection ABSOLUTE MAXIMUM RATINGS Voltage (with respect to GND) Continuous Power Dissipation (T = +70C) A V+.............................................................................-0.3V to +4V 24-Pin QSOP (derate 9.5mW/C over +70C)..............761mW SCL, SDA, AD0, BLINK, RST ...................................-0.3V to +6V 24-Pin QFN (derate 20.8mW/C over +70C) ............1666mW O0O16 ....................................................................-0.3V to +8V Operating Temperature Range .........................-40C to +125C DC Current on O0 to O16 ...................................................55mA Junction Temperature......................................................+150C DC Current on SDA.............................................................10mA Storage Temperature Range .............................-65C to +150C Maximum GND Current ....................................................350mA 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 (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+ 2.0 3.6 V Output Load External Supply V 07V EXT Voltage T = +25C 1.2 2.3 A S C L and S D A at V+ other Standby Current I d i g i tal i nputs at V+ or GN D T = -40C to +85C 2.6 A + A (Interface Idle, PWM Disabled) P WM i ntensity control d i sab l ed T = T to T 3.3 A MIN MAX T = +25C 8.5 15.1 A S C L and S D A at V+ other Supply Current I d i g i tal i nputs at V+ or GN D T = -40C to +85C 16.5 A + A (Interface Idle, PWM Enabled) P WM i ntensity control d i sab l ed T = T to T 17.2 A MIN MAX T = +25C 50 95.3 A Supply Current f = 400kHz other digital SCL (Interface Running, PWM I inputs at V+ or GND PWM T = -40C to +85C 99.2 A + A Disabled) intensity control enabled T = T to T 102.4 A MIN MAX T = +25C 57 110.2 A Supply Current f = 400kHz other digital SCL (Interface Running, PWM I inputs at V+ or GND PWM T = -40C to +85C 117.4 A + A Enabled) intensity control enabled T = T to T 122.1 A MIN MAX Input High Voltage 0.7 x V V IH SDA, SCL, AD0, BLINK, RST V+ Input Low Voltage 0.3 x V V IL SDA, SCL, AD0, BLINK, RST V+ Input Leakage Current I , I 0 input voltage 5.5V -0.2 +0.2 A IH IL SDA, SCL, AD0, BLINK, RST Input Capacitance 8pF SDA, SCL, AD0, BLINK, RST 2 MAX6964