MAX6965 19-3058 Rev 3 3/05 9-Output LED Driver with Intensity Control and Hot-Insertion Protection General Description Features 2 400kbps, 2-Wire Serial Interface, 5.5V Tolerant The MAX6965 I C-compatible serial interfaced periph- eral provides microprocessors with nine additional out- 2V to 3.6V Operation put ports. Each output is an open-drain current-sinking Overall 8-Bit PWM LED Intensity Control output rated to 50mA at 7V. All outputs are capable of Global 16-Step Intensity Control driving 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 Serial Interface and Restores to provide coarse adjustment of current from fully off to Power-Up Default State fully on with 14 intensity steps. Additionally each output Supports Hot Insertion then has an individual 4-bit control, which further Outputs are 7V-Rated Open Drain divides the globally set current into 16 more steps. Low Standby Current (1.2A (typ), 3.3A (max)) Alternatively, the current control can be configured as a Tiny 3mm x 3mm, Thin QFN Package single 8-bit 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 off during either blink phase, or to ignore the blink control. Ordering Information The blink period is controlled by an external clock (up to TEMP PIN- TOP PKG 1kHz) on BLINK or by a register. The BLINK input can also PART RANGE PACKAGE MARK CODE be used as a logic control to turn the LEDs on and off, or as a general-purpose input (GPI). 16 Thin QFN -40C to MAX6965ATE 3mm x 3mm AAW T1633-4 The MAX6965 supports hot insertion. The SDA, SCL, +125C x 0.8mm RST, BLINK, and the slave address input AD0 remain high impedance in power-down (V+ = 0V) with up to 6V MAX6965AEE -40C to 16 QSOP asserted upon them. The output ports remain high impedance with up to 8V asserted upon them. 2 The MAX6965 is controlled through a 2-wire I C serial Typical Application Circuit 2 interface, and can be configured to one of four I C addresses. 3.3V 7V Applications 0.047F LCD Backlights LED Status Indication V+ Keypad Backlights C MAX6965 RGB LED Drivers O0 SDA SDA O1 SCL SCL O2 I/O BLINK O3 Pin Configurations appear at end of data sheet. I/O RST O4 O5 P., RELAY AD0 O6 oa O7 li- 6V RELAY O8 ne 2 I Cs. GND RELAY Maxim Integrated Products 1 For price, delivery, and to place orders, please contact Maxim Distribution at 1-888-629-4642, or visit Maxims website at www.maxim-ic.com. EVALUATION KIT AVAILABLE9-Output LED Driver 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 16-Pin QSOP (derate 8.3mW/C over +70C)..............666mW SCL, SDA, AD0, BLINK, RST ...................................-0.3V to +6V 16-Pin QFN (derate 14.7mW/C over +70C) ............1176mW O0O8 ......................................................................-0.3V to +8V Operating Temperature Range (T to T ) ...-40C to +125C MIN MAX DC Current on O0 to 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 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 7 12.1 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 13.3 A + A (Interface Idle, PWM Enabled) P WM i ntensity control enab l 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 T = T to T 122 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 Input = GND or V+ -0.2 +0.2 A IH IL SDA, SCL, AD0, BLINK, RST Input Capacitance 8pF SDA, SCL, AD0, BLINK, RST 2 MAX6965