MAX6969 19-3677 Rev 3 6/10 16-Port, 5.5V Constant-Current LED Driver General Description Features The MAX6969 serial-interfaced LED driver provides 16 25Mb, Industry-Standard, 4-Wire Serial Interface open-drain, constant-current-sinking LED driver outputs at 5V rated at 5.5V. The MAX6969 operates from a 3V to 5.5V 3V to 5.5V Logic Supply supply. The MAX6969 supply and the LEDs supply or supplies can power up in any order. The constant-cur- 16 Constant-Current LED Outputs Rated at 5.5V rent outputs are programmed together to up to 55mA Up to 55mA Continuous Current per Output using a single external resistor. The MAX6969 operates with a 25Mb, industry-standard, 4-wire serial interface. Output Current Programmed by Single Resistor The MAX6969 uses the industry-standard, shift-register- 3% Current Matching Between Outputs plus-latch-type serial interface. The driver accepts data shifted into a 16-bit shift register using data input DIN 6% Current Matching Between ICs and clock input CLK. Input data appears at the DOUT High-Dissipation, 24-Pin Packages output 16 clock cycles later to allow cascading of multi- ple MAX6969s. The latch-enable input, LE, loads the 16 -40C to +125C Temperature Range bits of shift register data into a 16-bit output latch to set which LEDs are on and which are off. The output- Ordering Information enable, OE, gates all 16 outputs on and off, and is fast enough to be used as a PWM input for LED intensity PART TEMP RANGE PIN-PACKAGE control. MAX6969AUG+ -40C to +125C 24 TSSOP For applications requiring LED fault detection, refer to MAX6969AWG+ -40C to +125C 24 Wide SO the MAX6984*, which automatically detects open-circuit MAX6969ANG+ -40C to +125C 24 PDIP LEDs. +Denotes a lead(Pb)-free/RoHS-compliant package. For safety-related applications requiring a watchdog timer, refer to the MAX6979, which includes a fail-safe Typical Application Circuit and Selector Guide appear at feature that blanks the display if the serial interface end of data sheet. becomes inactive for more than 1s. The MAX6969 is one of a family of 12 shift-register-plus- latch-type LED drivers. The family includes 8-port and 16-port types, with 5.5V- or 36V-rated LED outputs, with Pin Configuration and without open-circuit LED detection and watchdog. All versions operate from a 3V to 5.5V supply, and are specified over the -40C to +125C temperature range. TOP VIEW GND 1 24 V+ DIN 2 23 SET Applications CLK 3 22 DOUT Variable Message Signs LE 4 21 OE Marquee Displays MAX6969AUG OUT0 5 20 OUT15 MAX6969ANG Point-of-Order Signs OUT1 6 19 OUT14 MAX6969AWG Traffic Signs OUT2 7 18 OUT13 OUT3 8 17 OUT12 Gaming Features OUT4 9 16 OUT11 Architectural Lighting OUT5 10 15 OUT10 OUT6 11 14 OUT9 *Future productcontact factory for availability. OUT7 12 13 OUT8 TSSOP/PDIP/SO Maxim Integrated Products 1 For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxims website at www.maxim-ic.com. EVALUATION KIT AVAILABLE16-Port, 5.5V Constant-Current LED Driver ABSOLUTE MAXIMUM RATINGS Voltage with respect to GND. Continuous Power Dissipation (T = +70C) A V+ ............................................................................-0.3V to +6V 24-Pin TSSOP (derate 12.2mW/C over +70C) ..........975mW OUT .......................................................................-0.3V to +6V 24-Pin PDIP (derate 13.3mW/C over +70C)............1067mW DIN, CLK, LE, OE, SET ................................-0.3V to (V+ + 0.3V) 24 Wide SO (derate 11.8mW/C over +70C)..............941mW DOUT Current ..................................................................10mA Operating Temperature Range .........................-40C to +125C OUT Sink Current .............................................................60mA Junction Temperature......................................................+150C Total GND Current ...........................................................480mA Storage Temperature Range .............................-65C to +150C Lead Temperature (soldering, 10s) .................................+300C Soldering Temperature (reflow) .......................................+260C 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 Application Circuit, V+ = 3V to 5.5V, T = T to T , unless otherwise noted. Typical values are at V+ = 5V, T = +25C.) A MIN MAX A (Note 1) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Operating Supply Voltage V+ 3.0 5.5 V Output Voltage V 5.5 V OUT Standby Current All logic inputs at V+ or GND, DOUT (Interface Idle, All Output Ports I 5.7 8 mA + unloaded High Impedance, R = 360 ) SET Standby Current (Interface Running, All Output f = 5MHz, OE = V+, DIN and LE = V+ CLK I 6 8.5 mA + Ports High Impedance, or GND, DOUT unloaded R = 360 ) SET Supply Current All logic inputs at V+ or GND, (Interface Idle, All Output Ports I 18 25 mA + DOUT unloaded Active Low, R = 360 ) SET Input High Voltage 0.7 x V V IH DIN, CLK, LE, OE V+ Input Low Voltage 0.3 x V V IL DIN, CLK, LE, OE V+ Hysteresis Voltage V 0.8 V I DIN, CLK, LE, OE Input Leakage Current I , I -1 +1 A IH IL DIN, CLK, LE, OE V + Output High-Voltage DOUT V I = 4mA V OH SOURCE - 0.5V Output Low Voltage V I = 4mA 0.5 V OL SINK V+ = 3V to 5.5V, V = 0.5V to 2.5V, OUT Output Current OUT I 37 50 61 mA OUT R = 360 SET Output Leakage Current OUT I OE = V+, OUT = V+ 1 A LEAK 2 MAX6969