Part # MAX6971 datasheet

Part Manufacturer: Maxim


Part Description: MAX6971 DS

Part Details:

19-3808; Rev 1; 10/07 16-Port, 36V Constant-Current LED Driver MAX6971 General Description Features The MAX6971 serial-interfaced LED driver provides 16 25Mb, Industry-Standard, 4-Wire Serial Interface open-drain, constant-current-sinking LED driver outputsrated at 36V. The MAX6971 operates from a 3V to 5.5V 3V to 5.5V Logic Supply supply. The MAX6971 supply and the LEDs supply or 16 Constant-Current LED Outputs Rated at 36V supplies can power up in any order. The constant-cur-rent outputs are programmed together to up to 55mA Up to 55mA Continuous Current per Output using a single external resistor. The MAX6971 operates Output Current Programmed by Single Resistor with a 25Mb, industry-standard, 4-wire serial interface. 3% Current Matching Between Outputs The MAX6971 uses the industry-standard, shift-register-plus-latch-type serial interface. The driver accepts data 6% Current Matching Between ICs shifted into a 16-bit shift register using data input DIN High-Dissipation, 24-Pin Packages and clock input CLK. Input data appears at the DOUToutput 16 clock cycles later to allow cascading of multi- -40°C to +125°C Temperature Range ple MAX6971s. The latch-enable input, LE, loads the 16bits of shift register data into a 16-bit output latch to setwhich LEDs are on and which are off. The output-enable, OE, gates all 16 outputs on and off, and is fastenough to be used as a PWM input for LED intensity Ordering Information control. PART TEMP RANGE PIN-PACKAGE For applications requiring LED fault detection, refer tothe MAX6983, which automatically detects open-circuit MAX6971AUG -40°C to +125°C 24 TSSOP LEDs. MAX6971ANG -40°C to +125°C 24 Narrow PDIP For safety-related applications requiring a watchdogtimer, refer to the MAX6983, which includes a fail-safefeature that blanks the display if the serial interface Typical Application Circuit and Selector Guide appear at becomes inactive for more than 1s. end of data sheet. The MAX6971 is one of a family of 12 shift-register-plus-latch-type LED drivers. The family includes 8-port and16-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 arespecified over the -40°C to +125°C temperature range. TOP VIEW GND 1 24 V+ DIN 2 23 SET Applications CLK 3 22 DOUT

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MAX6971.pdf Datasheet