MAX6978AUE+T Maxim Integrated, MAX6978AUE+T Datasheet
MAX6978AUE+T
Specifications of MAX6978AUE+T
Related parts for MAX6978AUE+T
MAX6978AUE+T Summary of contents
Page 1
... Marquee Displays Point-of-Order Signs Traffic Signs Gaming Features Architectural Lighting ________________________________________________________________ Maxim Integrated Products For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. o 25Mb Industry-Standard 4-Wire Serial Interface 5.5V Logic Supply o 8 Constant-Current LED Outputs Rated at 5 ...
Page 2
Constant-Current LED Driver with LED Fault Detection and Watchdog ABSOLUTE MAXIMUM RATINGS Voltage (with respect to GND) V+ ............................................................................-0.3V to +6V OUT_ .......................................................................-0.3V to +6V DIN, CLK, LE, OE, SET ................................-0.3V to (V+ + 0.3V) DOUT Current ..................................................................±10mA ...
Page 3
Constant-Current LED Driver with LED Fault Detection and Watchdog 5V TIMING CHARACTERISTICS (Typical Operating Circuit 4.5V to 5.5V, T PARAMETER SYMBOL CLK Clock Period CLK Pulse-Width High CLK Pulse-Width Low DIN Setup Time DIN Hold Time ...
Page 4
Constant-Current LED Driver with LED Fault Detection and Watchdog 3.3V TIMING CHARACTERISTICS (Typical Operating Circuit 5.5V, T PARAMETER SYMBOL CLK Clock Period CLK Pulse-Width High CLK Pulse-Width Low DIN Setup Time DIN Hold Time ...
Page 5
Constant-Current LED Driver with LED Fault Detection and Watchdog (T = +25°C, unless otherwise noted.) A SUPPLY CURRENT vs. SUPPLY VOLTAGE (INTERFACE IDLE, ALL OUTPUTS ON 360Ω) SET +125° +85°C A ...
Page 6
Constant-Current LED Driver with LED Fault Detection and Watchdog PIN NAME 1 GND Ground 2 DIN Serial-Data Input. Data is loaded into the internal 8-bit shift register on CLK’s rising edge. 3 CLK Serial-Clock Input. Data is loaded ...
Page 7
Constant-Current LED Driver with LED Fault Detection and Watchdog Detailed Description The MAX6978 LED driver comprises a 4-wire serial interface driving eight constant-current sinking open- drain output ports. The outputs drive LEDs in either sta- tic or multiplex ...
Page 8
Constant-Current LED Driver with LED Fault Detection and Watchdog OE is independent of the operation of the serial inter- face. Data can be shifted into the serial-interface shift register and latched regardless of the state of OE. DOUT ...
Page 9
Constant-Current LED Driver with LED Fault Detection and Watchdog LE t LRF OUT_ LE t LRR OUT_ CLK t CRF OUT_ CLK t CRR OUT_ Figure 3. LE and CLK to OUT_ Timing tain the same data (validating ...
Page 10
Constant-Current LED Driver with LED Fault Detection and Watchdog NO. OF PART OUTPUTS MAX6968 MAX6977 8 MAX6978 MAX6970 8 MAX6981 MAX6980 MAX6969 MAX6984 16 MAX6979 MAX6971 16 MAX6982 MAX6983 +5V µC V+ SCLK CLK MOSI DIN MISO DOUT ...
Page 11
Constant-Current LED Driver with LED Fault Detection and Watchdog (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information www.maxim-ic.com/packages ______________________________________________________________________________________ Package Information PACKAGE ...
Page 12
Constant-Current LED Driver with LED Fault Detection and Watchdog (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information www.maxim-ic.com/packages ...
Page 13
... Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________ 13 © 2005 Maxim Integrated Products ...