HT1668 Datasheet | ART CHIP

HT1668 LED Driver IC DESCRIPTION HT1668 is an LED Controller driven on a 1/7to 1/8 duty factor. Eleven segment output lines, six grid output lines, 1 segment/grid output lines, one display memory, control circuit , key scan circuit are all incorporated into a single chip to build a highly reliable peripheral device for a single chip microputer. Serial data is fed to HT1668 via a four-line serial interface. Housed in a 24-pin SO Package, HT1668 pin assignments and application circuit are optimized for easy PCB Layout and cost saving advantages. Features CMOS Technology Low Power Consumption Multiple Display Modes Key Scanning 8-Step Dimming Circuitry Serial Interface for Clock, Data Input, Data Output, Strobe Pins Available in 24-Pin, SOP Package APPLICATION Micro-puter Peripheral Device VCR set bi set BLOCK DIAGRAM DI/O CLK STB Serial Data Interface Control Dispaly Memory Timing Generator Key Matrix Memory SEGMENT DRIVER/ KEY SCAN OUTPUT/ GRID DRIVER SG1/KS1 SG2/KS2 SG3/KS3 SG4/KS4 SG5/KS5 SG6/KS6 SG7/KS7 SG8/KS8 SG9/KS9 SG10/KS10 SG12/GR7 SG13/GR6 SG14/GR5 GR4 GR3 GR2 GR1 K1 K2 Dimming Circuit VDD GND .artschip. HT1668 LED Driver IC INPUT/OUTPUT CONFIGURATIONS The schematic diagrams of the input and output circuits of the logic section are shown below. Input Pins: CLK, STB & DIN Input Pins: K1 to K2 Output Pins: DOUT, GR1 to GR4 Output Pins: SG1 to SG10 Output Pins: GR5, GR6 and SG12/GR7 GND VDD GND VDD .artschip. PIN CONFIGURATION HT1668 LED Driver...