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TT1668 Datasheet(PDF) 3 Page - Tontek Design Technology

Part # TT1668
Description  LED Driver with Key Scan Function
Download  14 Pages
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Manufacturer  TONTEK [Tontek Design Technology]
Direct Link  http://www.tontek.com.tw
Logo TONTEK - Tontek Design Technology

TT1668 Datasheet(HTML) 3 Page - Tontek Design Technology

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Preliminary
TT1628 / TT1668
2014/9/10
Page:3/14
Ver.:2.3
.
Pin Description
Pin Name 
I/O 
Pin Description
DIO 
I/O 
Data Input Pin : This pin inputs serial data at the rising edge of the shift clock 
(starting from the lower bit) 
Data Output Pin (N‐Channel, Open‐Drain) 
CLK I 
Clock Input Pin This pin reads serial data at the rising edge and outputs data at 
the falling edge. 
STB 
Serial Interface Strobe Pin
The data input after the STB has fallen is processed as a command. When this 
pin is HIGH", CLK is ignored. 
K1 ~ K2 
 
 
Key Data Input Pins
The data sent to these pins are latched at the end of the display 
cycle. (Internal Pull‐Low Resistor) 
VDD 
Power Supply
SEG1/KS1 ~ 
SEG10/KS10 
Segment Output Pins (p‐channel, open drain)
Also acts as the Key Source 
SEG12/GR7 ~ 
SEG14/GR5 
 
Segment / Grid Output Pins
 
GND 
Ground Pin 
GR4 ~ GR1 
Grid Output Pins
Equivalent Circuits for Inputs and Outputs


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