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TT1668 Datasheet(PDF) 3 Page - Tontek Design Technology

Part # TT1668
Description  LED Driver with Key Scan Function
PDF  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 
I 
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 
P 
Power Supply
SEG1/KS1 ~ 
SEG10/KS10 
O 
Segment Output Pins (p‐channel, open drain)
Also acts as the Key Source 
SEG12/GR7 ~ 
SEG14/GR5 
 
Segment / Grid Output Pins
 
GND 
P 
Ground Pin 
GR4 ~ GR1 
O 
Grid Output Pins
Equivalent Circuits for Inputs and Outputs



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