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LD1970 データシート(PDF) 3 Page - LDT Co., Ltd

部品番号 LD1970
部品情報  16 SEGMENT X 12 GRID VFD DRIVER
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メーカー  LDT [LDT Co., Ltd]
ホームページ  http://www.ldt.co.kr/
Logo LDT - LDT Co., Ltd

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Ver 4.0
3
LD1970
16 Segment x 12 Grid VFD Driver with Key Scan
Pin Description
Pin name
Type
Description
Pin No.
QFN
LQFP,MQFP
LED1 ~ LED4
O
LED Output Pin
1~4
1~4
OSC
I/O
Oscillator I/O Pin
A resistor is connected to this pin to determine the oscillation frequency.
5
5
DOUT
O
Data Output Pin (N-Channel, Open-Drain)
This pin outputs serial data at the falling edge of the shift clock
(starting from the lower bit)
7
6
DIN
(Schmitt Trigger)
I
Data Input Pin
This pin inputs serial data at the rising edge of the shift clock
(starting from the lower bit)
8
7
CLK
(Schmitt Trigger)
I
Clock Input Pin
This pin reads serial data at the rising edge and outputs data at the falling
edge of the shift clock
9
8
STB
(Schmitt Trigger)
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.
10
9
K1, K2
I
Key Data Input Pins
The data inputted to these pins is latched at the end of the display cycle.
11,12
10,11
VSS
G
Logic Ground Pin
13,48
12,44
VDD1, VDD2
P(+)
Logic Positive Power Pin
47,14
43, 13
SG1/KS1 ~
SG16/KS16
O
High-Voltage Segment Output Pins, Also acts as the Key Source.
15~32
14~29
VEE
P(-)
Pull-Down Level / Negative Power Pin
33
30
SG17/GR12 ~
SG24/GR5
O
High-Voltage Segment/Grid Output Pins
34~41
31~38
GR1~GR4
O
High-Voltage Grid Output Pins
43~46
39~42


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