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參數(shù)資料
| 型號(hào)： | ST2221C |
| 廠商： | Electronic Theatre Controls, Inc. |
| 元件分類(lèi)： | LED驅(qū)動(dòng)器 |
| 英文描述： | 16 BIT CONSTANT CURRENT LED DRIVERS |
| 中文描述： | 16位恒流LED驅(qū)動(dòng) |
| 文件頁(yè)數(shù)： | 4/17頁(yè) |
| 文件大?。?/td> | 471K |
| 代理商： | ST2221C |
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ST2221C
16-Bit Constant Current LED Drivers
-
3
-
Version
：
1.01
Timing Diagram
(Note) Latches are level sensitive (not edge triggered).
LATCH-terminal = H level, latches become transparent; LATCH-terminal = L level, latches hold data.
ENABLE-terminal = H level, all outputs (OUT0~15) are off.
An external resistor is connected between R-EXT and GND for setting up the value of constant current.
SERIAL-OUT changes state on the falling edges of clock.
Pin Description
PIN No.
1
2
3
4
5~20
21
22
23
24
PIN NAME
GND
SERIAL-IN
CLOCK
LATCH
OUT0~15
ENABLE
SERIAL-OUT
R-EXT
V
DD
FUNCTION
Ground terminal
Input terminal of a data shift register
Input terminal of a clock for shift register
Input terminal of data strobe
Output terminals
Input terminal of output enable (active low)
Output terminal of a data shift register
Input terminal of an external resistor
5V Supply voltage terminal
OUT15
SERIAL-OUT
OUT2
OUT1
OUT0
LATCH
0V
5V
0V
5V
SERIAL-IN
CLOCK
0V
5V
5V
Off
0V
Off
Off
On
Off
On
0V
5V
On
1
2
3
15
16
ENABLE
On
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