SAMHOP Microelectronics Corp.
16-BIT CONSTANT CURRENT LED DRIVER
SM16706P/SP/F/FN
TRUTH TABLE
CLOCK
UP
UP
UP
DOWN
DOWN
LATCH
H
L
H
X
X
ENABLE
L
L
L
L
H
SERIAL-IN
D
n
D
n + 1
D
n + 2
D
n + 3
D
n + 3
OUT0
…
OUT7
…
OUT15
D
n
…
D
n - 7
…
D
n - 15
No change
D
n + 2
…
D
n - 5
…
D
n - 13
D
n + 2
…
D
n - 5
…
D
n - 13
Off
SERIAL-OUT
D
n - 15
D
n - 14
D
n - 13
D
n - 13
D
n - 13
Note : 1.OUT0~15=on when Dn="H" ; OUT0~15=off when Dn="L".
2. In order to ensure that the level of the power supply voltage is correct, an external resistor
must be connected betwen R-EXT and GND.
EQUIVALENT CIRCUIT OF INPUTS AND OUTPUTS
1. ENABLE terminal
V
DD
R
IN
(Up)
2. LATCH terminal
V
DD
ENABLE
LATCH
R
IN
(Down)
GND
GND
3. CLOCK, SERIAL-IN terminal
V
DD
CLOCK,
SERIAL-IN
GND
4. SERIAL-OUT terminal
V
DD
SERIAL-OUT
GND
Page 3
V.2.0 MAY,2003
SAMHOP [ SAMHOP MICROELECTRONICS CORP. ]
