SAMHOP Microelectronics Corp.
SM16706P/SP/F/FN
16-BIT CONSTANT CURRENT LED DRIVER
TRUTH TABLE
…
…
CLOCK LATCH
ENABLE
SERIAL-IN
OUT0
OUT7
OUT15
SERIAL-OUT
…
…
UP
UP
UP
DOWN
DOWN
H
L
H
X
X
L
L
L
L
H
Dn
Dn
Dn - 7
Dn - 15
Dn - 15
Dn - 14
Dn - 13
Dn - 13
Dn - 13
Dn + 1
Dn + 2
Dn + 3
Dn + 3
No change
…
…
…
Dn + 2
Dn + 2
Dn - 5
Dn - 5
Dn - 13
Dn - 13
…
Off
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
2. LATCH terminal
VDD
VDD
RIN(Up)
ENABLE
GND
LATCH
GND
RIN(Down)
3. CLOCK, SERIAL-IN terminal
4. SERIAL-OUT terminal
VDD
VDD
CLOCK,
SERIAL-OUT
SERIAL-IN
GND
GND
Page 3
V.2.0 MAY,2003
SAMHOP [ SAMHOP MICROELECTRONICS CORP. ]
