L2042A Datasheet, PDF (2/10 Pages) Alliance Semiconductor Corporation – 2.5V LCD Panel Reduction IC

October 2003
rev 1.0
Pin Configuration
XIN /CLK ¹
CP0 2
CP1 3
L2042A
VSS 4
8 VDD
7 SR0
6 _ModOUT
5 SSON#
L2042A
Pin Description
Pin#
1
2
3
4
Pin Name
CLK IN
CP0
CP1
VSS
6
SSON#
7
ModOUT
5
SR0
8
VDD
Type
I
I
I
P
I
O
I
P
Description
External reference frequency input. Connect to an externally generated
reference signal.
Digital logic input used to select charge pump current. Refer Modulation
Selection Table. This pin has an internal pull-up resistor.
Digital logic input used to select charge pump current. Refer Modulation
Selection Table. This pin has an internal pull-up resistor.
Ground to entire chip. Connect to system ground.
Digital logic input used to enable Spread Spectrum function (Active LOW).
Spread Spectrum function enabled when LOW, disabled when HIGH. This
pin has an internal pull-low resistor.
Spread spectrum clock output.
Digital logic input used to select Spreading Range Refer Modulation
Selection Table. This pin has an internal pull-up resistor.
Power supply for the entire chip (+2.5V or 3.3V)
Modulation Selection Table
CP0 CP1
SR0
Spreading Range (± %)
32.5MHz
54MHz
65MHz
0
0
0
0.49
0.92
0.88
0
0
1
1.71
1.48
1.37
0
1
0
1.2
0.92
0.88
0
1
1
1.69
1.48
1.37
1
0
0
1.09
0.71
0.58
1
0
1
1.68
1.14
0.9
1
1
0
0.8
0.4
0.3
1
1
1
1.29
0.62
0.48
70MHz
0.87
1.32
0.84
1.33
0.42
0.73
0.25
0.37
Modulation Rate
(F_IN/40) * 62.49 KHz
2.5V LCD Panel EMI Reduction IC
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