LMK04803_14 Datasheet, PDF (66/139 Pages) Texas Instruments – Low-Noise Clock Jitter Cleaner

LMK04803, LMK04805, LMK04806, LMK04808
SNAS489K – MARCH 2011 – REVISED DECEMBER 2014
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8.6.3.3 Register R10
8.6.3.3.1 OSCout1_LVPECL_AMP, LVPECL Output Amplitude Control
The OSCout1 clock output can only be used as an LVPECL output type. OSCout1_LVPECL_AMP sets the
LVPECL output amplitude of the OSCout1 clock output.
R10[31:30]
0 (0x00)
1 (0x01)
2 (0x02)
3 (0x03)
Table 31. OSCout1_LVPECL_AMP, 2 Bits
OUTPUT FORMAT
LVPECL (700 mVpp)
LVPECL (1200 mVpp)
LVPECL (1600 mVpp)
LVPECL (2000 mVpp)
8.6.3.3.2 OSCout0_TYPE
The OSCout0 clock output has a programmable output type. The OSCout0_TYPE register sets the output type to
LVDS, LVPECL, LVCMOS, or powers down the output buffer. Note that LVPECL supports four different
amplitude levels and LVCMOS supports dual and single LVCMOS outputs with inverted, and normal polarity of
each output pin for maximum flexibility.
To turn on the output, the OSCout0_TYPE must be set to a non-power down setting and enabled with
EN_OSCoutX, OSCout Output Enable.
Table 32. OSCout0_TYPE, 4 Bits
R10[27:24]
0 (0x00)
1 (0x01)
2 (0x02)
3 (0x03)
4 (0x04)
5 (0x05)
6 (0x06)
7 (0x07)
8 (0x08)
9 (0x09)
10 (0x0A)
11 (0x0B)
12 (0x0C)
13 (0x0D)
14 (0x0E)
DEFINITION
Powerdown
LVDS
LVPECL (700 mVpp)
LVPECL (1200 mVpp)
LVPECL (1600 mVpp)
LVPECL (2000 mVpp)
LVCMOS (Norm/Inv)
LVCMOS (Inv/Norm)
LVCMOS (Norm/Norm)⁽¹⁾
LVCMOS (Inv/Inv)⁽¹⁾
LVCMOS (Low/Norm)⁽¹⁾
LVCMOS (Low/Inv)⁽¹⁾
LVCMOS (Norm/Low)⁽¹⁾
LVCMOS (Inv/Low)⁽¹⁾
LVCMOS (Low/Low)⁽¹⁾
(1) To reduce supply switching and crosstalk noise, it is recommended to use a complementary LVCMOS output type such as 6 or 7. See
Vcc2, Vcc3, Vcc10, Vcc11, Vcc12, Vcc13 (CLKout Vccs) for more information"
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