lmk04000bisqx National Semiconductor Corporation, lmk04000bisqx Datasheet - Page 38

• Manufacturer Part Number: lmk04000bisqx
• Description: Lmk04000 Family Of Precision Clock Conditioners Low-noise Clock Jitter Cleaner With Cascaded Plls
• Manufacturer: National Semiconductor Corporation

www.national.com
Note 40: Dynamic power dissipation of LVCMOS buffer varies with output frequency and can be found in the LVCMOS dynamic I
in page 20.
Note 41: Assuming ThetaJ = 27.4 °C/W, the total power dissipated on chip must be less than 40/27.4 = 1450 mW to guarantee a junction temperature is less
than 125 °C.
Note 42: Worst case power dissipation can be estimated by multiplying typical power dissipation with a factor of 1.2.
Block
Entire device,
core current
REFMUX
LOS
Low Channel
Internal Buffer
High Channel
Internal Buffer
Divide circuitry
per output
Delay circuitry
per output
Fout Buffer
LVDS Buffer
LVPECL/
2VPECL Buffer
LVCMOS Buffer
(Note 40)
Entire device
(Single input
clock
(CLKIN_SEL = 0
or 1); LOS
disabled; PLL1
and PLL2 locked;
Fout disabled; All
CLKouts are on;
No delay)
Condition
Single input clock (CLKIN_SEL = 0 or 1); LOS
disabled; PLL1 and PLL2 locked; All CLKouts are off;
No LVPECL emitter resistors connected
Enable auto-switch mode (CLKIN_SEL = 2 or 3)
Enable LOS (LOS_TYPE = 1, or 2, or 3)
The low channel internal buffer is enabled when
CLKout0 is enabled
The low channel internal buffer is enabled when one of
CLKout1 through CLKout4 is enabled
Divider bypassed (CLKout_MUX = 0, 2)
Divider enabled, divide = 2 (CLKout_MUX = 1, 3)
Divider enabled, divide > 2 (CLKout_MUX = 1, 3)
Delay bypassed (CLKout_MUX = 0, 1)
Delay enabled, delay < 8 (CLKout_MUX = 2, 3)
Delay enabled, delay > 7 (CLKout_MUX = 2, 3)
EN_Fout = 1
LVDS buffer, enabled
LVPECL/2VPECL buffer (enabled and with 120 Ω
emitter resistors)
LVPECL/2VPECL buffer (disabled and with 120 Ω
emitter resistors)
LVPECL/2VPECL (disabled and with no emitter
resistors)
LVCMOS buffer static I
LVCMOS buffer dynamic I
MHz
LMK0401x (Notes 41, 42)
LMK0403x (Notes 41, 42)
TABLE 31. Typical Current Consumption for Selected Functional Blocks
CC
, C
CC
L
, C
= 5 pF
L
= 5 pF, CLKout = 250
38
(Temp = 25 °C,
V
Typical I
CC
377.5
359.1
(mA)
14.5
19.3
21.7
115
= 3.3 V)
4.3
3.6
5.3
8.5
5.8
9.9
4.5
10
10
40
27
0
0
0
CC
Dissipated in
device
Power
(mW)
1085
380
996
14
12
33
33
17
28
19
33
48
64
82
47
15
89
0
0
0
CC
vs frequency plot, as shown
2VPECL Emitter
Dissipated in
Resistors
LVPECL/
Power
(mW)
250
100
50
25
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-