LMK04031BISQ National Semiconductor, LMK04031BISQ Datasheet - Page 42

• Manufacturer Part Number: LMK04031BISQ
• Manufacturer: National Semiconductor

Specifications of LMK04031BISQ

• Operating Temperature (max): 85C
• Operating Temperature (min): -40C
• Pin Count: 48
• Mounting: Surface Mount
• Lead Free Status / RoHS Status: Not Compliant

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Note 44: Dynamic power dissipation of LVCMOS buffer varies with output frequency and can be found in the LVCMOS dynamic I
in
CLKoutXa and CLKoutXb are each considered an LVCMOS buffer.
Note 45: 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 46: 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
Entire device
(Single input
clock
(CLKIN_SEL = 0
or 1); LOS
disabled; PLL1
and PLL2 locked;
Fout disabled; All
CLKouts are on;
No delay); Divide
> 2 on each
output.
Section 13.1 CLOCK OUTPUT AC
44)
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 high 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
LMK0400x
LMK0401x
LMK0403x
TABLE 31. Typical Current Consumption for Selected Functional Blocks
(Note
(Note
(Note
CHARACTERISTICS. Total power dissipation of the LVCMOS buffer is the sum of static and dynamic power dissipation.
45,
45,
45,
Note
Note
Note
CC
, C
CC
46)
46)
46)
L
, C
= 5 pF
L
= 5 pF, CLKout = 100
42
(Temp = 25 °C,
V
Typical I
CC
379.5
377.5
337.1
(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
16
0
0
0
CC
Dissipated in
device
Power
(mW)
1102
1012
380
996
14
12
33
33
17
28
19
33
48
64
82
47
15
53
0
0
0
CC
vs frequency plot, as shown
2VPECL Emitter
Dissipated in
Resistors
LVPECL/
Power
(mW)
150
250
100
50
25
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-