MPC961CACR2 [NXP]

961 SERIES, PLL BASED CLOCK DRIVER, 17 TRUE OUTPUT(S), 0 INVERTED OUTPUT(S), PQFP32, PLASTIC, LQFP-32;
MPC961CACR2
型号: MPC961CACR2
厂家: NXP    NXP
描述:

961 SERIES, PLL BASED CLOCK DRIVER, 17 TRUE OUTPUT(S), 0 INVERTED OUTPUT(S), PQFP32, PLASTIC, LQFP-32

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Freescale Semiconductor, Inc.  
SEMICONDUCTOR TECHNICAL DATA  
Order this document  
by MPC961C/D  
The MPC961 is a 2.5V or 3.3V compatible, 1:18 PLL based zero delay  
buffer. With output frequencies of up to 200MHz, output skews of 150ps  
the device meets the needs of the most demanding clock tree  
applications.  
LOW VOLTAGE  
Fully Integrated PLL  
ZERO DELAY BUFFER  
Up to 200MHz I/O Frequency  
LVCMOS Outputs  
Outputs Disable in High Impedance  
LVCMOS Reference Clock Options  
LQFP Packaging  
±50ps Cycle–Cycle Jitter  
150ps Output Skews  
The MPC961 is offered with two different input configurations. The  
MPC961C offers an LVCMOS reference clock while the MPC961P offers  
an LVPECL reference clock.  
FA SUFFIX  
32–LEAD LQFP PACKAGE  
CASE 873A–02  
When pulled high the OE pin will force all of the outputs (except QFB)  
into a high impedance state. Because the OE pin does not affect the QFB  
output, down stream clocks can be disabled without the internal PLL  
losing lock.  
The MPC961 is fully 2.5V or 3.3V compatible and requires no external  
loop filter components. All control inputs accept LVCMOS compatible  
levels and the outputs provide low impedance LVCMOS outputs capable  
of driving terminated 50 transmission lines. For series terminated lines  
the MPC961 can drive two lines per output giving the device an effective  
fanout of 1:36. The device is packaged in a 32 lead LQFP.  
Q0  
Q1  
Q2  
Q3  
PLL  
CCLK  
FB_IN  
Ref  
100 – 200 MHz  
O
1
50k  
50k  
50 – 100 MHz  
FB  
Q14  
Q15  
Q16  
F_RANGE  
OE  
50k  
50k  
QFB  
The MPC961C requires an external RC filter for the analog power supply pin V . Please see applications section for details.  
CCA  
Figure 1. MPC961C Logic Diagram  
03/01  
Motorola, Inc. 2001  
For More Information On This Product,  
Go to: www.freescale.cRoEmV 1  
Freescale Semiconductor, Inc.  
MPC961C  
24 23 22 21 20 19 18 17  
25  
26  
27  
28  
29  
30  
31  
32  
16  
15  
14  
13  
12  
11  
10  
9
VCC  
Q12  
Q13  
Q14  
GND  
Q15  
Q16  
QFB  
Q5  
Q4  
Q3  
GND  
MPC961C  
Q2  
Q1  
Q0  
VCC  
1
2
3
4
5
6
7
8
Figure 2. 32–Lead Pinout (Top View)  
Table 1: PIN CONFIGURATIONS  
Pin  
I/O  
Input  
Type  
Function  
CCLK  
FB_IN  
LVCMOS  
PLL reference clock signal  
Input  
LVCMOS  
LVCMOS  
LVCMOS  
LVCMOS  
LVCMOS  
Ground  
PLL feedback signal input, connect to a QFB output  
PLL frequency range select  
F_RANGE  
OE  
Input  
Input  
Output enable/disable  
Q0 - Q16  
QFB  
Output  
Output  
Supply  
Supply  
Clock outputs  
PLL feedback signal output, connect to a FB_IN  
Negative power supply  
GND  
VCCA  
VCC  
PLL positive power supply (analog power supply). The MPC961C requires  
an external RC filter for the analog power supply pin V  
plications section for details.  
. Please see ap-  
CCA  
VCC  
NC  
Supply  
VCC  
Positive power supply for I/O and core  
Not connected  
Table 2: FUNCTION TABLE  
Control  
Default  
0
1
F_RANGE  
0
PLL high frequency range. MPC961C input reference  
and output clock frequency range is 100 – 200 MHz  
PLL low frequency range. MPC961C input reference  
and output clock frequency range is 50 – 100 MHz  
OE  
0
Outputs enabled  
Outputs disabled (high–impedance state)  
For More Information On This Product,  
MOTOROLA  
2
TIMING SOLUTIONS  
DL207 — Rev 0  
Go to: www.freescale.com  
Freescale Semiconductor, Inc.  
MPC961C  
Table 3: ABSOLUTE MAXIMUM RATINGS*  
Symbol  
Parameter  
Min  
–0.3  
–0.3  
–0.3  
Max  
Unit  
V
V
V
V
Supply Voltage  
3.6  
CC  
DC Input Voltage  
DC Output Voltage  
DC Input Current  
DC Output Current  
V
V
+ 0.3  
V
IN  
CC  
+ 0.3  
V
OUT  
CC  
I
I
±20  
mA  
mA  
°C  
IN  
±50  
OUT  
T
Storage Temperature Range  
–40  
125  
S
* Absolute maximum continuous ratings are those values beyond which damage to the device may occur. Exposure to these conditions or  
conditions beyond those indicated may adversely affect device reliability. Functional operation under absolute–maximum–rated conditions is  
not implied.  
Table 4: DC CHARACTERISTICS (V  
CC  
= 3.3V ± 5%, T = –40° to 85°C)  
A
Symbol  
Characteristic  
Input HIGH Voltage  
Min  
2.0  
Typ  
Max  
V + 0.3  
CC  
Unit  
V
Condition  
LVCMOS  
LVCMOS  
V
IH  
V
V
V
Input LOW Voltage  
–0.3  
2.4  
0.8  
V
IL  
a
= –20mA  
Output HIGH Voltage  
V
I
OH  
OL  
OUT  
OH  
OL  
a
= 20mA  
Output LOW Voltage  
0.55  
20  
V
I
Z
Output Impedance  
14  
I
Input Current  
±120  
µA  
pF  
pF  
mA  
mA  
V
IN  
C
C
Input Capacitance  
4.0  
8.0  
2.0  
IN  
Power Dissipation Capacitance  
Maximum PLL Supply Current  
Maximum Quiescent Supply Current  
Output Termination Voltage  
10  
Per Output  
V Pin  
PD  
I
I
5.0  
CCA  
CC  
CCA  
All VCC Pins  
V
V
2
TT  
CC  
a. The MPC961C is capable of driving 50transmission lines on the incident edge. Each output drives one 50parallel terminated  
transmission line to a termination voltage of V . Alternatively, the device drives up two 50series terminated transmission lines.  
TT  
a
= 3.3V ± 5%, T = –40° to 85°C)  
A
Table 5: AC CHARACTERISTICS (V  
CC  
Symbol  
Characteristic  
Min  
Typ  
Max  
Unit  
Condition  
f
Input Frequency  
F_RANGE = 0  
F_RANGE = 1  
100  
50  
200  
100  
MHz  
ref  
f
Maximum Output Frequency  
F_RANGE = 0  
F_RANGE = 1  
100  
50  
200  
100  
MHz  
max  
f
Reference Input Duty Cycle  
TCLK Input Rise/Fall Time  
25  
75  
3.0  
120  
%
ns  
ps  
refDC  
t , t  
r f  
0.8 to 2.0V  
PLL locked  
t
(
Propagation Delay  
(static phase offset)  
CCLK to FB_IN  
–80  
)
b
t
Output–to–Output Skew  
90  
150  
ps  
%
sk(O)  
DC  
Output Duty Cycle  
F_RANGE = 0  
F_RANGE = 1  
42  
45  
50  
50  
55  
55  
O
t , t  
r f  
Output Rise/Fall Time  
Output Disable Time  
Output Enable Time  
Cycle–to–Cycle Jitter  
Period Jitter  
0.1  
1.0  
10  
10  
15  
10  
15  
10  
ns  
ns  
ns  
ps  
ps  
ns  
ms  
0.55 to 2.4V  
t
t
t
t
t
t
,
PLZ HZ  
,
PZL LZ  
c
RMS (1  
RMS (1  
RMS (1  
)
JIT(CC)  
)
)
7.0  
JIT(PER)  
I/O Phase Jitter  
JIT(  
lock  
)
Maximum PLL Lock Time  
a. AC characteristics apply for parallel output termination of 50 to V  
b. See applications section for part–to–part skew calculation  
TT  
c. See applications section for calculation for other confidence factors than 1  
For More Information On This Product,  
TIMING SOLUTIONS  
DL207 — Rev 0  
3
MOTOROLA  
Go to: www.freescale.com  
Freescale Semiconductor, Inc.  
MPC961C  
Table 6: DC CHARACTERISTICS (V  
= 2.5V ± 5%, T = –40° to 85°C)  
A
CC  
Symbol  
Characteristic  
Input HIGH Voltage  
Min  
1.7  
Typ  
Max  
V + 0.3  
CC  
Unit  
V
Condition  
LVCMOS  
LVCMOS  
V
IH  
V
V
V
Input LOW Voltage  
–0.3  
1.8  
0.7  
V
IL  
a
= –15mA  
Output HIGH Voltage  
V
I
OH  
OL  
OUT  
OH  
OL  
a
= 15mA  
Output LOW Voltage  
0.6  
26  
V
I
Z
Output Impedance  
18  
I
Input Current  
±120  
µA  
pF  
pF  
mA  
mA  
V
IN  
C
C
Input Capacitance  
4.0  
8.0  
2.0  
IN  
Power Dissipation Capacitance  
Maximum PLL Supply Current  
Maximum Quiescent Supply Current  
Output Termination Voltage  
10  
Per Output  
V Pin  
PD  
I
I
5.0  
CCA  
CCA  
All VCC Pins  
CC  
V
V
2
TT  
CC  
a. The MPC961C is capable of driving 50transmission lines on the incident edge. Each output drives one 50parallel terminated  
transmission line to a termination voltage of V . Alternatively, the device drives up two 50series terminated transmission lines.  
TT  
a
= 2.5V ± 5%, T = –40° to 85°C)  
A
Table 7: AC CHARACTERISTICS (V  
CC  
Symbol  
Characteristic  
Min  
Typ  
Max  
Unit  
Condition  
f
Input Frequency  
F_RANGE = 0  
F_RANGE = 1  
100  
50  
200  
100  
MHz  
ref  
f
Maximum Output Frequency  
F_RANGE = 0  
F_RANGE = 1  
100  
50  
200  
100  
MHz  
max  
refDC  
f
Reference Input Duty Cycle  
TCLK Input Rise/Fall Time  
25  
75  
3.0  
120  
%
ns  
ps  
t , t  
r f  
0.7 to 1.7V  
PLL locked  
t
(
Propagation Delay  
(static phase offset)  
CCLK to FB_IN  
–80  
)
b
t
Output–to–Output Skew  
90  
150  
ps  
%
sk(O)  
DC  
Output Duty Cycle  
F_RANGE = 0  
F_RANGE = 1  
40  
45  
50  
50  
60  
55  
O
t , t  
r f  
Output Rise/Fall Time  
Output Disable Time  
Output Enable Time  
Cycle–to–Cycle Jitter  
Period Jitter  
0.1  
1.0  
10  
10  
15  
10  
15  
10  
ns  
ns  
ns  
ps  
ps  
ns  
ms  
0.6 to 1.8V  
t
t
t
t
t
t
,
PLZ HZ  
,
PZL LZ  
c
RMS (1  
RMS (1  
RMS (1  
)
JIT(CC)  
)
)
7.0  
JIT(PER)  
I/O Phase Jitter  
JIT(  
lock  
)
Maximum PLL Lock Time  
a. AC characteristics apply for parallel output termination of 50 to V  
b. See applications section for part–to–part skew calculation  
TT  
c. See applications section for calculation for other confidence factors than 1  
For More Information On This Product,  
MOTOROLA  
4
TIMING SOLUTIONS  
DL207 — Rev 0  
Go to: www.freescale.com  
Freescale Semiconductor, Inc.  
MPC961C  
Power Supply Filtering  
adequate to eliminate power supply noise related problems  
in most designs.  
The MPC961C is a mixed analog/digital product and as  
such it exhibits some sensitivities that would not necessarily  
be seen on a fully digital product. Analog circuitry is naturally  
susceptible to random noise, especially if this noise is seen  
on the power supply pins. The MPC961C provides separate  
power supplies for the output buffers (V ) and the  
phase–locked loop (V  
CCA  
design technique is to isolate the high switching noise digital  
outputs from the relatively sensitive internal analog  
phase–locked loop. In a controlled environment such as an  
evaluation board this level of isolation is sufficient. However,  
in a digital system environment where it is more difficult to  
minimize noise on the power supplies a second level of  
isolation may be required. The simplest form of isolation is a  
Driving Transmission Lines  
The MPC961C clock driver was designed to drive high  
speed signals in a terminated transmission line environment.  
To provide the optimum flexibility to the user the output  
drivers were designed to exhibit the lowest impedance  
possible. With an output impedance of less than 15the  
drivers can drive either parallel or series terminated  
transmission lines. For more information on transmission  
lines the reader is referred to application note AN1091.  
CC  
) of the device. The purpose of this  
In most high performance clock networks point–to–point  
distribution of signals is the method of choice. In a  
point–to–point scheme either series terminated or parallel  
terminated transmission lines can be used. The parallel  
technique terminates the signal at the end of the line with a  
50resistance to VCC/2. This technique draws a fairly high  
level of DC current and thus only a single terminated line can  
be driven by each output of the MPC961C clock driver. For  
the series terminated case however there is no DC current  
draw, thus the outputs can drive multiple series terminated  
lines. Figure 4. illustrates an output driving a single series  
terminated line vs two series terminated lines in parallel.  
When taken to its extreme the fanout of the MPC961C clock  
driver is effectively doubled due to its capability to drive  
multiple lines.  
power supply filter on the V  
pin for the MPC961C.  
CCA  
Figure 3. illustrates a typical power supply filter scheme.  
The MPC961C is most susceptible to noise with spectral  
content in the 10kHz to 10MHz range. Therefore the filter  
should be designed to target this range. The key parameter  
that needs to be met in the final filter design is the DC voltage  
drop that will be seen between the V  
pin of the MPC961C. From the data sheet the I  
(the current sourced through the V  
(5mA maximum), assuming that a minimum of 2.375V (V  
supply and the V  
CC  
CCA  
current  
CCA  
pin) is typically 2mA  
CCA  
=
CC  
3.3V or V  
= 2.5V) must be maintained on the V  
pin.  
The resistor R shown in Figure 3. must have a resistance of  
CC  
CCA  
F
270(V  
= 3.3V) or 5 to 15(V = 2.5V) to meet the  
CC  
CC  
voltage drop criteria. The RC filter pictured will provide a  
broadband filter with approximately 100:1 attenuation for  
noise whose spectral content is above 20kHz. As the noise  
frequency crosses the series resonant point of an individual  
capacitor it’s overall impedance begins to look inductive and  
thus increases with increasing frequency. The parallel  
capacitor combination shown ensures that a low impedance  
path to ground exists for frequencies well above the  
bandwidth of the PLL.  
MPC961  
OUTPUT  
BUFFER  
Z
= 50Ω  
O
R = 36Ω  
S
14  
IN  
IN  
OutA  
MPC961  
OUTPUT  
BUFFER  
Z
O
= 50Ω  
= 50Ω  
R = 36Ω  
S
OutB0  
OutB1  
R = 270for V = 3.3V  
F
F
CC  
14Ω  
R = 5–15for V = 2.5V  
CC  
Z
O
R = 36Ω  
S
R
F
VCCA  
VCC  
22 µF  
10 nF  
MPC961C  
Figure 4. Single versus Dual Transmission Lines  
VCC  
The waveform plots of Figure 5. show the simulation  
results of an output driving a single line vs two lines. In both  
cases the drive capability of the MPC961C output buffer is  
more than sufficient to drive 50transmission lines on the  
incident edge. Note from the delay measurements in the  
simulations a delta of only 43ps exists between the two  
differently loaded outputs. This suggests that the dual line  
driving need not be used exclusively to maintain the tight  
output–to–output skew of the MPC961C. The output  
waveform in Figure 5. shows a step in the waveform, this  
step is caused by the impedance mismatch seen looking into  
the driver. The parallel combination of the 36series resistor  
plus the output impedance does not match the parallel  
33...100 nF  
Figure 3. Power Supply Filter  
Although the MPC961C has several design features to  
minimize the susceptibility to power supply noise (isolated  
power and grounds and fully differential PLL) there still may  
be applications in which overall performance is being  
degraded due to system power supply noise. The power  
supply filter schemes discussed in this section should be  
For More Information On This Product,  
TIMING SOLUTIONS  
DL207 — Rev 0  
5
MOTOROLA  
Go to: www.freescale.com  
Freescale Semiconductor, Inc.  
MPC961C  
combination of the line impedances. The voltage wave  
launched down the two lines will equal:  
SPICE level and IBIS output buffer models are available  
for engineers who want to simulate their specific interconnect  
schemes.  
VL = VS ( Zo / (Rs + Ro +Zo))  
Zo = 50|| 50Ω  
Rs = 36|| 36Ω  
Using the MPC961C in zero-delay applications  
Ro = 14Ω  
Nested clock trees are typical applications for the  
MPC961C. Designs using the MPC961C as LVCMOS PLL  
fanout buffer with zero insertion delay will show significantly  
lower clock skew than clock distributions developed from  
CMOS fanout buffers. The external feedback option of the  
MPC961C clock driver allows for its use as a zero delay  
buffer. By using the QFB output as a feedback to the PLL the  
propagation delay through the device is virtually eliminated.  
The PLL aligns the feedback clock output edge with the clock  
input reference edge resulting a near zero delay through the  
device. The maximum insertion delay of the device in  
zero-delay applications is measured between the reference  
clock input and any output. This effective delay consists of  
the static phase offset, I/O jitter (phase or long-term jitter),  
feedback path delay and the output-to-output skew error  
relative to the feedback output.  
VL = 3.0 (25 / (18 + 14 + 25) = 3.0 (25 / 57)  
= 1.31V  
At the load end the voltage will double, due to the near  
unity reflection coefficient, to 2.62V. It will then increment  
towards the quiescent 3.0V in steps separated by one round  
trip delay (in this case 4.0ns).  
3.0  
OutA  
= 3.8956  
OutB  
= 3.9386  
t
D
2.5  
2.0  
1.5  
1.0  
0.5  
0
t
D
In  
Calculation of part-to-part skew  
The MPC961C zero delay buffer supports applications  
where critical clock signal timing can be maintained across  
several devices. If the reference clock inputs of two or more  
MPC961C are connected together, the maximum overall  
timing uncertainty from the common CCLK input to any  
output is:  
t
= t  
+ t  
+ t  
+ t  
CF  
This maximum timing uncertainty consist of 4  
SK(PP)  
( )  
SK(O)  
PD, LINE(FB)  
JIT( )  
2
4
6
8
10  
12  
14  
TIME (nS)  
components: static phase offset, output skew, feedback  
board trace delay and I/O (phase) jitter:  
Figure 5. Single versus Dual Waveforms  
Since this step is well above the threshold region it will not  
cause any false clock triggering, however designers may be  
uncomfortable with unwanted reflections on the line. To  
better match the impedances when driving multiple lines the  
situation in Figure 6. should be used. In this case the series  
terminating resistors are reduced such that when the parallel  
combination is added to the output buffer impedance the line  
impedance is perfectly matched.  
CCLK  
Common  
t
PD,LINE(FB)  
–t  
(
)
QFB  
Device 1  
t
JIT(  
)
Any Q  
Device 1  
+t  
SK(O)  
+t  
(
)
MPC961  
OUTPUT  
BUFFER  
Z
= 50Ω  
= 50Ω  
QFB  
O
R = 22Ω  
Device2  
S
t
JIT(  
)
14Ω  
Any Q  
Device 2  
+t  
SK(O)  
Z
O
R = 22Ω  
S
Max. skew  
t
SK(PP)  
Figure 7. MPC961C max. device-to-device skew  
14+ 2222= 5050Ω  
25= 25Ω  
Due to the statistical nature of I/O jitter a rms value (1 ) is  
specified. I/O jitter numbers for other confidence factors (CF)  
can be derived from Table 8.  
Figure 6. Optimized Dual Line Termination  
For More Information On This Product,  
MOTOROLA  
6
TIMING SOLUTIONS  
DL207 — Rev 0  
Go to: www.freescale.com  
Freescale Semiconductor, Inc.  
MPC961C  
convection and thermal conductivity of package and board.  
This section describes the impact of these parameters on the  
junction temperature and gives a guideline to estimate the  
MPC961C die junction temperature and the associated  
device reliability. For a complete analysis of power  
consumption as a function of operating conditions and  
associated long term device reliability please refer to the  
application note AN1545. According the AN1545, the  
long-term device reliability is a function of the die junction  
temperature:  
Table 8: Confidence Facter CF  
CF  
Probability of clock edge within the distribution  
± 1  
± 2  
± 3  
± 4  
± 5  
± 6  
0.68268948  
0.95449988  
0.99730007  
0.99993663  
0.99999943  
0.99999999  
The feedback trace delay is determined by the board  
layout and can be used to fine-tune the effective delay  
through each device. In the following example calculation a  
I/O jitter confidence factor of 99.7% (± 3 ) is assumed,  
resulting in a worst case timing uncertainty from input to any  
output of -275 ps to 315 ps relative to CCLK:  
Table 9: Die junction temperature and MTBF  
Junction temperature (°C)  
MTBF (Years)  
100  
110  
120  
130  
20.4  
9.1  
4.2  
2.0  
t
=
=
[–80ps...120ps] + [–150ps...150ps] +  
[(15ps –3)...(15ps 3)] + t  
SK(PP)  
PD, LINE(FB)  
[–275ps...315ps] + t  
PD, LINE(FB)  
Increased power consumption will increase the die  
junction temperature and impact the device reliability  
(MTBF). According to the system-defined tolerable MTBF,  
the die junction temperature of the MPC961C needs to be  
controlled and the thermal impedance of the board/package  
should be optimized. The power dissipated in the MPC961C  
is represented in equation 1.  
t
SK(PP)  
Due to the frequency dependence of the I/O jitter,  
Figure 8. “Max. I/O Jitter versus frequency” can be used for  
a more precise timing performance analysis.  
Where I  
is the static current consumption of the  
is the power dissipation capacitance per  
CCQ  
MPC961C, C  
PD  
output, (Μ)ΣC represents the external capacitive output  
L
load, N is the number of active outputs (N is always 27 in  
case of the MPC961C). The MPC961C supports driving  
transmission lines to maintain high signal integrity and tight  
timing parameters. Any transmission line will hide the lumped  
capacitive load at the end of the board trace, therefore, ΣC is  
L
zero for controlled transmission line systems and can be  
eliminated from equation 1. Using parallel termination output  
termination results in equation 2 for power dissipation.  
In equation 2, P stands for the number of outputs with a  
Figure 8. Max. I/O Jitter versus frequency  
parallelorthevenintermination, V , I , V  
and I  
are a  
OL OL OH  
OH  
function of the output termination technique and DC is the  
Power Consumption of the MPC961C and Thermal  
Management  
Q
clock signal duty cyle. If transmission lines are used ΣC is  
L
The MPC961C AC specification is guaranteed for the  
entire operating frequency range up to 200 MHz. The  
MPC961C power consumption and the associated long-term  
reliability may decrease the maximum frequency limit,  
depending on operating conditions such as clock frequency,  
supply voltage, output loading, ambient temperature, vertical  
zero in equation 2 and can be eliminated. In general, the use  
of controlled transmission line techniques eliminates the  
impact of the lumped capacitive loads at the end lines and  
greatly reduces the power dissipation of the device. Equation  
3 describes the die junction temperature T as a function of  
J
the power consumption.  
PTOT  
ICCQ VCC fCLOCK  
N
CPD  
CL  
VCC  
Equation 1  
Equation 2  
M
PTOT  
VCC  
ICCQ VCC fCLOCK  
N
CPD  
CL  
DCQ IOH VCC VOH  
1
DCQ IOL VOL  
M
P
Equation 3  
Equation 4  
TJ  
TA PTOT Rthja  
TJ,MAX TA  
Rthja  
1
N
fCLOCK,MAX  
ICCQ VCC  
CPD  
V2CC  
For More Information On This Product,  
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DL207 — Rev 0  
7
MOTOROLA  
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Freescale Semiconductor, Inc.  
MPC961C  
Where R  
is the thermal impedance of the package  
T
should be selected according to the MTBF system  
J,MAX  
thja  
(junction to ambient) and T is the ambient temperature.  
requirements and Table 9. R  
The R  
boards will result in a lower thermal impedance than  
indicated below.  
can be derived from Table10.  
A
thja  
represent data based on 1S2P boards, using 2S2P  
According to Table 9, the junction temperature can be used to  
estimate the long-term device reliability. Further, combining  
equation 1 and equation 2 results in a maximum operating  
frequency for the MPC961C in a series terminated  
transmission line system.  
thja  
If the calculated maximum frequency is below 200 MHz, it  
becomes the upper clock speed limit for the given application  
conditions. The following two derating charts describe the  
safe frequency operation range for the MPC961C. The charts  
were calculated for a maximum tolerable die junction  
temperature of 110°C, corresponding to an estimated MTBF  
of 9.1 years, a supply voltage of 3.3V and series terminated  
transmission line or capacitive loading. Depending on a given  
set of these operating conditions and the available device  
convection a decision on the maximum operating frequency  
can be made. There are no operating frequency limitations if  
a 2.5V power supply or the system specifications allow for a  
MTBF of 4 years (corresponding to a max. junction  
temperature of 120°C.  
Table 10: Thermal package impedance of the 32ld  
LQFP  
Convection, LFPM  
Still air  
R
(1P2S board), K/W  
thja  
80  
70  
61  
57  
56  
55  
100 lfpm  
200 lfpm  
300 lfpm  
400 lfpm  
500 lfpm  
200  
200  
f
(AC)  
f
(AC)  
MAX  
MAX  
180  
160  
140  
120  
100  
80  
180  
160  
140  
120  
100  
80  
T = 85°C  
A
T = 75°C  
A
T = 85°C  
A
60  
60  
Safe operation  
Safe operation  
40  
40  
20  
20  
0
0
500  
400  
300  
200  
100  
0
500  
400  
300  
200  
100  
0
I
, CONVECTION  
I
, CONVECTION  
FPM  
FPM  
Figure 9. Maximum MPC961C frequency, V  
= 3.3V, MTBF  
Figure 10. Maximum MPC961C frequency,  
V = 3.3V, MTBF 9.1 years, 4 pF load per line  
CC  
CC  
9.1 years, driving series terminated transmission lines  
MPC961C DUT  
Pulse  
Generator  
Z = 50  
Z
O
= 50Ω  
Z = 50Ω  
O
R = 50Ω  
T
R = 50Ω  
T
V
TT  
V
TT  
Figure 11. TCLK MPC961C AC test reference for V = 3.3V and V = 2.5V  
cc  
cc  
For More Information On This Product,  
MOTOROLA  
8
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MPC961C  
V
CC  
V
CC  
V
CC  
GND  
2
2
CCLK  
FB_IN  
V
CC  
2
2
GND  
V
OH  
V
CC  
V
CC  
V
CC  
GND  
GND  
t
SK(O)  
t
(
)
The pin–to–pin skew is defined as the worst case difference in prop-  
agation delay between any similar delay path within a single device  
Figure 12. Output–to–output Skew t  
SK(O)  
Figure 13. Propagation delay (t , static phase  
PD  
offset) test reference  
V
CC  
V
CC  
GND  
2
CCLK  
FB_IN  
t
P
T
0
DC = t /T x 100%  
P 0  
T
JIT  
= |T –T mean|  
0 1  
)
The time from the PLL controlled edge to the non controlled edge,  
divided by the time between PLL controlled edges, expressed as a  
percentage  
The deviation in t for a controlled edge with respect to a t mean in a  
random sample of cycles  
0
0
Figure 14. Output Duty Cycle (DC)  
Figure 15. I/O Jitter  
T
= |T –T  
N+1  
|
T
= |T –1/f |  
JIT(CC)  
N
JIT(PER) N 0  
T
N
T
N+1  
T
0
The variation in cycle time of a signal between adjacent cycles, over a  
random sample of adjacent cycle pairs  
The deviation in cycle time of a signal with respect to the ideal period over  
a random sample of cycles  
Figure 16. Cycle–to–cycle Jitter  
Figure 17. Period Jitter  
V =3.3V  
CC  
V =2.5V  
CC  
2.4  
0.55  
1.8V  
0.6V  
t
F
t
R
Figure 18. Output Transition Time Test  
Reference  
For More Information On This Product,  
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DL207 — Rev 0  
9
MOTOROLA  
Go to: www.freescale.com  
Freescale Semiconductor, Inc.  
MPC961C  
OUTLINE DIMENSIONS  
FA SUFFIX  
LQFP PACKAGE  
CASE 873A–02  
ISSUE A  
4X  
A
A1  
0.20 (0.008) AB TU  
Z
32  
25  
1
–U–  
V
–T–  
B
AE  
AE  
P
B1  
DETAIL Y  
–Z–  
V1  
17  
8
DETAIL Y  
9
4X  
0.20 (0.008) AC TU  
Z
9
NOTES:  
S1  
1. DIMENSIONING AND TOLERANCING PER ANSI  
Y14.5M, 1982.  
S
2. CONTROLLING DIMENSION: MILLIMETER.  
3. DATUM PLANE AB– IS LOCATED AT BOTTOM OF  
LEAD AND IS COINCIDENT WITH THE LEAD  
WHERE THE LEAD EXITS THE PLASTIC BODY AT  
THE BOTTOM OF THE PARTING LINE.  
4. DATUMS T–, –U–, AND Z– TO BE DETERMINED  
AT DATUM PLANE AB.  
DETAIL AD  
G
5. DIMENSIONS S AND V TO BE DETERMINED AT  
SEATING PLANE AC–.  
–AB–  
6. DIMENSIONS A AND B DO NOT INCLUDE MOLD  
PROTRUSION. ALLOWABLE PROTRUSION IS  
0.250 (0.010) PER SIDE. DIMENSIONS A AND B  
DO INCLUDE MOLD MISMATCH AND ARE  
DETERMINED AT DATUM PLANE AB.  
7. DIMENSION D DOES NOT INCLUDE DAMBAR  
PROTRUSION. DAMBAR PROTRUSION SHALL  
NOT CAUSE THE D DIMENSION TO EXCEED  
0.520 (0.020).  
SEATING  
PLANE  
–AC–  
0.10 (0.004) AC  
BASE  
METAL  
N
8. MINIMUM SOLDER PLATE THICKNESS SHALL BE  
0.0076 (0.0003).  
9. EXACT SHAPE OF EACH CORNER MAY VARY  
FROM DEPICTION.  
F
D
8X M  
MILLIMETERS  
DIM MIN MAX  
7.000 BSC  
INCHES  
MIN MAX  
0.276 BSC  
0.138 BSC  
0.276 BSC  
0.138 BSC  
R
J
A
A1  
B
3.500 BSC  
7.000 BSC  
3.500 BSC  
SECTION AE–AE  
E
C
B1  
C
1.400  
1.600 0.055  
0.063  
0.018  
0.057  
0.016  
D
E
F
0.300  
1.350  
0.300  
0.450 0.012  
1.450 0.053  
0.400 0.012  
W
G
H
J
K
M
N
P
0.800 BSC  
0.031 BSC  
Q
H
K
X
0.050  
0.090  
0.500  
0.150 0.002  
0.200 0.004  
0.700 0.020  
0.006  
0.008  
0.028  
12 REF  
12 REF  
0.006  
0.016 BSC  
DETAIL AD  
0.090  
0.160 0.004  
0.400 BSC  
Q
R
1
5
1
5
0.150  
0.250 0.006  
0.010  
S
9.000 BSC  
0.354 BSC  
S1  
V
V1  
W
X
4.500 BSC  
9.000 BSC  
4.500 BSC  
0.200 REF  
1.000 REF  
0.177 BSC  
0.354 BSC  
0.177 BSC  
0.008 REF  
0.039 REF  
For More Information On This Product,  
MOTOROLA  
10  
TIMING SOLUTIONS  
DL207 — Rev 0  
Go to: www.freescale.com  
Freescale Semiconductor, Inc.  
MPC961C  
NOTES  
For More Information On This Product,  
TIMING SOLUTIONS  
DL207 — Rev 0  
11  
MOTOROLA  
Go to: www.freescale.com  
Freescale Semiconductor, Inc.  
MPC961C  
Motorola reserves the right to make changes without further notice to any products herein. Motorola makes no warranty, representation or  
guarantee regarding the suitability of its products for any particular purpose, nor does Motorola assume any liability arising out of the  
applicationor use of any product or circuit, and specifically disclaims any and all liability, includingwithoutlimitationconsequentialorincidental  
damages. “Typical” parameters which may be provided in Motorola data sheets and/or specifications can and do vary in differentapplications  
and actual performance may vary over time. All operating parameters, including “Typicals” must be validated for each customer application  
by customer’s technical experts. Motorola does not convey any license under its patent rights nor the rights of others. Motorola products are  
not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other applications  
intended to support or sustain life, or for any other application in which the failure of the Motorola product could create a situation where  
personal injury or death may occur. Should Buyer purchase or use Motorola products for any such unintended or unauthorized application,  
BuyershallindemnifyandholdMotorolaanditsofficers, employees, subsidiaries, affiliates, anddistributorsharmlessagainstallclaims, costs,  
damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated  
with such unintended or unauthorized use, even if such claim alleges that Motorola was negligent regarding the design or manufacture of the  
part. Motorola and  
are registered trademarks of Motorola, Inc. Motorola, Inc. is an Equal Opportunity/Affirmative Action Employer.  
How to reach us:  
USA/EUROPE/Locations Not Listed: Motorola Literature Distribution;  
JAPAN: Motorola Japan Ltd.; SPS, Technical Information Center, 3–20–1,  
P.O. Box 5405, Denver, Colorado 80217. 1–303–675–2140 or 1–800–441–2447 Minami–Azabu. Minato–ku, Tokyo 106–8573 Japan. 81–3–3440–3569  
Technical Information Center: 1–800–521–6274  
ASIA/PACIFIC: Motorola Semiconductors H.K. Ltd.; Silicon Harbour Centre,  
2, Dai King Street, Tai Po Industrial Estate, Tai Po, N.T., Hong Kong.  
852–26668334  
HOME PAGE: http://www.motorola.com/semiconductors/  
For More Information On This Product,  
MPC961C/D  
Go to: www.freescale.com  
DL207 — Rev 0  

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