MOTOROLA MPC9658

MOTOROLA
Freescale Semiconductor, Inc.
SEMICONDUCTOR TECHNICAL DATA
3.3V 1:10 LVCMOS PLL Clock
Generator
Freescale Semiconductor, Inc...
The MPC9658 is a 3.3V compatible, 1:10 PLL based clock generator
and zero-delay buffer targeted for high performance low-skew clock
distribution in mid-range to high-performance telecom, networking and
computing applications. With output frequencies up to 250 MHz and
output skews less than 120 ps the device meets the needs of the most
demanding clock applications. The MPC9658 is specified for the
temperature range of 0°C to +70°C.
Features
• 1:10 PLL based low-voltage clock generator
•
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Order Number: MPC9658/D
Rev 3, 02/2003
MPC9658
LOW VOLTAGE
3.3V LVCMOS 1:10
PLL CLOCK GENERATOR
Supports zero-delay operation
3.3V power supply
Generates clock signals up to 250 MHz
Maximum output skew of 120 ps
Differential LVPECL reference clock input
External PLL feedback
Drives up to 20 clock lines
32 lead LQFP packaging
Pin and function compatible to the MPC958
Functional Description
The MPC9658 utilizes PLL technology to frequency lock its outputs
FA SUFFIX
onto an input reference clock. Normal operation of the MPC9658 requires
32 LEAD LQFP PACKAGE
CASE 873A
the connection of the QFB output to the feedback input to close the PLL
feedback path (external feedback). With the PLL locked, the output
frequency is equal to the reference frequency of the device and
VCO_SEL selects the operating frequency range of 50 to 125 MHz or 100
to 250 MHz. The two available post-PLL dividers selected by VCO_SEL
(divide-by-2 or divide-by-4) and the reference clock frequency determine
the VCO frequency. Both must be selected to match the VCO frequency
range. The internal VCO of the MPC9658 is running at either 2x or 4x of
the reference clock frequency.
The MPC9658 has a differential LVPECL reference input along with an external feedback input. The MPC9658 is ideal for use
as a zero delay, low skew fanout buffer. The device performance has been tuned and optimized for zero delay performance.
The PLL_EN and BYPASS controls select the PLL bypass configuration for test and diagnosis. In this configuration, the
selected input reference clock is bypassing the PLL and routed either to the output dividers or directly to the outputs. The PLL
bypass configurations are fully static and the minimum clock frequency specification and all other PLL characteristics do not
apply. The outputs can be disabled (high-impedance) and the device reset by asserting the MR/OE pin. Asserting MR/OE also
causes the PLL to loose lock due to missing feedback signal presence at FB_IN. Deasserting MR/OE will enable the outputs and
close the phase locked loop, enabling the PLL to recover to normal operation.
The MPC9658 is fully 3.3V compatible and requires no external loop filter components. The inputs (except PCLK) accept
LVCMOS except signals while the outputs provide LVCMOS compatible levels with the capability to drive terminated 50
transmission lines. For series terminated transmission lines, each of the MPC9658 outputs can drive one or two traces giving the
devices an effective fanout of 1:16. The device is packaged in a 7x7 mm2 32-lead LQFP package.
W
 Motorola, Inc. 2003
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MPC9658
Q0
VCC
Q1
2⋅25k
0
PCLK
PCLK
&
Ref
1
VCO
0
÷1
0
÷2
1
÷2
Q2
1
Q3
Q4
PLL
200–500 MHz
Q5
VCC
25k
Q6
FB_IN
FB
Q7
Q8
PLL_EN
VCO_SEL
Q9
QFB
BYPASS
MR/OE
25k
Q2
VCC
Q3
GND
Q4
VCC
Q5
GND
Figure 1. MPC9658 Logic Diagram
24
23
22
21
20
19
18
17
GND
25
16
Q6
Q1
26
15
VCC
VCC
27
14
Q7
Q0
28
13
GND
GND
29
12
Q8
QFB
30
11
VCC
VCC
31
10
Q9
VCO_SEL
32
9
1
2
3
4
5
6
7
8
FB_IN
BYPASS
PLL_EN
MR/OE
PCLK
PCLK
GND
MPC9658
VCC_PLL
Freescale Semiconductor, Inc...
VCC
3⋅25k
GND
Figure 2. MPC9658 32–Lead Package Pinout (Top View)
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TIMING SOLUTIONS
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MPC9658
Table 1. PIN CONFIGURATION
Freescale Semiconductor, Inc...
Pin
I/O
Type
Function
PCLK, PCLK
Input
LVPECL
PECL reference clock signal
FB_IN
Input
LVCMOS
PLL feedback signal input, connect to QFB
VCO_SEL
Input
LVCMOS
Operating frequency range select
BYPASS
Input
LVCMOS
PLL and output divider bypass select
PLL_EN
Input
LVCMOS
PLL enable/disable
MR/OE
Input
LVCMOS
Output enable/disable (high-impedance tristate) and device reset
Q0-9
Output
LVCMOS
Clock outputs
QFB
Output
LVCMOS
Clock output for PLL feedback, connect to FB_IN
GND
Supply
Ground
Negative power supply (GND)
VCC_PLL
Supply
VCC
PLL positive power supply (analog power supply). It is recommended to use an external RC filter
for the analog power supply pin VCC_PLL. Please see applications section for details.
VCC
Supply
VCC
Positive power supply for I/O and core. All VCC pins must be connected to the positive power
supply for correct operation
Table 2. FUNCTION TABLE
Control
Default
0
1
PLL_EN
1
Test mode with PLL bypassed. The reference clock (PCLK)
is substituted for the internal VCO output. MPC9658 is fully
static and no minimum frequency limit applies. All PLL
related AC characteristics are not applicable.
Selects the VCO outputa
BYPASS
1
Test mode with PLL and output dividers bypassed. The
reference clock (PCLK) is directly routed to the outputs.
MPC9658 is fully static and no minimum frequency limit
applies. All PLL related AC characteristics are not
applicable.
Selects the output dividers.
VCO_SEL
1
VCO ÷ 1 (High frequency range). fREF = fQ0-9 = 2 ⋅ fVCO
VCO ÷ 2 (Low frequency range). fREF = fQ0-9 = 4 ⋅ fVCO
MR/OE
0
Outputs enabled (active)
Outputs disabled (high-impedance state) and reset of
the device. During reset the PLL feedback loop is open.
The VCO is tied to its lowest frequency. The length of
the reset pulse should be greater than one reference
clock cycle (PCLK).
a.
PLL operation requires BYPASS=1 and PLL_EN=1.
Table 3. ABSOLUTE MAXIMUM RATINGSa
Symbol
Characteristics
Min
Max
Unit
VCC
Supply Voltage
-0.3
3.9
V
VIN
DC Input Voltage
-0.3
VCC+0.3
V
DC Output Voltage
-0.3
VOUT
IIN
IOUT
VCC+0.3
V
DC Input Current
±20
mA
DC Output Current
±50
mA
Condition
TS
Storage Temperature
-65
125
°C
a. Absolute maximum continuous ratings are those maximum 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 at absolute-maximum-rated conditions is not
implied.
TIMING SOLUTIONS
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MPC9658
Table 4. GENERAL SPECIFICATIONS
Symbol
Min
Typ
VCC
B2
Max
Unit
Output Termination Voltage
ESD Protection (Machine Model)
200
HBM
ESD Protection (Human Body Model)
2000
V
Latch–Up Immunity
200
mA
LU
Freescale Semiconductor, Inc...
Characteristics
VTT
MM
Condition
V
V
CPD
Power Dissipation Capacitance
10
pF
Per output
CIN
Input Capacitance
4.0
pF
Inputs
θJA
LQFP 32 Thermal resistance junction to ambient
JESD 51-3, single layer test board
JESD 51-6, 2S2P multilayer test board
θJC
LQFP 32 Thermal resistance junction to case
83.1
73.3
68.9
63.8
57.4
86.0
75.4
70.9
65.3
59.6
°C/W
°C/W
°C/W
°C/W
°C/W
Natural convection
100 ft/min
200 ft/min
400 ft/min
800 ft/min
59.0
54.4
52.5
50.4
47.8
60.6
55.7
53.8
51.5
48.8
°C/W
°C/W
°C/W
°C/W
°C/W
Natural convection
100 ft/min
200 ft/min
400 ft/min
800 ft/min
23.0
26.3
°C/W
MIL-SPEC 883E
Method 1012.1
Max
Unit
VCC + 0.3
0.8
V
LVCMOS
Table 5. DC CHARACTERISTICS (VCC = 3.3V ± 5%, TA = 0°C to 70°C)
Symbol
VPP
Peak-to-Peak Input Voltage
(PCLK)
250
Common Mode Range
(PCLK)
1.0
c
d
Typ
2.0
Input Low Voltage
VOH
VOL
Output High Voltage
Output Low Voltagec
ZOUT
IIN
Output Impedance
Input Currentd
ICC_PLL
ICCQ
b
Min
Input High Voltage
VCMRa
a
Characteristics
VIH
VIL
VCC-0.6
2.4
0.55
0.30
14 - 17
V
LVCMOS
mV
LVPECL
V
LVPECL
V
IOH=-24 mAb
IOL= 24 mA
IOL= 12 mA
V
V
W
±200
µA
mA
Maximum PLL Supply Current
12
20
Maximum Quiescent Supply Current
13
20
Condition
VIN=VCC or GND
VCC_PLL Pin
mA
All VCC Pins
VCMR (DC) is the crosspoint of the differential input signal. Functional operation is obtained when the crosspoint is within the VCMR range
and the input swing lies within the VPP (DC) specification.
The MPC9658 is capable of driving 50Ω transmission lines on the incident edge. Each output drives one 50Ω parallel terminated
transmission line to a termination voltage of VTT. Alternatively, the device drives up to two 50Ω series terminated transmission lines.
The MPC9658 output levels are compatible to the MPC958 output levels.
Inputs have pull-down resistors affecting the input current.
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MPC9658
Table 6. AC CHARACTERISTICS (VCC = 3.3V ± 5%, TA = 0°C to 70°C)a
Symbol
fref
fVCO
fMAX
VPP
VCMRf
Freescale Semiconductor, Inc...
tPW,MIN
t(∅)
g
h
i
j
k
Min
÷2 feedbackb
÷4 feedbackc
Input reference frequency in PLL bypass moded
VCO lock frequency rangee
÷2 feedbackc
÷4 feedbackd
Output Frequency
Max
Unit
Condition
100
50
Typ
250
125
MHz
MHz
PLL locked
PLL locked
0
250
MHz
200
500
MHz
100
50
250
125
MHz
MHz
PLL locked
PLL locked
Peak-to-peak input voltage (PCLK)
500
1000
mV
LVPECL
Common Mode Range (PCLK)
Input Reference Pulse Widthg
1.2
VCC-0.9
V
LVPECL
Propagation Delay (static phase offset)
tPD
tsk(O)
Propagation Delay (PLL and divider bypass)
Output-to-output Skewh
DC
Output Duty Cyclei
tr, tf
tPLZ, HZ
Output Rise/Fall Time
2.0
PCLK to FB_IN
fREF=100 MHz
any frequency
PCLK to Q0-9
ns
PLL locked
–70
–125
1.0
+80
+125
ps
ps
4.0
ns
120
ps
(T÷2)+400
ps
1.0
ns
Output Disable Time
7.0
ns
tPZL, LZ
tJIT(CC)
Output Enable Time
6.0
ns
Cycle-to-cycle jitter
80
ps
tJIT(PER)
tJIT(∅)
Period Jitter
80
ps
I/O Phase Jitter fVCO=500 MHz and ÷ 2 feedback, RMS (1σ)j
fVCO=500 MHz and ÷ 4 feedback, RMS (1σ)
PLL closed loop bandwidthk
÷ 2 feedbackc
÷ 4 feedbackd
5.5
6.5
ps
ps
BW
a
b
c
d
e
f
Characteristics
Input reference frequency
PLL mode, external feedback
(T÷2)–400
T÷2
0.1
6–20
2–8
0.55 to 2.4V
MHz
MHz
tLOCK
Maximum PLL Lock Time
10
ms
AC characteristics apply for parallel output termination of 50Ω to VTT.
÷2 PLL feedback (high frequency range) requires VCO_SEL=0, PLL_EN=1, BYPASS=1 and MR/OE=0.
÷4 PLL feedback (low frequency range) requires VCO_SEL=1, PLL_EN=1, BYPASS=1 and MR/OE=0.
In bypass mode, the MPC9658 divides the input reference clock.
The input frequency fref must match the VCO frequency range divided by the feedback divider ratio FB: fref = fVCO ÷ FB.
VCMR (AC) is the crosspoint of the differential input signal. Normal AC operation is obtained when the crosspoint is within the VCMR range
and the input swing lies within the VPP (AC) specification. Violation of VCMR or VPP impacts static phase offset t(∅).
Calculation of reference duty cycle limits: DCREF,MIN = tPW,MIN ⋅ fREF ⋅ 100% and DCREF,MAX = 100% – DCREF,MIN.
See application section for part-to-part skew calculation in PLL zero-delay mode.
Output duty cycle is DC = (0.5 ± 400 ps ⋅ fOUT) ⋅ 100%. E.g. the DC range at fOUT=100MHz is 46%<DC<54%. T = output period.
See application section for a jitter calculation for other confidence factors than 1 s and a characteristic for other VCO frequencies.
-3 dB point of PLL transfer characteristics.
TIMING SOLUTIONS
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MPC9658
APPLICATIONS INFORMATION
Programming the MPC9658
The MPC9658 supports output clock frequencies from 50
to 250 MHz. Two different feedback divider configurations
can be used to achieve the desired frequency operation
range. The feedback divider (VCO_SEL) should be used to
situate the VCO in the frequency lock range between 200 and
500 MHz for stable and optimal operation. Two operating
frequency ranges are supported: 50 to 125 MHz and 100 to
250 MHz. Table 7 illustrates the configurations supported by
the MPC9658. PLL zero-delay is supported if BYPASS=1,
PLL_EN=1 and the input frequency is within the specified
PLL reference frequency range.
Freescale Semiconductor, Inc...
Table 7. MPC9658 Configurations (QFB connected to FB_IN)
Frequency
BYPASS
PLL_EN
VCO_SEL
Operation
0
X
X
Test mode: PLL and divider bypass
1
0
0
Test mode: PLL bypass
1
0
1
Test mode: PLL bypass
n/a
1
0
PLL mode (high frequency range)
fQ0-9 = fREF ÷ 4
fQ0-9 = fREF
0-62.5 MHz
1
100 to 250 MHz
1
1
1
PLL mode (low frequency range)
fQ0-9 = fREF
50 to 125 MHz
fVCO = fREF ⋅ 2
fVCO = fREF ⋅ 4
Power Supply Filtering
The MPC9658 is a mixed analog/digital product. Its analog
circuitry is naturally susceptible to random noise, especially if
this noise is seen on the power supply pins. Random noise
on the VCCA_PLL power supply impacts the device
characteristics, for instance I/O jitter. The MPC9658 provides
separate power supplies for the output buffers (VCC) and the
phase-locked loop (VCCA_PLL) of the device. The purpose of
this design technique is to isolate the high switching noise
digital outputs from the relatively sensitive internal analog
phase-locked loop. 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 simple but
effective form of isolation is a power supply filter on the
VCC_PLL pin for the MPC9658. Figure 3. illustrates a typical
power supply filter scheme. The MPC9658 frequency and
phase stability is most susceptible to noise with spectral
content in the 100kHz to 20MHz 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 across the series filter resistor RF. From the data sheet
the ICC_PLL current (the current sourced through the
VCC_PLL pin) is typically 12 mA (20 mA maximum), assuming
that a minimum of 2.835V must be maintained on the
VCC_PLL pin.
MOTOROLA
Ratio
Output range (fQ0-9)
VCO
fQ0-9 = fREF
fQ0-9 = fREF ÷ 2
0-250 MHz
n/a
0-125 MHz
n/a
RF = 5–15Ω
CF = 22 µF
RF
VCC_PLL
VCC
CF
10 nF
MPC9658
VCC
33...100 nF
Figure 3. VCC_PLL Power Supply Filter
The minimum values for RF and the filter capacitor CF are
defined by the required filter characteristics: the RC filter
should provide an attenuation greater than 40 dB for noise
whose spectral content is above 100 kHz. In the example RC
filter shown in Figure 3. “VCC_PLL Power Supply Filter”, the
filter cut-off frequency is around 3-5 kHz and the noise
attenuation at 100 kHz is better than 42 dB.
As the noise frequency crosses the series resonant point
of an individual capacitor its 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. Although the MPC9658 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 adequate to eliminate power supply
noise related problems in most designs.
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TIMING SOLUTIONS
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MPC9658
Table 8. Confidence Facter CF
Nested clock trees are typical applications for the
MPC9658. Designs using the MPC9658 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
MPC9658 clock driver allows for its use as a zero delay
buffer. The PLL aligns the feedback clock output edge with
the clock input reference edge resulting a near zero delay
through the device (the propagation delay through the device
is virtually eliminated). 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.
Calculation of part-to-part skew
The MPC9658 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
MPC9658 are connected together, the maximum overall
timing uncertainty from the common PCLK input to any output
is:
tSK(PP) = t( ∅) + tSK(O) + tPD, LINE(FB) + tJIT( ∅)
tPD,LINE(FB)
–t(∅)
Probability of clock edge within the distribution
± 1s
0.68268948
± 2s
0.95449988
± 3s
0.99730007
± 4s
0.99993663
± 5s
0.99999943
± 6s
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% (± 3s) is assumed,
resulting in a worst case timing uncertainty from input to any
output of -214 ps to 224 ps relative to PCLK (fREF = 100 MHz,
FB=÷4, tjit(∅)=8 ps RMS at fVCO = 400 MHz):
tSK(PP) =
[–70ps...80ps] + [–120ps...120ps] +
[(8ps @ –3)...(8ps @ 3)] + tPD, LINE(FB)
tSK(PP) =
[–214ps...224ps] + tPD, LINE(FB)
Due to the frequency dependence of the I/O jitter, figure 5.
can be used for a more precise timing performance analysis.
I/O Phase Jitter versus Frequency
Parameter: PLL Feedback Divider FB
CF
This maximum timing uncertainty consist of 4
components: static phase offset, output skew, feedback
board trace delay and I/O (phase) jitter:
PCLKCommon
CF
20
tjit( ∅ ) [ps] RMS
Freescale Semiconductor, Inc...
Using the MPC9658 in zero–delay applications
15
FB=÷4
10
FB=÷2
5
0
200
250
300
350
400
VCO frequency [MHz]
450
500
Figure 5. Max. I/O Jitter versus frequency
QFBDevice 1
tJIT(∅)
Any QDevice 1
+tSK(O)
+t(∅)
QFBDevice2
Any QDevice 2
Max. skew
tJIT(∅)
+tSK(O)
tSK(PP)
Figure 4. MPC9658 max. device-to-device skew
Due to the statistical nature of I/O jitter a RMS value (1 s) is
specified. I/O jitter numbers for other confidence factors (CF)
can be derived from Table 8.
TIMING SOLUTIONS
Driving Transmission Lines
The MPC9658 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 20Ω the
drivers can drive either parallel or series terminated
transmission lines. For more information on transmission
lines the reader is referred to Motorola application note
AN1091. 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
50Ω resistance 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 MPC9658 clock driver. For the series terminated
case however there is no DC current draw, thus the outputs
can drive multiple series terminated lines. Figure 6. “Single
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MPC9658
versus Dual Transmission Lines” illustrates an output driving
a single series terminated line versus two series terminated
lines in parallel. When taken to its extreme the fanout of the
MPC9658 clock driver is effectively doubled due to its
capability to drive multiple lines.
towards the quiescent 3.0V in steps separated by one round
trip delay (in this case 4.0ns).
3.0
OutA
tD = 3.8956
MPC9658
OUTPUT
BUFFER
IN
RS = 36Ω
14Ω
OutA
Freescale Semiconductor, Inc...
MPC9658
OUTPUT
BUFFER
IN
ZO = 50Ω
VOLTAGE (V)
2.5
OutB
tD = 3.9386
2.0
In
1.5
1.0
RS = 36Ω
ZO = 50Ω
OutB0
0.5
14Ω
RS = 36Ω
0
ZO = 50Ω
OutB1
2
4
6
8
TIME (nS)
10
12
14
Figure 7. Single versus Dual Waveforms
Figure 6. Single versus Dual Transmission Lines
The waveform plots in Figure 7. “Single versus Dual Line
Termination Waveforms” show the simulation results of an
output driving a single line versus two lines. In both cases the
drive capability of the MPC9658 output buffer is more than
sufficient to drive 50Ω transmission 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 MPC9658. The output waveform in Figure 7. “Single
versus Dual Line Termination Waveforms” shows a step in
the waveform, this step is caused by the impedance
mismatch seen looking into the driver. The parallel
combination of the 36Ω series resistor plus the output
impedance does not match the parallel combination of the
line impedances. The voltage wave launched down the two
lines will equal:
= VS ( Z0 ÷ (RS+R0 +Z0))
= 50Ω || 50Ω
= 36Ω || 36Ω
= 14Ω
= 3.0 ( 25 ÷ (18+14+25)
= 1.31V
At the load end the voltage will double, due to the near
unity reflection coefficient, to 2.6V. It will then increment
VL
Z0
RS
R0
VL
Differential
Pulse Generator
Z = 50
ZO = 50 Ω
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 8. “Optimized Dual Line Termination”
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.
MPC9658
OUTPUT
BUFFER
RS = 22Ω
ZO = 50Ω
RS = 22Ω
ZO = 50Ω
14Ω
14Ω + 22Ω k 22Ω = 50Ω k 50Ω
25Ω = 25Ω
Figure 8. Optimized Dual Line Termination
MPC9658 DUT
ZO = 50 Ω
W
RT = 50 Ω
RT = 50 Ω
VTT
VTT
Figure 9. PCLK MPC9658 AC test reference
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TIMING SOLUTIONS
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MPC9658
VCC
VCC 2
B
GND
PCLK
VCC
VCC 2
PCLK
VCMR =
VCC–1.3V
FB_IN
VCC
VCC 2
B
GND
VPP = 0.8V
B
tSK(O)
GND
The pin–to–pin skew is defined as the worst case difference
in propagation delay between any similar delay path within a
single device
t(PD)
Freescale Semiconductor, Inc...
Figure 10. Output–to–output Skew tSK(O)
VCC
VCC 2
B
Figure 11. Propagation delay (t(PD), static phase
offset) test reference
PCLK
GND
tP
FB_IN
T0
DC = tP /T0 x 100%
The time from the PLL controlled edge to the non controlled
edge, divided by the time between PLL controlled edges,
expressed as a percentage
TJIT(∅) = |T0 –T1 mean|
The deviation in t0 for a controlled edge with respect to a t0 mean in a
random sample of cycles
Figure 13. I/O Jitter
Figure 12. Output Duty Cycle (DC)
TN
TN+1
TJIT(CC) = |TN –TN+1 |
The variation in cycle time of a signal between adjacent cycles, over a
random sample of adjacent cycle pairs
Figure 14. Cycle–to–cycle Jitter
TJIT(PER) = |TN –1/f0 |
T0
The deviation in cycle time of a signal with respect to the ideal period over
a random sample of cycles
Figure 15. Period Jitter
VCC=3.3V
2.4
0.55
tF
tR
Figure 16. Output Transition Time Test Reference
TIMING SOLUTIONS
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MOTOROLA
Freescale Semiconductor, Inc.
MPC9658
OUTLINE DIMENSIONS
FA SUFFIX
LQFP PACKAGE
CASE 873A-03
ISSUE B
4X
0.20 H A–B D
6
D1
e/2
D1/2
PIN 1 INDEX
32
3
A, B, D
25
1
Freescale Semiconductor, Inc...
E1/2 A
F
B
6 E1
E
4
F
DETAIL G
17
8
9
7
E/2
DETAIL G
NOTES:
1. DIMENSIONS ARE IN MILLIMETERS.
2. INTERPRET DIMENSIONS AND TOLERANCES PER
ASME Y14.5M, 1994.
3. DATUMS A, B, AND D TO BE DETERMINED AT
DATUM PLANE H.
4. DIMENSIONS D AND E TO BE DETERMINED AT
SEATING PLANE C.
5. DIMENSION b DOES NOT INCLUDE DAMBAR
PROTRUSION. ALLOWABLE DAMBAR PROTRUSION
SHALL NOT CAUSE THE LEAD WIDTH TO EXCEED
THE MAXIMUM b DIMENSION BY MORE THAN
0.08–mm. DAMBAR CANNOT BE LOCATED ON THE
LOWER RADIUS OR THE FOOT. MINIMUM SPACE
BETWEEN PROTRUSION AND ADJACENT LEAD OR
PROTRUSION: 0.07–mm.
6. DIMENSIONS D1 AND E1 DO NOT INCLUDE MOLD
PROTRUSION. ALLOWABLE PROTRUSION IS
0.25–mm PER SIDE. D1 AND E1 ARE MAXIMUM
PLASTIC BODY SIZE DIMENSIONS INCLUDING
MOLD MISMATCH.
7. EXACT SHAPE OF EACH CORNER IS OPTIONAL.
8. THESE DIMENSIONS APPLY TO THE FLAT
SECTION OF THE LEAD BETWEEN 0.1–mm AND
0.25–mm FROM THE LEAD TIP.
D
D/2
4
D
4X
0.20 C A–B D
H
28X
e
32X
0.1 C
SEATING
PLANE
C
DETAIL AD
BASE
METAL
PLATING
ÉÉÉ
ÉÉÉ
b1
c
8X
b
( q1_)
0.20
R R2
A2
0.25
GAUGE PLANE
A1
(S)
L
(L1)
DETAIL AD
MOTOROLA
q_
5
C A–B D
SECTION F–F
R R1
A
M
c1
8
DIM
A
A1
A2
b
b1
c
c1
D
D1
e
E
E1
L
L1
θ
θ1
R1
R2
S
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MILLIMETERS
MIN
MAX
1.40
1.60
0.05
0.15
1.35
1.45
0.30
0.45
0.30
0.40
0.09
0.20
0.09
0.16
9.00 BSC
7.00 BSC
0.80 BSC
9.00 BSC
7.00 BSC
0.50
0.70
1.00 REF
0_
7_
12 _REF
0.08
0.20
0.08
–––
0.20 REF
TIMING SOLUTIONS
Freescale Semiconductor, Inc.
MPC9658
Freescale Semiconductor, Inc...
NOTES
TIMING SOLUTIONS
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MOTOROLA
Freescale Semiconductor, Inc.
Freescale Semiconductor, Inc...
MPC9658
Information in this document is provided solely to enable system and software implementers to use Motorola products. There are no express or implied copyright
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E Motorola Inc. 2003
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MOTOROLA
◊ More Information
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MPC9658/D
TIMING
SOLUTIONS