Low Voltage PLL Clock Driver
MPC93H51
DATASHEET
PRODUCT DISCONTINUATION NOTICE - LAST TIME BUY EXPIRES SEPTEMBER 7,2016
The MPC93H51 is a 3.3 V compatible, PLL based clock generator targeted for
high performance clock distribution systems. With output frequencies of up to
240 MHz and a maxi mum output skew of 150 ps the MPC93H51 is an ideal
solution for the most demanding clock tree designs. The device offers 9 low skew
clock outputs. Each is configurable to support the clocking needs of the various
high-performance microprocessors including the PowerQuicc II integrated
communication microprocessor. The devices employs a fully differential PLL
design to minimize cycle-to-cycle and long-term jitter.
Features
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9 Outputs LVCMOS PLL Clock Generator
25 – 240 MHz Output Frequency Range
Fully Integrated PLL
Compatible to Various Microprocessors Such as PowerQuicc II
Supports Networking, Telecommunications and Computer Applications
Configurable Outputs: Divide-by-2, 4 and 8 of VCO Frequency
LVPECL and LVCMOS Compatible Inputs
External Feedback Enables Zero-Delay Configurations
Output Enable/Disable and Static Test Mode (PLL Enable/Disable)
Low Skew Characteristics: Maximum 150 ps Output-to-Output
32-Lead LQFP Package
32-Lead Pb-free Package Available
Ambient Temperature Range 0°C to +70°C
Pin AND Function Compatible With the MPC951
For functional replacement use 8T49N285
MPC93H51
LOW VOLTAGE 3.3 V
PLL CLOCK GENERATOR
FA SUFFIX
32-LEAD LQFP PACKAGE
CASE 873A-03
AC SUFFIX
32-LEAD LQFP PACKAGE
Pb-FREE PACKAGE
CASE 873A-03
Functional Description
The MPC93H51 utilizes PLL technology to frequency and phase lock its outputs onto an input reference clock. Normal operation of the MPC93H51 requires a connection of one of the device outputs to the EXT_FB input to close the PLL feedback path.
The reference clock frequency and the output divider for the feedback path determine the VCO frequency. Both must be selected
to match the VCO frequency range. With available output dividers of divide-by-4 and divide-by-8, the internal VCO of the
MPC93H51 is running at either 4x or 8x of the reference clock frequency. The frequency of the QA, QB, QC and QD outputs is
either one half, one fourth or one eighth of the selected VCO frequency and can be configured for each output bank using the
FSELA, FSELB, FSELC and FSELD pins, respectively. The available output-to-input frequency ratios are 4:1, 2:1, 1:1, 1:2 and
1:4. The REF_SEL pin selects the differential LVPECL (PCLK and PCLK) or the LVCMOS compatible reference input (TCLK).
The MPC93H51 also provides a static test mode when the PLL enable pin (PLL_EN) is pulled to logic low state. In test mode,
the selected input reference clock is routed directly to the output dividers bypassing the PLL. The test mode is intended for system
diagnostics, test and debug purpose. This test mode is fully static, and the minimum clock frequency specification does not apply.
The outputs can be disabled by deasserting the OE pin (logic high state). In PLL mode, deasserting OE causes the PLL to loose
lock due to no feedback signal presence at EXT_FB. Asserting OE will enable the outputs and close the phase locked loop, also
enabling the PLL to recover to normal operation. The MPC93H51 is 3.3 V compatible and requires no external loop filter components. All inputs except PCLK and PCLK accept LVCMOS 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 MPC93H51 outputs
can drive one or two traces giving the devices an effective fanout of 1:18. The device is packaged in a 7x7 mm2 32-lead LQFP
package.
Application Information
The fully integrated PLL of the MPC93H51 allows the low skew outputs to lock onto a clock input and distribute it with essentially zero propagation delay to multiple components on the board. In zero-delay buffer mode, the PLL minimizes phase offset
between the outputs and the reference signal.
MPC93H51 REVISION 4 MARCH 14, 2016
1
©2016 Integrated Device Technology, Inc.
MPC93H51 Data Sheet
LOW VOLTAGE PLL CLOCK DRIVER
PCLK
(pullup)
TCLK
REF_SEL
EXT_FB
0
0
PCLK
(pulldown)
Ref
1
PLL
2
4
8
1
(pulldown)
(pulldown)
0
D
Q
QA
D
Q
QB
1
FB
0
200–480 MHz
1
PLL_EN
(pullup)
QC0
0
FSELA
FSELB
FSELC
FSELD
D
(pulldown)
Q
(pulldown)
(pulldown)
(pulldown)
QD0
QD1
0
D
Q
1
OE
QC1
1
QD2
QD3
QD4
(pulldown)
The MPC93H51 requires an external RC filter for the analog power supply pin VCCA. Please see Applications Information for details.
QC0
VCCO
QC1
GND
QD0
VCCO
QD1
GND
Figure 1. MPC93H51 Logic Diagram
24
23
22
21
20
19
18
17
GND
25
16
QD2
QB
26
15
VCCO
VCCO
27
14
QD3
QA
28
13
GND
GND
29
12
QD4
TCLK
30
11
VCCO
PLL_EN
31
10
OE
REF_SEL
32
9
1
2
3
4
5
6
7
8
VCCA
EXT_FB
FSELA
FSELB
FSELC
FSELD
GND
PCLK
MPC93H51
PCLK
Figure 2. Pinout: 32-Lead LQFP Package Pinout (Top View)
MPC93H51 REVISION 4 MARCH 14, 2016
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©2016 Integrated Device Technology, Inc.
MPC93H51 Data Sheet
LOW VOLTAGE PLL CLOCK DRIVER
Table 1. Pin Description
Pin
I/O
Type
Function
PCLK, PCLK
Input
LVPECL
Differential clock reference
Low voltage positive ECL input
TCLK
Input
LVCMOS
Single ended reference clock signal or test clock
EXT_FB
Input
LVCMOS
Feedback signal input, connect to a QA, QB, QC, QD output
REF_SEL
Input
LVCMOS
Selects input reference clock
FSELA
Input
LVCMOS
Output A divider selection
FSELB
Input
LVCMOS
Output B divider selection
FSELC
Input
LVCMOS
Outputs C divider selection
FSELD
Input
LVCMOS
Outputs D divider selection
OE
Input
LVCMOS
Output enable/disable
QA
Output
LVCMOS
Bank A clock output
QB
Output
LVCMOS
Bank B clock output
QC0, QC1
Output
LVCMOS
Bank C clock outputs
QD0 – QD4
Output
LVCMOS
Bank D clock outputs1.5
VCCA
Supply
VCC
Positive power supply for the PLL
VCC
Supply
VCC
Positive power supply for I/O and core
GND
Supply
Ground
Negative power supply
Table 2. Function Table
Control
Default
0
1
REF_SEL
0
Selects PCLK as reference clock
Selects TCLK as reference clock
PLL_EN
1
Test mode with PLL disabled. The input clock is
directly routed to the output dividers
PLL enabled. The VCO output is routed to the
output dividers
OE
0
Outputs enabled
Outputs disabled, PLL loop is open
VCO is forced to its minimum frequency
FSELA
0
QA = VCO 2
QA = VCO 4
FSELB
0
QB = VCO 4
QB = VCO 8
FSELC
0
QC = VCO 4
QC = VCO 8
FSELD
0
QD = VCO 4
QD = VCO 8
Table 3. Absolute Maximum Ratings(1)
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
VCC+0.3
V
DC Input Current
20
mA
DC Output Current
50
mA
150
C
VOUT
IIN
IOUT
TS
Storage Temperature
MPC93H51 REVISION 4 MARCH 14, 2016
–65
3
©2016 Integrated Device Technology, Inc.
MPC93H51 Data Sheet
LOW VOLTAGE PLL CLOCK DRIVER
1. 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.
Table 4. General Specifications
Symbol
Characteristics
Min
Typ
Max
VCC 2
Unit
Condition
VTT
Output Termination Voltage
MM
ESD (Machine Model)
200
V
HBM
ESD (Human Body Model)
2000
V
LU
Latch-Up
200
mA
CPD
Power Dissipation Capacitance
10
pF
Per output
CIN
Input Capacitance
4.0
pF
Inputs
V
Table 5. DC Characteristics (VCC = 3.3 V ± 5%, TA = 0° to 70°C)
Symbol
Characteristics
VIH
Input High Voltage
VIL
Input Low Voltage
VPP
VCMR
(1)
PCLK, PCLK
250
Common Mode Range
PCLK, PCLK
1.0
Output High Voltage
VOL
Output Low Voltage
ZOUT
Output Impedance
Typ
2.0
Peak-to-Peak Input Voltage
VOH
IIN
Min
Max
Unit
VCC + 0.3
V
LVCMOS
0.8
V
LVCMOS
mV
LVPECL
V
LVPECL
V
IOH = –24 mA(2)
V
V
IOL = 24 mA
IOL = 12 mA
VCC-0.6
2.4
0.55
0.30
7 – 10
Input Leakage Current
Condition
150
A
VIN = VCC or GND
ICCA
Maximum PLL Supply Current
6.0
12.0
mA
VCCA Pin
ICCQ
Maximum Quiescent Supply Current
10.0
14.0
mA
All VCC Pins
1. 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.
2. The MPC93H51 is capable of driving 50 transmission lines on the incident edge. Each output drives one 50 parallel terminated
transmission line to a termination voltage of VTT. Alternatively, the device drives up to two 50 series terminated transmission lines.
MPC93H51 REVISION 4 MARCH 14, 2016
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©2016 Integrated Device Technology, Inc.
MPC93H51 Data Sheet
LOW VOLTAGE PLL CLOCK DRIVER
Table 6. AC Characteristics (VCC = 3.3 V 5%, TA = 0° to 70°C)(1)
Symbol
Characteristics
Input Frequency(2)
fref
fVCO
Min
4 feedback
8 feedback
Static test mode
VCO Frequency
Frequency(2)
2 output
4 output
8 output
Typ
Max
Unit
Condition
50
25
0
120
60
300
MHz
MHz
MHz
PLL_EN = 1
PLL_EN = 1
PLL_EN = 0
200
480
MHz
100
50
25
240
120
60
MHz
MHz
MHz
25
75
%
fMAX
Maximum Output
frefDC
Reference Input Duty Cycle
VPP
Peak-to-Peak Input Voltage
PCLK, PCLK
500
1000
mV
LVPECL
Common Mode Range
PCLK, PCLK
1.2
VCC-0.9
V
LVPECL
1.0
ns
0.8 to 2.0 V
+150
+250
ps
ps
PLL locked
PLL locked
300
ps
55
52.5
51.75
%
%
%
1.0
ns
VCMR
(3)
tr, tf(4)
t()
tsk(o)
TCLK Input Rise/Fall Time
Propagation Delay (static phase offset)
TCLK to EXT_FB
PCLK to EXT_FB
–150
0
Output-to-Output Skew
DC
Output Duty Cycle
tr, tf
Output Rise/Fall Time
tPLZ, HZ
Output Disable Time
7.0
ns
tPZL, ZH
Output Enable Time
6.0
ns
BW
PLL closed loop bandwidth
100 – 240 MHz
50 – 120 MHz
25 – 60 MHz
45
47.5
48.75
50
50
50
0.1
2 feedback
4 feedback
8 feedback
9.0 – 20.0
3.0 – 9.5
1.2 – 2.1
MHz
MHz
0.55 to 2.4 V
-3 db point of
PLL transfer
characteristic
tJIT(CC)
Cycle-to-cycle jitter
4 feedback
Single Output Frequency Configuration
40
ps
RMS value
tJIT(PER)
Period Jitter
4 feedback
Single Output Frequency Configuration
25
ps
RMS value
tJIT()
I/O Phase Jitter
30
ps
RMS value
tLOCK
Maximum PLL Lock Time
5
ms
1. AC characteristics apply for parallel output termination of 50 to VTT.
2. The PLL will be unstable with a divide by 2 feedback ratio.
3. 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().
4. The MPC93H51 will operate with input rise/fall times up to 3.0 ns, but the AC characteristics, specifically t(), can only be guaranteed if
tr/tf are within the specified range.
MPC93H51 REVISION 4 MARCH 14, 2016
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©2016 Integrated Device Technology, Inc.
MPC93H51 Data Sheet
LOW VOLTAGE PLL CLOCK DRIVER
APPLICATIONS INFORMATION
Programming the MPC93H51
The MPC93H51 clock driver outputs can be configured
into several divider modes. In addition, the external feedback
of the device allows for flexibility in establishing various inputto-output frequency relationships. The output divider of the
four output groups allows the user to configure the outputs
into 1:1, 2:1, 4:1 and 4:2:1 frequency ratios. The use of even
dividers ensure that the output duty cycle is always 50%.
Table 7 illustrates the various output configurations. The
table describes the outputs using the input clock frequency
CLK as a reference.
The output division settings establish the output
relationship. In addition, it must be ensured that the VCO will
be stable given the frequency of the outputs desired. The
feedback frequency should be used to situate the VCO into a
frequency range in which the PLL will be stable. The design
of the PLL supports output frequencies from 25 MHz to
240 MHz while the VCO frequency range is specified from
200 MHz to 480 MHz and should not be exceeded for stable
operation.
Table 7. Output Frequency Relationship(1) for an Example Configuration
Inputs
Outputs
FSELA
FSELB
FSELC
FSELD
QA
QB
QC
QD
0
0
0
0
2 * CLK
CLK
CLK
CLK
0
0
0
1
2 * CLK
CLK
CLK
CLK 2
0
0
1
0
4 * CLK
2 * CLK
CLK
2* CLK
0
0
1
1
4 * CLK
2 * CLK
CLK
CLK
0
1
0
0
2 * CLK
CLK 2
CLK
CLK
0
1
0
1
2 * CLK
CLK 2
CLK
CLK 2
0
1
1
0
4 * CLK
CLK
CLK
2 * CLK
0
1
1
1
4 * CLK
CLK
CLK
CLK
1
0
0
0
CLK
CLK
CLK
CLK
1
0
0
1
CLK
CLK
CLK
CLK 2
1
0
1
0
2 * CLK
2 * CLK
CLK
2 * CLK
1
0
1
1
2 * CLK
2 * CLK
CLK
CLK
1
1
0
0
CLK
CLK 2
CLK
CLK
1
1
0
1
CLK
CLK 2
CLK
CLK 2
1
1
1
0
2 * CLK
CLK
CLK
2 * CLK
1
1
1
1
2 * CLK
CLK
CLK
CLK
1. Output frequency relationship with respect to input reference frequency CLK. QC1 is connected to EXT_FB.
Using the MPC93H51 in Zero-Delay Applications
Nested clock trees are typical applications for the
MPC93H51. For these applications the MPC93H51 offers a
differential LVPECL clock input pair as a PLL reference. This
allows for the use of differential LVPECL primary clock
distribution devices such as the Freescale Semiconductor
MC100EP111 or MC10EP222, taking advantage of its
superior low-skew performance. Clock trees using LVPECL
for clock distribution and the MPC93H51 as LVCMOS PLL
fanout buffer with zero insertion delay will show significantly
lower clock skew than clock distributions developed from
CMOS fanout buffers.
MPC93H51 REVISION 4 MARCH 14, 2016
The external feedback option of the MPC93H51 PLL
allows for its use as a zero delay buffer. The PLL aligns the
feedback clock output edge with the clock input reference
edge and virtually eliminates the propagation delay through
the device.
The remaining insertion delay (skew error) of the
MPC93H51 in zero-delay applications is measured between
the reference clock input and any output. This effective delay
consists of the static phase offset (SPO or t()), I/O jitter
(tJIT(), phase or long-term jitter), feedback path delay and
the output-to-output skew (tSK(O) relative to the feedback
output.
6
©2016 Integrated Device Technology, Inc.
MPC93H51 Data Sheet
fref = 100 MHz
LOW VOLTAGE PLL CLOCK DRIVER
TCLK
Table 8. Confidence Factor CF
QA
QB
2 x 100 MHz
QC0
QC1
2 x 100 MHz
1
REF_SEL
1
1
0
0
0
PLL_EN
FSELA
FSELB
FSELC
FSELD
QD0
QD1
QD2
QD3
Ext_FB
QD4
4 x 100 MHz
MPC93H51
Figure 3. MPC93H51 Zero-Delay Configuration
(Feedback of QD4)
Calculation of Part-to-Part Skew
The MPC93H51 zero delay buffer supports applications
where critical clock signal timing can be maintained across
several devices. If the reference clock inputs (TCLK or PCLK)
of two or more MPC93H51 are connected together, the
maximum overall timing uncertainty from the common TCLK
input to any output is:
2
0.95449988
3
0.99730007
4
0.99993663
5
0.99999943
6
0.99999999
Above equation uses the maximum I/O jitter number
shown in the AC characteristic table for VCC = 3.3 V (17 ps
RMS). I/O jitter is frequency dependant with a maximum at
the lowest VCO frequency (200 MHz for the MPC93H51).
Applications using a higher VCO frequency exhibit less I/O
jitter than the AC characteristic limit. The I/O jitter
characteristics in Figure 5. can be used to derive a smaller
I/O jitter number at the specific VCO frequency, resulting in
tighter timing limits in zero-delay mode and for part-to-part
skew tSK(PP).
tPD,LINE(FB)
Max. I/O Jitter versus Frequency
30
tJIT()
tJIT() [ps] rms
25
Any QDevice 1
+tSK(O)
+t()
20
15
10
5
QFBDevice2
Any QDevice 2
0.68268948
tSK(PP) = [–251ps...351ps] + tPD, LINE(FB)
This maximum timing uncertainty consists of 4
components: static phase offset, output skew, feedback
board trace delay and I/O (phase) jitter:
QFBDevice 1
1
tSK(PP) = [–50ps...150ps] + [–150ps...150ps] +
[(17ps @ –3)...(17ps @ 3)] + tPD, LINE(FB)
tSK(PP) = t() + tSK(O) + tPD, LINE(FB) + tJIT() CF
—t()
Probability of Clock Edge within the Distribution
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, an
I/O jitter confidence factor of 99.7% ( 3) is assumed,
resulting in a worst case timing uncertainty from input to any
output of –251 ps to 351 ps relative to TCLK (VCC = 3.3 V and
fVCO = 400 MHz):
100 MHz (Feedback)
TCLKCommon
CF
tJIT()
0
200
275
300
325
350
375
400
Figure 5. Maximum I/O Jitter (RSM)
versus Frequency for VCC = 3.3 V
tSK(PP)
Figure 4. MPC93H51 Maximum Device-to-Device Skew
Power Supply Filtering
The MPC93H51 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.
Noise on the VCCA (PLL) power supply impacts the device
characteristics, for instance I/O jitter. The MPC93H51
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.
MPC93H51 REVISION 4 MARCH 14, 2016
250
VCO frequency [MHz]
+tSK(O)
Max. skew
225
7
©2016 Integrated Device Technology, Inc.
MPC93H51 Data Sheet
LOW VOLTAGE PLL CLOCK DRIVER
provides separate power supplies for the output buffers (VCC)
and the phase-locked loop (VCCA) 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 VCCA
pin for the MPC93H51.
Figure 6 illustrates a typical power supply filter scheme.
The MPC93H51 frequency and phase stability is most
susceptible to noise with spectral content in the 100 kHz to 20
MHz 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 ICCA current (the current
sourced through the VCCA pin) is typically 6 mA (12 mA
maximum), assuming that a minimum of 3.0 V must be
maintained on the VCCA pin. The resistor RF shown
in Figure 6 must have a resistance of 5–15 to meet the
voltage drop criteria.
technique terminates the signal at the end of the line with a
50 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 MPC93H51 clock driver. For the series
terminated case, however, there is no DC current draw; thus,
the outputs can drive multiple series terminated lines.
Figure 7 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 MPC93H51 clock
driver is effectively doubled due to its capability to drive
multiple lines.
MPC93H51
Output
Buffer
IN
MPC93H51
Output
Buffer
RF
VCCA
VCC
22 F
10
0.01 F
IN
MPC93H51
RS = 36
ZO = 50
RS = 36
ZO = 50
RS = 36
ZO = 50
OutA
OutB0
10
OutB1
VCC
0.01 F
Figure 6. VCCA Power Supply Filter
Figure 7. Single versus Dual Transmission Lines
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 MPC93H51 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.
The waveform plots in Figure 8 show the simulation results
of an output driving a single line versus two lines. In both
cases, the drive capability of the MPC93H51 output buffer is
more than sufficient to drive 50 transmission lines on the
incident edge. Note from the delay measurements in the
simulations, a delta of only 43 ps 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 MPC93H51. The output
waveform in Figure 8 shows a step in the waveform. This
step is caused by the impedance mismatch seen looking into
the driver. The parallel combination of the 36 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:
Driving Transmission Lines
The MPC93H51 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 20 the
drivers can drive either parallel or series terminated
transmission lines. For more information on transmission
lines the reader is referred to Freescale 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
MPC93H51 REVISION 4 MARCH 14, 2016
VL = VS (Z0 (RS + R0 + Z0))
Z0 = 50 || 50
RS = 36 || 36
R0 = 14
VL = 3.0 (25 (18 + 17 + 25)
= 1.31 V
At the load end, the voltage will double to 2.6 V due to the
near unity reflection coefficient. It will then increment towards
the quiescent 3.0 V in steps separated by one round trip delay
(in this case 4.0 ns).
8
©2016 Integrated Device Technology, Inc.
MPC93H51 Data Sheet
LOW VOLTAGE PLL CLOCK DRIVER
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 9 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.
MPC93H51
Output
Buffer
RS = 22
ZO = 50
RS = 22
ZO = 50
10
3.0
VOLTAGE (V)
2.5
OutA
tD = 3.8956
14 + 22 || 22 = 50 || 50
25 = 25
OutB
tD = 3.9386
Figure 9. Optimized Dual Line Termination
2.0
In
1.5
1.0
0.5
0
2
4
6
8
TIME (nS)
10
12
14
Figure 8. Single versus Dual Waveforms
MPC93H51 DUT
Pulse
Generator
Z = 50
ZO = 50
ZO = 50
RT = 50
RT = 50
VTT
VTT
Figure 10. TCLK MPC93H51 AC Test Reference for VCC = 3.3 V
Differential Pulse
Generator
Z = 50
MPC93H51 DUT
ZO = 50
ZO = 50
RT = 50
RT = 50
VTT
VTT
Figure 11. PCLK MPC93H51 AC Test Reference
MPC93H51 REVISION 4 MARCH 14, 2016
9
©2016 Integrated Device Technology, Inc.
MPC93H51 Data Sheet
LOW VOLTAGE PLL CLOCK DRIVER
PCLK
VCC
VCMR
PCLK
VCC2
TCLK
VCMR
GND
VCC
VCC2
Ext_FB
VCC
VCC2
Ext_FB
GND
GND
t()
t()
Figure 12. Propagation Delay (tPD, status phase offset)
Test Reference
Figure 13. Propagation Delay (tPD) Test Reference
VCC
VCC2
VCC
VCC2
GND
GND
tP
VCC
VCC2
T0
GND
DC = tP/T0 x 100%
tSK(O)
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 pin-to-pin skew is defined as the worst case difference in propagation delay
between any similar delay path within a single device
Figure 14. Output Duty Cycle (DC)
Figure 15. Output-to-Output Skew tSK(O)
TN
TN+1
TJIT(CC) = |TN-TN+1|
T0
The variation in cycle time of a signal between adjacent cycles, over a random
sample of adjacent cycle pairs
TJIT(P) = |TN-1/f0|
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
TCLK
(PCLK)
VCC = 3.3 V
2.4
Ext_FB
0.55
TJIT() = |T0-T1mean|
tF
tR
The deviation in t0 for a controlled edge with respect to a t0 mean
in a random sample of cycles
Figure 18. I/O Jitter
MPC93H51 REVISION 4 MARCH 14, 2016
Figure 19. Transition Time Test Reference
10
©2016 Integrated Device Technology, Inc.
MPC93H51 Data Sheet
LOW VOLTAGE PLL CLOCK DRIVER
PACKAGE DIMENSIONS
4X
0.20 H
6
A-B D
D1
3
e/2
D1/2
PIN 1 INDEX
32
A, B, D
25
1
E1/2 A
F
B
6 E1
E
4
F
DETAIL G
8
17
9
7
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.
4
D
4X
A-B D
H
SEATING
PLANE
DETAIL G
D
D/2
0.20 C
E/2
28X
e
32X
C
0.1 C
DETAIL AD
BASE
METAL
PLATING
b1
c
c1
b
8X
(θ1˚)
0.20
R R2
A2
5
8
C A-B D
SECTION F-F
R R1
A
M
0.25
GAUGE PLANE
A1
(S)
L
(L1)
θ˚
DETAIL AD
DIM
A
A1
A2
b
b1
c
c1
D
D1
e
E
E1
L
L1
q
q1
R1
R2
S
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
CASE 873A-03
ISSUE B
32-LEAD LQFP PACKAGE
MPC93H51 REVISION 4 MARCH 14, 2016
11
©2016 Integrated Device Technology, Inc.
MPC93H51 Data Sheet
LOW VOLTAGE PLL CLOCK DRIVER
Revision History Sheet
Rev
Table
Page
Description of Change
Date
5
1
NRND – Not Recommend for New Designs
4
1
Product Discontinuation Notice - Last time buy expires September 7, 2016
MPC93H51 REVISION 4 MARCH 14, 2016
12
2/15/2013
3/14/16
©2016 Integrated Device Technology, Inc.
MPC93H51 Data Sheet
LOW VOLTAGE PLL CLOCK DRIVER
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