MPC93R52 Motorola, MPC93R52 Datasheet - Page 6

• Manufacturer Part Number: MPC93R52
• Description: LOW VOLTAGE 3.3V LVCMOS 1:11 CLOCK GENERATOR
• Manufacturer: Motorola

MPC93R52
Programming the MPC93R52
16.67 to 240 MHz. Different feedback and output divider
configurations can be used to achieve the desired input to
output frequency relationship. The feedback frequency and
divider should be used to situate the VCO in the frequency
lock range between 200 and 480 MHz for stable and optimal
operation. The FSELA, FSELB, FSELC pins select the
a.
b.
c.
a.
b.
c.
MOTOROLA
Table 9: MPC93R52 Example Configuration (F_RANGE = 0)
Table 10: MPC93R52 Example Configurations (F_RANGE = 1)
PLL Feedback
PLL Feedback
The MPC93R52 supports output clock frequencies from
VCO
VCO
VCO
VCO
fref is the input clock reference frequency (CCLK)
QAx connected to FB_IN and FSELA=0
QAx connected to FB_IN and FSELA=1
fref is the input clock reference frequency (CCLK)
QAx connected to FB_IN and FSELA=0
QAx connected to FB_IN and FSELA=1
12 c
4 b
6 c
8 b
fref a [MHz]
fref a [MHz]
16.67-40
33.3-80
50-120
25-60
FSELA
FSELA
0
0
1
1
1
1
1
1
0
0
1
1
1
1
1
1
FSELB
FSELB
0
0
0
0
0
0
1
1
0
0
0
0
0
0
1
1
APPLICATIONS INFORMATION
FSELC
FSELC
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
fref
fref
fref
fref
fref
fref
fref
fref
fref
fref
fref
fref
fref 2 3 (33-80 MHz)
fref 2 3 (33-80 MHz)
fref 2 3 (16-40 MHz)
fref 2 3 (16-40 MHz)
QA[0:4]:fref ratio
QA[0:4]:fref ratio
6
desired output clock frequencies. Possible frequency ratios
of the reference clock input to the outputs are 1:1, 1:2, 1:3, 3:2
as well as 2:3, 3:1 and 2:1. Table 1 illustrates the various
output configurations and frequency ratios supported by the
MPC93R52. See also Table 9, Table 10 and Figure 3 to
Figure 6 for further reference. A 2 output divider cannot be
used for feedback.
(50-120 MHz)
(50-120 MHz)
(33-80 MHz)
(33-80 MHz)
(33-80 MHz)
(33-80 MHz)
(25-60 MHz)
(25-60 MHz)
(16-40 MHz)
(16-40 MHz)
(16-40 MHz)
(16-40 MHz)
fref
fref
fref
fref
fref 3 2 (50-120 MHz)
fref 3 2 (50-120 MHz)
fref 3 (100-240 MHz)
fref 3 (100-240 MHz)
fref
fref
fref
fref
fref 3 2 (25-60 MHz)
fref 3 2 (25-60 MHz)
fref 3 (50-120 MHz)
fref 3 (50-120 MHz)
QB[0:3]:fref ratio
QB[0:3]:fref ratio
(50-120 MHz)
(50-120 MHz)
(50-120 MHz)
(50-120 MHz)
(25-60 MHz)
(25-60 MHz)
(25-60 MHz)
(25-60 MHz)
fref 2 (100-240 MHz)
fref
fref 2 (100-240 MHz)
fref
fref 3 (100-240 MHz)
fref 3 2 (50-120 MHz)
fref 3 (100-240 MHz)
fref 3 2 (50-120 MHz)
fref
fref
fref 2 (50-120 MHz)
fref 2 (50-120 MHz)
fref 3 (50-120 MHz)
fref 3 2 (25-60 MHz)
fref 3 (50-120 MHz)
fref 3 2 (25-60 MHz)
TIMING SOLUTIONS
QC[0:1]:fref ratio
QC[0:1]:fref ratio
(50-120 MHz)
(50-120 MHz)
(25-60 MHz)
(25-60 MHz)