mpc97h73 Integrated Device Technology, mpc97h73 Datasheet

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mpc97h73

Manufacturer Part Number
mpc97h73
Description
3.3v 1 12 Lvcmos Pll Clock Generator
Manufacturer
Integrated Device Technology
Datasheet

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mpc97h73AE
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IDT™ 3.3V 1:12 LVCMOS PLL Clock Generator
Freescale Timing Solutions Organization has been acquired by Integrated Device Technology, Inc
3.3V 1:12 LVCMOS PLL Clock
Generator
SEMICONDUCTOR TECHNICAL DATA
3.3V 1:12 LVCMOS PLL Clock
Generator
targeted for high performance low-skew clock distribution in mid-range to
high-performance networking, computing and telecom applications. With
output frequencies up to 240 MHz and output skews less than 250 ps the
device meets the needs of the most demanding clock applications.
Features
Functional Description
MPC97H73 requires the connection of the PLL feedback output QFB to feedback input FB_IN to close the PLL feedback path.
The reference clock frequency and the divider for the feedback path determine the VCO frequency. Both must be selected to
match the VCO frequency range. The MPC97H73 features an extensive level of frequency programmability between the 12
outputs as well as the output to input relationships, for instance 1:1, 2:1, 3:1, 3:2, 4:1, 4:3, 5:1, 5:2, 5:3, 5:4, 5:6, 6:1, 8:1 and 8:3.
feedback frequency is independent of the output frequencies. This allows for very flexible programming of the input reference
versus output frequency relationship. The output frequencies can be either odd or even multiples of the input reference. In
addition the output frequency can be less than the input frequency for applications where a frequency needs to be reduced by a
non–binary factor. The MPC97H73 also supports the 180° phase shift of one of its output banks with respect to the other output
banks. The QSYNC outputs reflects the phase relationship between the QA and QC outputs and can be used for the generation
of system baseline timing signals.
LVCMOS compatible clock inputs are provided for clock redundancy support. The PLL_EN control selects the PLL bypass
configuration for test and diagnosis. In this configuration, the selected input reference clock is routed directly to the output dividers
bypassing the PLL. The PLL bypass is fully static and the minimum clock frequency specification and all other PLL characteristics
do not apply.
MPC97H73. The MPC97H73 has an internal power–on reset.
LVCMOS signals while the outputs provide LVCMOS compatible levels with the capability to drive terminated 50 W transmission
lines. For series terminated transmission lines, each of the MPC97H73 outputs can drive one or two traces giving the devices an
effective fanout of 1:24. The device is pin and function compatible to the MPC973 and is packaged in a 52-lead LQFP package.
1:12 PLL based low-voltage clock generator
3.3V power supply
Internal power–on reset
Generates clock signals up to 240 MHz
Maximum output skew of 250 ps
Differential PECL reference clock input
Two LVCMOS PLL reference clock inputs
External PLL feedback supports zero-delay capability
Various feedback and output dividers (see application section)
Supports up to three individual generated output clock frequencies
Synchronous output clock stop circuitry for each individual output for
power down support
Drives up to 24 clock lines
Ambient temperature range 0°C to +70°C
Pin and function compatible to the MPC973
The MPC97H73 is a 3.3V compatible, 1:12 PLL based clock generator
The MPC97H73 utilizes PLL technology to frequency lock its outputs onto an input reference clock. Normal operation of the
The QSYNC output will indicate when the coincident rising edges of the above relationships will occur. The selectability of the
The REF_SEL pin selects the LVPECL or the LVCMOS compatible inputs as the reference clock signal. Two alternative
The outputs can be individually disabled (stopped in logic low state) by programming the serial CLOCK_STOP interface of the
The MPC97H73 is fully 3.3V compatible and requires no external loop filter components. All inputs (except PCLK) accept
Motorola, Inc. 2003
Freescale Semiconductor, Inc.
For More Information On This Product,
1
Go to: www.freescale.com
1
PLL CLOCK GENERATOR
MPC97H73
3.3V 1:12 LVCMOS
52 LEAD LQFP PACKAGE
CASE 848D
FA SUFFIX
Order Number: MPC97H73/D
DATA SHEET
Rev 0, 10/2003
MPC97H73
MPC97H73

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mpc97h73 Summary of contents

Page 1

... The MPC97H73 also supports the 180° phase shift of one of its output banks with respect to the other output banks. The QSYNC outputs reflects the phase relationship between the QA and QC outputs and can be used for the generation of system baseline timing signals ...

Page 2

... MPC97H73 3.3V 1:12 LVCMOS PLL Clock Generator MPC97H73 Figure 2. MPC97H73 52–Lead Package Pinout (Top View) IDT™ 3.3V 1:12 LVCMOS PLL Clock Generator MOTOROLA Freescale Timing Solutions Organization has been acquired by Integrated Device Technology, Inc Freescale Semiconductor, Inc. Ω 0 ÷ ÷ ÷ ÷ ...

Page 3

... Selects VCO÷2. The VCO frequency is scaled by a factor of 2 (low VCO frequency range). PLL_EN 1 Test mode with the PLL bypassed. The reference clock is substituted for the internal VCO output. MPC97H73 is fully static and no minimum frequency limit applies. All PLL related AC characteristics are not applicable. INV_CLK 1 ...

Page 4

... VCO÷8 FSEL_FB0 QFB 0 VCO÷8 1 VCO÷12 0 VCO÷16 1 VCO÷20 0 VCO÷16 1 VCO÷24 0 VCO÷32 1 VCO÷40 0 VCO÷4 1 VCO÷6 0 VCO÷8 1 VCO÷10 0 VCO÷8 1 VCO÷12 0 VCO÷16 1 VCO÷20 TIMING SOLUTIONS NETCOM MPC97H73 ...

Page 5

... CMR and the input swing lies within the V b. The MPC97H73 is capable of driving 50Ω transmission lines on the incident edge. Each output drives one 50Ω parallel terminated transmission line to a termination voltage Inputs have pull–down resistors affecting the input current. ...

Page 6

... MHz 1000 mV LVPECL V -0.9 V LVPECL CC ns 1.0 ns 0.8 to 2.0V PLL locked ° +3 ° +4 +166 ps 100 ps 100 ps 100 ps 250 ps T÷2 (T÷2) +200 ps 1.0 ns 0.55 to 2.4V 8.0 ns 8.0 ns 150 200 ps 150 (VCO=400 MHz TIMING SOLUTIONS NETCOM MPC97H73 ...

Page 7

... Normal AC operation is obtained when the crosspoint is within the V CMR and the input swing lies within the V d Calculation of reference duty cycle limits The MPC97H73 will operate with input rise/fall times up to 3.0 ns, but the A.C. characteristics, specifically t only be guaranteed are within the specified range CCLKx or PCLK to FB_IN ...

Page 8

... MPC97H73 3.3V 1:12 LVCMOS PLL Clock Generator MPC97H73 MPC97H73 Configurations Configuring the MPC97H73 amounts to properly configuring the internal dividers to produce the desired output frequencies. The output frequency can be represented by this formula: ⋅ ÷ ÷ where f is the reference frequency of the selected input REF clock source (CCLKO, CCLK1 or PCLK the PLL feedback divider and output divider ...

Page 9

... NRZ disable/enable bits. The period of each STOP_DATA bit equals the period of the free–running STOP_CLK signal. The STOP_DATA serial transmission should be timed so the MPC97H73 can sample each STOP_DATA bit with the rising edge of the free–running STOP_CLK signal. (see Figure 5. ) Figure 5 ...

Page 10

... QSYNC. In configurations with the output frequency relationships are not integer multiples of each other QSYNC provides a signal for system synchronization purposes. The MPC97H73 monitors the relationship between the A bank and the B bank of outputs. The QSYNC output is asserted (logic low) one period in duration and one period prior to the ÷ ...

Page 11

... CMOS fanout buffers. The external feedback option of the ) CC MPC97H73 clock driver allows for its use as a zero delay ) of the device. The 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) ...

Page 12

... V 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 MPC97H73 clock driver. For the series terminated case however there current draw, thus 12 For More Information On This Product, Go to: www ...

Page 13

... Figure 12. “Single 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 MPC97H73 clock driver is effectively doubled due to its capability to drive multiple lines. Ω Ω Ω ...

Page 14

... IDT™ 3.3V 1:12 LVCMOS PLL Clock Generator MOTOROLA Freescale Timing Solutions Organization has been acquired by Integrated Device Technology, Inc Freescale Semiconductor, Inc. Ω Ω Figure 15. CCLK MPC97H73 AC test reference Ω Ω Figure 16. PCLK MPC97H73 AC test reference 14 For More Information On This Product, Go to: www.freescale.com 14 NETCOM Ω Ω Ω ...

Page 15

... Figure 18. Propagation delay (t SK( 100 JIT(CC) N N+1 15 For More Information On This Product, Go to: www.freescale.com 15 NETCOM MPC97H73 B B ∅ , static phase (∅) offset) test reference mean JIT(∅ Figure 20. I/O Jitter JIT(PER Figure 22. Period Jitter MPC97H73 MOTOROLA ...

Page 16

... For More Information On This Product, Go to: www.freescale.com 16 NETCOM –X– X= VIEW Y MILLIMETERS INCHES DIM MIN MAX MIN MAX θ θ θ θ3 MPC97H73 TIMING SOLUTIONS ...

Page 17

... MPC92459 MPC97H73 PART NUMBERS 900 MHz Low Voltage LVDS Clock Synthesizer 3.3V 1:12 LVCMOS PLL Clock Generator INSERT PRODUCT NAME AND DOCUMENT TITLE Innovate with IDT and accelerate your future networks. Contact: www.IDT.com For Sales 800-345-7015 408-284-8200 Fax: 408-284-2775 Corporate Headquarters Integrated Device Technology, Inc. ...

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