MPC9608 Motorola Inc, MPC9608 Datasheet

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MPC9608

Manufacturer Part Number
MPC9608
Description
1:10 LVCMOS Zero Delay Clock Buffer
Manufacturer
Motorola Inc
Datasheet

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Part Number:
MPC9608AC
Manufacturer:
IDT, Integrated Device Technology Inc
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Part Number:
MPC9608ACR2
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Part Number:
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© Motorola, Inc. 2004
1:10 LVCMOS Zero Delay
Clock Buffer
very wide frequency range and low output skews the MPC9608 is targeted for
high performance and mid-range clock tree designs.
Features
• 1:10 outputs LVCMOS zero-delay buffer
• Single 3.3 V supply
• Supports a clock I/O frequency range of 12.5 to 200 MHz
• Selectable divide-by-two for one output bank
• Synchronous output enable control (CLK_STOP)
• Output tristate control (output high impedance)
• PLL bypass mode for low frequency system test purpose
• Supports networking, telecommunications and computer applications
• Supports a variety of microprocessors and controllers
• Compatible to PowerQuicc I and II
• Ambient Temperature Range -40 C to +85 C
• 32-lead Pb-free package available
Functional Description
low-skew clock output phase to the reference clock phase, providing virtually zero
propagation delay. This enables nested clock designs with near-zero insertion
delay. Designs using the MPC9608 as PLL fanout buffer will show significantly lower clock skew than clock distributions developed
from traditional fanout buffers. The device offers one reference clock input and two banks of 5 outputs for clock fanout. The input
frequency and phase is reproduced by the PLL and provided at the outputs. A selectable frequency divider sets the bank B outputs
to generate either an identical copy of the bank A clocks or one half of the bank A clock frequency. Both output banks remain syn-
chronized to the input reference for both bank B configurations.
the MPC9608 outputs can also be set to high-impedance state by connecting
a PLL bypass mode for low frequency test purpose. In PLL bypass mode, the minimum frequency and static phase offset specification
do not apply.
losing lock.
nals while the outputs provide LVCMOS compatible levels with the capability to drive terminated 50
dent edge. For series terminated transmission lines, each of the MPC9608 outputs can drive one or two traces giving the devices an
effective fanout of 1:20. The device is packaged in a 7x7 mm
REV 2
MOTOROLA
SEMICONDUCTOR TECHNICAL DATA
The MPC9608 is a 3.3 V compatible, 1:10 PLL based zero-delay buffer. With a
The MPC9608 uses an internal PLL and an external feedback path to lock its
Outputs are only disabled or enabled when the outputs are already in logic low state (CLK_STOP). For system test and diagnosis,
CLK_STOP and
The MPC9608 is fully 3.3 V compatible and requires no external components for the internal PLL. All inputs accept LVCMOS sig-
OE
do not affect the PLL feedback output (QFB) and down stream clocks can be disabled without the internal PLL
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
2
32-lead LQFP package.
OE
to logic high level. Additionally, the device provides
LVCMOS 1:10 ZERO-DELAY
32 LEAD LQFP PACKAGE-Pb-free
LOW VOLTAGE 3.3 V
32-LEAD LQFP PACKAGE
CLOCK BUFFER
MPC9608
CASE 873A
FA SUFFIX
transmission lines on the inci-
AC SUFFIX
CASE 873A
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MPC9608 Summary of contents

Page 1

... The MPC9608 is fully 3.3 V compatible and requires no external components for the internal PLL. All inputs accept LVCMOS sig- nals while the outputs provide LVCMOS compatible levels with the capability to drive terminated 50 dent edge. For series terminated transmission lines, each of the MPC9608 outputs can drive one or two traces giving the devices an effective fanout of 1:20. The device is packaged in a 7x7 mm REV 2 © ...

Page 2

... Figure 1. MPC9608 Logic Diagram MPC9608 Figure 2. MPC9608 32-Lead Package Pinout (Top View) For More Information On This Product, Go to: www.freescale.com Bank A Bank B 2 PLL feedback 17 16 VCC 15 QB4 14 QB3 13 QB2 12 GND 11 QB1 10 QB0 9 VCC ...

Page 3

... LVCMOS PLL feedback signal output. Connect to FB_IN Ground Negative power supply VCC PLL positive power supply (analog power supply). The MPC9608 requires an external RC filter for the analog power supply pin V VCC Positive power supply for I/O and core 0 PLL frequency range. Refer to Table 3 “Clock frequency configuration for QFB connected to FB_IN” ...

Page 4

... Output Impedance OUT I b Input Current IN I Maximum PLL Supply Current CCA I Maximum Quiescent Supply Current CCQ a. The MPC9608 is capable of driving 50 line to a termination voltage Inputs have pull-down resistors affecting the input current. 4 Freescale Semiconductor, Inc. Min 200 2000 200 a Min -0.3 -0 ...

Page 5

... PLL mode requires PLL_EN = 0 to enable the PLL and zero-delay operation bypass mode, the MPC9608 divides the input reference clock. d. Applies for bank A and for bank B if BSEL = 0. If BSEL = 1, the minimum and maximum output frequency of bank B is divided by two. ...

Page 6

... CMOS fanout buffers. The external feedback option of the MPC9608 clock driver allows for its use as a zero delay buffer. By using the QFB output as a feedback to the PLL the pin for the MPC9608. Figure 3 propagation delay through the device is virtually eliminated ...

Page 7

... Figure 5 “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 MPC9608 clock driver is effectively doubled due to its capability to drive multiple lines. ...

Page 8

... Pulse Generator Freescale Semiconductor, Inc. OutB = 3.9386 MPC9608 DUT Figure 8. CCLK MPC9608 AC test reference for V For More Information On This Product, Go to: www.freescale.com MPC9608 OUTPUT BUFFER ...

Page 9

... CCLK FB_IN JIT( ) for a controlled edge with respect Figure 12. I/O Jitter T JIT(PER Figure 14. Period Jitter CCLK CLK_STOP Figure 16. Setup and Hold Time ( MPC9608 GND GND - T mean mean 1 ...

Page 10

... MPC9608 PIN 1 INDEX E1 www.DataSheet4U.com 0. 28X SEATING PLANE (S) A1 DETAIL AD 10 Freescale Semiconductor, Inc. OUTLINE DIMENSIONS 4X 0. DETAIL 32X 0.1 C DETAIL AD BASE PLATING METAL 1˚) 0. SECTION F ...

Page 11

... Freescale Semiconductor, Inc. NOTES NOTES For More Information On This Product, Go to: www.freescale.com MPC9608 TIMING SOLUTIONS ...

Page 12

... JAPAN: Motorola Japan Ltd.; SPS, Technical Information Center 3-20-1 Minami-Azabu. Minato-ku, Tokyo 106-8573, Japan ASIA/PACIFIC: Motorola Semiconductors H.K. Ltd.; Silicon Harbour Centre 2 Dai King Street, Tai Po Industrial Estate, Tai Po, N.T., Hong Kong For More Information On This Product, Go to: www.freescale.com 81-3-3440-3569 852-26668334 HOME PAGE: http://motorola.com/semiconductors MPC9608 ...

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