MPC953FA Motorola, MPC953FA Datasheet

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MPC953FA

Manufacturer Part Number
MPC953FA
Description
Low voltage PLL clock driver
Manufacturer
Motorola
Datasheet

Specifications of MPC953FA

Case
QFP

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Low Voltage PLL Clock Driver
targeted for high performance clock tree designs. With output frequencies
of up to 87.5MHz and output skews of 150ps the MPC953 is ideal for the
most demanding clock tree designs. The devices employ a fully
differential PLL design to minimize cycle–to–cycle and phase jitter.
external feedback input. These features make the MPC953 ideal for use
as a zero delay, low skew fanout buffer. The device performance has
been tuned and optimized for zero delay performance. The MR/OE input
pin will reset the internal counters and tristate the output buffers when
driven “high”.
MPC953 is in phase–lock, the output frquency will slew slowly downward.
The final VCO frequency will be around TBDMHz.
filter components. All control inputs accept LVCMOS or LVTTL
compatible levels while the outputs provide LVCMOS levels with the
ability to drive terminated 50
50
device an effective fanout of 1:18. The device is packaged in a 7x7mm
32–lead TQFP package to provide the optimum combination of board
density and performance.
This document contains information on a product under development. Motorola reserves the right to change or
discontinue this product without notice.
9/97
MOTOROLA
SEMICONDUCTOR TECHNICAL DATA
Motorola, Inc. 1997
Fully Integrated PLL
Output Frequency up to 87.5MHz
Outputs Disable in High Impedance
TQFP Packaging
100ps Cycle–to–Cycle Jitter
The MPC953 is a 3.3V compatible, PLL based clock driver device
The MPC953 has a differential LVPECL reference input along with an
If the reference clock (PECL_CLK) is lost or shut down when the
The MPC953 is fully 3.3V compatible and requires no external loop
PECL_CLK
PECL_CLK
lines, each of the MPC953 outputs can drive two traces giving the
VCO_SEL
BYPASS
FB_CLK
MR/OE
transmission lines. For series terminated
Detector
Phase
1
LPF
Figure 1. Logic Diagram
200–350MHz
VCO
2
REV 0.1
PLL CLOCK DRIVER
32–LEAD TQFP PACKAGE
LOW VOLTAGE
MPC953
4
CASE 873A–02
FA SUFFIX
7
QFB
Q0:6
Q7

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MPC953FA Summary of contents

Page 1

... TQFP package to provide the optimum combination of board density and performance. PECL_CLK PECL_CLK Phase Detector FB_CLK VCO_SEL BYPASS MR/OE This document contains information on a product under development. Motorola reserves the right to change or discontinue this product without notice. 9/97 Motorola, Inc. 1997 VCO LPF 200–350MHz 2 Figure 1. Logic Diagram 1 REV 0 ...

Page 2

... Storage Temperature Range * Absolute maximum continuous ratings are those 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 under absolute–maximum–rated conditions is not implied. MOTOROLA ...

Page 3

... 40mA, Note 2. 120 Per Output 75 mA All VCC Pins 20 mA VCCA Pin Only Max Unit Condition MHz 75 % Max Unit Condition 1.0 ns 0 350 MHz 87.5 MHz VCO_SEL = ‘0’ X+100 ps f ref = 75MHz 100 MOTOROLA ...

Page 4

... Although the MPC953 has several design features to minimize the susceptibility to power supply noise (isolated power and grounds and fully differential PLL) there still may MOTOROLA 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 ...

Page 5

... SPICE level output buffer models are available for engineers who want to simulate their specific interconnect schemes. In addition IV characteristics are in the process of being generated to support the other board level simulators in general use MPC953 MOTOROLA ...

Page 6

... –AB– SEATING –AC– PLANE 0.10 (0.004 DETAIL AD MOTOROLA OUTLINE DIMENSIONS FA SUFFIX TQFP PACKAGE CASE 873A–02 ISSUE A 0.20 (0.008) AB T–U Z –U– 0.20 (0.008) AC T–U Z NOTES: 1. DIMENSIONING AND TOLERANCING PER ANSI 2. CONTROLLING DIMENSION: MILLIMETER. 3. DATUM PLANE – ...

Page 7

... Motorola reserves the right to make changes without further notice to any products herein. Motorola makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does Motorola assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation consequential or incidental damages. “ ...

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