19
MOTOROLA
MC88915T System Level Testing Functionality
3–state functionality has been added to the 100MHz version of the MC88915T to ease system board testing. Bringing the
OE
/RST pin low will put all outputs (except for LOCK) into the high impedance state. As long as the PLL_EN pin is low, the
Q0–Q4, Q5, and the Q/2 outputs will remain reset in the low state after the OE
/RST until a falling SYNC edge is seen. The 2X_Q
output will be the inverse of the SYNC signal in this mode. If the 3–state functionality will be used, a pull–up or pull–down resistor
must be tied to the FEEDBACK input pin to prevent it from floating when the fedback output goes into high impedance.
With the PLL_EN pin low the selected SYNC signal is gated directly into the internal clock distribution network, bypassing
and disabling the VCO. In this mode the outputs are directly driven by the SYNC input (per the block diagram). This mode can
also be used for low frequency board testing.
Note: If the outputs are put into 3–state during normal PLL operation, the loop will be broken and phase–lock will be lost. It will
take a maximum of 10mS (tLOCK spec) to regain phase–lock after the OE
/RST pin goes back high.
Figure 7. Representation of a Potential Multi–Processing Application Utilizing the MC88915T
for Frequency Multiplication and Low Board–to–Board Skew















 





 







 
  
 
  



20
MOTOROLA
OUTLINE DIMENSIONS
FN SUFFIX
PLASTIC PACKAGE
CASE 776–02
ISSUE D

      
     
     
      
    
     
     
   
    
  
   
      
      
    
  
    
     
    
    
      
 
    
    
    
     
    
      
   
–N–
–M–
–L–
V
W
D
D
Y BRK

VIEW S





G1
G
J
C
Z
R
E
A




–T–
B




U


Z
G1X
VIEW D–D


K1
VIEW S
H
K
F


    

   
   
   
   
   
 
   
   
   
   
   
   
   
   
   
   
    
    
 
21
MOTOROLA
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. “Typical” parameters which may be provided in Motorola
data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. All operating parameters, including “Typicals”
must be validated for each customer application by customer’s technical experts. Motorola does not convey any license under its patent rights nor the rights of
others. Motorola products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other
applications intended to support or sustain life, or for any other application in which the failure of the Motorola product could create a situation where personal injury
or death may occur. Should Buyer purchase or use Motorola products for any such unintended or unauthorized application, Buyer shall indemnify and hold Motorola
and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees
arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that
Motorola was negligent regarding the design or manufacture of the part. Motorola and are registered trademarks of Motorola, Inc. Motorola, Inc. is an Equal
Opportunity/Affirmative Action Employer.
MOTOROLA and the Stylized M Logo are registered in the US Patent & Trademark Office. All other product or service names are the property of their
respective owners. Motorola, Inc. 2001.
How to reach us:
USA/EUROPE/Locations Not Listed: Motorola Literature Distribution; P.O. Box 5405, Denver, Colorado 80217. 1–303–675–2140 or 1–800–441–2447
JAPAN: Motorola Japan Ltd.; SPS, Technical Information Center, 3–20–1, Minami–Azabu. Minato–ku, Tokyo 106–8573 Japan. 81–3–3440–3569
ASIA/PACIFIC: Motorola Semiconductors H.K. Ltd.; Silicon Harbour Centre, 2 Dai King Street, Tai Po Industrial Estate, Tai Po, N.T., Hong Kong. 852–26668334
Technical Information Center: 1–800–521–6274
HOME PAGE: http://www.motorola.com/semiconductors/
MC88915T/D

MC88915TFN55

Mfr. #:
Manufacturer:
NXP Semiconductors
Description:
IC DRIVER CLK PLL 55MHZ 28-PLCC
Lifecycle:
New from this manufacturer.
Delivery:
DHL FedEx Ups TNT EMS
Payment:
T/T Paypal Visa MoneyGram Western Union