Electronic Components Datasheet Search
  English  ▼

Delete All
ON OFF
ALLDATASHEET.COM

X  

Preview PDF Download HTML

AND8001 Datasheet(PDF) 2 Page - ON Semiconductor

Part No. AND8001
Description  ODD NUMBER DIVIDE BY COUNTERS WITH 50% OUTPUTS AND SYNCHRONOUS CLOCKS
Download  8 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Manufacturer  ONSEMI [ON Semiconductor]
Direct Link  http://www.onsemi.com
Logo ONSEMI - ON Semiconductor

AND8001 Datasheet(HTML) 2 Page - ON Semiconductor

  AND8001 Datasheet HTML 1Page - ON Semiconductor AND8001 Datasheet HTML 2Page - ON Semiconductor AND8001 Datasheet HTML 3Page - ON Semiconductor AND8001 Datasheet HTML 4Page - ON Semiconductor AND8001 Datasheet HTML 5Page - ON Semiconductor AND8001 Datasheet HTML 6Page - ON Semiconductor AND8001 Datasheet HTML 7Page - ON Semiconductor AND8001 Datasheet HTML 8Page - ON Semiconductor  
Zoom Inzoom in Zoom Outzoom out
 2 / 8 page
background image
AND8001/D
http://onsemi.com
2
Using the technique, we add a gate on the clock to get
differential Clock and Clock bar, a flip flop that triggers on
the Clock Bar rising edge (Clock Neg.) to shift the output of
”B” by 90 degrees and a gate to AND/OR two FF output to
produce the 50% output. We get Figure 2, a Divide By 3 that
clocks synchronously with 50% output duty cycle.
Figure 2.
Q
Q
D
C
Q
Q
D
C
Divide By 3 W/50% out
Q
Q
D
C
50% Out
Clk in
ABC
Clk
AQ
BQ
CQ
OUT
The Max frequency of the configuration (figure 2) is
calculated as Clock input freq./2 = Tpd of FF ”B” + Setup
of ”C” + Hold of ”C”.
Example:
Tpd = 1Ns, Setup = !NS and Hold time = 0Ns.
with these numbers the Max Frequency the configuration
can expect is; Cycle time = 2*(1 + 1)Ns or 4 Ns that converts
to 250MHZ.
The Method is usable on other divide by ”N” counters as
well by using the same methodology. The use of different
types of Flip Flops (J,K, S,R, Toggle, ETC.) may produce
fewer components. The type logic used may also dictate
configuration. The configuration should always be checked
for lockup conditions before the design is committed to a
production.
Example:
A Divide By 3 design has all possible states shown in chart
1 but uses only the states shown in chart 2 leaving the states
2,3,4,5, & 7 for possible lockup.
ABC
0000
1100
2010
3110
4001
5101
6011
7111
Chart 1
Chart 2
ABC
0000
1100
6011


Html Pages

1  2  3  4  5  6  7  8 


Datasheet Download

Go To PDF Page


Link URL




Privacy Policy
ALLDATASHEET.COM
Does ALLDATASHEET help your business so far?  [ DONATE ] 

About Alldatasheet   |   Advertisement   |   Datasheet Upload   |   Contact us   |   Privacy Policy   |   Link Exchange   |   Manufacturer List
All Rights Reserved©Alldatasheet.com


Mirror Sites
English : Alldatasheet.com  |   English : Alldatasheet.net  |   Chinese : Alldatasheetcn.com  |   German : Alldatasheetde.com  |   Japanese : Alldatasheet.jp
Russian : Alldatasheetru.com  |   Korean : Alldatasheet.co.kr  |   Spanish : Alldatasheet.es  |   French : Alldatasheet.fr  |   Italian : Alldatasheetit.com
Portuguese : Alldatasheetpt.com  |   Polish : Alldatasheet.pl  |   Vietnamese : Alldatasheet.vn