Electronic Components Datasheet Search
  English  ▼

Delete All
ON OFF
ALLDATASHEET.COM

X  

Preview PDF Download HTML

LMX2305 Datasheet(PDF) 7 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
Part No. LMX2305
Description  PLLatinumTM 550 MHz Frequency Synthesizer for RF Personal Communications
Download  14 Pages
Scroll/Zoom Zoom In 100% Zoom Out
Maker  NSC [National Semiconductor (TI)]
Homepage  http://www.national.com
Logo 

LMX2305 Datasheet(HTML) 7 Page - National Semiconductor (TI)

Zoom Inzoom in Zoom Outzoom out
 7 / 14 page
background image
Functional Description (Continued)
PROGRAMMABLE DIVIDER (N COUNTER)
The N counter consists of the 7-bit swallow counter (A counter) and the 11-bit programmable counter (B counter) If the Control
Bit (last bit shifted into the Data Register) is LOW data is transferred from the 19-bit shift register into a 7-bit latch which sets
the 7-bit Swallow (A) Counter and an 11-bit latch which sets the 11-bit programmable (B) Counter Serial data format is shown
below
TLW12459 – 15
Note
S8 to S18 Programmable counter divide ratio control bits (3 to 2047)
7-BIT SWALLOW COUNTER DIVIDE RATIO
(A COUNTER)
Divide
N
7
N
6
N
5
N
4
N
3
N
2
N
1
Ratio
A
0
0
000000
1
0
000001
#
#
######
127
1111111
Note
Divide ratio 0 to 127
B t A
11-BIT PROGRAMMABLE COUNTER DIVIDE RATIO
(B COUNTER)
Divide
18
N
17
N
16
N
15
N
14
N
13
N
12
N
11
N
10
NN
9
N
8
Ratio
B
3
000000000
1
1
4
000000001
0
0
#
#########
#
#
2047
1
1
1
1
1
1
1
1
1
1
1
Note
Divide ratio 3 to 2047 (Divide ratios less than 3 are prohibited)
B t A
PULSE SWALLOW FUNCTION
fVCO e (P c B) a A c fOSC R
fVCO Output frequency of external voltage controlled oscil-
lator (VCO)
B
Preset divide ratio of binary 11-bit programmable
counter (3 to 2047)
A
Preset divide ratio of binary 7-bit swallow counter
(0 s A s 127 A s B)
fOSC Output frequency of the external reference frequency
oscillator
R
Preset divide ratio of binary 14-bit programmable ref-
erence counter (3 to 16383)
P
Preset modulus of dual modulus prescaler (64 or 128)
http
www nationalcom
7


Html Pages

1  2  3  4  5  6  7  8  9  10  11  12  13  14 


Datasheet Download




Link URL




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

About Alldatasheet   |   Advertisement   |   Datasheet Upload   |   Contact us   |   Privacy Policy   |   Alldatasheet API   |   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