![]() |
Electronic Components Datasheet Search |
|
LMX2306 Datasheet(PDF) 8 Page - National Semiconductor (TI) |
|
|
|
LMX2306 Datasheet(HTML) 8 Page - National Semiconductor (TI) |
8 / 19 page ![]() 1.0 Functional Description (Continued) 1.2 PROGRAMMABLE DIVIDER (N COUNTER) The N counter consists of the 5-bit swallow counter (A counter) and the 13-bit programmable counter (B counter). If the Control Bits are [C 1,C2] = [1,0], data is transferred from the 21-bit shift register into a 5-bit latch (which sets the Swallow (A) Counter), a 13-bit latch (which sets the 13-bit programmable (B) Counter), and the GO bit (See Section 1.3.4 FastLock MODES section) MSB first. For the LMX2306 the maximum N value is 65535 and the minimum N value is 56. For the LMX2316/26, the maximum N value is 262143 and the minimum N value is 992. Serial data format is shown below. 1.2.1 5-BIT SWALLOW COUNTER DIVIDE RATIO (A COUNTER) LMX2316/26 Divide NNNNN Ratio 54321 0 00000 1 00001 • ••••• 31 11111 Note: Divide ratio: 0 to 31 B ≥ A LMX2306 Divide NNNNN Ratio 54321 0 X X 000 1 X X 001 • ••••• 7 X X 111 Note: Divide ratio: 0 to 7 B ≥ A X denotes a Don’t Care condition 1.2.2 13-BIT PROGRAMMABLE COUNTER DIVIDE RATIO (B COUNTER) Divide NNNNNNNNN NNNN Ratio 18 17 16 15 14 13 12 11 10 9876 3 000000000 0011 4 000000000 0100 • ••••••••• •••• 8191 111111111 1111 Divide ratio: 3 to 8191 (Divide ratios less than 3 are prohibited) B ≥A 1.2.3 PULSE SWALLOW FUNCTION fvco = [(P x B) + A] x fosc/R f vco: Output frequency of external voltage controlled oscillator (VCO) B: Preset divide ratio of binary 13-bit programmable counter (3 to 8191) A: Preset divide ratio of binary 5-bit swallow counter (0 ≤ A ≤ 31; A ≤ B for LMX2316/26) or (0 ≤ A ≤ 7, A ≤ B for LMX2306) f osc: Output frequency of the external reference frequency oscillator R: Preset divide ratio of binary 14-bit programmable reference counter (3 to 16383) P: Preset modulus of dual modulus prescaler for the LMX2306; P = 8 for the LMX2316/26; P = 32 DS100127-6 Note: Data is shifted in MSB first. www.national.com 8 |
Similar Part No. - LMX2306 |
|
Similar Description - LMX2306 |
|
|
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 |
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 Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
Family Site : ic2ic.com |
icmetro.com |