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PDF SM5158A Data sheet ( Hoja de datos )
| Número de pieza | SM5158A | |
| Descripción | Serial input PLL frequency synthesizer | |
| Fabricantes | Nippon Precision Circuits Inc | |
| Logotipo |  |
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NIPPON PRECISION CIRCUITS INC.
SM5158A
Serial input PLL frequency synthesizer
OVERVIEW
The SM5158A is a serial data programma-
ble PLL Frequency Synthesizer LSI fabricated
in NPC's proprietary Molybdenum-gate
CMOS technology.
Ratios of reference frequency divider and
input frequency divider can be independently
set.
FEATURES
- Up to 200MHz input frequency
(VDD=4.5V)
- Up to 35MHz reference frequency
(VDD=4.5V)
- 5 to 65535 programmable reference
frequency divider ratio
- 1056 to 65535 programmable input
frequency divider ratio
- Lock detector
- Either Active or Passive filter can be
externally used.
- 16-pin plastic DIP and 16-pin S-SOP
- Molybdenum gate CMOS structure
PIN OUT
16-pin SSOP
XIN
XOUT
FV
VDD
DOP
VSS
LD
FIN
1
8
16-pin DIP
XIN
XOUT
FV
VDD
DOP
VSS
LD
FIN
1
8
16 OR
OV
TEST
FR
DOA
LE
DATA
9 CLK
16 OR
OV
TEST
FR
DOA
LE
DATA
9 CLK
NIPPON PRECISION CIRCUITS-1
1 page  
SM5158A
DIVIDER DATA SETTING PROCEDURE
CLK
12
34
56
7
8
9 10 11 12 13 14 15 16 17
DATA MSB
LSB
Control
LE
Input data must be MSB first. Final bit(17th
bit) is assigned to the control bit.
Data are written into shift register at the ris-
ing edge of the CLK signal.
When LE is HIGH,data is transferred from
the shift register to either the latch of refer-
ence divider or input divider. Thus data must
be written on the shift register while LE is
remaining LOW.
While all bits of the N latch to are "0", the N
counter will be disabled, DOA, DOP are
floating,and the supply current will be
decreased.
While all bits of the R latch are "O", oscilla-
tor will be disabled.
While all bits of R and N latches are "0", sup-
ply current decreases to 10uA or less.
16 BIT DATA FOR R or N latch
Latch select bit ( 1 : R-latch, 0 : N-latch )
NIPPON PRECISION CIRCUITS-5
5 Page | ||
| Páginas | Total 7 Páginas | |
| PDF Descargar | [ Datasheet SM5158A.PDF ] | |
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