http://www.datasheet4u.com

900,000+ Datasheet PDF Search and Download

Datasheet4U offers most rated semiconductors datasheets pdf




Maxim Integrated Semiconductor Electronic Components Datasheet

DS1085L Datasheet

EconOscillator Frequency Synthesizer

No Preview Available !

DS1085L pdf
www.maxim-ic.com
FEATURES
§ User-Programmable Frequency Synthesizer
§ Programmable From 4.1kHz to 66MHz
§ Dual Synchronous Outputs
§ 4.13MHz to 66MHz Reference Oscillator
Output
§ 4.1kHz to 66MHz Main Oscillator Output
§ Single 3.0 to 3.6V Supply
§ Three Resolution Options
§ 2-Wire Serial Interface
§ 0.75% Absolute Accuracy
§ Nonvolatile (NV) Frequency Settings
§ No External Timing Components
§ Power-Down Mode
ORDERING INFORMATION
www.DataSheet4U.com
DEVICE
DS1085LZ-5
DS1085LZ-12
DS1085LZ-25
PACKAGE
150mil SO
150mil SO
150mil SO
STEP
SIZE
5kHz
12.5kHz
25kHz
DS1085L
3.3V EconOscillator Frequency
Synthesizer
PIN ASSIGNMENT
OUT1
OUT0
VCC
GND
18
27
36
45
SO (150mil)
SCL
SDA
CTRL1
CTRL0
PIN DESCRIPTION
OUT1
OUT0
VCC
GND
CTRL1
CTRL0
SDA
SCL
- Main Oscillator Output
- Reference Oscillator Output
- Power-Supply Voltage
- Ground
- Control Pin for OUT1
- Control Pin for OUT0
- 2-Wire Serial Data Input/Output
- 2-Wire Serial Clock
OSCILLATOR
OUTPUT RANGE
4.1kHz to 66MHz
4.1kHz to 66MHz
4.1kHz to 66MHz
DESCRIPTION
The DS1085L is a dual-output frequency synthesizer requiring no external timing components for
operation. It can be used as a standalone oscillator or as a dynamically programmed, processor-controlled
peripheral device. An internal master oscillator can be programmed from 33MHz to 66MHz with three
resolution options of 5kHz, 12.5kHz, and 25kHz. A programmable 3-bit prescaler (divide-by-1, 2, 4, or 8)
permits the generation of a reference oscillator output (OUT0) from the master, ranging from 4.13MHz to
66MHz. A second independent prescaler and a 1-to-1025 divider allow the generation of a main oscillator
output (OUT1) from 4.1kHz to 66MHz. The two outputs, although synchronous with the master, can be
independently programmed. The combination of programmable master oscillator, prescalers, and dividers
allows the generation of thousands of user-specified frequencies. All master oscillator, prescaler, and
divider settings are stored in NV (EEPROM) memory, providing a default value on power-up that allows
it to be used as a standalone oscillator. A 2-wire serial interface allows in-circuit, on-the-fly programming
of the master oscillator, prescalers (P0 and P1), and divider (N). This allows dynamic frequency
modification, if required, or, for fixed-frequency applications, the DS1085L can be used with factory- or
user-programmed values.
EconOscillator is a trademark of Dallas Semiconductor.
1 of 21
021403


Maxim Integrated Semiconductor Electronic Components Datasheet

DS1085L Datasheet

EconOscillator Frequency Synthesizer

No Preview Available !

DS1085L pdf
DS1085L
External control inputs, CTRL1 and CTRL0, enable or disable the two oscillator outputs. Both outputs
feature a synchronous enable that ensures no output glitches when the output is enabled and a constant
time interval (for a given frequency setting) from an enable signal to the first output transition. These
inputs can also be configured to disable the master oscillator, putting the device into a low-power mode
for power-sensitive applications.
Figure 1. DS1085L BLOCK DIAGRAM
0M0 0M1
1M0 1M1
OVERVIEW
A block diagram of the DS1085L is shown in Figure 1. The DS1085L consists of five major components:
§ Internal master oscillator (33MHz to 66MHz)
§ Master oscillator control DAC
§ Prescalers (divide-by-1, 2, 4, or 8)
§ Programmable divider (divide-by-1 to 1025)
§ Control registers
The internal master oscillator provides the reference clock (MCLK), which is fed to the prescalers and
programmable dividers. The frequency of the oscillator can be user-programmed over a two-to-one range
in increments equal to the step size, by means of a 10-bit control DAC. The master oscillator range is
33MHz to 66MHz, which is larger than the range possible with the 10-bit DAC resolution and available
step sizes. Therefore, an additional register (OFFSET) is provided that can be used to select the range of
frequency over which the DAC is used (see Table 1).
2 of 21


Part Number DS1085L
Description EconOscillator Frequency Synthesizer
Maker Maxim Integrated Products
Total Page 21 Pages
PDF Download
DS1085L pdf
Download PDF File


Buy Electronic Components




Related Datasheet

1 DS1085 EconOscillator Frequency Synthesizer Dallas Semiconductor
Dallas Semiconductor
DS1085 pdf
2 DS1085L EconOscillator Frequency Synthesizer Maxim Integrated Products
Maxim Integrated Products
DS1085L pdf






Part Number Start With

0    1    2    3    4    5    6    7    8    9    A    B    C    D    E    F    G    H    I    J    K    L    M    N    O    P    Q    R    S    T    U    V    W    X    Y    Z

site map

webmaste! click here

contact us

Buy Components