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DS1085 Datasheet(PDF) 1 Page - Dallas Semiconductor

Part # DS1085
Description  EconOscillator Frequency Synthesizer
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Manufacturer  DALLAS [Dallas Semiconductor]
Direct Link  https://www.maximintegrated.com/en.html
Logo DALLAS - Dallas Semiconductor

DS1085 Datasheet(HTML) 1 Page - Dallas Semiconductor

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122002
FEATURES
§ User-Programmable Frequency Synthesizer
§ Programmable From 8.1kHz to 133MHz
§ Dual Synchronous Outputs
§ 8.2MHz to 133MHz Reference Oscillator
Output
§ 8.1kHz to 133MHz Main Oscillator Output
§ Three Resolution Options
§ 2-Wire Serial Interface
§ 0.75% Absolute Accuracy
§ Nonvolatile (NV) Frequency Settings
§ Single 5V Supply
§ No External Timing Components
§ Power-Down Mode
PIN ASSIGNMENT
PIN DESCRIPTION
OUT1
- Main Oscillator Output
OUT0
- Reference Oscillator Output
VCC
- Power-Supply Voltage
GND
- Ground
CTRL1
- Control Pin for OUT1
CTRL0
- Control Pin for OUT0
SDA
- 2-Wire Serial Data Input/Output
SCL
- 2-Wire Serial Clock
ORDERING INFORMATION
DEVICE
PACKAGE
STEP
SIZE
OSCILLATOR
OUTPUT RANGE
DS1085Z-10
150mil SO
10kHz
8.1kHz to 133MHz
DS1085Z-25
150mil SO
25kHz
8.1kHz to 133MHz
DS1085Z-50
150mil SO
50kHz
8.1kHz to 133MHz
DESCRIPTION
The DS1085 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 66MHz to 133MHz with three
resolution options of 10kHz, 25kHz, and 50kHz. 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 8.2MHz to
133MHz. A second independent prescaler and a 1-to-1025 divider allows the generation of a main
oscillator output (OUT1) from 8.1kHz to 133MHz. 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 DS1085 can be
used with factory- or user-programmed values.
DS1085
EconOscillator Frequency Synthesizer
www.maxim-ic.com
SO (150mil)
SCL
CTRL0
CTRL1
OUT1
OUT0
VCC
GND
8
7
6
5
1
2
3
4
SDA
EconOscillator is a trademark of Dallas Semiconductor.


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