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DS1075-80 Datasheet

  • DS1075-80

  • EconOscillator/Divider

  • 18頁(yè)

  • DALLAS   DALLAS

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DS1075
EconOscillator/Divider
www.maxim-ic.com.com
FEATURES
摟
摟
摟
摟
摟
摟
摟
摟
摟
摟
Dual Fixed frequency outputs
(30 KHz - 100 MHz)
User-programmable on-chip dividers
(from 1 - 513)
User-programmable on-chip prescaler
(1, 2, 4)
No external components
鹵0.5%
Initial tolerance
鹵1%
variation over temperature and voltage
Internal clock, External clock or crystal
reference options
Single 5V supply
Power-down mode
Synchronous output gating
PIN ASSIGNMENT
I/O
OUT0
V
CC
GND
1
2
3
4
8
7
6
5
OSCIN
XTAL
OE
PDN/SELX
DS1075Z 150-MIL SOIC
DS1075M 300-MIL DIP
FREQUENCY OPTIONS
Part No.
DS1075-100
DS1075-80
DS1075-66
DS1075-60
Max O/P freq.
100.000 MHz
80.000 MHz
66.667 MHz
60.000 MHz
DESCRIPTION
The DS1075 is a fixed frequency oscillator requiring no external components for operation. Numerous
operating frequencies are possible in the range of approximately 30 KHz to 100 MHz through the use of
an on-chip programmable prescaler and divider.
The DS1075 features a master oscillator followed by a prescaler and then a programmable divider. The
prescaler and programmable divider are user-programmable with the desired values being stored in
nonvolatile memory. This allows the user to buy an off the shelf component and program it on site prior
to board production. Design changes can be readily accommodated by programming, or reprogramming,
the desired values into the on-chip nonvolatile registers. Evaluation boards, DS1075K and DS1070K are
available to simplify this task.
The DS1075 is shipped from the factory configured for half the maximum operating frequency. Contact
the factory for specially programmed devices. As alternatives to the on-board oscillator an external clock
signal or a crystal may be used as a reference. The choice of reference source (internal or external) is
user-selectable at the time of programming (or on the fly if the SEL mode is chosen).
The DS1075 features a dual-purpose Input/Output pin. If the device is powered up in Program mode this
pin can be used to input serial data to the on-chip registers. After a Write command this data is stored in
nonvolatile memory. When the chip is subsequently powered up in operating mode these values are
automatically restored to the on-chip registers and the Input/Output pin becomes the oscillator output.
The DS1075 is available in 8-pin DIP or SOIC packages, allowing the generation of a clock signal easily,
economically and using minimal board area.
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