DS1075Z-166 Datasheet

DS1075 EconOscillator/Divider

Part Datasheet
DS1075Z-166 DS1075Z-166 DS1075Z-166 (pdf)
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PDF Datasheet Preview
DS1075 EconOscillator/Divider

§ 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 § Initial tolerance

3 6 OE 4 5 PDN/SELX

DS1075Z 150-MIL SOIC DS1075M 300-MIL DIP
§ ±1% variation over temperature and voltage
§ Internal clock, External clock or crystal
reference options § Single 5V supply § Power-down mode § Synchronous output gating


Max O/P freq.





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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-100 080 -66 -60


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Input/Output Pin IN/OUT This pin is the main oscillator output, with a frequency determined by clock reference, M and N dividers. Except in programming mode this pin is always an output and will be referred to as “OUT”. In programming mode this pin will be referred to as “IN”.

External Oscillator Input OSCIN This pin can be used to supply an external reference frequency to the device.

Crystal Oscillator Connection XTAL A crystal can be connected between this pin and OSCIN to provide an alternative frequency reference. If a crystal is not used this pin should be left open.

Output Enable Function OE pin The DS1075 also features a “synchronous” output enable. When OE is at a high logic level the oscillator free runs. When this pin is taken low OUT is held low, immediately if OUT is already low, or at it’s next high-to-low transition if OUT is high. This prevents any possible truncation of the output pulse width when the enable is used. While the output is disabled the master oscillator continues to run producing an output at OUT0, if the EN0 bit = 0 but the internal counters /N are reset. This results in a constant phase relationship between OE’s return to a high level and the resulting OUT signal. When the enable is released OUT will make its first transition within one to two clock periods of the master clock.

Power-Down/Select Function PDN / SELX PDN/SELX pin The Power-Down/Select PDN / SELX pin has a user-selectable function determined by one bit PDN bit of the user-programmable memory. According to which function is selected, this pin will be referred to as PDN or SELX
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Datasheet ID: DS1075Z-166 508379