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100899

FEATURES

§ 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

§ ±0.5% Initial tolerance

§ ±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

FREQUENCY OPTIONS

Part No.

Max O/P freq.

DS1075-100

100.000 MHz

DS1075-80

80.000 MHz

DS1075-66

66.667 MHz

DS1075-60

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.

DS1075

EconOscillator/Divider

www.maxim-ic.com.com

I/O

OUT0

GND

OSCIN

PDN/SELX

XTAL

OE

1

2

3

4

8

7

6

5

DS1075Z 150-MIL SOIC

DS1075M 300-MIL DIP