DS1073M-80

Overview

The DS1073M-80 is a fixed-frequency oscillator and divider from Analog Devices Inc./Maxim Integrated, operating within a 2.7V to 3.6V supply range. It provides a dual output at 80MHz with an initial tolerance of ±0.5% and frequency variation of ±1% over commercial temperature and voltage ranges. The device features user-programmable on-chip dividers (1 to 513) and prescalers (1, 2, 4), allowing flexible frequency generation without external components. It supports internal clock, external clock, or crystal reference options and includes power-down and synchronous output gating capabilities.

Feature Summary

• Dual fixed-frequency outputs with programmable on-chip dividers (1 to 513) and prescalers (1, 2, 4).
• No external components required for operation; stores settings in non-volatile memory.
• Supports internal clock, external clock, or crystal reference inputs.
• Features synchronous output gating and power-down mode for reduced current consumption.

Applications

• Clock signal generation for digital systems.
• Timing reference sources for microprocessors and memory interfaces.
• Frequency synthesis in communication equipment.

Procurement Notes

Verify the specific suffix 'M' indicates the 300-mil DIP package variant. Confirm the '-80' suffix corresponds to the 80.000MHz maximum output frequency option. Ensure the device matches the required temperature range specifications for your application environment.

Selection Notes

Select the DS1073M-80 when an 80MHz fixed frequency output is required with high initial accuracy. Consider the industrial temperature range variant if operation below 0°C or above 70°C is necessary, noting the relaxed frequency variation specification. Evaluate the need for external references versus internal oscillator based on system jitter requirements.

Part Context

The DS1073 series includes variants such as DS1073M/Z-100 (100MHz), DS1073M/Z-66 (66.667MHz), and DS1073M/Z-60 (60.000MHz). The 'M' suffix denotes the 300-mil DIP package, while 'Z' denotes the 150-mil SOIC package. All variants share the same core functionality and programming interface.

Replacement Considerations

Direct replacements include other DS1073 variants with different frequency options (e.g., DS1073M-100, DS1073M-66) if the frequency requirement changes. Cross-model substitution requires verifying package compatibility and register programming settings.

FAQ

How is the device programmed?

The DS1073 is programmed using a 1-Wire protocol variant via the I/O pin. Programming mode is entered by powering up the device with a pullup resistor connected between I/O and VCC.

What is the function of the PDN/SELX pin?

The PDN/SELX pin can be configured via the PDN bit to either enable power-down mode (active low) or allow on-the-fly selection between internal and external/crystal references.

Can the output duty cycle be adjusted?

The datasheet specifies a typical output duty cycle of 40% to 60% for both OUT and OUT0 pins but does not indicate user-adjustable duty cycle control.