DS1077Z-203+T&R

Overview

The DS1077Z-203+T&R is a dual-output, programmable fixed-frequency oscillator from the EconOscillator family. It operates on a single 5V supply and requires no external components. The device features two synchronous outputs (OUT0 and OUT1) with frequencies ranging from 8.1kHz to 133MHz. It utilizes a 2-wire serial interface for on-the-fly frequency programming and stores settings in nonvolatile EEPROM memory. Electrical characteristics include a ±0.5% initial tolerance and ±0.5% variation over temperature (+25°C to +70°C). The unit is housed in an 8-pin SO package.

Feature Summary

• Dual low-jitter, synchronous fixed-frequency outputs
• 2-wire serial interface for processor control or standalone operation
• Nonvolatile EEPROM storage for frequency settings
• Single 5V supply operation with power-down mode

Applications

• Processor-controlled frequency synthesizers
• Standalone clock generation systems
• In-circuit reprogrammable clock sources

Procurement Notes

Verify the specific frequency option code '203' against official Analog Devices documentation, as standard datasheet listings typically show codes like 133, 125, 120, 100, and 66. Confirm the 'Z' suffix indicates the 8-pin SO package and '+T&R' denotes tape and reel packaging. Ensure compatibility with the required master frequency range of 8.1kHz to 133MHz.

Selection Notes

Select this component when a dual-output clock source with nonvolatile memory is required. The DS1077 allows for submultiple frequency generation via internal prescalers and dividers. Verify that the application supports the 2-wire serial interface protocol if dynamic frequency changes are needed. Ensure the load capacitance requirements (up to 50pF) are met by the connected circuitry.

Part Context

The DS1077 is part of the Maxim Integrated (now Analog Devices) EconOscillator line, designed to replace discrete crystal oscillators and dividers. The 'Z' suffix specifies the 150mil SOIC package variant. This series enables cost-effective and space-saving clock solutions by integrating the oscillator, prescalers, and divider into a single chip.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Users should consult Analog Devices for current equivalent products within the EconOscillator family or modern replacements for discontinued items.

FAQ

How are the output frequencies determined?

Output frequencies are determined by the internal master oscillator divided by programmable prescalers (P0, P1) and a programmable divider (N), which are set via the 2-wire serial interface.

What happens to the frequency settings during a power cycle?

The frequency settings are stored in nonvolatile EEPROM memory, so the device defaults to the last programmed values upon power-up without requiring reprogramming.

Can the device be used without connecting the serial interface?

Yes, for fixed frequency applications, pre-programmed devices can be used where no connection to the SDA and SCL pins is required after manufacturing.