DS1077LZ-40

Overview

The DS1077LZ-40 is a dual-output, programmable fixed-frequency oscillator from the EconOscillator family. It operates on a single 2.7V to 3.6V supply with an internal master clock of 40MHz. The device generates two synchronous outputs (OUT0 and OUT1) via programmable prescalers and dividers, covering frequencies from 4.87kHz to 40MHz. It features nonvolatile EEPROM storage for frequency settings and a 2-wire serial interface for in-circuit programming. Key specifications include ±0.5% initial tolerance, ±1.25% variation over temperature/voltage, and low jitter performance.

Feature Summary

• Dual synchronous outputs with independent programmable prescalers and dividers
• Nonvolatile EEPROM memory retains frequency settings without external components
• 2-wire serial interface supports standard (100kHz) and fast (400kHz) modes
• Smart output enable and power-down control via CTRL0 and CTRL1 pins

Applications

• Processor-controlled frequency synthesizers
• Stand-alone solid-state oscillators
• In-circuit on-the-fly frequency programming
• Fixed-frequency applications requiring minimal board area

Procurement Notes

Verify the package suffix 'Z' corresponds to the 8-pin 150mil SOIC format. Confirm the '-40' designation indicates the 40MHz master frequency option. Ensure the source document matches the official Analog Devices/Maxim Integrated datasheet for electrical accuracy.

Selection Notes

Select this model when a 40MHz master clock is required. Choose the Z package for standard SOIC mounting. Consider the LU variant if a smaller 118mil µSOP package is needed. Verify that the 2-wire interface compatibility matches the system controller.

Part Context

This component belongs to the DS1077L series of 3V EconOscillators. Other variants include the DS1077LZ-50 (50MHz), DS1077LZ-60 (60MHz), and DS1077LZ-66 (66.666MHz). All share identical pinouts and functionality, differing only in the factory-trimmed internal oscillator frequency.

Replacement Considerations

Direct substitutes within the same family are DS1077LZ-50, DS1077LZ-60, and DS1077LZ-66. These parts are pin-compatible but operate at different master frequencies. Cross-family replacements require verification of voltage levels and interface protocols.