DS1075Z-80/T&R

Overview

The DS1075Z-80/T&R is a fixed-frequency oscillator and divider from the EconOscillator family, manufactured by Analog Devices/Maxim Integrated. It provides dual outputs at a maximum frequency of 80 MHz with no external components required for basic operation. The device features user-programmable on-chip dividers (range 2–513) and prescalers (divide-by-2 or 4), with settings stored in nonvolatile EEPROM. It operates on a single 5V supply, offering initial frequency tolerance of ±0.5% and variation over temperature/voltage of ±1%. Key interfaces include an Output Enable (OE) pin for synchronous gating and a PDN/SELX pin configurable for power-down or reference selection.

Feature Summary

• Dual Fixed Frequency Outputs: Supports frequencies up to 80 MHz with internal oscillator or external/crystal reference options.
• User-Programmable Architecture: On-chip prescaler (1, 2, 4) and programmable divider (2–513) allow flexible frequency generation via 1-Wire programming.
• Synchronous Output Gating: OE pin ensures glitch-free output enable/disable without pulse truncation.
• Low Power Modes: Configurable power-down mode reduces current consumption to 0.8 µA typical.

Applications

• Microcontroller system clock generation
• Real-time clock (RTC) reference sources
• Communication interface timing circuits

Procurement Notes

Verify package type compatibility; the 'Z' suffix indicates SOIC-8 packaging, while 'M' indicates DIP-8. Confirm programming status if specific factory presets are required, as devices ship with default divider values. Ensure pull-up resistor constraints on the IN/OUT pin are met during programming to avoid mode entry issues.

Selection Notes

Select the DS1075Z-80 variant when an 80 MHz maximum output is needed. Choose between internal oscillator (default) or external reference based on jitter and stability requirements. Use the PDN/SELX configuration bit to determine if the pin should control power states or switch references dynamically. Ensure load capacitance does not exceed 15 pF for guaranteed AC performance.

Part Context

The DS1075 series belongs to Maxim Integrated's EconOscillator line, designed to replace discrete crystal oscillator circuits. The DS1075Z-80 specifically targets applications requiring an 80 MHz clock source. It is part of a broader family including variants like DS1075-100 (100 MHz) and DS1075-60 (60 MHz), sharing identical pinouts and programming protocols but differing in maximum operating frequency.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Designers may consider other DS1075 variants (e.g., DS1075Z-100, DS1075Z-60) if frequency adjustments are permissible, or consult manufacturer resources for modern replacements.