DS1077Z-203+

Overview

The DS1077Z-203+ is a dual-output, programmable, fixed-frequency oscillator from the EconOscillator/Divider family. It operates on a single 5V supply (4.75V to 5.25V) and requires no external components. The device features two synchronous outputs with frequencies ranging from 8.1kHz to 133MHz, determined by internal prescalers and a programmable divider. Frequency settings are stored in nonvolatile EEPROM memory, allowing for processor-controlled or standalone operation via a 2-wire serial interface. It supports power-down modes and synchronous output gating.

Feature Summary

• Dual low-jitter, synchronous fixed frequency outputs
• 2-wire serial interface for on-the-fly programming
• Nonvolatile (NV) frequency settings stored in EEPROM
• ±0.5% initial tolerance and ±0.5% variation over temperature (+25°C to +70°C)

Applications

• Processor-controlled frequency synthesizers
• Standalone clock generation for microcontrollers
• System clock distribution

Procurement Notes

Verify the specific frequency option associated with the suffix '203' against official Analog Devices documentation, as standard listed options include 133, 125, 120, 100, and 66 MHz designations. Confirm package availability in 8-pin SO format. Check current lifecycle status as some DS1077 variants may be discontinued.

Selection Notes

Select based on required master frequency and output division ratios. Ensure the application voltage stays within 4.75V to 5.25V. Consider power consumption requirements; disabling unused outputs and adjusting prescaler divisors can significantly reduce active supply current. Verify I2C bus speed compatibility (Standard 100kHz or Fast 400kHz).

Part Context

The DS1077 series belongs to Maxim Integrated's EconOscillator line, designed to replace discrete crystal oscillators and dividers. The 'Z' suffix indicates an 8-pin 150mil SO package. The '+T&R' suffix typically denotes tape and reel packaging, while '+' indicates RoHS compliance. This component integrates the oscillator, prescalers, and divider into a single chip.

Replacement Considerations

Direct replacements depend on the specific frequency generated by the '203' variant. Other DS1077 models (e.g., DS1077Z-100, DS1077Z-120) offer different master frequencies but share the same pinout and functionality. Cross-reference with DS1085 if higher voltage tolerance is needed.