DS1077U-100+T&R

Overview

The DS1077U-100+T&R is a dual-output, programmable fixed-frequency oscillator from the EconOscillator 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. It includes a 2-wire serial interface for on-the-fly programming of prescalers and dividers, with settings stored in nonvolatile EEPROM memory. Key electrical parameters include an active supply current of 50mA typical, standby current of 5µA, and output jitter of 30ps pk-to-pk at 133MHz.

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 for microcontrollers
• System clock distribution requiring minimal board area

Procurement Notes

Verify the 'U' suffix indicates the 8-pin 118mil µSOP package. Confirm the '+T&R' suffix corresponds to tape and reel packaging if required for assembly. Check for RoHS compliance status as indicated by the '+' suffix in official documentation.

Selection Notes

Select this model for applications requiring a 100MHz master frequency option within the 8.1kHz to 133MHz range. Ensure the system voltage is strictly maintained between 4.75V and 5.25V. Consider the 118mil µSOP package dimensions for PCB layout constraints compared to the standard SO package.

Part Context

This component belongs to the DS1077 EconOscillator/Divider series manufactured by Analog Devices / Maxim Integrated. The 'U' designation specifically identifies the µSOP package variant, distinguishing it from the standard SO package ('Z') or other voltage variants like the 3V versions.

Replacement Considerations

Direct replacements must match the 5V supply requirement and 8-pin µSOP footprint. Other models in the DS1077 series (e.g., DS1077Z-100) offer identical functionality but differ in package type. Verify pin compatibility before substitution.

FAQ

What is the function of the CTRL0 and CTRL1 pins?

CTRL0 and CTRL1 are multifunctional input pins that can be configured via control registers to serve as Output Enable or Power-Down controls for the respective outputs.

How are the output frequencies determined?

Frequencies are determined by internal factory-trimmed master oscillators divided by programmable prescalers (P0, P1) and a programmable divider (N), which are set via the 2-wire serial interface.

What is the default behavior upon power-up?

Upon power-up, the device defaults to the frequency values previously stored in its nonvolatile EEPROM memory.