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Product Detailed Parameters
- Description：IC CLOCK GENERATOR 8UMAX
- Series：EconOscillator™
- Package：Tube
- Mfr：Analog Devices Inc./Maxim Integrated
- PLL：No
- Input：Clock
- Output：Clock
- Number of Circuits：1
- Ratio - Input:Output：2:01
- Differential - Input:Output：No/No
- Frequency - Max：14.7456MHz
- Divider/Multiplier：Yes/No
- Voltage - Supply：2.7V ~ 3.6V
- Operating Temperature：-40°C ~ 85°C
- Mounting Type：Surface Mount
- Package / Case：8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Supplier Device Package：8-uMAX/uSOP
- Type：Clock Generator
- Grade：-
- Qualification：-
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Overview
The DS1087LU-11G+ is a factory-programmed, spread-spectrum clock generator from the EconOscillator family. It produces a dithered square-wave output ranging from 130kHz to 66.6MHz without external timing components. The device operates on a 2.7V to 3.6V supply and features a 2-wire serial interface for user programmability of the internal frequency divider and dither settings (2% or 4%). Configuration data is stored in non-volatile EEPROM, enabling standalone operation. Key control features include glitchless output-enable and power-down modes.
Feature Summary
- Factory programmed square-wave generator with frequencies up to 66.6MHz
- Spread-spectrum capability with selectable 2% or 4% dither for EMI reduction
- Non-volatile EEPROM storage for standalone configuration retention
- Glitchless output-enable and power-down control pins
Applications
- Printers
- Copiers
- PCs
- Computer Peripherals
- Cell Phones
Procurement Notes
Verify component authenticity through authorized distribution channels. Confirm RoHS compliance status as indicated by the datasheet documentation. Ensure proper handling procedures are followed during assembly to maintain device reliability.
Selection Notes
Select this component when a fixed-frequency, low-component-count clock source is required. The integrated spread-spectrum feature aids in meeting electromagnetic compatibility standards. Verify that the specific master oscillator frequency matches the system requirements before ordering.
Part Context
This part belongs to the DS1087L series of 3.3V spread-spectrum oscillators. The 'LU' suffix indicates an industrial temperature range (-40°C to +85°C) and the µSOP package. The '+11G' suffix denotes lead-free packaging compliant with environmental directives.
Replacement Considerations
Direct replacements within the same series include DS1087LU-216 (16.6MHz, 2% dither) or DS1087LU-466 (66.6MHz, 4% dither). Ensure the replacement part has the correct factory-programmed frequency and dither percentage for the target application.
FAQ
How is the dither function enabled?
The dither function is enabled by pulling the SPRD pin high. It can also be controlled via the J0 bit in the PRESCALER register.
What is the purpose of the OE pin?
The OE (Output Enable) pin gates the clock output buffer. When low, the output is disabled, but the internal master oscillator continues to run.
Can the device operate without a microprocessor?
Yes, the DS1087L supports stand-alone mode. Settings are stored in non-volatile EEPROM, allowing it to generate the clock signal independently after power-up.
