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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：33.3MHz
- 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-23C+ is a factory-programmed, spread-spectrum clock generator from the EconOscillator family. It produces a square-wave output with frequencies ranging from 130kHz to 66.6MHz and supports selectable 2% or 4% dithering for EMI reduction. The device operates on a 2.7V to 3.6V supply and features a 2-wire serial interface for user programmability via an internal prescaler. All settings are stored in nonvolatile EEPROM, enabling standalone operation without external timing components.
Feature Summary
- Factory programmed square-wave generator with frequencies up to 66.6MHz
- Spread-spectrum capability with 2% or 4% selectable dithered output
- User programmable down to 130kHz using an internal frequency divider
- Nonvolatile EEPROM storage for settings and 2-wire serial interface
Applications
- Printers
- Copiers
- PCs
- Computer Peripherals
- Cell Phones
Procurement Notes
Verify component authenticity through authorized Analog Devices or Maxim Integrated distributors. Confirm the specific ordering suffix matches the required package and temperature range specifications. Check current availability status as inventory levels may vary across different supply channels.
Selection Notes
Select this model when a fixed-frequency, low-component-count clock source is required. Ensure the application voltage stays within the 2.7V to 3.6V range. Verify that the factory-programmed frequency meets system requirements, as the base oscillator cannot be changed after manufacturing.
Part Context
This component belongs to the DS1087L series of 3.3V Spread-Spectrum EconOscillators. The 'LU' designation indicates the -40°C to +85°C industrial temperature range and the µSOP package. The '+' suffix typically denotes compliance with environmental standards such as RoHS.
Replacement Considerations
Compatible substitutes include other DS1087LU variants with matching frequencies and dither percentages, such as DS1087LU-216 or DS1087LU-466. Cross-referencing datasheets is necessary to confirm pin compatibility and electrical characteristics before substitution.
FAQ
How is the dither function controlled?
Dither is enabled by pulling the SPRD pin high. The amount of dither (2% or 4%) is selected via the J0 bit in the PRESCALER register.
Can the output frequency be adjusted after programming?
Yes, the internal prescaler allows the master oscillator frequency to be divided by powers of two, enabling adjustment down to 130kHz via the 2-wire interface.
What happens to the SDA and SCL pins in stand-alone mode?
These pins must not be left floating. If in-circuit programming is not needed, they can be wired directly high to VCC.
