
Allicdata Part #: | PL685-P8-108OC-R-ND |
Manufacturer Part#: |
PL685-P8-108OC-R |
Price: | $ 0.00 |
Product Category: | Integrated Circuits (ICs) |
Manufacturer: | Microchip Technology |
Short Description: | IC CLK BUFFER LVPECL 16TSSOP |
More Detail: | N/A |
DataSheet: | ![]() |
Quantity: | 1000 |
1 +: | 0.00000 |
Differential - Input:Output: | No/No |
Base Part Number: | PL685 |
Supplier Device Package: | 16-TSSOP |
Package / Case: | 16-TSSOP (0.173", 4.40mm Width) |
Mounting Type: | Surface Mount |
Operating Temperature: | 0°C ~ 70°C |
Voltage - Supply: | 2.97 V ~ 3.63 V |
Divider/Multiplier: | Yes/Yes |
Frequency - Max: | 400MHz |
Series: | -- |
Ratio - Input:Output: | 1:2 |
Number of Circuits: | 1 |
Output: | PECL |
Input: | LVPECL, Crystal |
PLL: | Yes with Bypass |
Part Status: | Discontinued at Digi-Key |
Packaging: | Tape & Reel (TR) |
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Clock/Timing - Clock Generators, PLLs, Frequency Synthesizers
The PL685-P8-108OC-R clock generator is a high speed, wide range, multifunction, phase locked loop (PLL) frequency synthesizer specifically designed for communications markets in both software and hardware. This all-in-one device consists of VCXO, VCO, clock multiplier, phase detector, frequency divider, filter and configuration registers. It offers an unprecedented operating range of 0.2MHz to 108MHz with a fully integrated design.
Application Field
The PL685-P8-108OC-R clock generator is suitable for many communication products. Its wide operating range and multi-function design make the device suitable for various digital modems, routers, networking, mobile communication systems, 3G/4G/5G, Ethernet backbone devices, VoIP phones and media servers. The clock generator’s ability to power down redundant frequencies minimizes static and dynamic power consumption, making it a great choice for energy-sensitive designs.
Working Principle
The PL685-P8-108OC-R uses a Phase-Locked Loop (PLL) to accurately generate the required reference clock frequencies by multiplying the reference oscillator input frequency. The device has an on-chip Voltage Controlled Oscillator (VCO) capable of producing frequencies in the range of 0.2MHz to 108MHz. The output frequency is determined by the programming code locked in the Configuration Registers. The device has an internal prescaler to divide the output frequency. The frequency range of the output clock is accurately set by varying the reference clock frequency and the prescaler.
The device also has an Adjust Clock output with a maximum frequency of 22MHz. The Adjust Clock output can be used as a reference clock for Spread Spectrum applications or for spreading data transmission clock frequencies. The PL685-P8-108OC-R has an on-chip Charge Pump that can control the reference frequency range. The Charge Pump is also used for setting the modulation rates for frequency spreading.
The PL685-P8-108OC-R also has an on-chip power management feature for controlling power consumption. The clock generator can be put into reduced power state or a combination of reduced power states when not operating at its full frequency capacity. This feature helps reduce over current and power consumption.
Conclusion
The PL685-P8-108OC-R is a wide-range, multi-function, phase-locked loop (PLL) frequency synthesizer that can input reference frequencies of 0.2 MHz to 108MHz and output a clock frequency range of 0.2MHz to 108MHz. The device is commonly employed in many communication devices, such as digital modems, routers, networking, mobile communication systems, 3G/4G/5G, Ethernet backbone devices, VoIP phones and media servers. With the integrated power management feature, the device is an ideal and energy-efficient choice for communication systems.
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