CDCUN1208LPRHBR vs LMK00308SQ/NOPB
| Part Number |
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| Category | Clock/Timing - Clock Buffers, Drivers | Clock/Timing - Clock Buffers, Drivers |
| Manufacturer | Texas Instruments | Texas Instruments |
| Description | IC CLK BUFFER 2:8 400MHZ 32QFN | IC CLK BUFFER 3:9 3.1GHZ 40WQFN |
| Package | Cut Tape (CT) | Cut Tape (CT) |
| Series | - | - |
| Type | Fanout Buffer (Distribution), Divider, Multiplexer | Fanout Buffer (Distribution), Multiplexer, Translator |
| Voltage - Supply | 1.7V ~ 3.63V | 3.15V ~ 3.45V |
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 85°C |
| Mounting Type | Surface Mount | Surface Mount |
| Package / Case | 32-VFQFN Exposed Pad | 40-WFQFN Exposed Pad |
| Supplier Device Package | 32-VQFN (5x5) | 40-WQFN (6x6) |
| Output | HCSL, LVCMOS, LVDS | HCSL, LVCMOS, LVDS, LVPECL |
| Frequency - Max | 400 MHz | 3.1 GHz |
| Number of Circuits | 1 | 1 |
| Input | HCSL, LVCMOS, LVDS | CML, HCSL, HSTL, LVDS, LVPECL, SSTL, Crystal |
| Ratio - Input:Output | 2:8 | 3:9 |
| Differential - Input:Output | Yes/Yes | Yes/Yes |
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1. What is the difference between a clock buffer and a clock driver?
The main function of a clock buffer is to distribute clock signals, while a clock driver is used to enhance signal strength to drive higher loads. Buffer is usually used for branching and synchronizing multiple clock signals, while driver is used to increase signal transmission distance and load capacity.
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2. What is the function of a clock driver?
The function of a clock driver is to enhance the driving capability of the clock signal, ensuring that the signal can be transmitted further or drive more loads without causing signal attenuation or distortion. It is particularly important in high-frequency and high load applications.
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3. How to evaluate the performance of clock drivers?
When evaluating clock drivers, several key parameters need to be considered:
Driving capability (load capacity)
Output signal integrity
Phase noise and jitter
Power noise suppression
Power supply voltage range and power consumption
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4. How do clock buffers and drivers help with timing design?
Clock buffers and drivers ensure that multiple components in the system can work synchronously at precise time points by providing stable, low jitter clock signals, thereby optimizing timing design, especially in high-performance computing and communication systems.
