Overview
The LMK04906BISQ/NOPB, produced by Texas Instruments, is an ultralow noise clock jitter cleaner and multiplier designed for high-performance timing applications. This device features a Dual Loop PLLatinum™ PLL architecture, which includes an integrated low-noise crystal oscillator circuit and a low-noise VCO. It is capable of accepting three clock inputs ranging from 1 kHz to 500 MHz and generating six unique clock output frequencies from 284 kHz to 2.6 GHz. The LMK04906 also supports hitless switching, jitter cleaning, frequency multiplication, and programmable clock distribution, making it a versatile solution for various high-speed communication and data processing systems.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| VCO Frequency Range | 2370 to 2600 | MHz |
| Input Clock Frequency Range | 1 kHz to 500 | MHz |
| Output Clock Frequency Range | 284 kHz to 2.6 | GHz |
| RMS Jitter (12 kHz to 20 MHz) | 100 | fs |
| RMS Jitter (100 Hz to 20 MHz) | 123 | fs |
| Operating Temperature Range | -40 to 85 | °C |
| Supply Voltage Range | 3.15 to 3.45 | V |
| Package Type | 64-Pin WQFN | |
| Package Dimensions | 9 mm × 9 mm × 0.8 mm |
Key Features
- Ultralow RMS jitter performance: 100 fs (12 kHz to 20 MHz) and 123 fs (100 Hz to 20 MHz)
- Dual Loop PLLatinum™ PLL architecture with integrated low-noise crystal oscillator circuit and low-noise VCO
- Three redundant input clocks with automatic and manual switch-over modes
- Programmable outputs: LVPECL, LVDS, or LVCMOS with 50% duty cycle and output divides from 1 to 1045
- Precision digital delay and 25-ps step analog delay control
- Six differential outputs, up to 12 single-ended outputs, and up to 5 VCXO/crystal buffered outputs
- Hitless switching, jitter cleaning, frequency multiplication, and programmable clock distribution
- Multi-mode operation: dual PLL, single PLL, and clock distribution
- 0-delay mode and three default clock outputs at power-up
Applications
- 10G, 40G, and 100G OTN line cards
- SONET/SDH OC-48/STM-16 and OC-192/STM-64 line cards
- GbE/10GbE, 1/2/4/8/10GFC line cards
- ITU G.709 and custom FEC line cards
- Synchronous Ethernet
- Optical modules
- DSLAM/MSANs
- Test and measurement equipment
- Broadcast video systems
- Wireless base stations
- Data converter clocking
- Microwave ODU and IDUs for wireless backhaul
Q & A
- What is the primary function of the LMK04906?
The LMK04906 is an ultralow noise clock jitter cleaner and multiplier designed to clean, generate, and distribute high-quality clock signals.
- What is the range of input clock frequencies for the LMK04906?
The input clock frequency range is from 1 kHz to 500 MHz.
- What types of output signals can the LMK04906 generate?
The LMK04906 can generate LVPECL, LVDS, or LVCMOS output signals.
- What is the RMS jitter performance of the LMK04906?
The RMS jitter performance is 100 fs (12 kHz to 20 MHz) and 123 fs (100 Hz to 20 MHz).
- What is the operating temperature range of the LMK04906?
The operating temperature range is -40°C to 85°C.
- How many programmable outputs does the LMK04906 have?
The LMK04906 has six programmable outputs.
- What is the package type and dimensions of the LMK04906?
The package type is 64-Pin WQFN, and the dimensions are 9 mm × 9 mm × 0.8 mm.
- What are some common applications of the LMK04906?
Common applications include 10G, 40G, and 100G OTN line cards, SONET/SDH line cards, GbE/10GbE line cards, and synchronous Ethernet.
- Does the LMK04906 support hitless switching?
- How is the LMK04906 programmed?
The LMK04906 is programmed through a SPI interface.
