Overview
The LMK05318B, produced by Texas Instruments, is a high-performance network synchronizer clock device designed to meet the stringent timing requirements of communications infrastructure and industrial applications. This device offers jitter cleaning, clock generation, advanced clock monitoring, and superior hitless switching performance. It utilizes Texas Instruments' proprietary Bulk Acoustic Wave (BAW) VCO technology to generate ultra-low jitter clocks, reducing bit error rates (BER) in high-speed serial links.
Key Specifications
| Parameter | Description |
|---|---|
| Manufacturer | Texas Instruments |
| Part Number | LMK05318BRGZT |
| Package | VQFN-48 (7x7) |
| Operating Temperature Range | -40°C to 85°C |
| Supply Voltage | 3.135V to 3.465V |
| Output Frequency (Max) | 800 MHz |
| Input Type | LVCMOS, LVDS, LVPECL, XTAL |
| Output Type | AC-LVDS, AC-CML, AC-LVPECL, HCSL, 1.8-V LVCMOS |
| Number of Clock Outputs | Eight |
| RMS Jitter | 50 fs at 312.5 MHz (APLL1), 125 fs at 155.52 MHz (APLL2) |
| Interface | I2C or SPI |
Key Features
- One Digital Phase-Locked Loop (DPLL) with hitless switching, programmable loop bandwidth, and fastlock capability.
- Two Analog Phase-Locked Loops (APLLs) with industry-leading jitter performance.
- Two reference clock inputs with priority-based input selection and digital holdover on loss of reference.
- Eight programmable clock outputs with various output formats (AC-LVDS, AC-CML, AC-LVPECL, HCSL, and 1.8-V LVCMOS).
- EEPROM/ROM for custom clocks on power-up.
- Flexible configuration options with I2C or SPI interface.
- Advanced clock monitoring and status indicators.
- DCO mode for precise clock steering with < 0.001 ppb/Step (IEEE 1588 PTP Slave).
- High power supply noise rejection (PSNR): –83 dBc.
Applications
The LMK05318B is suitable for various applications requiring high precision and low jitter clock signals, including:
- Communications infrastructure (e.g., 5G, LTE, and Ethernet networks).
- Industrial applications (e.g., automation, control systems, and high-speed data acquisition).
- High-speed serial links and data transmission systems.
- Synchronization and timing in telecommunications and data centers.
Q & A
- What is the primary function of the LMK05318B?
The LMK05318B is a high-performance network synchronizer clock device that provides jitter cleaning, clock generation, advanced clock monitoring, and superior hitless switching performance.
- What is the operating temperature range of the LMK05318B?
The operating temperature range is -40°C to 85°C.
- What are the output formats supported by the LMK05318B?
The device supports AC-LVDS, AC-CML, AC-LVPECL, HCSL, and 1.8-V LVCMOS output formats.
- How many clock outputs does the LMK05318B have?
The device has eight programmable clock outputs.
- What is the maximum output frequency of the LMK05318B?
The maximum output frequency is 800 MHz.
- What is the RMS jitter performance of the APLLs in the LMK05318B?
The RMS jitter is 50 fs at 312.5 MHz (APLL1) and 125 fs at 155.52 MHz (APLL2).
- Does the LMK05318B support I2C and SPI interfaces?
Yes, the device supports both I2C and SPI interfaces.
- What is the power supply voltage range for the LMK05318B?
The supply voltage range is 3.135V to 3.465V.
- Is the LMK05318B RoHS compliant?
Yes, the device is RoHS compliant.
- What are some typical applications for the LMK05318B?
Typical applications include communications infrastructure, industrial automation, high-speed serial links, and data centers.
