Overview
The LMK00334-Q1, produced by Texas Instruments, is a highly versatile and high-performance 4-output clock buffer and level translator. This device is specifically designed for high-frequency, low-jitter clock and data distribution applications. It features a 3:1 input multiplexer, allowing selection from two universal inputs or one crystal input, and distributes the selected clock to two banks of two HCSL outputs and one LVCMOS output. The LMK00334-Q1 is AEC-Q100 qualified for automotive applications, ensuring reliability over a wide temperature range of –40°C to 105°C. It is ideal for use in various high-speed applications, including infotainment systems, autonomous driving controllers, and multi-gigabit Ethernet systems.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Operating Temperature Range | –40°C to 105°C | °C |
| Core Supply Voltage (VCC) | 3.3 V ± 5% | V |
| Output Supply Voltages (VCCO) | 3.3 V ± 5%, 2.5 V ± 5% | V |
| Input Clock Frequency Range | Up to 400 MHz | Hz |
| Crystal Frequency Range | 10 to 40 MHz | Hz |
| Additive RMS Phase Jitter (at 100 MHz) | 30 fs (typical) | fs |
| Power Supply Ripple Rejection (PSRR) at 156.25 MHz | –72 dBc | dBc |
| Package Type | 32-pin WQFN (5 mm × 5 mm) |
Key Features
- AEC-Q100 qualified for automotive applications with a temperature range of –40°C to 105°C.
- 3:1 input multiplexer with two universal inputs (up to 400 MHz) and one crystal input (10-40 MHz).
- Two banks of two differential HCSL outputs and one LVCMOS output with synchronous enable input.
- High PSRR of –72 dBc at 156.25 MHz and low additive RMS phase jitter of 30 fs (typical) at 100 MHz.
- Pin-controlled configuration and three independent VCCO output supplies (3.3 V, 2.5 V ± 5%).
- Support for various clock input types: LVPECL, LVDS, CML, SSTL, HSTL, HCSL, or single-ended clocks.
Applications
- Infotainment systems: telematics, head units.
- Control units: autonomous driving controllers.
- High-speed data distribution: multi-gigabit Ethernet, XAUI, fibre channel, SATA/SAS, SONET/SDH, CPRI, and high-frequency backplanes.
Q & A
- What is the operating temperature range of the LMK00334-Q1?
The operating temperature range is –40°C to 105°C.
- What are the supported input clock types for the LMK00334-Q1?
The device supports LVPECL, LVDS, CML, SSTL, HSTL, HCSL, or single-ended clocks.
- What is the maximum frequency of the universal inputs?
The universal inputs can operate up to 400 MHz.
- What is the range of the crystal input frequency?
The crystal input frequency range is 10 to 40 MHz.
- What is the typical additive RMS phase jitter at 100 MHz?
The typical additive RMS phase jitter at 100 MHz is 30 fs.
- What is the PSRR at 156.25 MHz?
The PSRR at 156.25 MHz is –72 dBc.
- What package type is the LMK00334-Q1 available in?
The device is available in a 32-pin WQFN package (5 mm × 5 mm).
- What are the output supply voltage options?
The output supply voltage options are 3.3 V ± 5% and 2.5 V ± 5%.
- Is the LMK00334-Q1 AEC-Q100 qualified?
Yes, the LMK00334-Q1 is AEC-Q100 qualified for automotive applications.
- What types of outputs does the LMK00334-Q1 provide?
The device provides two banks of two differential HCSL outputs and one LVCMOS output.
