LMK00304SQX/NOPB

The LMK00304 is a 3GHz, 4-channel output differential fanout buffer designed for high-frequency, low-jitter clock/data distribution and level conversion. It can select the input clock from two general-purpose inputs or one crystal oscillator input. The selected input clock is distributed to two output groups, with each group containing 2 differential outputs and 1 LVCMOS output. The two differential output groups can be configured together as LVPECL, LVDS, or HCSL drivers, or be disabled. The LVCMOS output has a synchronous enable input, enabling glitch-free operation after being enabled or disabled. The LMK00304 operates with a 3.3V core power supply and 3 independent 3.3V/2.5V output power supplies. The LMK00304 features high performance, versatility, and power efficiency, making it an ideal choice to replace fixed-output buffer devices while increasing the timing margin in the system.

Applications

• Clock distribution and level translation for ADC, DAC, multi-gigabit Ethernet, XAUI, Fibre Channel, SATA/SAS, SONET/SDH, CPRI, and high-frequency backplanes
• Switches, routers, line interface cards, timing cards
• Servers, computing, PCI Express (PCIe 3.0)
• Remote radio units and baseband units

Key features

• 3:1 input multiplexer
• Two general-purpose inputs operating up to 3.1GHz, accepting LVPECL, LVDS, CML, SSTL, HSTL, HCSL, or single-ended clock signal levels
• One crystal input accepting 10MHz to 40MHz crystal or single-ended clock
• Two banks, each with 2 differential outputs
• LVPECL, LVDS, HCSL, or Hi-Z (selectable)
• LMK03806 clock source at 156.25MHz, LVPECL additive jitter: 20fs RMS (10kHz to 1MHz), 51fs RMS (12kHz to 20MHz)
• High PSRR: -65/-76dBc (LVPECL/LVDS) at 156.25MHz
• LVCMOS output with synchronous enable input
• Pin-controlled configuration
• VCC core supply: 3.3V±5%