TI LMK00338RTAT

The LMK00338 is an 8-output PCIe Gen 1/Gen 2/Gen 3/Gen 4/Gen 5 fanout buffer designed for high-frequency, low-jitter clock and data distribution and level translation. The input clock can be selected from two general-purpose inputs or one crystal oscillator input. The selected input clock is distributed to two banks of HCSL outputs (4 per bank) and 1 LVCMOS output. The LVCMOS output features a synchronous enable input that ensures glitch-free operation when enabled or disabled. The LMK00338 operates from a 3.3V core supply and three independent 3.3V or 2.5V output supplies.

The LMK00338 combines high performance, versatility, and power efficiency, making it an ideal drop-in replacement for fixed-output buffer devices while providing increased timing margin in the system.

• 3:1 input multiplexer
• Two general-purpose inputs operating up to 400MHz, accepting LVPECL, LVDS, CML, SSTL, HSTL, HCSL, or single-ended clocks
• One crystal input accepting 10MHz to 40MHz crystals or single-ended clocks
• Two banks, each with 4 differential outputs – HCSL or Hi-Z (selectable per bank)
• Additive RMS phase jitter for PCIe Gen 5 at 100MHz: 15fs RMS (typical)
• -72 dBc at 156.25MHz
• LVCMOS outputs via synchronous enable input
• Pin-controlled configuration
• VCC core supply: 3.3V ± 5%
• 3 independent VCCO output supplies: 3.3V/2.5V ± 5%
• Industrial temperature range: -40°C to +85°C
• 40-lead WQFN package (6mm x 6mm)

• 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, 4.0, 5.0)
• Remote radio units and baseband units