Description
The 9DML4493A is a 4-input, 4-output clock multiplexer. It can
also operate as a dual 2-input, 2-output clock multiplexer. It has
very low additive phase jitter and is suitable for all PCIe data
rates. The device supports today's complex system power
sequencing requirements with Power Down Tolerant and Flexible
Power Sequencing features.

Features
▪ Four differential inputs support LVPECL, LVDS, HCSL or
LVCMOS reference clocks
▪ Flexible Power Sequencing (FPS) ensures good behavior
when powered up without input clock, or when the input clock
is present without power
▪ Power-Down Tolerant (PDT) inputs: CLK_SEL_tri, OE pins,
IOA_tri, IOB_tri, ZOUTSEL may be driven when the 9DML4493
is not powered up
▪ Accepts input frequencies ranging from 1PPS (1Hz) to 350MHz
▪ Configured via pin straps - no serial bus needed
• Pin-selectable 100Ω or 85Ω differential output impedance
• Three pin-selectable output amplitudes per bank
• Pin-selectable 4:4 mode or dual 2:2 MUX modes
▪ Glitch-free output enable pins for each output
▪ Spread-spectrum tolerant
▪ Voltage supply of 1.8V, 2.5V, or 3.3V
▪ -40°C to +85°C ambient operating temperature
▪ 5 × 5 mm 32-VFQFPN package