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