Fanout buffer with 2:18 clock distribution
The CY29940AC-1 is a low-skew clock driver from Infineon, a fanout buffer that takes up to two input clock signals (LVCMOS, LVPECL, or LVTTL) and distributes them to 18 outputs — a 2:18 ratio that covers multi-drop clock trees in networking or telecom line cards. Rated up to 200 MHz, it handles common base-station or switch fabric clocks without reclocking. One input can be differential (the other is single-ended), giving flexibility for mixed-signal boards where a clean LVPECL source feeds the distribution.
Supply rails and temperature grade
No exposed thermal pad — junction-to-ambient thermal performance follows the JEDEC JESD51-7 board profile.
Compliance and sourcing reality
Marked as RoHS non-compliant — the lead-free exemption does not apply. This limits its use on lines requiring full RoHS-10 compliance unless a waiver is in place.