Description
The 9DB436 is a zero delay/fanout buffer for PCI Express™
clocking. It supports PCIe Gen1–3 in zero delay mode and PCIe
Gen1–4 in fanout mode. The 9DB436 is a pin-compatible upgrade
to the 9DB433 and 9DB434 with a Safe-Power-Sequence (SPS)
clock input.

Features
▪ SPS internal receiver bias network keeps input clock parked
when input is floating
▪ Supports both 85Ω and 100Ω output impedance with
appropriate resistor selection
▪ OE# pins default to controlling outputs
▪ PLL or Bypass mode; PLL can dejitter incoming clock
▪ Selectable PLL bandwidth; minimizes jitter peaking in
downstream PLLs
▪ Spread spectrum compatible
▪ Outputs default to Hi-Z when disabled or when device is
powered down
▪ SMBus interface; unused outputs can be disabled
▪ 3 selectable SMBus addresses