GENERAL DESCRIPTION

The ICS83940I-01 is a low skew, 1-to-18 LVPECL-to-LVCMOS/LVTTL Fanout Buffer and a member of the HiPerClockS™ family of High Performance Clock Solutions from ICS. The ICS83940I-01 has two selectable clock inputs. The PCLK, nPCLK pair can accept LVPECL, CML or SSTL input levels. The single ended clock input accepts LVCMOS or LVTTL input levels. The low impedance LVCMOS/LVTTL outputs are designed to drive 50Ω series or parallel terminated transmission lines. The effective fanout can be increased from 18 to 36 by utilizing the ability of the outputs to drive two series terminated lines.

FEATURES

• 18 LVCMOS/LVTTL outputs, 23Ω typical output impedance

• Selectable LVCMOS_CLK or LVPECL clock inputs

• LVCMOS_CLK supports the following input types: LVCMOS or LVTTL

• PCLK, nPCLK supports the following input types: LVPECL, CML, SSTL

• Maximum output frequency: 250MHz

• Output skew: 150ps (maximum)

• Part-to-part skew: 750ps (maximum)

• Full 3.3V, 2.5V or mixed 3.3V, 2.5V supply modes

• -40°C to 85°C ambient operating temperature

• Pin compatible with the MPC940L in single supply applications