General Description
The 83940I-01 is a low skew, 1-to-18 LVPECL-to-LVCMOS/ LVTTL
Fanout Buffer. The 83940I-01 has two selectable clock inputs. The
PCLK, nPCLK pair can accept LVPECL or SSTL input levels. The
single-ended clock input accepts LVCMOS or LVTTL input levels.
The 83940I-01 is characterized at full 3.3V, full 2.5V and mixed 3.3V
input and 2.5V output operating supply modes. Guaranteed output
and part-to-part skew characteristics make the 83940I-01 ideal for
those clock distribution applications demanding well defined
performance and repeatability.
Features
• Eighteen LVCMOS/LVTTL outputs, 23 typical output impedance
• Selectable LVCMOS_CLK or LVPECL clock inputs
• PCLK, nPCLK pair can accept the following differential input
levels: LVPECL, SSTL
• LVCMOS_CLK supports the following input types: LVCMOS or
LVTTL
• Maximum output frequency: 175MHz
• Additive phase jitter, RMS: 0.108ps (typical), 3.3V/3.3V
• Output skew: 115ps (maximum)
• Part-to-part skew: 800ps (maximum), 3.3V/3.3V
• Operating supply modes:
• Core/Output
3.3V/3.3V
3.3V/2.5V
2.5V/2.5V
• -40°C to 85°C ambient operating temperature
• Available in lead-free (RoHS 6) package