8735BI-01 Datasheet, PDF (1/21 Pages) Integrated Device Technology – Selectable differential input pairs

Low Skew, 1-to-5, Differential-to-3.3V
LVPECL/ECL Fanout Buffer
8735BI-01
DATA SHEET
General Description
The 8735BI-01 is a highly versatile 1:5 Differential- to-3.3V LVPECL
clock generator. The 8735BI-01 has a fully integrated PLL and can be
configured as zero delay buffer, multiplier or divider, and has an
output frequency range of 31.25MHz to 700MHz. The reference
divider, feedback divider and output divider are each programmable,
thereby allowing for the following output-to-input frequency ratios:
8:1, 4:1, 2:1, 1:1, 1:2, 1:4, 1:8. The external feedback allows the
device to achieve “zero delay” between the input clock and the output
clocks. The PLL_SEL pin can be used to bypass the PLL for system
test and debug purposes. In bypass mode, the reference clock is
routed around the PLL and into the internal output dividers.
Block Diagram
Features
• Five differential 3.3V LVPECL output pairs
• Selectable differential input pairs
• CLKx, nCLKx pairs can accept the following differential
input levels: LVPECL, LVDS, LVHSTL, HCSL
• Output frequency range: 31.25MHz to 700MHz
• Input frequency range: 31.25MHz to 700MHz
• VCO range: 250MHz to 700MHz
• External feedback for “zero delay” clock regeneration
with configurable frequencies
• Programmable dividers allow for the following output-to-input
frequency ratios: 8:1, 4:1, 2:1, 1:1, 1:2, 1:4, 1:8
• Static phase offset: 200ps (maximum)
• Cycle-to-cycle jitter: 50ps (maximum)
• Output skew: 55ps (maximum)
• 3.3V output operating supply
• -40°C to 85°C ambient operating temperature
• Lead-free (RoHS 6) packaging
Q0
PLL_SEL ^Pullup
nQ0
Q1
CLK0 ^Pulldown
÷1, ÷2, ÷4, ÷8,
÷16, ÷32, ÷64
0
nQ1
Q2
nCLK0 ^Pullup
0
nQ2
CLK1 ^Pulldown
nCLK1 ^Pullup
1
1
Q3
nQ3
PLL
Q4
CLK_SEL ^Pulldown
nQ4
FB_IN ^Pulldown
nFB_IN ^Pullup
8:1, 4:1, 2:1, 1:1,
1:2, 1:4, 1: 8
SEL0 ^Pulldown
SEL1 ^Pulldown
SEL2 ^Pulldown
SEL3 ^Pulldown
MR ^Pulldown
8735BI-01 REVISION 1 04/02/15
1
©2015 Integrated Device Technology, Inc.