8INT31H800A Datasheet, PDF (1/17 Pages) Integrated Device Technology – Universal differential input

8-Output Very Low Phase Jitter
HCSL Fanout Buffer
8INT31H800A
DATA SHEET
General Description
The 8INT31H800A is an 8-output very high performance HCSL
fanout buffer for High Performance Interconnect applications. It can
also be used at speeds up to 350MHz. There are four OE pins on the
device, each controlling two outputs.
Recommended Application
DB800H
Output Features
• Eight HCSL differential pairs
Key Specifications
• Qx output-to-output skew within a pair: 22ps (typical)
• Qx output-to-output skew across all outputs: 32ps (typical)
• RMS additive phase jitter: 65fs (typical)
Features/Benefits
• Extremely low additive phase jitter; supports DB800H
requirements
• 3.3V operation; standard industry power supply
• Four OE pins each controlling two outputs; easy control of clocks
to CPU sockets
• Universal differential input; can be driven by HCSL or LVPECL
clock sources
• 1MHz to 350MHz operating frequency; covers all popular Ethernet
frequencies
• Space saving 32-pin 5x5mm VFQFN; minimal board space
Block Diagram
vOE_01#
vOE_23#
nCLK_IN
CLK_IN
vOE_45#
vOE_67#
Pin Assignment
Q(0:1)
Q(2:3)
Q(4:5)
Q(6:7)
32 31 30 29 28 27 26 25
Q0 ¹
24 _Q4
nQ0 ²
23 _nQ4
Q1 3
22 _Q5
nQ1 ⁴
Q2 ⁵
8INT31H800A
21 _nQ5
20 _Q6
nQ2 ⁶
19 nQ6
Q3 ⁷
18 _Q7
nQ3
8
9
17
10 11 12 13 14 15 16
nQ7
32-pin, 5mm x 5mm VFQFN Package
v prefix indicates internal 50kΩ pull-down resistor
8INT31H800A REVISION 2 12/09/14
1
©2014 Integrated Device Technology, Inc.