83918 Datasheet, PDF (1/19 Pages) Integrated Device Technology – Maximum output frequency

Low Skew, 1:18
Crystal-to-LVCMOS/LVTTL Fanout Buffer
83918
DATA SHEET
General Description
The 83918 is a low skew, 1:18 Crystal-to- LVCMOS/LVTTL Fanout
Buffer. The 83918 has selectable LVCMOS/LVTTL clock or crystal
inputs. The low impedance LVCMOS/LVTTL outputs are designed to
drive 50 series or parallel terminated transmission lines.
The 83918 is characterized at full 3.3V, full 2.5V and mixed
3.3V/2.5V, 3.3V/1.8V, and 2.5V/1.8V output operating supply modes.
Guaranteed output and part-to-part skew characteristics make the
83918 ideal for those clock distribution applications demanding well
defined performance and repeatability.
Features
• Eighteen LVCMOS/LVTTL output
• Selectable crystal oscillator interface or LVCMOS_CLK
• Maximum output frequency: 200MHz
• Crystal input frequency range: 10MHz to 40MHz
• RMS phase jitter using a 25MHz crystal (1kHz – 1MHz): 0.449ps
(typical) @ 3.3V/3.3V
• Output skew: 75ps (maximum) @ 3.3V/3.3V
• Operating supply modes:
Core/Output
3.3V/3.3V
3.3V/2.5V
3.3V/1.8V
2.5V/2.5V
2.5V/1.8V
• -40°C to 85°C ambient operating temperature
• Available in lead-free (RoHS 6) package
Block Diagram
CLK_SEL ^Pulldown
XTAL_IN
OSC
0
XTAL_OUT
LVCMOS_CLK ^Pulldown
1
18
Q0:Q17
Pin Assignment
GND
GND
LVCMOS_CLK
CLK_SEL
XTAL_IN
XTAL_OUT
VDD
VDDO
32 31 30 29 28 27 26 25
1
24
2
23
3
22
4
21
5
20
6
19
7
18
8
17
9 10 11 12 13 14 15 16
Q6
Q7
Q8
VDDO
Q9
Q10
Q11
GND
83918
32 Lead LQFP
7mm x 7mm x 1.4mm package body
Y Package
Top View
83918 Rev B 3/25/15
1
©2015 Integrated Device Technology, Inc.