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DESCRIPTIO
No External Components to Set Frequency
Frequency Error
鹵0.5%
Typical
Fast Start-Up Time: 100碌s Typical
鹵20ppm/擄C
Temperature Stability
Output Enable Provided
Includes Divide by 1, 2 or 4
Rise Time: 0.5ns, C
L
= 5pF
Timing Jitter: <0.8% Typical
50%
鹵2.5%
Duty Cycle
I
S
= 8mA Typical (f
OSC
= 100MHz, C
L
= 5pF)
CMOS Output Drives 600鈩?Load
Single Supply 2.7V to 5.5V
Low Profile (1mm) ThinSOT
TM
Package
The LTC
廬
6905-XXX series of parts are precision, fixed
frequency, silicon oscillators designed to minimize board
space while maximizing accuracy and ease of use.
Programmed at the factory to a fixed frequency, the
LTC6905-XXX series of parts need no external trim com-
ponents. An internal three-state divider allows for division
of the master clock by 1, 2 or 4, providing 3 frequencies
(for each device).
The LTC6905-XXX series operate with a single 2.7V to
5.5V power supply and provide a rail-to-rail, 50% duty
cycle, square wave output. The OE pin will disable the
output when brought low and synchronously enable the
output when brought high, avoiding pulse slivers.
The four products of the LTC6905-XXX family are:
LTC6905-133: f
OSC
= 133MHz, 66.7MHz, 33.3MHz
LTC6905-100: f
OSC
= 100MHz, 50MHz, 25MHz
LTC6905-96: f
OSC
= 96MHz, 48MHz, 24MHz
LTC6905-80: f
OSC
= 80MHz, 40MHz, 20MHz
The LTC6905-XXX series of parts are designed with a factory
trim option to modify the divider ratios from 1, 2, 4 to 8, 16,
32. A second trim option allows for additional master clock
frequencies. For the alternate divider ratios and unlisted
frequencies, contact LTC marketing.
APPLICATIO S
鈻?/div>
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Data Clocks for High Reliability Applications
High Vibration, High Acceleration Environments
Replacement for Fixed Crystal and Ceramic
Oscillators
, LTC and LT are registered trademarks of Linear Technology Corporation.
ThinSOT is a trademark of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
Protected by U.S. Patents, including 6614313, 6342817.
TYPICAL APPLICATIO
Typical Distribution of Frequency Error, T
A
= 25擄C
40
V
S
= 3V
Basic Connection
f
OSC
= 133MHz
UNITS
30
3V
0.1碌F
1
2
3
OUT
V
+
LTC6905-133
GND
OE
DIV
6905x TA01
5
20
3V
梅1
4
梅4
梅2
OPEN
10
0
鈥?
鈥?.5
0.0
0.5
% FREQUENCY ERROR
1
6905x TA02
U
6905xf
U
U
1
1
2
3
4
5
6
7
8
