LTC6905-XXX Series
Fixed Frequency
SOT-23 Oscillator
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DESCRIPTIO
FEATURES
The LTC®6905-XXX series are precision, fixed frequency
siliconoscillatorsdesignedtominimizeboardspacewhile
maximizing accuracy and ease of use.
■
No External Components to Set Frequency
■
Frequency Error: ±0.5% Typical
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Fast Start-Up Time: 100µs Typical
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±20ppm/°C Temperature Stability
Programmed at the factory to a fixed frequency, the
LTC6905-XXX series of parts need no external trim com-
ponents. Aninternalthree-statedividerallowsfordivision
of the master clock by 1, 2 or 4, providing 3 frequencies
(for each device).
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Includes Output Enable
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Includes Frequency Divide by 1, 2 or 4
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Rise Time: 0.5ns, CL = 5pF
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Timing Jitter: <0.8% Typical
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Duty Cycle: 50% ±2.5%
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.
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IS = 8mA Typical (fOSC = 100MHz, CL = 5pF)
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CMOS Output Drives 600Ω Load
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Single Supply 2.7V to 5.5V
Low Profile (1mm) ThinSOTTM Package
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The four products of the LTC6905-XXX family are:
APPLICATIO S
LTC6905-133: fOSC = 133MHz, 66.7MHz, 33.3MHz
LTC6905-100: fOSC = 100MHz, 50MHz, 25MHz
LTC6905-96: fOSC = 96MHz, 48MHz, 24MHz
LTC6905-80: fOSC = 80MHz, 40MHz, 20MHz
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Data Clocks for High Reliability Applications
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High Vibration, High Acceleration Environments
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Replacement for Fixed Crystal and Ceramic
Oscillators
The LTC6905-XXX series of parts provides 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.
, 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.
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TYPICAL APPLICATIO
Typical Distribution of Frequency Error, T = 25°C
A
40
V
S
= 3V
Basic Connection
30
20
10
0
f
= 133MHz
3V
OSC
1
2
3
5
4
+
3V
0.1µF
V
OUT
LTC6905-133
GND
÷1
÷2
OE
DIV
OPEN
÷4
6905x TA01
–1
–0.5
0.0
0.5
1
6905x TA02
% FREQUENCY ERROR
6905xfa
1