LTC6905-XXX Datasheet, PDF (1/8 Pages) Linear Technology – Fixed Frequency SOT-23 Oscillator

FEATURES
■ _{No External Components to Set Frequency}
■ _{Frequency Error ±0.5% Typical}
■ _{Fast Start-Up Time: 100µs Typical}
■ _{±20ppm/°C Temperature Stability}
■ _{Output Enable Provided}
■ _{Includes Divide by 1, 2 or 4}
■ _{Rise Time: 0.5ns, CL = 5pF}
■ _{Timing Jitter: <0.8% Typical}
■ _{50% ±2.5% Duty Cycle}
■ _{IS = 8mA Typical (fOSC = 100MHz, CL = 5pF)}
■ _{CMOS Output Drives 600Ω Load}
■ _{Single Supply 2.7V to 5.5V}
■ _{Low Profile (1mm) ThinSOT}^TM _Package
U
APPLICATIO S
■ _{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
3V
0.1µF
Basic Connection
f_OSC = 133MHz
1 _V+
5
OUT
LTC6905-133
2
GND
3
OE
4
DIV
3V
÷1
÷2
OPEN
6905x TA01
÷4
LTC6905-XXX Series
Fixed Frequency
SOT-23 Oscillator
DESCRIPTIO
The LTC^®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.
Typical Distribution of Frequency Error, T_A = 25°C
40
V_S = 3V
30
20
10
0
–1
–0.5
0.0
0.5
1
% FREQUENCY ERROR 6905x TA02
6905xf
1