LTC6905-XXX Series
Fixed Frequency
SOT-23 Oscillator
DESCRIPTIO
FEATURES
The LTC 6905-XXX series are precision, fixed frequency
No External Components to Set Frequency
silicon oscillators designed to minimize board space while
Frequency Error: 0.5% Typical
maximizing accuracy and ease of use.
Fast Start-Up Time: 100s Typical
20ppm/C Temperature Stability
Programmed at the factory to a fixed frequency, the
Includes Output Enable
LTC6905-XXX series of parts need no external trim com-
Includes Frequency Divide by 1, 2 or 4
ponents. An internal three-state divider allows for division
Rise Time: 0.5ns, C = 5pF
L
of the master clock by 1, 2 or 4, providing 3 frequencies
Timing Jitter: <0.8% Typical
(for each device).
Duty Cycle: 50% 2.5%
The LTC6905-XXX series operate with a single 2.7V to
I = 8mA Typical (f = 100MHz, C = 5pF)
S OSC L
5.5V power supply and provide a rail-to-rail, 50% duty
CMOS Output Drives 600 Load
cycle, square wave output. The OE pin will disable the
Single Supply 2.7V to 5.5V
TM
output when brought low and synchronously enable the
Low Profile (1mm) ThinSOT Package
output when brought high, avoiding pulse slivers.
U
The four products of the LTC6905-XXX family are:
APPLICATIO S
LTC6905-133: f = 133MHz, 66.7MHz, 33.3MHz
OSC
Data Clocks for High Reliability Applications
LTC6905-100: f = 100MHz, 50MHz, 25MHz
OSC
High Vibration, High Acceleration Environments
LTC6905-96: f = 96MHz, 48MHz, 24MHz
OSC
Replacement for Fixed Crystal and Ceramic
LTC6905-80: f = 80MHz, 40MHz, 20MHz
OSC
Oscillators
The LTC6905-XXX series of parts provides a factory trim
, LTC and LT are registered trademarks of Linear Technology Corporation.
ThinSOT is a trademark of Linear Technology Corporation.
option to modify the divider ratios from 1, 2, 4 to 8, 16, 32.
All other trademarks are the property of their respective owners.
Protected by U.S. Patents, including 6614313, 6342817.
A second trim option allows for additional master clock
frequencies. For the alternate divider ratios and unlisted
frequencies, contact LTC marketing.
TYPICAL APPLICATIO
Typical Distribution of Frequency Error, T = 25C
A
40
V = 3V
S
Basic Connection
30
f = 133MHz
OSC
1 5
+
3V
V OUT
LTC6905-133 20
0.1F
2
3V
GND
1
3 4
2
OE DIV OPEN
10
4
6905x TA01
0
1 0.5 0.0 0.5 1
% FREQUENCY ERROR 6905x TA02
6905xfa
1
UNITS
U
ULTC6905-XXX Series
UUW
ABSOLUTE AXI U RATI GS PACKAGE/ORDER I FOR ATIO
(Note 1)
+ TOP VIEW
Supply Voltage (V ) to GND ........................0.3V to 6V
+ +
V 1 5 OUT
DIV to GND .................................... 0.3V to (V + 0.3V)
+
GND 2
OE to GND ..................................... 0.3V to (V + 0.3V)
OE 3 4 DIV
Output Short-Circuit Duration (Note 6) ........... Indefinite
S5 PACKAGE
Operating Temperature Range (Note 8)
5-LEAD PLASTIC SOT-23
LTC6905C .......................................... 40C to 85C
T = 125C, = 150C/W
JMAX JA
LTC6905I............................................ 40C to 85C
ORDER PART NUMBER
S5 PART MARKING*
LTC6905H ........................................ 40C to 125C
Specified Temperature Range (Note 8)
LTC6905CS5-133 LTBPM
LTC6905C ............................................... 0C to 70C
LTC6905IS5-133 LTBPM
LTC6905I............................................ 40C to 85C
LTC6905HS5-133 LTBPM
LTC6905H ........................................ 40C to 125C
LTC6905CS5-100 LTBPK
Storage Temperature Range ................. 65C to 150C
LTC6905IS5-100
LTBPK
Lead Temperature (Soldering, 10 sec).................. 300C
LTC6905HS5-100 LTBPK
LTC6905CS5-96
LTBPJ
LTC6905IS5-96 LTBPJ
LTC6905HS5-96 LTBPJ
LTBPH
LTC6905CS5-80
LTBPH
LTC6905IS5-80
LTBPH
LTC6905HS5-80
Order Options Tape and Reel: Add #TR
Lead Free: Add #PBF Lead Free Tape and Reel: Add #TRPBF
Lead Free Part Marking: