Frequency Oscillator. LTC6995-2 Datasheet

LTC6995-2 Oscillator. Datasheet pdf. Equivalent

Part LTC6995-2
Description Low Frequency Oscillator
Feature Features n Period Range: 1ms to 9.5 Hours n Timing Reset by Power-On or Reset Input n Configured .
Manufacture Linear
Datasheet
Download LTC6995-2 Datasheet

Features n Period Range: 1ms to 9.5 Hours n Timing Reset b LTC6995-2 Datasheet
Recommendation Recommendation Datasheet LTC6995-2 Datasheet





LTC6995-2
Features
n Period Range: 1ms to 9.5 Hours
n Timing Reset by Power-On or Reset Input
n Configured with 1 to 3 Resistors
n <1.5% Maximum Frequency Error
n Programmable Output Polarity
n 2.25V to 5.5V Single Supply Operation
n 55µA to 80µA Supply Current
(2ms to 9.5hr Clock Period)
n 500µs Start-Up Time
n CMOS Output Driver Sources/Sinks 20mA
n –55°C to 125°C Operating Temperature Range
n Available in Low Profile (1mm) SOT-23 (ThinSOT™)
and 2mm × 3mm DFN Packages
Applications
n Power-On Reset Timer
n Long Time One Shot
n “Heartbeat” Timers
n Watchdog Timers
n Periodic “Wake-Up” Call
n High Vibration, High Acceleration Environments
L, LT, LTC, LTM, Linear Technology, TimerBlox and the Linear logo are registered trademarks
and ThinSOT is a trademark of Linear Technology Corporation. All other trademarks are the
property of their respective owners.
LTC6995-1/LTC6995-2
TimerBlox: Long Timer, Low
Frequency Oscillator
Description
The LTC®6995 is a silicon oscillator with a programmable
period range of 1.024ms to 9.54 hours (29.1µHz to 977Hz),
specifically intended for long duration timing events. The
LTC6995 is part of the TimerBlox® family of versatile
silicon timing devices.
A single resistor, RSET , programs the LTC6995’s internal
master oscillator frequency. The output clock period
is determined by this master oscillator and an internal
frequency divider,
from 1 to 221.
NDIV ,
programmable
to
eight
settings
tOUT
=
NDIV •RSET
50k
• 1.024ms,
NDIV
= 1,8,64,...,221
When oscillating, the LTC6995 generates a 50% duty
cycle square wave output. A reset function is provided
to stop the master oscillator and clear internal dividers.
Removing reset initiates a full output clock cycle which is
useful for programmable power-on reset and watchdog
timer applications.
The LTC6995 has two versions of reset functionality. The
reset input is active high for the LTC6995-1 and active low
for the LTC6995-2. The polarity of the output when reset
is selectable for both versions.
RST/RST
0
1
0
1
POLARITY
0
0
1
1
OUTPUT (OSCILLATOR START STATE)
LTC6995-1
LTC6995-2
Oscillating (Low)
0 (Reset)
0 (Reset)
Oscillating (Low)
Oscillating (High)
1 (Reset)
1 (Reset)
Oscillating (High)
Typical Application
Active Low Power-On Reset Timer
RST OUT
LTC6995-1
GND V+
SET
118k
DIV
V+
V+
1M 0.1µF
OUT
392k
5 SECONDS
1/2 tOUT
POWER-ON RESET
(1ms TO 4.8 HOURS)
TIMER STOPPED
699512 TA01
For more information www.linear.com/LTC6995-1
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LTC6995-2
LTC6995-1/LTC6995-2
Absolute Maximum Ratings (Note 1)
Supply Voltage (V+) to GND.........................................6V
Maximum Voltage
on Any Pin................. (GND – 0.3V) ≤ VPIN ≤ (V+ + 0.3V)
Operating Temperature Range (Note 2)
LTC6995C.............................................–40°C to 85°C
LTC6995I..............................................–40°C to 85°C
LTC6995H........................................... –40°C to 125°C
LTC6995MP........................................ –55°C to 125°C
Specified Temperature Range (Note 3)
LTC6995C................................................. 0°C to 70°C
LTC6995I..............................................–40°C to 85°C
LTC6995H........................................... –40°C to 125°C
LTC6995MP........................................ –55°C to 125°C
Junction Temperature............................................ 150°C
Storage Temperature Range................... –65°C to 150°C
Lead Temperature (Soldering, 10 sec)
S6 Package............................................................ 300°C
Pin Configuration
LTC6995-1/LTC6995-2
V+ 1
DIV 2
SET 3
TOP VIEW
7
GND
6 OUT
5 GND
4 RST/RST
DCB PACKAGE
6-LEAD (2mm × 3mm) PLASTIC DFN
TJMAX = 150°C, θJA = 64°C/W, θJC = 9.6°C/W
EXPOSED PAD (PIN 7) CONNECTED TO GND,
PCB CONNECTION OPTIONAL
LTC6995-1/LTC6995-2
RST/RST 1
GND 2
SET 3
TOP VIEW
6 OUT
5 V+
4 DIV
S6 PACKAGE
6-LEAD PLASTIC TSOT-23
TJMAX = 150°C, θJA = 192°C/W, θJC = 51°C/W
Order Information
Lead Free Finish
TAPE AND REEL (MINI) TAPE AND REEL
PART MARKING* PACKAGE DESCRIPTION
LTC6995CDCB-1#TRMPBF LTC6995CDCB-1#TRPBF LGJM
6-Lead (2mm × 3mm) Plastic DFN
LTC6995IDCB-1#TRMPBF LTC6995IDCB-1#TRPBF LGJM
6-Lead (2mm × 3mm) Plastic DFN
LTC6995HDCB-1#TRMPBF LTC6995HDCB-1#TRPBF LGJM
6-Lead (2mm × 3mm) Plastic DFN
LTC6995CDCB-2#TRMPBF LTC6995CDCB-2#TRPBF LGJP
6-Lead (2mm × 3mm) Plastic DFN
LTC6995IDCB-2#TRMPBF LTC6995IDCB-2#TRPBF LGJP
6-Lead (2mm × 3mm) Plastic DFN
LTC6995HDCB-2#TRMPBF LTC6995HDCB-2#TRPBF LGJP
6-Lead (2mm × 3mm) Plastic DFN
LTC6995CS6-1#TRMPBF LTC6995CS6-1#TRPBF LTGJN
6-Lead Plastic TSOT-23
LTC6995IS6-1#TRMPBF LTC6995IS6-1#TRPBF LTGJN
6-Lead Plastic TSOT-23
LTC6995HS6-1#TRMPBF LTC6995HS6-1#TRPBF LTGJN
6-Lead Plastic TSOT-23
LTC6995MPS6-1#TRMPBF LTC6995MPS6-1#TRPBF LTGJN
6-Lead Plastic TSOT-23
LTC6995CS6-2#TRMPBF LTC6995CS6-2#TRPBF LTGJQ
6-Lead Plastic TSOT-23
LTC6995IS6-2#TRMPBF LTC6995IS6-2#TRPBF LTGJQ
6-Lead Plastic TSOT-23
LTC6995HS6-2#TRMPBF LTC6995HS6-2#TRPBF LTGJQ
6-Lead Plastic TSOT-23
LTC6995MPS6-2#TRMPBF LTC6995MPS6-2#TRPBF LTGJQ
6-Lead Plastic TSOT-23
TRM = 500 pieces. *Temperature grades are identified by a label on the shipping container.
Consult LTC Marketing for parts specified with wider operating temperature ranges.
Consult LTC Marketing for information on lead based finish parts.
For more information on lead free part marking, go to: http://www.linear.com/leadfree/
For more information on tape and reel specifications, go to: http://www.linear.com/tapeandreel/
2 For more information www.linear.com/LTC6995-1
SPECIFIED TEMPERATURE RANGE
0°C to 70°C
–40°C to 85°C
–40°C to 125°C
0°C to 70°C
–40°C to 85°C
–40°C to 125°C
0°C to 70°C
–40°C to 85°C
–40°C to 125°C
–55°C to 125°C
0°C to 70°C
–40°C to 85°C
–40°C to 125°C
–55°C to 125°C
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