LTC6995-1/LTC6995-2
TimerBlox: Long Timer, Low
Frequency Oscillator
Fea T Descrip T
n
Period Range: 1ms to 9.5 Hours
The LTC 6995 is a silicon oscillator with a programmable
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Timing Reset by Power-On or Reset Input
period range of 1.024ms to 9.54 hours (29.1Hz to 977Hz),
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Configured with 1 to 3 Resistors
specifically intended for long duration timing events. The
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<1.5% Maximum Frequency Error LTC6995 is part of the TimerBlox family of versatile
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Programmable Output Polarity silicon timing devices.
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2.25V to 5.5V Single Supply Operation
A single resistor, R , programs the LTC6995s internal
SET
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55A to 80A Supply Current
master oscillator frequency. The output clock period
(2ms to 9.5hr Clock Period)
is determined by this master oscillator and an internal
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500s Start-Up Time
frequency divider, N , programmable to eight settings
DIV
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CMOS Output Driver Sources/Sinks 20mA
21
from 1 to 2 .
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55C to 125C Operating Temperature Range
N R
n
21
Available in Low Profile (1mm) SOT-23 (ThinSOT) DIV SET
t = 1.024ms, N = 1,8,64,...,2
OUT DIV
and 2mm 3mm DFN Packages 50k
When oscillating, the LTC6995 generates a 50% duty
a T
cycle square wave output. A reset function is provided
to stop the master oscillator and clear internal dividers.
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Power-On Reset Timer
Removing reset initiates a full output clock cycle which is
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Long Time One Shot
useful for programmable power-on reset and watchdog
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Heartbeat Timers
timer applications.
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Watchdog Timers
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Periodic Wake-Up Call
The LTC6995 has two versions of reset functionality. The
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High Vibration, High Acceleration Environments
reset input is active high for the LTC6995-1 and active low
L, LT, LTC, LTM, Linear Technology, TimerBlox and the Linear logo are registered trademarks for the LTC6995-2. The polarity of the output when reset
and ThinSOT is a trademark of Linear Technology Corporation. All other trademarks are the
is selectable for both versions.
property of their respective owners.
OUTPUT (OSCILLATOR START STATE)
RST/RST POLARITY LTC6995-1 LTC6995-2
0 0 Oscillating (Low) 0 (Reset)
1 0 0 (Reset) Oscillating (Low)
0 1 Oscillating (High) 1 (Reset)
1 1 1 (Reset) Oscillating (High)
Typical a T
Active Low Power-On Reset Timer
RST OUT +
V
LTC6995-1
+ +
GND V V
5 SECONDS
0.1F
OUT
1M TIMER STOPPED
1/2 t
OUT
SET DIV
POWER-ON RESET
118k
(1ms TO 4.8 HOURS)
392k
699512 TA01
699512fa
1
For more information www.linear.com/LTC6995-1
ion pplica
ions pplica
ion uresLTC6995-1/LTC6995-2
a T e Maxi Mu M r a T (Note 1)
+
Supply Voltage (V ) to GND ........................................6V Specified Temperature Range (Note 3)
Maximum Voltage LTC6995C ................................................ 0C to 70C
+
on Any Pin ................ (GND 0.3V) V (V + 0.3V) LTC6995I .............................................40C to 85C
PIN
Operating Temperature Range (Note 2) LTC6995H .......................................... 40C to 125C
LTC6995C ............................................40C to 85C LTC6995MP ....................................... 55C to 125C
LTC6995I .............................................40C to 85C Junction Temperature ........................................... 150C
LTC6995H .......................................... 40C to 125C Storage Temperature Range .................. 65C to 150C
LTC6995MP ....................................... 55C to 125C Lead Temperature (Soldering, 10 sec)
S6 Package ...........................................................300C
p c F T
LTC6995-1/LTC6995-2 LTC6995-1/LTC6995-2
TOP VIEW
TOP VIEW
+
V 1 6 OUT
7 RST/RST 1 6 OUT
DIV 2 5 GND
GND
+
GND 2 5 V
SET 4 RST/RST
3
SET 3 4 DIV
DCB PACKAGE S6 PACKAGE
6-LEAD (2mm 3mm) PLASTIC DFN 6-LEAD PLASTIC TSOT-23
T = 150C, = 64C/W, = 9.6C/W T = 150C, = 192C/W, = 51C/W
JMAX JA JC
JMAX JA JC
EXPOSED PAD (PIN 7) CONNECTED TO GND,
PCB CONNECTION OPTIONAL
o r D i n F Ma T
Lead Free Finish
TAPE AND REEL (MINI) TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION SPECIFIED TEMPERATURE RANGE
LTC6995CDCB-1#TRMPBF LTC6995CDCB-1#TRPBF LGJM 6-Lead (2mm 3mm) Plastic DFN 0C to 70C
LTC6995IDCB-1#TRMPBF LTC6995IDCB-1#TRPBF LGJM 6-Lead (2mm 3mm) Plastic DFN 40C to 85C
LTC6995HDCB-1#TRMPBF LTC6995HDCB-1#TRPBF LGJM 40C to 125C
6-Lead (2mm 3mm) Plastic DFN
LTC6995CDCB-2#TRMPBF LTC6995CDCB-2#TRPBF LGJP 6-Lead (2mm 3mm) Plastic DFN 0C to 70C
LTC6995IDCB-2#TRMPBF LTC6995IDCB-2#TRPBF LGJP 6-Lead (2mm 3mm) Plastic DFN 40C to 85C
LTC6995HDCB-2#TRMPBF LTC6995HDCB-2#TRPBF LGJP 6-Lead (2mm 3mm) Plastic DFN 40C to 125C
LTC6995CS6-1#TRMPBF LTC6995CS6-1#TRPBF LTGJN 6-Lead Plastic TSOT-23 0C to 70C
LTC6995IS6-1#TRMPBF LTC6995IS6-1#TRPBF LTGJN 6-Lead Plastic TSOT-23 40C to 85C
LTC6995HS6-1#TRMPBF LTC6995HS6-1#TRPBF LTGJN 6-Lead Plastic TSOT-23 40C to 125C
LTC6995MPS6-1#TRMPBF LTC6995MPS6-1#TRPBF LTGJN 6-Lead Plastic TSOT-23 55C to 125C
LTC6995CS6-2#TRMPBF LTC6995CS6-2#TRPBF LTGJQ 6-Lead Plastic TSOT-23 0C to 70C
LTC6995IS6-2#TRMPBF LTC6995IS6-2#TRPBF LTGJQ 6-Lead Plastic TSOT-23 40C to 85C
LTC6995HS6-2#TRMPBF LTC6995HS6-2#TRPBF LTGJQ 6-Lead Plastic TSOT-23 40C to 125C
LTC6995MPS6-2#TRMPBF LTC6995MPS6-2#TRPBF LTGJQ 6-Lead Plastic TSOT-23 55C to 125C
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: