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LTC6993 PDF预览

LTC6993

更新时间: 2024-10-04 01:08:43
品牌 Logo 应用领域
凌特 - Linear /
页数 文件大小 规格书
28页 367K
描述
TimerBlox: Long Timer, Low Frequency Oscillator

LTC6993 数据手册

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LTC6995-1/LTC6995-2  
TimerBlox: Long Timer, Low  
Frequency Oscillator  
FeaTures  
DescripTion  
The LTC®6995 is a silicon oscillator with a programmable  
periodrangeof1.024msto9.54hours(29.1µHzto977Hz),  
specifically intended for long duration timing events. The  
LTC6995 is part of the TimerBlox® family of versatile  
silicon timing devices.  
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  
A single resistor, R , programs the LTC6995’s internal  
SET  
n
55µA to 80µA Supply Current  
master oscillator frequency. The output clock period  
is determined by this master oscillator and an internal  
(2ms to 9.5hr Clock Period)  
n
500µs 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 .  
n
–55°C to 125°C Operating Temperature Range  
NDIV RSET  
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Available in Low Profile (1mm) SOT-23 (ThinSOT™)  
tOUT  
=
1.024ms, NDIV = 1,8,64,...,221  
and 2mm × 3mm DFN Packages  
50kΩ  
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.  
applicaTions  
n
Power-On Reset Timer  
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Long Time One Shot  
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“Heartbeat” Timers  
Watchdog Timers  
Periodic “Wake-Up” Call  
High Vibration, High Acceleration Environments  
n
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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.  
n
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.  
OUTPUT (OSCILLATOR START STATE)  
RST/RST POLARITY  
LTC6995-1  
Oscillating (Low)  
0 (Reset)  
LTC6995-2  
0 (Reset)  
0
1
0
1
0
0
1
1
Oscillating (Low)  
1 (Reset)  
Oscillating (High)  
1 (Reset)  
Oscillating (High)  
Typical applicaTion  
Active Low Power-On Reset Timer  
+
RST  
GND  
SET  
OUT  
V
LTC6995-1  
+
+
V
V
5 SECONDS  
1/2 t  
0.1µF  
OUT  
TIMER STOPPED  
1M  
OUT  
DIV  
POWER-ON RESET  
(1ms TO 4.8 HOURS)  
118k  
392k  
699512 TA01  
699512f  
1
For more information www.linear.com/6995  

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