LTC6995-1 datasheet, PDF - EEWORLD Datasheet

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LTC6995-1: DescriptionTimerBlox: Long Timer, Low Frequency Oscillator; File Size358KB，28 Pages; ManufacturerLinear ( ADI ); Websitehttp://www.analog.com/cn/index.html

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LTC6995-1 Overview

TimerBlox: Long Timer, Low Frequency Oscillator

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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, R

SET

, programs the LTC6995’s internal

master oscillator frequency. The output clock period

is determined by this master oscillator and an internal

frequency divider, N

DIV

, programmable to eight settings

from 1 to 2

OUT

DIV

• R

SET

• 1.024ms, N

DIV

1,8,64,...,2

50kΩ

Period Range: 1ms to 9.5 Hours

Timing Reset by Power-On or Reset Input

Configured with 1 to 3 Resistors

<1.5% Maximum Frequency Error

Programmable Output Polarity

2.25V to 5.5V Single Supply Operation

55µA to 80µA Supply Current

(2ms to 9.5hr Clock Period)

500µs Start-Up Time

CMOS Output Driver Sources/Sinks 20mA

–55°C to 125°C Operating Temperature Range

Available in Low Profile (1mm) SOT-23 (ThinSOT™)

and 2mm

3mm DFN Packages

applicaTions

Power-On Reset Timer

Long Time One Shot

“Heartbeat” Timers

Watchdog Timers

Periodic “Wake-Up” Call

High Vibration, High Acceleration Environments

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.

OUTPUT (OSCILLATOR START STATE)

RST/RST

POLARITY

LTC6995-1

Oscillating (Low)

0 (Reset)

Oscillating (High)

1 (Reset)

LTC6995-2

0 (Reset)

Oscillating (Low)

1 (Reset)

Oscillating (High)

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.

Typical applicaTion

RST

GND

SET

OUT

LTC6995-1

Active Low Power-On Reset Timer

0.1µF

OUT

5 SECONDS

1/2 t

OUT

POWER-ON RESET

(1ms TO 4.8 HOURS)

TIMER STOPPED

118k

DIV

392k

699512 TA01

699512f

For more information

www.linear.com/6995

LTC6995-1 Related Products

	LTC6995-1	LTC6992	LTC6993	LTC6994
Description	TimerBlox: Long Timer, Low Frequency Oscillator	TimerBlox: Long Timer, Low Frequency Oscillator	TimerBlox: Long Timer, Low Frequency Oscillator	TimerBlox: Long Timer, Low Frequency Oscillator

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