LTC6995 - TimerBlox: Long Timer, Low Frequency Oscillator

Features

  • 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
  • Click here to start your design with the LTC6995 Online Design Tool!

Typical Application

LTC6995-1 Typical Application

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, NDIV , programmable to eight settings from 1 to 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.

Packaging

CAD Symbols and Footprints: The downloadable Zip file below contains the schematic symbol and PCB footprints.

For complete and up to date package information and drawings, please refer to our packaging page

Part Number Package Code Temp Package
Drawing
RoHS
LTC6995CDCB-1#PBF 2x3 DFN-6 DCB C 05-08-1715 Yes
LTC6995CDCB-1#TRMPBF 2x3 DFN-6 DCB C 05-08-1715 Yes
LTC6995CDCB-1#TRPBF 2x3 DFN-6 DCB C 05-08-1715 Yes
LTC6995CDCB-2#PBF 2x3 DFN-6 DCB C 05-08-1715 Yes
LTC6995CDCB-2#TRMPBF 2x3 DFN-6 DCB C 05-08-1715 Yes
LTC6995CDCB-2#TRPBF 2x3 DFN-6 DCB C 05-08-1715 Yes
LTC6995CS6-1#PBF SOT-23 S6 C 05-08-1636 Yes
LTC6995CS6-1#TRMPBF SOT-23 S6 C 05-08-1636 Yes
LTC6995CS6-1#TRPBF SOT-23 S6 C 05-08-1636 Yes
LTC6995CS6-2#PBF SOT-23 S6 C 05-08-1636 Yes
LTC6995CS6-2#TRMPBF SOT-23 S6 C 05-08-1636 Yes
LTC6995CS6-2#TRPBF SOT-23 S6 C 05-08-1636 Yes
LTC6995HDCB-1#PBF 2x3 DFN-6 DCB H 05-08-1715 Yes
LTC6995HDCB-1#TRMPBF 2x3 DFN-6 DCB H 05-08-1715 Yes
LTC6995HDCB-1#TRPBF 2x3 DFN-6 DCB H 05-08-1715 Yes
LTC6995HDCB-2#PBF 2x3 DFN-6 DCB H 05-08-1715 Yes
LTC6995HDCB-2#TRMPBF 2x3 DFN-6 DCB H 05-08-1715 Yes
LTC6995HDCB-2#TRPBF 2x3 DFN-6 DCB H 05-08-1715 Yes
LTC6995HS6-1#PBF SOT-23 S6 H 05-08-1636 Yes
LTC6995HS6-1#TRMPBF SOT-23 S6 H 05-08-1636 Yes
LTC6995HS6-1#TRPBF SOT-23 S6 H 05-08-1636 Yes
LTC6995HS6-2#PBF SOT-23 S6 H 05-08-1636 Yes
LTC6995HS6-2#TRMPBF SOT-23 S6 H 05-08-1636 Yes
LTC6995HS6-2#TRPBF SOT-23 S6 H 05-08-1636 Yes
LTC6995IDCB-1#PBF 2x3 DFN-6 DCB I 05-08-1715 Yes
LTC6995IDCB-1#TRMPBF 2x3 DFN-6 DCB I 05-08-1715 Yes
LTC6995IDCB-1#TRPBF 2x3 DFN-6 DCB I 05-08-1715 Yes
LTC6995IDCB-2#PBF 2x3 DFN-6 DCB I 05-08-1715 Yes
LTC6995IDCB-2#TRMPBF 2x3 DFN-6 DCB I 05-08-1715 Yes
LTC6995IDCB-2#TRPBF 2x3 DFN-6 DCB I 05-08-1715 Yes
LTC6995IS6-1#PBF SOT-23 S6 I 05-08-1636 Yes
LTC6995IS6-1#TRMPBF SOT-23 S6 I 05-08-1636 Yes
LTC6995IS6-1#TRPBF SOT-23 S6 I 05-08-1636 Yes
LTC6995IS6-2#PBF SOT-23 S6 I 05-08-1636 Yes
LTC6995IS6-2#TRMPBF SOT-23 S6 I 05-08-1636 Yes
LTC6995IS6-2#TRPBF SOT-23 S6 I 05-08-1636 Yes
LTC6995MPS6-1#PBF SOT-23 S6 MP 05-08-1636 Yes
LTC6995MPS6-1#TRMPBF SOT-23 S6 MP 05-08-1636 Yes
LTC6995MPS6-1#TRPBF SOT-23 S6 MP 05-08-1636 Yes
LTC6995MPS6-2#PBF SOT-23 S6 MP 05-08-1636 Yes
LTC6995MPS6-2#TRMPBF SOT-23 S6 MP 05-08-1636 Yes
LTC6995MPS6-2#TRPBF SOT-23 S6 MP 05-08-1636 Yes


LTC6995-1 Package Drawing
LTC6995-1 Package Drawing

Order Info

  • Part numbers ending in PBF are lead free. Solder plated terminal finish (SnPb) versions are non-standard and special terms and conditions and pricing applies if available. Please contact LTC marketing for information.
  • Part numbers containing TR or TRM are shipped in tape and reel or 500 unit mini tape and reel, respectively
  • Please refer to our general ordering information or the product datasheet for more details

Package Variations and Pricing

Part Number Package Temp Price
(1-99)
Price
(1k)*
RoHS
LTC6995CDCB-1#PBF 2x3 DFN-6 C $1.88 Yes
LTC6995CDCB-1#TRMPBF 2x3 DFN-6 C $1.88 $1.40 Yes
LTC6995CDCB-1#TRPBF 2x3 DFN-6 C $1.35 Yes
LTC6995CDCB-2#PBF 2x3 DFN-6 C $1.88 Yes
LTC6995CDCB-2#TRMPBF 2x3 DFN-6 C $1.88 $1.40 Yes
LTC6995CDCB-2#TRPBF 2x3 DFN-6 C $1.35 Yes
LTC6995CS6-1#PBF SOT-23 C $1.88 Yes
LTC6995CS6-1#TRMPBF SOT-23 C $1.88 $1.40 Yes
LTC6995CS6-1#TRPBF SOT-23 C $1.35 Yes
LTC6995CS6-2#PBF SOT-23 C $1.88 Yes
LTC6995CS6-2#TRMPBF SOT-23 C $1.88 $1.40 Yes
LTC6995CS6-2#TRPBF SOT-23 C $1.35 Yes
LTC6995HDCB-1#PBF 2x3 DFN-6 H $2.63 Yes
LTC6995HDCB-1#TRMPBF 2x3 DFN-6 H $2.63 $1.94 Yes
LTC6995HDCB-1#TRPBF 2x3 DFN-6 H $1.89 Yes
LTC6995HDCB-2#PBF 2x3 DFN-6 H $2.63 Yes
LTC6995HDCB-2#TRMPBF 2x3 DFN-6 H $2.63 $1.94 Yes
LTC6995HDCB-2#TRPBF 2x3 DFN-6 H $1.89 Yes
LTC6995HS6-1#PBF SOT-23 H $2.63 Yes
LTC6995HS6-1#TRMPBF SOT-23 H $2.63 $1.94 Yes
LTC6995HS6-1#TRPBF SOT-23 H $1.89 Yes
LTC6995HS6-2#PBF SOT-23 H $2.63 Yes
LTC6995HS6-2#TRMPBF SOT-23 H $2.63 $1.94 Yes
LTC6995HS6-2#TRPBF SOT-23 H $1.89 Yes
LTC6995IDCB-1#PBF 2x3 DFN-6 I $2.16 Yes
LTC6995IDCB-1#TRMPBF 2x3 DFN-6 I $2.16 $1.60 Yes
LTC6995IDCB-1#TRPBF 2x3 DFN-6 I $1.55 Yes
LTC6995IDCB-2#PBF 2x3 DFN-6 I $2.16 Yes
LTC6995IDCB-2#TRMPBF 2x3 DFN-6 I $2.16 $1.60 Yes
LTC6995IDCB-2#TRPBF 2x3 DFN-6 I $1.55 Yes
LTC6995IS6-1#PBF SOT-23 I $2.16 Yes
LTC6995IS6-1#TRMPBF SOT-23 I $2.16 $1.60 Yes
LTC6995IS6-1#TRPBF SOT-23 I $1.55 Yes
LTC6995IS6-2#PBF SOT-23 I $2.16 Yes
LTC6995IS6-2#TRMPBF SOT-23 I $2.16 $1.60 Yes
LTC6995IS6-2#TRPBF SOT-23 I $1.55 Yes
LTC6995MPS6-1#PBF SOT-23 MP $5.64 Yes
LTC6995MPS6-1#TRMPBF SOT-23 MP $5.64 $4.10 Yes
LTC6995MPS6-1#TRPBF SOT-23 MP $4.05 Yes
LTC6995MPS6-2#PBF SOT-23 MP $5.64 Yes
LTC6995MPS6-2#TRMPBF SOT-23 MP $5.64 $4.10 Yes
LTC6995MPS6-2#TRPBF SOT-23 MP $4.05 Yes
Buy NowRequest Samples
* The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Linear Technology sales office or authorized distributor.

Demo Boards

Linear Technology offers many demo boards free of charge to qualified customers. Contact your local sales office or distributor to inquire about a demo board. Certain demo boards are also available for sale via credit card on this website. Demo boards are for evaluation purposes only. It remains the customer’s responsibility to verify proper and reliable operation in the actual end application.

Part Number Description Price Documentation
DC1562B-M LTC6995-1: 1sec Power-on Reset (-1 Device with Active High Reset Input) $25.00
DC1562B-N LTC6995-2: 1sec Power-on Reset (-2 Device with Active Low Reset Input) $25.00
Buy Now
Click here to view our complete list of demo boards

Applications

  • Power-On Reset Timer
  • Long Time One Shot
  • “Heartbeat” Timers
  • Watchdog Timers
  • Periodic “Wake-Up” Call
  • High Vibration, High Acceleration Environments

Product Notifications

Please login to your MyLinear account for notifications of datasheet updates, new document releases and LTspice model announcements for your favorite products. If you do not have a MyLinear account you may Sign Up Now.

Forgot your password? Click here.
Need help? Email mylinear@linear.com with questions and comments.

Design Tools

LTspice

LTspice® software is a powerful, fast and free simulation tool, schematic capture and waveform viewer with enhancements and models for improving the simulation of switching regulators. Click here to download LTspice

To launch a ready to run LTspice demonstration circuit for this part:

  • Step 1: If you have not installed LTspice on this computer, download and install LTspice
  • Step 2: Once LTspice is installed, click on the link(s) below to launch the simulation
  • Step 3: If LTspice does not automatically open after clicking the link above, you can instead run the simulation by right clicking on the link and selecting "Save Target As." After saving the file to your computer, start LTspice and open the demonstration circuit by selecting 'Open' from the 'File' menu

To explore other ready to run LTspice demonstration circuits, please visit our Demo Circuits Collection.

Models for the following parts are available in LTspice:
LTC6995-1
LTC6995-2

LTC6995 Online Design Tool

The LTC6995 Online Design Tool is a synthesis and configuration tool that allows you to:

  • Select the frequency and duty cycle of operation
  • Calculate the required external component values
  • Export to LTspice for simulation

Click here to start your design with the LTC6995 Online Design Tool

TimerBlox Designer (MS Excel)

Use this Excel based tool to speed your designs with the LTC6990, LTC6991, LTC6992, LTC6993, LTC6994 and LTC6995

Click here to download TimerBlox Designer

Technical Support