LTC695-3.3
LTC695-3.3
PRODUCTION3.3V Microprocessor Supervisory Circuits
- Part Models
- 6
- 1ku List Price
- Starting From $7.47
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Overview
- Guaranteed Reset Assertion at VCC = 1V
- Pin Compatible with LTC694/LTC695 for 3.3V Systems
- 200μA Typical Supply Current
- Fast (30ns Typ) Onboard Gating of RAM Chip Enable Signals
- SO-8 and S16 Packages
- 2.90V Precision Voltage Monitor
- Power OK/Reset Time Delay: 200ms or Adjustable
- Minimum External Component Count
- 1μA Maximum Standby Current
- Voltage Monitor for Power-Fail or Low-Battery Warning
- Thermal Limiting
- Performance Specified Over Temperature
The LTC694-3.3/LTC695-3.3 provide complete 3.3V power supply monitoring and battery control functions. These include power-on reset, battery back-up, RAM write protection, power failure warning and watchdog timing. The devices are pin compatible upgrades of the LTC694/LTC695 that are optimized for 3.3V systems. Operating power consumption has been reduced to 0.6mW (typical) and 3μW maximum in battery back-up mode. Microprocessor reset and memory write protection are provided when the supply falls below 2.9V. The RESET output is guaranteed to remain logic low with VCC as low as 1V.
The LTC694-3.3/LTC695-3.3 power the active RAMs with a charge pumped NMOS power switch to achieve low dropout and low supply current. When primary power is lost, auxiliary power, connected to the battery input pin, powers the RAMs in standby through an efficient PMOS switch.
For an early warning of impending power failure, the LTC694-3.3/LTC695-3.3 provide an internal comparator with a user-defined threshold. An internal watchdog timer is also available, which forces the reset pins to active states when the watchdog input is not toggled prior to a preset timeout period.
Applications
- 3.3V Low Power Systems
- Critical μP Power Monitoring
- Intelligent Instruments
- Battery-Powered Computers and Controllers
- Automotive Systems
Documentation
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.
| Part Model | Pin/Package Drawing | Documentation | CAD Symbols, Footprints, and 3D Models |
|---|---|---|---|
| LTC695CN-3.3#PBF | 16-Lead PDIP (Narrow 0.30 Inch) | ||
| LTC695CSW-3.3#PBF | 16-Lead SOIC (Wide 0.3 Inch) | ||
| LTC695CSW-3.3#TRPBF | 16-Lead SOIC (Wide 0.3 Inch) | ||
| LTC695IN-3.3#PBF | 16-Lead PDIP (Narrow 0.30 Inch) | ||
| LTC695ISW-3.3#PBF | 16-Lead SOIC (Wide 0.3 Inch) | ||
| LTC695ISW-3.3#TRPBF | 16-Lead SOIC (Wide 0.3 Inch) |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
Oct 11, 2022 - 22_0241 Epoxy Change from Henkel 8290 to 8290A for PDIP Package |
||
| LTC695CN-3.3#PBF | PRODUCTION | |
| LTC695IN-3.3#PBF | PRODUCTION | |
|
Aug 6, 2022 - 22_0172 Laser Top Mark Conversion for PDIP Packages Assembled in ADPG [PNG] |
||
| LTC695CN-3.3#PBF | PRODUCTION | |
| LTC695IN-3.3#PBF | PRODUCTION | |
|
Aug 10, 2022 - 22_0176 Laser Top Mark Conversion for SOIC_W Packages Assembled in ADPG [PNG] and UTL |
||
| LTC695CSW-3.3#PBF | PRODUCTION | |
| LTC695CSW-3.3#TRPBF | PRODUCTION | |
| LTC695ISW-3.3#PBF | PRODUCTION | |
| LTC695ISW-3.3#TRPBF | PRODUCTION | |
This is the most up-to-date revision of the Data Sheet.
Software Resources
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LTspice
Models for the following parts are available in LTspice:
- LTC695
- LTC695-3.3
LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.
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