LTC695
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LTC695

Microprocessor Supervisory Circuits

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Part Details
Part Models 6
1ku List Price Starting From $4.95
Features
  • Guaranteed Reset Assertion at VCC = 1V
  • 1.5mA Maximum Supply Current
  • Fast (35ns Max) Onboard Gating of RAM Chip Enable Signals
  • SO-8 and S16 Packaging
  • 4.65V Precision Voltage Monitor
  • Power OK/Reset Time Delay: 50ms, 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
  • Superior Upgrade for MAX690 Family
Additional Details
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The LTC690 family provides complete power supply monitoring and battery control functions for microprocessor reset, battery back up, CMOS RAM write protection, power failure warning and watchdog timing. A precise internal voltage reference and comparator circuit monitor the power supply line. When an out-of-tolerance condition occurs, the reset outputs are forced to active states and the chip enable output unconditionally write-protects external memory. In addition, the RESET output is guaranteed to remain logic low even with VCC as low as 1V.

The LTC690 family powers the active CMOS 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 LTC690 family provides 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

  • Critical μP Power Monitoring
  • Intelligent Instruments
  • Battery-Powered Computers and Controllers
  • Automotive Systems
Part Models 6
1ku List Price Starting From $4.95

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Documentation

Documentation

Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
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Product Lifecycle

PCN

Oct 11, 2022

- 22_0241

Epoxy Change from Henkel 8290 to 8290A for PDIP Package

Aug 6, 2022

- 22_0172

Laser Top Mark Conversion for PDIP Packages Assembled in ADPG [PNG]

Aug 10, 2022

- 22_0176

Laser Top Mark Conversion for SOIC_W Packages Assembled in ADPG [PNG] and UTL

LTC695CSW#PBF

PRODUCTION

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PRODUCTION

LTC695ISW#PBF

PRODUCTION

LTC695ISW#TRPBF

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Filter by Model

reset

Reset Filters

Part Models

Product Lifecycle

PCN

Oct 11, 2022

- 22_0241

arrow down

Epoxy Change from Henkel 8290 to 8290A for PDIP Package

Aug 6, 2022

- 22_0172

arrow down

Laser Top Mark Conversion for PDIP Packages Assembled in ADPG [PNG]

Aug 10, 2022

- 22_0176

arrow down

Laser Top Mark Conversion for SOIC_W Packages Assembled in ADPG [PNG] and UTL

LTC695CSW#PBF

PRODUCTION

LTC695CSW#TRPBF

PRODUCTION

LTC695ISW#PBF

PRODUCTION

LTC695ISW#TRPBF

PRODUCTION

Software and Part Ecosystem

Software and Part Ecosystem

Tools & Simulations

Tools & Simulations 1

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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