CAT1027: EEPROM Serial 2-Kb CPU Supervisor

Datasheet: Dual Voltage Supervisory Circuits with I²C Serial 2k-bit CMOS EEPROM
Rev. P (197.0kB)
Product Overview
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The CAT1027 is a complete memory and supervisory solution for microcontroller-based systems. A EEPROM Serial 2-Kb CPU Supervisor and a system power supervisor with brown-out protection are integrated together in low power CMOS technology. Memory interface is via a 400 kHz I²C bus.
The CAT1027 provides a precision VCC sense circuit with five reset threshold voltage options that support 5.0 V, 3.3 V and 3.0 V systems. The power supply monitor and reset circuit protects memory and systems controllers during power up/down and against brownout conditions. If power supply voltages are out of tolerance reset signals become active preventing the system microcontroller, ASIC, or peripherals from operating.
CAT1027 has only a RESET output. In addition, the RESET pin can be used as an input for push-button manual reset capability.
The CAT1027 provides an auxiliary voltage sensor input, VSENSE, which is used to monitor a second system supply. The auxiliary high impedance comparator drives the open drain output, VLOW, whenever the sense voltage is below 1.25 V threshold.
The CAT1027 is designed with a 1.6 second watchdog timer circuit that resets a system to a known state if software or a hardware glitch halts or 'hangs' the system. The CAT1027 features a watchdog timer interrupt input, WDI.
The on-chip 2 k-bit EEPROM memory features a 16-byte page. In addition, hardware data protection is provided by a VCC sense circuit that prevents writes to memory whenever VCC falls below the reset threshold or until VCC reaches the reset threshold during power up.
Available packages include an 8-pin DIP, 8-pin SOIC, 8-pin TSSOP, 8-pin TDFN and 8-pin MSOP. The TDFN package thickness is 0.8 mm maximum. TDFN footprint is 3x3 mm.
Features
 
  • Precision VCC power supply voltage supervisor
    5.0 V, 3.3 V and 3.0 V systems
    Five threshold voltage options
  • Additional voltage monitoring
    — Externally adjustable down to 1.25 V
  • Watchdog timer
  • Active high or low reset
    — Valid reset guaranteed to VCC = 1 V
  • 400 kHz I²C bus
  • 3.0 V to 5.5 V operation
  • Low power CMOS technology
  • 16-Byte page write buffer
  • Built-in inadvertent write protection
  • 1,000,000 Program/Erase cycles
  • Manual reset capability
  • 100 year data retention
  • 8-pin DIP, SOIC, TSSOP, MSOP or TDFN
    (3 x 3 mm foot-print) packages
    — TDFN max height is 0.8mm
  • Industrial and extended temperature ranges
Applications
  • Industrial control
  • Medical systems
  • Printers
  • Mass storage
Technical Documentation & Design Resources
Tutorials (1) Package Drawings (2)
Data Sheets (1)  
Product
Status
Compliance
Description
Package
MSL
Container
Budgetary Price/Unit
Type
Case Outline
Type
Temperature
Type
Qty.
CAT1027WI-25-GT3 Lifetime
Pb-free
Halide free
CAT1027 SOIC-8 751BD 1 260 Tape and Reel 3000 $0.78
CAT1027WI-28-GT3 Lifetime
Pb-free
Halide free
CAT1027 SOIC-8 751BD 1 260 Tape and Reel 3000 $0.9466
CAT1027WI-30-GT3 Lifetime
Pb-free
Halide free
CAT1027 SOIC-8 751BD 1 260 Tape and Reel 3000 $0.78
CAT1027WI-42-GT3 Lifetime
Pb-free
Halide free
CAT1027 SOIC-8 751BD 1 260 Tape and Reel 3000 $0.78
CAT1027WI-45-GT3 Lifetime
Pb-free
Halide free
CAT1027 SOIC-8 751BD 1 260 Tape and Reel 3000 $0.94
CAT1027YI-25-GT3 Lifetime
Pb-free
Halide free
CAT1027 TSSOP-8 948AL 1 260 Tape and Reel 3000 $0.8893
CAT1027YI-28-GT3 Lifetime
Pb-free
Halide free
CAT1027 TSSOP-8 948AL 1 260 Tape and Reel 3000 $0.8893
CAT1027YI-30-GT3 Lifetime
Pb-free
Halide free
CAT1027 TSSOP-8 948AL 1 260 Tape and Reel 3000 $0.8893
CAT1027YI-42-GT3 Lifetime
Pb-free
Halide free
CAT1027 TSSOP-8 948AL 1 260 Tape and Reel 3000 $0.8893
CAT1027YI-45-GT3 Lifetime
Pb-free
Halide free
CAT1027 TSSOP-8 948AL 1 260 Tape and Reel 3000 $0.8893
Market Leadtime (weeks) : Contact Factory
Market Leadtime (weeks) : Contact Factory
Market Leadtime (weeks) : Contact Factory
Market Leadtime (weeks) : Contact Factory
Market Leadtime (weeks) : Contact Factory
ON Semiconductor   (2020-09-02 00:00) : 3,000
Market Leadtime (weeks) : Contact Factory
Market Leadtime (weeks) : Contact Factory
Market Leadtime (weeks) : Contact Factory
Market Leadtime (weeks) : Contact Factory
Market Leadtime (weeks) : Contact Factory
Case Outlines
751BD    948AL   
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