CAT1022: EEPROM Serial 2-Kb CPU Supervisor

Datasheet: Supervisory Circuits with I²C Serial 2k-bit CMOS EEPROM, Manual Reset and Watchdog Timer
Rev. P (210.0kB)
Product Overview
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The CAT1022 is a complete memory and supervisory solution for microcontroller based systems. A EEPROM Serial 2-Kb CPU Supervisor memory 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 CAT1022 has a RESET output and does not have a Write Protect input.
The supervisor has 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 watchdog timer monitors the SDA signal.
The power supply monitor and reset circuit protect memory and system controllers during power up/down and against brownout conditions. Five reset threshold voltages support 5.0 V, 3.3 V and 3.0 V systems. If power supply voltages are out of tolerance reset signals become active, preventing the system microcontroller, ASIC or peripherals from operating. Reset signals become inactive typically 200 ms after the supply voltage exceeds the reset threshold level. With both active high and low reset signals, interface to microcontrollers and other ICs is simple. In addition, the RESET pin or a separate input, MR, can be used as an input for push-button manual reset capability.
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 options are 3x3 mm.
Features
 
  • Precision power supply voltage monitor
    - 5.0 V, 3.3 V and 3.0 V systems
    - Five threshold voltage options
  • Watchdog timer
  • Active high or low reset
    - Valid reset guaranteed at 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 input
  • 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
Data Sheets (1) Package Drawings (2)
Product
Status
Compliance
Description
Package
MSL
Container
Budgetary Price/Unit
Type
Case Outline
Type
Temperature
Type
Qty.
CAT1022WI-25-GT3 Lifetime
Pb-free
Halide free
CAT1022 SOIC-8 751BD 1 260 Tape and Reel 3000 $0.78
CAT1022WI-28-GT3 Lifetime
Pb-free
Halide free
CAT1022 SOIC-8 751BD 1 260 Tape and Reel 3000 $0.78
CAT1022WI-30-GT3 Lifetime
Pb-free
Halide free
CAT1022 SOIC-8 751BD 1 260 Tape and Reel 3000 $0.9586
CAT1022WI-42-GT3 Lifetime
Pb-free
Halide free
CAT1022 SOIC-8 751BD 1 260 Tape and Reel 3000 $0.78
CAT1022WI-45-GT3 Lifetime
Pb-free
Halide free
CAT1022 SOIC-8 751BD 1 260 Tape and Reel 3000 $0.9506
CAT1022YI-25-GT3 Lifetime
Pb-free
Halide free
CAT1022 TSSOP-8 948AL 1 260 Tape and Reel 3000 $0.9
CAT1022YI-28-GT3 Lifetime
Pb-free
Halide free
CAT1022 TSSOP-8 948AL 1 260 Tape and Reel 3000 $0.9
CAT1022YI-30-GT3 Lifetime
Pb-free
Halide free
CAT1022 TSSOP-8 948AL 1 260 Tape and Reel 3000 $0.9
CAT1022YI-42-GT3 Lifetime
Pb-free
Halide free
CAT1022 TSSOP-8 948AL 1 260 Tape and Reel 3000 $0.9
CAT1022YI-45-GT3 Lifetime
Pb-free
Halide free
CAT1022 TSSOP-8 948AL 1 260 Tape and Reel 3000 $0.9
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
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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