CAT1023: 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 CAT1023 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 CAT1023 provides a precision VCC sense circuit and two open drain outputs: one (RESET) drives high and the other (RESET) drives low whenever VCC falls below the reset threshold voltage. Write operations are disabled if WP is connected to a logic high.
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 CAT1023 has a separate watchdog timer interrupt input pin, WDI.
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, 2k-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 0.8mm maxi
Features
 
  • Precision power supply voltage supervisor
    - 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
Tutorials (1) Package Drawings (2)
Data Sheets (1)  
Availability & Samples
Specifications
Interactive Block Diagram
Product
Status
Compliance
Description
Package
MSL
Container
Budgetary Price/Unit
Type
Case Outline
Type
Temperature
Type
Qty.
CAT1023WI-25-GT3 Lifetime
Pb-free
Halide free
CAT1023 SOIC-8 751BD 1 260 Tape and Reel 3000 $1.2906
CAT1023WI-28-GT3 Active
Pb-free
Halide free
CAT1023 SOIC-8 751BD 1 260 Tape and Reel 3000 $0.7746
CAT1023WI-30-GT3 Lifetime
Pb-free
Halide free
CAT1023 SOIC-8 751BD 1 260 Tape and Reel 3000 $1.2906
CAT1023WI-42-GT3 Lifetime
Pb-free
Halide free
CAT1023 SOIC-8 751BD 1 260 Tape and Reel 3000 $1.2626
CAT1023WI-45-GT3 Lifetime
Pb-free
Halide free
CAT1023 SOIC-8 751BD 1 260 Tape and Reel 3000 $1.2386
CAT1023YI-25-GT3 Lifetime
Pb-free
Halide free
CAT1023 TSSOP-8 948AL 1 260 Tape and Reel 3000 $1.212
CAT1023YI-28-GT3 Lifetime
Pb-free
Halide free
CAT1023 TSSOP-8 948AL 1 260 Tape and Reel 3000 $1.212
CAT1023YI-30-GT3 Lifetime
Pb-free
Halide free
CAT1023 TSSOP-8 948AL 1 260 Tape and Reel 3000 $1.212
CAT1023YI-42-GT3 Lifetime
Pb-free
Halide free
CAT1023 TSSOP-8 948AL 1 260 Tape and Reel 3000 $1.212
CAT1023YI-45-GT3 Lifetime
Pb-free
Halide free
CAT1023 TSSOP-8 948AL 1 260 Tape and Reel 3000 $1.212
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

Product
Description
Pricing ($/Unit)
Compliance
Status
Type
Density
Organization
Data Transmission Standard
fcycle Max (kHz)
tACC Max ns
VCC Min (V)
VCC Max (V)
Istandby Max (µA)
Iact Max (mA)
T Min (°C)
T Max (°C)
Package Type
CAT1023WI-28-GT3  
 $0.7746 
Pb
H
 Active   
Serial
2 kb
256 x 8
I2C
400
900
2.7
5.5
60
3
-40
85
SOIC-8
Case Outlines
751BD    948AL   
Application
Diagram - Block
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