CAT1026: CPU Supervisor with 2 k EEPROM Memory

The CAT1026 is a complete memory and supervisory solution for microcontroller-based systems. A 2 k-bit serial EEPROM 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 CAT1026 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.The CAT1026 features two open drain reset outputs: one (RESET) drives high and the other (RESET) drives low whenever VCC falls below the threshold. Reset outputs become inactive typically 200 ms after the supply voltage exceeds the reset threshold value. With both active high and low reset signals, interface to microcontrollers and other ICs is simple. In addition, the RESET pin can be used as an input for push-button manual reset capability.The CAT1026 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 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 0.8 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
  • 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
Data Sheets (1)
Document TitleDocument ID/SizeRevisionRevision Date
Dual Voltage Supervisory Circuits with I²C Serial 2k-bit CMOS EEPROMCAT1026/D (186.0kB)18
Package Drawings (5)
Document TitleDocument ID/SizeRevision
MSOP 8, 3x3846AD (56.5kB)revo
PDIP-8, 300 mils646AA (55.8kB)A
SOIC 8, 150 mils751BD (55.6kB)revo
TDFN8, 3x3511AL (55.4kB)A
TSSOP8, 4.4x3948AL (55.7kB)revo
Order Information
ProductStatusCompliancePackageMSL*ContainerBudgetary Price/Unit
CAT1026LI-25-GLifetimePb-free Halide freePDIP-8646AANATube50$0.8866
CAT1026LI-28-GLifetimePb-free Halide freePDIP-8646AANATube50$0.8866
CAT1026LI-30-GLifetimePb-free Halide freePDIP-8646AANATube50$0.8866
CAT1026LI-42-GLifetimePb-free Halide freePDIP-8646AANATube50$0.8866
CAT1026LI-45-GLifetimePb-free Halide freePDIP-8646AANATube50$0.8866
CAT1026WI-25-GT3ActivePb-free Halide freeSOIC-8751BD1Tape and Reel3000$0.78
CAT1026WI-28-GActivePb-free Halide freeSOIC-8751BD1Tube100$0.8666
CAT1026WI-28-GT3ActivePb-free Halide freeSOIC-8751BD1Tape and Reel3000$0.78
CAT1026WI-30-GT3ActivePb-free Halide freeSOIC-8751BD1Tape and Reel3000$0.78
CAT1026WI-42-GT3Last ShipmentsPb-free Halide freeSOIC-8751BD1Tape and Reel3000
CAT1026WI-45-GT3ActivePb-free Halide freeSOIC-8751BD1Tape and Reel3000$0.78
CAT1026YI-25-GT3ActivePb-free Halide freeTSSOP-8948AL1Tape and Reel3000$0.78
CAT1026YI-28-GT3ActivePb-free Halide freeTSSOP-8948AL1Tape and Reel3000$0.78
CAT1026YI-30-GT3ActivePb-free Halide freeTSSOP-8948AL1Tape and Reel3000$0.78
CAT1026YI-42-GT3ActivePb-free Halide freeTSSOP-8948AL1Tape and Reel3000$0.78
CAT1026YI-45-GT3ActivePb-free Halide freeTSSOP-8948AL1Tape and Reel3000$0.78
CAT1026ZD4I-25T3Consult Sales OfficePb-free Halide freeTDFN-8511AL1Tape and Reel3000
CAT1026ZD4I-28T3Consult Sales OfficePb-free Halide freeTDFN-8511AL1Tape and Reel3000
CAT1026ZD4I-30T3Consult Sales OfficePb-free Halide freeTDFN-8511AL1Tape and Reel3000
CAT1026ZD4I-42T3Consult Sales OfficePb-free Halide freeTDFN-8511AL1Tape and Reel3000
CAT1026ZD4I-45T3Consult Sales OfficePb-free Halide freeTDFN-8511AL1Tape and Reel3000
CAT1026ZI-25-GT3ActivePb-free Halide freeMSOP-8846AD1Tape and Reel3000$0.9066
CAT1026ZI-28-GT3ActivePb-free Halide freeMSOP-8846AD1Tape and Reel3000$0.9066
CAT1026ZI-30-GT3ActivePb-free Halide freeMSOP-8846AD1Tape and Reel3000$0.9066
CAT1026ZI-42-GT3ActivePb-free Halide freeMSOP-8846AD1Tape and Reel3000$0.9066
CAT1026ZI-45-GT3ActivePb-free Halide freeMSOP-8846AD1Tape and Reel3000$0.9066
Specifications
ProductTypeDensityOrganizationData Transmission Standardfcycle Max (kHz)tACC Max nsVCC Min (V)VCC Max (V)Istandby Max (µA)Iact Max (mA)T Min (°C)T Max (°C)
CAT1026WI-25-GT3Serial2 kb256 x 8I2C4009002.75.5503-4085
CAT1026WI-28-GSerial2 kb256 x 8I2C4009002.75.5503-4085
CAT1026WI-28-GT3Serial2 kb256 x 8I2C4009002.75.5503-4085
CAT1026WI-30-GT3Serial2 kb256 x 8I2C4009002.75.5503-4085
CAT1026WI-45-GT3Serial2 kb256 x 8I2C4009002.75.5503-4085
CAT1026YI-25-GT3Serial2 kb256 x 8I2C4009002.75.5503-4085
CAT1026YI-28-GT3Serial2 kb256 x 8I2C4009002.75.5503-4085
CAT1026YI-30-GT3Serial2 kb256 x 8I2C4009002.75.5503-4085
CAT1026YI-42-GT3Serial2 kb256 x 8I2C4009002.75.5503-4085
CAT1026YI-45-GT3Serial2 kb256 x 8I2C4009002.75.5503-4085
CAT1026ZI-25-GT3Serial2 kb256 x 8I2C4009002.75.5503-4085
CAT1026ZI-28-GT3Serial2 kb256 x 8I2C4009002.75.5503-4085
CAT1026ZI-30-GT3Serial2 kb256 x 8I2C4009002.75.5503-4085
CAT1026ZI-42-GT3Serial2 kb256 x 8I2C4009002.75.5503-4085
CAT1026ZI-45-GT3Serial2 kb256 x 8I2C4009002.75.5503-4085
Dual Voltage Supervisory Circuits with I²C Serial 2k-bit CMOS EEPROM (186.0kB) CAT1026
PDIP-8, 300 mils CAT93C86B
SOIC 8, 150 mils CAV93C86
TSSOP8, 4.4x3 PCA9306
TDFN8, 3x3 CAT1027
MSOP 8, 3x3 CAT25010