CAT1640: CPU Supervisor with 64 k Serial EEPROM Memory

The CAT1640 is a complete memory and supervisory solution for microcontroller-based systems. A 64kbit 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 400kHz I²C bus. The CAT1640 provides a precision VCC sense circuit and drives an open drain output, RESET low whenever VCC falls below the reset threshold voltage. 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 5V, 3.3V and 3V 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 options, 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 CAT1640 memory features a 64-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, SOIC, TSSOP and 4.9 x 3mm TDFN.

Features
  • Precision power supply voltage monitor - 5V, 3.3V and 3V systems - +5.0V (+/- 5%, +/- 10%) - +3.3V (+/- 5%, +/- 10%) - +3.0V (+/- 10%)
  • Active low reset
  • Valid reset guaranteed at VCC=1V
  • 400kHz I²C bus
  • 3.0V to 5.5V operation
  • Low power CMOS technology
  • 64-Byte page write buffer
  • 1,000,000 Program/Erase cycles
  • 100 year data retention
  • 8-pin DIP, SOIC, TSSOP and TDFN packages
  • Industrial temperature range
Applications
  • Industrial control
  • Medical systems
  • Printers
  • Mass storage
Data Sheets (1)
Document TitleDocument ID/SizeRevisionRevision Date
CPU Supervisor with 64 k EEPROMCAT1640/D (170.0kB)5
Package Drawings (4)
Document TitleDocument ID/SizeRevision
PDIP-8, 300 mils646AA (55.8kB)A
SOIC 8, 150 mils751BD (55.6kB)revo
TDFN8, 3x4.9511AM (57.0kB)A
TSSOP8, 4.4x3948AL (55.7kB)revo
Order Information
ProductStatusCompliancePackageMSL*ContainerBudgetary Price/Unit
CAT1640LI-25-GLifetimePb-free Halide freePDIP-8646AANATube50$1.1933
CAT1640LI-28-GLifetimePb-free Halide freePDIP-8646AANATube50$1.1933
CAT1640LI-30-GLifetimePb-free Halide freePDIP-8646AANATube50$1.1933
CAT1640LI-42-GLifetimePb-free Halide freePDIP-8646AANATube50$1.1933
CAT1640LI-45-GLifetimePb-free Halide freePDIP-8646AANATube50$1.1933
CAT1640WI-25-GT3ActivePb-free Halide freeSOIC-8751BD1Tape and Reel3000$1.1733
CAT1640WI-28-GT3ActivePb-free Halide freeSOIC-8751BD1Tape and Reel3000$1.1733
CAT1640WI-30-GActivePb-free Halide freeSOIC-8751BD1Tube100$1.1733
CAT1640WI-30-GT3ActivePb-free Halide freeSOIC-8751BD1Tape and Reel3000$1.1733
CAT1640WI-42-GT3ActivePb-free Halide freeSOIC-8751BD1Tape and Reel3000$1.1733
CAT1640WI-45-GT3ActivePb-free Halide freeSOIC-8751BD1Tape and Reel3000$1.1733
CAT1640YI-25-GT3ActivePb-free Halide freeTSSOP-8948AL1Tape and Reel3000$1.1733
CAT1640YI-28-GT3ActivePb-free Halide freeTSSOP-8948AL1Tape and Reel3000$1.1733
CAT1640YI-30-GT3ActivePb-free Halide freeTSSOP-8948AL1Tape and Reel3000$1.1733
CAT1640YI-42-GT3ActivePb-free Halide freeTSSOP-8948AL1Tape and Reel3000$1.1733
CAT1640YI-45-GT3ActivePb-free Halide freeTSSOP-8948AL1Tape and Reel3000$1.1733
CAT1640ZD2I28GT3Last ShipmentsPb-free Halide freeTDFN-8511AM1Tape and Reel3000
CAT1640ZD2I30GT3Last ShipmentsPb-free Halide freeTDFN-8511AM1Tape and Reel3000
CAT1640ZD2I45GT3Consult Sales OfficePb-free Halide freeTDFN-8511AM1Tape and Reel3000
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)
CAT1640WI-25-GT3Serial64 kb8k x 8I2C400-35.5403-4085
CAT1640WI-28-GT3Serial64 kb8k x 8I2C400-35.5403-4085
CAT1640WI-30-GSerial64 kb8k x 8I2C400-35.5403-4085
CAT1640WI-30-GT3Serial64 kb8k x 8I2C400-35.5403-4085
CAT1640WI-42-GT3Serial64 kb8k x 8I2C400-35.5403-4085
CAT1640WI-45-GT3Serial64 kb8k x 8I2C400-35.5403-4085
CAT1640YI-25-GT3Serial64 kb8k x 8I2C400-35.5403-4085
CAT1640YI-28-GT3Serial64 kb8k x 8I2C400-35.5403-4085
CAT1640YI-30-GT3Serial64 kb8k x 8I2C400-35.5403-4085
CAT1640YI-42-GT3Serial64 kb8k x 8I2C400-35.5403-4085
CAT1640YI-45-GT3Serial64 kb8k x 8I2C400-35.5403-4085
CPU Supervisor with 64 k EEPROM (170.0kB) CAT1640
PDIP-8, 300 mils CAT93C86B
SOIC 8, 150 mils CAV93C86
TSSOP8, 4.4x3 PCA9306
TDFN8, 3x4.9 CAT1641