Features: Precision power supply voltage monitor
- 5V, 3.3V and 3V systems
- Five threshold voltage options
Active high or low reset
- Valid reset guaranteed at VCC = 1V
400kHz I2C bus
3.0V to 5.5V operation
Low power CMOS technology
16-Byte page write buffer
Built-in inadvertent write protection
- WP pin (CAT1025)
1,000,000 Program/Erase cycles
Manual reset input
100 year data retention
8-pin DIP, SOIC, TSSOP, MSOP &
TDFN (3x3mm foot print) packages
Industrial and extended temperature rangesPinout
SpecificationsTemperature Under Bias ................. 55°C to +125°C
Storage Temperature ...................... 65°C to +150°C
Voltage on any Pin with
Respect to Ground(1) .................2.0V to +VCC +2.0V
VCC with Respect to Ground ............... 2.0V to +7.0V
Package Power Dissipation
Capability (TA = 25°C) ........................................ 1.0W
Lead Soldering Temperature (10 secs) ............. 300°C
Output Short Circuit Current(2) ........................ 100 mADescription
The CAT1024 is a complete memory and supervisory solution for microcontroller-based systems. A 2k-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 400kHz I²C bus.
The CAT1024 provides a precision VCC sense circuit, but has only a RESET output and does not have a Write Protect input.
The power supply monitor and reset circuit CAT1024 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 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 CAT1024 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.
CAT1024 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 maximum. TDFN footprint is 3x3mm.
The CAT1024 and CAT1025 are complete memory andsupervisory solutions for microcontroller-based systems.A 2k-bit serial EEPROM memory and a system powersupervisor with brown-out protection are integratedtogether in low power CMOS technology. Memoryinterface is via a 400kHz I2C bus
The CAT1025 provides a precision VCC sense circuitand two open drain outputs: one (RESET) drives highand the other (RESET) drives low whenever VCC fallsbelow the reset threshold voltage. The CAT1025 alsohas a Write Protect input (WP). Write operations aredisabled if WP is connected to a logic high.The CAT1024 also provides a precision VCCsensecircuit, but has only a RESET output and does not havea Write Protect input.
The power supply monitor and reset circuit CAT1024 protectmemory and system controllers during power up/downand against brownout conditions. Five resetthresholdvoltages support 5V, 3.3V and 3V systems. If power supplyvoltages are out of tolerance reset signals become active,preventing the systemmicrocontroller, ASIC or peripheralsfrom operating. Reset signals become inactive typically 200ms after the supply voltage exceeds the reset thresholdlevel. With both active high and low reset signals, interfaceto microcontrollers and other ICs is simple. In addition, theRESET pin or a separate input, MR, can be used as an input for push-button manual reset capability.
The CAT1024/25 memory features a 16-byte page. Inaddition, hardware data protection is provided by a VCCsense circuit that prevents writes to memory whenever VCCfalls below the reset threshold or until VCC reaches the resetthreshold during power up. Available packages include an 8-pin DIP, 8-pin SOIC, 8-pinTSSOP, 8-pin TDFN and 8-pin MSOP. The TDFN packagethickness is 0.8mm maximum. TDFN footprint is 3x3mm.
CAT1024 Data Sheet
