CPU Supervisor with 4K SPI EEPROM

These devices combine four popular functions, Power-on Reset Control, Watchdog Timer, Supply Voltage Supervision, and Block Lock Protect Serial EEPROM Memory in one package. This combination lowers system cost, reduces board space requirements, and increases reliability.

Features

•Low VCCDetection and Reset Assertion

- Four standard reset threshold voltages 4.63V, 4.38V, 2.93V, 2.63V

- Re-program low VCCreset threshold voltage using special programming sequence.

- Reset signal valid to VCC= 1V

• Selectable Time Out Watchdog Timer

• Long Battery Life with Low Power Consumption

- <50µA max standby current, watchdog on

- <10µA max standby current, watchdog off

• 4Kbits of EEPROM–1M Write Cycle Endurance

• Save Critical Data with Block Lock™Memory

- Protect 1/4, 1/2, all or none of EEPROM array

• Built-in Inadvertent Write Protection

- Write enable latch

- Write protect pin

• SPI Interface - 3.3MHz Clock Rate

• Minimize Programming Time

- 16-byte page write mode

- 5ms write cycle time (typical)

• Available Packages

- 8 Ld MSOP, 8 Ld SOIC, 8 Ld PDIP

- 14 Ld TSSOP

• Pb-Free Plus Anneal Available (RoHS Compliant)

Applications

• Communications Equipment

- Routers, Hubs, Switches

- Set Top Boxes

• Industrial Systems

- Process Control

- Intelligent Instrumentation

• Computer Systems

- Desktop Computers

- Network Servers

• Battery Powered Equipment