CAT15002 Datasheet | Catalyst Semiconductor

FEATURES - Precision Power Supply Voltage Monitor - 5V, 3.3V, 3V & 2.5V systems - 7 threshold voltage options - Active High or Low Reset - Valid reset guaranteed at VCC = 1V - 10MHz SPI patible - 16-byte page write buffer - Low power CMOS technology - 1,000,000 Program/Erase cycles - 100 year data retention - Industrial temperature range - Ro HS-pliant 8-pin SOIC package For Ordering Information details, see page 14. DESCRIPTION The CAT15002/04 (see table below) are memory and supervisory solutions for microcontroller based systems. A CMOS serial EEPROM memory and a system power supervisor with brown-out protection are integrated together. Memory interface is via SPI bus serial interface. The CAT15002/04 provides a precision VCC sense circuit with two reset output options: CMOS active low output or CMOS active high. The RESET output is active whenever VCC is below the reset threshold or falls below the reset threshold voltage. The power supply monitor and reset circuit protect system controllers during power up/down and against brownout conditions. Seven reset threshold voltages support 5V, 3.3V, 3V and 2.5V systems. If power supply voltages are out of tolerance reset signals bee active, preventing the system microcontroller, ASIC or peripherals from operating. Reset signals bee inactive typically 240ms after the supply voltage exceeds the reset threshold level. PIN CONFIGURATION SOIC (W) ¯¯ CS SO ¯¯¯ WP VSS 1 2 3 4 8 VCC 7 RST/¯¯¯¯ RST 6 SCK 5 SI MEMORY SIZE SELECTOR Product 15002 15004 Memory density 2-Kbit 4-Kbit PIN FUNCTION Pin Name ¯¯ CS SO ¯¯¯ WP VSS SI SCK ¯¯¯¯ RST/RST VCC Function Chip Select Serial Data Output Write Protect Ground Serial Data Input Serial Clock Input Reset Output Power Supply THRESHOLD SUFFIX SELECTOR Nominal Threshold Voltage 4.63V 4.38V 4.00V 3.08V 2.93V 2.63V 2.32V Threshold Suffix Designation L M J T S R Z © 2007 Catalyst Semiconductor, Inc. Characteristics subject to change without notice Doc. No. 1126 Rev. A .. CAT15002,...