CAT15002 Datasheet, PDF (1/15 Pages) Catalyst Semiconductor – Voltage Supervisor with 2-Kb and 4-Kb SPI Serial CMOS EEPROM

CAT15002, CAT15004
Voltage Supervisor with 2-Kb and 4-Kb SPI
Serial CMOS EEPROM
FEATURES
„ Precision Power Supply Voltage Monitor
ƒ 5V, 3.3V, 3V & 2.5V systems
ƒ 7 threshold voltage options
„ Active High or Low Reset
ƒ Valid reset guaranteed at V_CC = 1V
„ 10MHz SPI compatible
„ 16-byte page write buffer
„ Low power CMOS technology
„ 1,000,000 Program/Erase cycles
„ 100 year data retention
„ Industrial temperature range
„ RoHS-compliant 8-pin SOIC package
For Ordering Information details, see page 14.
PIN CONFIGURATION
SOIC (W)
C¯¯S 1
SO 2
¯W¯P¯ 3
8 V_CC
7 RST/¯R¯S¯T¯
6 SCK
V_SS 4
5 SI
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 V_CC sense
circuit with two reset output options: CMOS active low
output or CMOS active high. The RESET output is
active whenever V_CC 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
become active, preventing the system microcontroller,
ASIC or peripherals from operating. Reset signals
become inactive typically 240ms after the supply
voltage exceeds the reset threshold level.
MEMORY SIZE SELECTOR
Product
15002
15004
Memory density
2-Kbit
4-Kbit
PIN FUNCTION
Pin Name
C¯¯S
SO
¯W¯P¯
V_SS
SI
SCK
RST/¯R¯S¯T¯
V_CC
Function
Chip Select
Serial Data Output
Write Protect
Ground
Serial Data Input
Serial Clock Input
Reset Output
Power Supply
© 2007 Catalyst Semiconductor, Inc.
Characteristics subject to change without notice
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
1
Doc. No. 1126 Rev. A