CAT13008 Datasheet, PDF (1/14 Pages) Catalyst Semiconductor – Voltage Supervisor with Microwire Serial CMOS EEPROM

CAT130xx
Voltage Supervisor with Microwire 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 = 1 V
„ High Speed Operation
„ Selectable x8 or x16 memory organization
„ 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 13.
PIN CONFIGURATION
SOIC (W)
CS 1
SK 2
DI 3
DO 4
8 V_CC
7 RST/ R¯¯S¯T¯
6 ORG
5 GND
DESCRIPTION
The CAT130xx (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
Microwire serial protocol.
The CAT130xx 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
13001
13004
13008
13016
Memory density
1-Kbit
4-Kbit
8-Kbit
16-Kbit
PIN FUNCTION
Pin Name
CS
SK
DI
DO
GND
ORG
RST/ R¯¯S¯T¯
V_CC
Function
Chip Select
Clock Input
Serial Data Input
Serial Data Output
Ground
Memory Organization
Reset Output
Power Supply
Note:
When the ORG pin is connected to V_CC, the x16 organization is
selected. When it is connected to ground, the x8 pin is selected. If
the ORG pin is left unconnected, then an internal pullup device will
select the x16 organization.
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.
1
Characteristics subject to change without notice
Doc. No. 1121 Rev. A