CAT140xx
Voltage Supervisor with I
2
C Serial
CMOS EEPROM
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 V
CC
= 1 V
Supports Standard and Fast I
2
C Protocol
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
DESCRIPTION
The CAT140xx (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 both the standard
(100kHz) as well as fast (400kHz) I
2
C protocol.
The CAT140xx 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.
PIN CONFIGURATION
SOIC (W)
CAT14016 / 08 / 04 / 02
NC / NC / NC / A
0
NC / NC / A
1
/ A
1
NC / A
2
/ A
2
/ A
2
1
2
3
8
7
6
5
V
CC
RST/RST
SCL
SDA
MEMORY SIZE SELECTOR
Product
14002
14004
14008
14016
Memory density
2-Kbit
4-Kbit
8-Kbit
16-Kbit
V
SS
4
PIN FUNCTION
Pin Name
A0, A1, A2
SDA
SCL
¯¯¯¯
RST/RST
V
CC
V
SS
NC
Function
Device Address Inputs
Serial Data Input/Output
Serial Clock Input
Reset Output
Power Supply
Ground
No Connect
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
© 2006 Catalyst Semiconductor, Inc.
Characteristics subject to change without notice
1
Doc. No. 1117 Rev. A
CATALYST [ CATALYST SEMICONDUCTOR ]
