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CAT1024LI-28TE13 Datasheet

  • CAT1024LI-28TE13

  • Supervisory Circuits with I2C Serial 2k-bit CMOS EEPROM and ...

  • 20頁

  • CATALYST

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Preliminary Information
CAT1024, CAT1025
Supervisory Circuits with I
2
C Serial 2k-bit CMOS EEPROM and Manual Reset
FEATURES
鈻?/div>
Precision power supply voltage monitor
鈻?/div>
16-Byte page write buffer
H
GEN
FR
ALO
EE
LE
A
D
F
R
E
E
TM
鈥?5V, 3.3V and 3V systems
鈥?Five threshold voltage options
鈻?/div>
Active high or low reset
鈻?/div>
Built-in inadvertent write protection
鈥?WP pin (CAT1025)
鈻?/div>
1,000,000 Program/Erase cycles
鈻?/div>
Manual reset input
鈻?/div>
100 year data retention
鈻?/div>
8-pin DIP, SOIC, TSSOP, MSOP &
鈥?Valid reset guaranteed at V
CC
= 1V
鈻?/div>
400kHz I
2
C bus
鈻?/div>
3.0V to 5.5V operation
鈻?/div>
Low power CMOS technology
TDFN (3x3mm foot print) packages
鈻?/div>
Industrial and extended temperature ranges
DESCRIPTION
voltages support 5V, 3.3V and 3V 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 200
ms after the supply voltage exceeds the reset threshold
level. With both active high and low reset signals, interface
to microcontrollers and other ICs is simple. In addition, the
The CAT1025 provides a precision V
CC
sense circuit
RESET
pin or a separate input,
MR,
can be used as an input
and two open drain outputs: one (RESET) drives high for push-button manual reset capability.
and the other (RESET) drives low whenever V
CC
falls
below the reset threshold voltage. The CAT1025 also The CAT1024/25 memory features a 16-byte page. In
has a Write Protect input (WP). Write operations are addition, hardware data protection is provided by a V
CC
sense circuit that prevents writes to memory whenever V
CC
disabled if WP is connected to a logic high.
falls below the reset threshold or until V
CC
reaches the reset
The CAT1024 also provides a precision V
CC
sense threshold during power up.
circuit, but has only a
RESET
output and does not have
Available packages include an 8-pin DIP, 8-pin SOIC, 8-pin
a Write Protect input.
TSSOP, 8-pin TDFN and 8-pin MSOP. The TDFN package
The power supply monitor and reset circuit protect thickness is 0.8mm maximum. TDFN footprint is 3x3mm.
memory and system controllers during power up/down
and against brownout conditions. Five reset threshold
The CAT1024 and CAT1025 are complete memory and
supervisory solutions for microcontroller-based systems.
A 2k-bit serial EEPROM memory and a system power
supervisor with brown-out protection are integrated
together in low power CMOS technology. Memory
interface is via a 400kHz I
2
C bus.
PIN CONFIGURATION
DIP Package (P, L)
SOIC Package (J, W)
TSSOP Package (U, Y)
MSOP Package (R, Z)
MR
1
RESET
2
NC 3
VSS 4
CAT1024
8 VCC
7 NC
6 SCL
5 SDA
(Bottom View)
TDFN Package: 3mm x 3mm
0.8mm maximum height - (RD4, ZD4)
VCC
NC
SCL
SDA
8
7
6
5
1
2
MR
RESET
NC
VSS
CAT1024
3
4
MR
1
RESET
2
RESET 3
VSS 4
CAT1025
8 VCC
7 WP
6 SCL
5 SDA
VCC
8
WP
7
SCL
6
SDA
5
1
MR
2
RESET
CAT1025
3
RESET
4
V
SS
漏 2004 by Catalyst Semiconductor, Inc.
Characteristics subject to change without notice
Doc No. 3008, Rev. M

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