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CAT1320ZD2I-30SOIC Datasheet

  • CAT1320ZD2I-30SOIC

  • Supervisory Circuits with I2C Serial 32K CMOS EEPROM

  • 18頁

  • CATALYST

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CAT1320, CAT1321
Supervisory Circuits with I
2
C Serial 32K CMOS EEPROM
FEATURES
I
Precision power supply voltage monitor
I
3.0V to 5.5V operation
I
Low power CMOS technology
I
64-Byte page write buffer
I
1,000,000 Program/Erase cycles
I
100 year data retention
H
GEN
FR
ALO
EE
LE
A
D
F
R
E
E
TM
鈥?5V, 3.3V and 3V systems
- +5.0V (+/- 5%, +/- 10%)
- +3.3V (+/- 5%, +/- 10%)
- +3.0V (+/- 10%)
I
Active low reset, CAT1320
I
Active high reset, CAT1321
I
Valid reset guaranteed at V
CC
=1V
I
400kHz I
2
C bus
I
8-pin DIP, SOIC, TSSOP and TDFN packages
I
Industrial temperature range
DESCRIPTION
The CAT1320 and CAT1321 are complete memory and
supervisory solutions for microcontroller-based systems.
A 32kbit 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.
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 options,
interface to microcontrollers and other ICs is simple. In
addition, the
RESET
(CAT1320) pin can be used as an
input for push-button manual reset capability.
The CAT1320 provides a precision V
CC
sense circuit
and drives an open drain output,
RESET
low whenever The CAT1320/21 memory features a 64-byte page. In
addition, hardware data protection is provided by a V
CC
V
CC
falls below the reset threshold voltage.
sense circuit that prevents writes to memory whenever V
CC
The CAT1321 provides a precision VCC sense circuit falls below the reset threshold or until V
CC
reaches the reset
that drives an open drain output, RESET high whenever threshold during power up.
V
CC
falls below the reset threshold voltage.
Available packages include an 8-pin DIP, SOIC, TSSOP
The power supply monitor and reset circuit protect and 4.9 x 3mm TDFN.
memory and system controllers during power up/down
and against brownout conditions. Five reset threshold
voltages support 5V, 3.3V and 3V systems. If power
supply voltages are out of tolerance reset signals become
PIN CONFIGURATION
PDIP (P, L) SOIC (J, W)
A0 1
A1 2
A2 3
VSS 4
A0 1
A1 2
A2 3
VSS 4
CAT1321
TSSOP (U, Y)
A0 1
A1 2
A2 3
VSS 4
CAT1320
8 VCC
7
RESET
6 SCL
5 SDA
TDFN PACKAGE: 4.9MM X 3MM
(RD2, ZD2)
A0
A1
A2
VSS
1
2
3
4
8
7
CAT1320
8 VCC
7
RESET
6 SCL
5 SDA
VCC
RESET
SCL
SDA
CAT1320
6
5
8 VCC
7 RESET
6 SCL
5 SDA
A0 1
A1 2
A2 3
VSS 4
CAT1321
8 VCC
7 RESET
6 SCL
5 SDA
A0
A1
A2
VSS
1
2
3
4
8
7
VCC
RESET
SCL
SDA
CAT1321
6
5
漏 2005 by Catalyst Semiconductor, Inc.
Characteristics subject to change without notice
1
Doc. No. 20585, Rev. 00

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