Datasheet > CAT1021LI-30T2

CAT1021LI-30T2

更新时间： 2024-11-23 05:17:19

品牌	Logo	应用领域
CATALYST		监控可编程只读存储器电动程控只读存储器电可擦编程只读存储器
页数	文件大小	规格书
21页	278K
描述
Supervisory Circuits with I2C Serial 2k-bit CMOS EEPROM, Manual Reset and Watchdog Timer

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CAT1021LI-30T2 数据手册

CAT1021, CAT1022, CAT1023

Supervisory Circuits with I²C Serial 2k-bit CMOS

EEPROM, Manual Reset and Watchdog Timer

FEATURES

DESCRIPTION

The CAT1021, CAT1022 and CAT1023 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 I²C bus.

ꢀ Precision Power Supply Voltage Monitor

— 5V, 3.3V and 3V systems

— Five threshold voltage options

ꢀ Watchdog Timer

ꢀ Active High or Low Reset

— Valid reset guaranteed at V_CC= 1V

ꢀ 400kHz I²C Bus

The CAT1021 and CAT1023 provide a precision V_CC

sense circuit and two open drain outputs: one (RESET)

¯¯¯¯¯¯

drives high and the other (RESET) drives low whenever

ꢀ 2.7V to 5.5V Operation

V_CCfalls below the reset threshold voltage. The

ꢀ Low power CMOS technology

ꢀ 16-Byte Page Write Buffer

ꢀ Built-in inadvertent write protection

— WP pin (CAT1021)

¯¯¯¯¯¯

CAT1022 has only a RESET output and does not have

a Write Protect input. The CAT1021 also has a Write

Protect input (WP). Write operations are disabled if WP

is connected to a logic high.

All supervisors have a 1.6 second watchdog timer circuit

that resets a system to a known state if software or a

hardware glitch halts or “hangs” the system. For the

CAT1021 and CAT1022, the watchdog timer monitors

the SDA signal. The CAT1023 has a separate watchdog

timer interrupt input pin, WDI.

ꢀ 1,000,000 Program/Erase cycles

ꢀ Manual Reset Input

ꢀ 100 year data retention

ꢀ Industrial and extended temperature ranges

ꢀ 8-pin DIP, SOIC, TSSOP, MSOP or TDFN

The power supply monitor and reset circuit protect

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 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

(3 x 3 mm foot-print) packages

— TDFN max height is 0.8mm

¯¯¯¯¯¯

other ICs is simple. In addition, the RESET pin or a

¯¯¯

separate input, MR, can be used as an input for push-

For Ordering Information details, see page 19.

button manual reset capability.

The on-chip, 2k-bit EEPROM memory features a 16-byte

page. In addition, hardware data protection is provided

by a V_CCsense circuit that prevents writes to memory

whenever V_CCfalls below the reset threshold or until V_CC

reaches the reset threshold during power up.

Available packages include an 8-pin DIP and surface

mount 8-pin SO, 8-pin TSSOP, 8-pin TDFN and 8-pin

MSOP packages. The TDFN package thickness is

0.8mm maximum. TDFN footprint options are 3x3mm.

Characteristics subject to change without notice

Doc. No. 3009 Rev. L

12 3 4 5 6 7...21

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与CAT1021LI-30T2相关器件

型号	品牌	获取价格	描述	数据表
CAT1021LI-30-T2	CATALYST	获取价格	Supervisory Circuits with I2C Serial 2k-bit CMOS EEPROM, Manual Reset and Watchdog Timer
CAT1021LI-30T3	CATALYST	获取价格	Supervisory Circuits with I2C Serial 2k-bit CMOS EEPROM, Manual Reset and Watchdog Timer
CAT1021LI-30-T3	CATALYST	获取价格	Supervisory Circuits with I2C Serial 2k-bit CMOS EEPROM, Manual Reset and Watchdog Timer
CAT1021LI-30TE13	CATALYST	获取价格	Supervisory Circuits with I2C Serial 2k-bit CMOS EEPROM, Manual Reset and Watchdog Timer
CAT1021LI-30TE13	ONSEMI	获取价格	1-CHANNEL POWER SUPPLY MANAGEMENT CKT, PDIP8, LEAD AND HALOGEN FREE, PLASTIC, DIP-8
CAT1021LI42	ONSEMI	获取价格	1-CHANNEL POWER SUPPLY MANAGEMENT CKT, PDIP8, 0.300 INCH, HALOGEN FREE AND ROHS COMPLIANT,
CAT1021LI-42	CATALYST	获取价格	Supervisory Circuits with I2C Serial 2k-bit CMOS EEPROM, Manual Reset and Watchdog Timer
CAT1021LI-42	ONSEMI	获取价格	1-CHANNEL POWER SUPPLY MANAGEMENT CKT, PDIP8, 0.300 INCH, HALOGEN FREE AND ROHS COMPLIANT,
CAT1021LI-42-G	ONSEMI	获取价格	Supervisory Circuits with I2C Serial 2k-bit CMOS
CAT1021LI-42-GT2	CATALYST	获取价格	Supervisory Circuits with I2C Serial 2k-bit CMOS EEPROM, Manual Reset and Watchdog Timer

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