CAT1021WI-45-GT3

更新时间： 2024-11-15 12:33:47

品牌	Logo	应用领域
安森美 - ONSEMI		监控
页数	文件大小	规格书
21页	200K
描述
Supervisory Circuits with I2C Serial 2k-bit CMOS

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数据手册
替代型号

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CAT1021WI-45-GT3 数据手册

CAT1021, CAT1022, CAT1023

Supervisory Circuits with I²C Serial 2k-bit CMOS

EEPROM, Manual Reset and Watchdog Timer

FEATURES

DESCRIPTION

ꢀ Precision Power Supply Voltage Monitor

— 5 V, 3.3 V and 3 V systems

— Five threshold voltage options

ꢀ Watchdog Timer

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 400 kHz I²C bus.

ꢀ Active High or Low Reset

— Valid reset guaranteed at V_CC= 1 V

ꢀ 400 kHz 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

ꢀ 2.7 V to 5.5 V 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 5 V, 3.3 V and 3 V 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 0.8 mm

¯¯¯¯¯¯

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

¯¯¯

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

button manual reset capability.

For Ordering Information details, see page 19.

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 3 x 3mm.

Characteristics subject to change without notice

Doc. No. MD-3009 Rev. P

12 3 4 5 6 7...21

中文翻译

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CAT1021WI-45-GT3 替代型号

型号	品牌	替代类型	描述	数据表
CAT1022WI-45-GT3	ONSEMI	完全替代	EEPROM 串行 2-Kb CPU 监督器
CAT1023WI-45-GT3	ONSEMI	完全替代	EEPROM 串行 2-Kb CPU 监督器
CAT1021WI-42-GT3	ONSEMI	类似代替	Supervisory Circuits with I2C Serial 2k-bit CMOS

与CAT1021WI-45-GT3相关器件

型号	品牌	获取价格	描述	数据表
CAT1021WI-45T2	CATALYST	获取价格	Supervisory Circuits with I2C Serial 2k-bit CMOS EEPROM, Manual Reset and Watchdog Timer
CAT1021WI-45-T2	CATALYST	获取价格	Supervisory Circuits with I2C Serial 2k-bit CMOS EEPROM, Manual Reset and Watchdog Timer
CAT1021WI-45T3	CATALYST	获取价格	Supervisory Circuits with I2C Serial 2k-bit CMOS EEPROM, Manual Reset and Watchdog Timer
CAT1021WI-45-T3	CATALYST	获取价格	Supervisory Circuits with I2C Serial 2k-bit CMOS EEPROM, Manual Reset and Watchdog Timer
CAT1021WI-45TE13	CATALYST	获取价格	Supervisory Circuits with I2C Serial 2k-bit CMOS EEPROM, Manual Reset and Watchdog Timer
CAT1021WI-45TE13	ONSEMI	获取价格	1-CHANNEL POWER SUPPLY MANAGEMENT CKT, PDSO8, LEAD AND HALOGEN FREE, SOIC-8
CAT1021YE-25TE13	CATALYST	获取价格	Supervisory Circuits with I2C Serial 2k-bit CMOS EEPROM, Manual Reset and Watchdog Timer
CAT1021YE-25TE13	ONSEMI	获取价格	1-CHANNEL POWER SUPPLY MANAGEMENT CKT, PDSO8, LEAD AND HALOGEN FREE, TSSOP-8
CAT1021YE-28	CATALYST	获取价格	Power Supply Management Circuit, Fixed, 1 Channel, CMOS, PDSO8, LEAD AND HALOGEN FREE, TSS
CAT1021YE-28	ONSEMI	获取价格	1-CHANNEL POWER SUPPLY MANAGEMENT CKT, PDSO8, LEAD AND HALOGEN FREE, TSSOP-8

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