Datasheet > CAT1021RD2A-42

CAT1021RD2A-42

更新时间： 2024-11-08 09:11:51

品牌	Logo	应用领域
CATALYST		/
页数	文件大小	规格书
17页	108K
描述
Power Management Circuit

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中文翻译

获取价格

数据手册

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CAT1021RD2A-42 数据手册

Preliminary Information

CAT1021, CAT1022, CAT1023

Supervisory Circuits with I²C Serial 2K CMOS EEPROM, Manual Reset

and Watchdog Timer

FEATURES

■ Precision power supply voltage monitor

— 5V, 3.3V and 3V systems

— Five threshold voltage options

■ Watchdog timer

■ Built-in inadvertent write protection

— WP pin (CAT1021)

■ 1,000,000 Program/Erase cycles

■ Manual reset input

■ Active high or low reset

— Valid reset guaranteed at V_CC=1V

■ 400kHz I²C bus

■ 100 year data retention

■ 8-pin DIP, SOIC, TSSOP, TDFN (MSOP

(3x4.9mm) & 3x3mm foot prints) or MSOP

packages

■ 2.7V to 5.5V operation

— TDFN max height is 0.8mm

■ Low power CMOS technology

■ 16-Byte page write buffer

■ Automotive, extended automotive and

industrial temperature ranges

DESCRIPTION

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

systemmicrocontroller, ASICorperipheralsfromoperating.

Reset signals become inactive typically 200 ms after the

supply voltage exceeds the reset threshold level. With both

activehighandlowresetsignals,interfacetomicrocontrollers

and 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.

The CAT1021, CAT1022 and CAT1023 are complete

memory and supervisory solutions for microcontroller-

based systems. A 2kbit 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.

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

V_CCfallsbelowtheresetthresholdvoltage.TheCAT1021

also has a Write Protect input (WP). Write operations

are disabled if WP is connected to a logic high.

Theon-chip, 2kEEPROMmemoryfeaturesa16-bytepage.

In addition, hardware data protection is provided by a V_CC

sense circuit that prevents writes to memory whenever V_CC

falls below the reset threshold or until V_CCreaches the reset

threshold during power up.

The CAT1022 has a RESET output and does not have

a Write Protect input.

Allsupervisorshavea1.6secondwatchdogtimercircuit

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

theSDAsignal.TheCAT1023hasaseparatewatchdog

timer interrupt input pin, WDI.

Availablepackagesincludean8-pinDIPand surfacemount

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

packages.TheTDFNpackagethicknessis0.8mmmaximum.

TDFN footprint options are 3x3mm or 3x4.9mm (MSOP pad

layout).

Doc No. 3009, Rev. E

Characteristics subject to change without notice

12 3 4 5 6 7...17

中文翻译

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与CAT1021RD2A-42相关器件

型号	品牌	获取价格	描述	数据表
CAT1021RD2A-45	CATALYST	获取价格	Power Management Circuit
CAT1021RD2A-45TE13	ONSEMI	获取价格	1-CHANNEL POWER SUPPLY MANAGEMENT CKT, DSO8, 3 X 4.90 MM, 0.80 MM HEIGHT, EXPOSED PAD, MSO
CAT1021RD2A-45TE13	CATALYST	获取价格	Power Supply Management Circuit, Fixed, 1 Channel, CMOS, 3 X 4.90 MM, 0.80 MM HEIGHT, EXPO
CAT1021RD2E-25TE13	ONSEMI	获取价格	1-CHANNEL POWER SUPPLY MANAGEMENT CKT, DSO8, 3 X 4.90 MM, 0.80 MM HEIGHT, MO-229, TDFN-8
CAT1021RD2E-25TE13	CATALYST	获取价格	Power Supply Management Circuit, Fixed, 1 Channel, CMOS, 3 X 4.90 MM, 0.80 MM HEIGHT, MO-2
CAT1021RD2E-28	CATALYST	获取价格	Power Supply Management Circuit, Fixed, 1 Channel, CMOS, 3 X 4.90 MM, 0.80 MM HEIGHT, MO-2
CAT1021RD2E-28TE13	CATALYST	获取价格	Power Supply Management Circuit, Fixed, 1 Channel, CMOS, 3 X 4.90 MM, 0.80 MM HEIGHT, MO-2
CAT1021RD2E-30TE13	ONSEMI	获取价格	1-CHANNEL POWER SUPPLY MANAGEMENT CKT, DSO8, 3 X 4.90 MM, 0.80 MM HEIGHT, MO-229, TDFN-8
CAT1021RD2E-42TE13	CATALYST	获取价格	Power Supply Management Circuit, Fixed, 1 Channel, CMOS, 3 X 4.90 MM, 0.80 MM HEIGHT, MO-2
CAT1021RD2E-45TE13	ONSEMI	获取价格	1-CHANNEL POWER SUPPLY MANAGEMENT CKT, DSO8, 3 X 4.90 MM, 0.80 MM HEIGHT, MO-229, TDFN-8

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