Datasheet > 存储 > EEPROM> CAT1021YI-30-T3

CAT1021YI-30-T3

更新时间： 2024-02-15 10:11:28

品牌	Logo	应用领域
CATALYST		存储内存集成电路光电二极管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	203K
描述
Supervisory Circuits with I2C Serial 2k-bit CMOS EEPROM, Manual Reset and Watchdog Timer

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CAT1021YI-30-T3 技术参数

是否Rohs认证：	符合	生命周期：	Obsolete
包装说明：	TSSOP, TSSOP8,.25	Reach Compliance Code：	unknown
风险等级：	5.8	Is Samacsys：	N
数据保留时间-最小值：	100	耐久性：	1000000 Write/Erase Cycles
I2C控制字节：	1010000R	JESD-30 代码：	R-PDSO-G8
JESD-609代码：	e3	内存密度：	2048 bit
内存集成电路类型：	EEPROM	内存宽度：	8
端子数量：	8	字数：	256 words
字数代码：	256	最高工作温度：	85 °C
最低工作温度：	-40 °C	组织：	256X8
封装主体材料：	PLASTIC/EPOXY	封装代码：	TSSOP
封装等效代码：	TSSOP8,.25	封装形状：	RECTANGULAR
封装形式：	SMALL OUTLINE, THIN PROFILE, SHRINK PITCH	并行/串行：	SERIAL
电源：	3.3 V	认证状态：	Not Qualified
串行总线类型：	I2C	最大待机电流：	0.00006 A
子类别：	EEPROMs	最大压摆率：	0.003 mA
标称供电电压 (Vsup)：	3.3 V	表面贴装：	YES
技术：	CMOS	温度等级：	INDUSTRIAL
端子面层：	Tin (Sn)	端子形式：	GULL WING
端子节距：	0.635 mm	端子位置：	DUAL
写保护：	HARDWARE	Base Number Matches：	1

CAT1021YI-30-T3 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

— 5V, 3.3V and 3V systems

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.

— 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 3mm 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-

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. M

12 3 4 5 6 7...21

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