Datasheet > 存储 > EEPROM> X25045S-2.7T1

X25045S-2.7T1

更新时间： 2024-01-23 02:08:09

品牌	Logo	应用领域
XICOR		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光电二极管
页数	文件大小	规格书
15页	1032K
描述
EEPROM, 512X8, Serial, CMOS, PDSO8, PLASTIC, SOIC-8

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X25045S-2.7T1 数据手册

APPLICATION NOTES

A V A I L A B L E

AN11 • AN21

X25043/45

512 x 8 Bit

Programmable Watchdog Supervisory E²PROM

FEATURES

DESCRIPTION

The X25043/45 combines three popular functions,

Watchdog Timer, Voltage Supervision, and E²PROM in

a single package. This combination lowers the system

cost and reduces the board space requirements.

• Programmable Watchdog Timer

• Low V_CCDetection

• Reset Signal Valid to V_CC= 1V

• 1MHz Clock Rate

• 512 X 8 Bits Serial E²PROM

—4 Byte Page Mode

The Watchdog Timer provides an independent protec-

tionsystemformicrocontrollers.Duringasystemfailure,

the X25043/45 watchdog will respond with a RESET/

RESET signal after a selectable time-out interval. The

user selects the interval from three preset values. Once

selected, the interval does not change, even after cy-

cling the power.

• Low Power CMOS

—50µA Standby Current

—3mA Active Current

• 2.7V To 5.5V Power Supply

• Block Lock^TM

—Protect 1/4, 1/2 or all of E²PROM Array

• Built-in Inadvertent Write Protection

—Power-Up/Power-Down protection circuitry

—Write Latch

The system is protected from low voltage conditions by

the X25043/45 low V_CCdetection circuits. When V_CC

drops below the minimum V_CCtrip point, the system is

reset. Reset is asserted until V_CCreturns and stabilizes.

—Write Protect Pin

• High Reliability

ThememoryportionoftheX25043/45 isaCMOS4096-

bit serial E²PROM, internally organized as 512 X 8. The

X25043/45 features a Serial Peripheral Interface (SPI)

and software protocol allowing operation on a simple

three-wire bus.

—Endurance: 100,000 cycles per byte

—Data Retention: 100 Years

—ESD protection: 2000V on all pins

• Available Packages

—8-Lead PDlP

—8-Lead SOIC

—14-Lead TSSOP

TheX25043/45utilizesXicor’sproprietaryDirectWrite™

cell, providing a minimum endurance of 100,000 cycles

per byte and a minimum data retention of 100 years.

• X25043 = Active LOW RESET

• X25045 = Active HIGH RESET

DIE PHOTOGRAPH

PROGRAMMABLE

VOLTAGE

SENSOR

RESET

CONTROL

LOGIC

SERIAL

INTERFACE

LOGIC

4K BITS E PROM

HIGH VOLTAGE GENERATOR

AND

CONTROL

3844 ILL F01

Characteristics subject to change without notice

Direct Write™ is a trademark of Xicor, Inc.

©Xicor, Inc. 1994, 1995, 1996 Patents Pending

3844-6.5 2/24/99 T4/C2/D2 NS

12 3 4 5 6 7...15

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