Datasheet > X1287S14I-2.7

X1287S14I-2.7

更新时间： 2024-11-20 05:11:31

品牌	Logo	应用领域
瑞萨 - RENESAS		光电二极管
页数	文件大小	规格书
26页	303K
描述
Real Time Clock, Volatile, CMOS, PDSO14, PLASTIC, SOIC-14

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中文翻译

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数据手册

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X1287S14I-2.7 数据手册

Preliminary Information

256K

2-Wire^™RTC

X1287

Real Time Clock/Calendar/CPU Supervisor with EEPROM

FEATURES

DESCRIPTION

• Selectable Watchdog Timer (0.25,s 0.75s, 1.75s, off)

• Power On Reset (250ms)

• Low Voltage Reset

The X1287 is a Real Time Clock with clock/calendar

CPU Supervisor circuits and two polled alarms. The dual

port clock and alarm registers allow the clock to oper-

ate, without loss of accuracy, even during read and

write operations.

• 2 Polled Alarms

—Settable on the Second, 10s of Seconds,

Minute, 10s of Minutes, Hour, Day, Month, or

Day of the Week

The clock/calendar provides functionality that is con-

trollable and readable through a set of registers. The

clock, using a low cost 32.768kHz crystal input, accu-

rately tracks the time in seconds, minutes, hours, date,

day, month and years. It has leap year correction,

automatic adjustment for the year 2000 and months

with less than 31 days.

• 2 Wire Interface interoperable with I²C.

—400kHz data transfer rate

• Secondary Power Supply Input with internal

switch-over circuitry.

• Year 2000 Compliant RTC

• 32K x 8 Bits of EEPROM

—64 Byte Page Write Mode

—3 bit Block Lock

• Low Power CMOS

—<1µA Operating Current

—<3mA Active Current - EEPROM Program

—<400µA Active Current - EEPROM Read

• Single Byte Write Capability

• Typical Nonvolatile Write Cycle Time: 5ms

• High Reliability

—100,000 Endurance Cycles

—Guaranteed Data Retention: 100 Years

• Small Package Options

The X1287 provides a watchdog timer with 3 selectable

timeout periods and off. The watchdog activates a

RESET pin when it expires. The reset also goes active

when Vcc drops below a ﬁxed trip point. There are two

alarms where a match is monitored by polling status bits.

The device offers a backup power input pin. This Vback

pin allows the device to be backed up by a non-

rechargeable battery. The RTC is fully operational from

1.8 to 6 volts.

The X1287 provides a 256K bits EEPROM array, giv-

ing a safe, secure memory for critical user and conﬁgura-

tion data. This memory is unaffected by complete

failure of the main and backup supplies.

—14-Lead SOIC, 14-Lead TSSOP

BLOCK DIAGRAM

Timer

Calendar

Logic

Frequency

Divider

1Hz

Time

Keeping

Registers

32.768kHz

Oscillator

(SRAM)

Serial

Interface

Decoder

Control/

Status

Control

Decode

Logic

Compare

Registers

SCL

SDA

Alarm

(EEPROM)

(SRAM)

Alarm Regs

(EEPROM)

256K

EEPROM

ARRAY

Watchdog

Timer

Low Voltage

Reset

RESET

Xicor, Inc. 2000 Patents Pending

9900-3021.1 3/28/01 EP

Characteristics subject to change without notice. 1 of 26

12 3 4 5 6 7...26

中文翻译

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与X1287S14I-2.7相关器件

型号	品牌	获取价格	描述	数据表
X1287S14I-4.5A	RENESAS	获取价格	Real Time Clock, Volatile, CMOS, PDSO14, PLASTIC, SOIC-14
X1287V14	RENESAS	获取价格	REAL TIME CLOCK, PDSO14, PLASTIC, TSSOP-14
X1287V14	XICOR	获取价格	Real Time Clock, Volatile, CMOS, PDSO14, PLASTIC, TSSOP-14
X1287V14-2.7	RENESAS	获取价格	REAL TIME CLOCK, PDSO14, PLASTIC, TSSOP-14
X1287V14-2.7A	RENESAS	获取价格	Real Time Clock, Volatile, CMOS, PDSO14, PLASTIC, TSSOP-14
X1288	INTERSIL	获取价格	2-Wire⑩ RTC Real Time Clock/Calendar/CPU Supe
X1288	XICOR	获取价格	2-Wire RTC Real Time Clock/Calendar/CPU Supervisor with EEPROM
X1288S16	INTERSIL	获取价格	2-Wire⑩ RTC Real Time Clock/Calendar/CPU Supe
X1288S16	XICOR	获取价格	2-Wire RTC Real Time Clock/Calendar/CPU Supervisor with EEPROM
X1288S16-2.7	XICOR	获取价格	2-Wire RTC Real Time Clock/Calendar/CPU Supervisor with EEPROM

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