Datasheet > X1242V8I-2.7A

X1242V8I-2.7A

更新时间： 2024-01-30 02:12:56

品牌	Logo	应用领域
瑞萨 - RENESAS		时钟光电二极管外围集成电路
页数	文件大小	规格书
24页	148K
描述
0 TIMER(S), REAL TIME CLOCK, PDSO8, PLASTIC, TSSOP-8

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X1242V8I-2.7A 技术参数

是否Rohs认证：	不符合	生命周期：	Obsolete
零件包装代码：	SOIC	包装说明：	PLASTIC, TSSOP-8
针数：	8	Reach Compliance Code：	not_compliant
ECCN代码：	EAR99	HTS代码：	8542.39.00.01
风险等级：	5.75	Is Samacsys：	N
最大时钟频率：	0.032 MHz	信息访问方法：	SERIAL, 2-WIRE/I2C
JESD-30 代码：	R-PDSO-G8	JESD-609代码：	e0
长度：	4.4 mm	端子数量：	8
计时器数量：		最高工作温度：	85 °C
最低工作温度：	-40 °C	封装主体材料：	PLASTIC/EPOXY
封装代码：	TSSOP	封装形状：	RECTANGULAR
封装形式：	SMALL OUTLINE, THIN PROFILE, SHRINK PITCH	峰值回流温度（摄氏度）：	240
认证状态：	Not Qualified	座面最大高度：	1.2 mm
最大供电电压：	3.6 V	最小供电电压：	2.7 V
标称供电电压：	3 V	表面贴装：	YES
技术：	CMOS	温度等级：	INDUSTRIAL
端子面层：	Tin/Lead (Sn/Pb)	端子形式：	GULL WING
端子节距：	0.65 mm	端子位置：	DUAL
处于峰值回流温度下的最长时间：	NOT SPECIFIED	宽度：	3 mm
uPs/uCs/外围集成电路类型：	TIMER, REAL TIME CLOCK	Base Number Matches：	1

X1242V8I-2.7A 数据手册

Preliminary Information

16k (2k x 8)

2-Wire^™RTC

X1242

Real Time Clock/Calendar/Alarms/CPU Supervisor with EEPROM

FEATURES

DESCRIPTION

• Selectable watchdog timer (0.25s, 0.75s, 1.75s, off)

• Power on reset (250ms)

• Programmable low voltage reset

• 2 polled alarms

The X1242 is a Real Time Clock with calendar/CPU

supervisor circuits and two polled alarms. The dual port

clock and alarm registers allow the clock to operate,

without loss of accuracy, even during read and write

operations.

—Settable on the second, 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 and

automatic adjustment for 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

• 2Kbytes of EEPROM

—64-byte page write mode

—3-bit Block Lock^™protection

• Low power CMOS

The X1242 provides a watchdog timer with 3 selectable

time out periods and off. The watchdog activates a

RESET pin when it expires. The reset also goes active

—<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

when V

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 V

BACK

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

rechargeable battery. The RTC is fully operational from

1.8 to 5.5 volts.

• Small package options

—8-lead SOIC package, 8-lead TSSOP package

The X1242 provides a 2Kbyte EEPROM array, giving a

safe, secure memory for critical user and conﬁguration

data. This memory is unaffected by complete failure of

the main and backup supplies.

BLOCK DIAGRAM

Timer

Calendar

Logic

Frequency

Divider

1Hz

32.768kHz

Oscillator

Time

Keeping

Registers

(SRAM)

Control

Decode

Logic

Control/

Status

Compare

Serial

Interface

Decoder

SCL

SDA

Alarm

Registers

(EEPROM)

(SRAM)

Alarm Regs

(EEPROM)

16k (2k x 8)

EEPROM

Array

Watchdog

Timer

Low Voltage

Reset

RESET

Characteristics subject to change without notice. 1 of 24

REV 1.1.7 5/31/01

www.xicor.com

12 3 4 5 6 7...24

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