Datasheet > X1241V8I-2.7

X1241V8I-2.7

更新时间： 2024-02-14 15:52:57

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
22页	195K
描述
0 TIMER(S), REAL TIME CLOCK, PDSO8, PLASTIC, TSSOP-8

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技术参数
数据手册

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X1241V8I-2.7 技术参数

是否Rohs认证：	不符合	生命周期：	Transferred
包装说明：	PLASTIC, TSSOP-8	Reach Compliance Code：	unknown
风险等级：	5.75	最大时钟频率：	0.032 MHz
信息访问方法：	I2C	中断能力：	N
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	封装等效代码：	TSSOP8,.25
封装形状：	RECTANGULAR	封装形式：	SMALL OUTLINE, THIN PROFILE, SHRINK PITCH
电源：	3/3.3 V	认证状态：	Not Qualified
座面最大高度：	1.2 mm	子类别：	Timer or RTC
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
最短时间：	SECONDS	易失性：	YES
宽度：	3 mm	uPs/uCs/外围集成电路类型：	TIMER, REAL TIME CLOCK
Base Number Matches：	1

X1241V8I-2.7 数据手册

X1241 – Preliminary Information

another change to the CCR contents. If the

WATCHDOG TIMER OPERATION

sequence is not completed for any reason (by send-

ing an incorrect number of bits or sending a start

instead of a stop, for example) the RWEL bit is not

reset and the device remains in an active mode.

The watchdog timer is selectable. By writing a value to

WD1 and WD0, the watchdog timer can be set to 3 dif-

ferent time out periods or off. When the Watchdog

timer is set to off, the watchdog circuit is conﬁgured for

low power operation.

– Writing all zeros to the status register resets both the

WEL and RWEL bits.

Watchdog Timer Restart

– A read operation occurring between any of the previ-

ous operations will not interrupt the register write

operation.

The Watchdog Timer is restarted by a falling edge of

SDA when the SCL line is high. This is also referred to

as start condition.The restart signal restarts the watch-

dog timer counter, resetting the period of the counter

back to the maximum. If another start fails to be

detected prior to the watchdog timer expiration, then

the reset pin becomes active. In the event that the

restart signal occurs during a reset time out period, the

restart will have no effect.

– The RWEL and WEL bits can be reset by writing a 0

to the Status Register.

POWER ON RESET

Application of power to the X1241 activates a Power

On Reset Circuit that pulls the RESET pin active. This

signal provides several beneﬁts.

LOW VOLTAGE RESET OPERATION

– It prevents the system microprocessor from starting

to operate with insufﬁcient voltage.

When a power failure occurs, and the voltage to the

part drops below a ﬁxed V

voltage, a reset pulse is

– It prevents the processor from operating prior to sta-

bilization of the oscillator.

TRIP

issued to the host microcontroller. The circuitry moni-

tors the V line with a voltage comparator which

– It allows time for an FPGA to download its conﬁgura-

tion prior to initialization of the circuit.

senses a preset threshold voltage. Power up and

power down waveforms are shown in Figure 4. The

Low Voltage Reset circuit is to be designed so the

RESET signal is valid down to 1.0V.

– It prevents communication to the EEPROM, greatly

reducing the likelihood of data corruption on power

up.

When the low voltage reset signal is active, the operation

of any in progress nonvolatile write cycle is unaffected,

allowing a nonvolatile write to continue as long as possi-

ble (down to the power on reset voltage). The low voltage

reset signal, when active, terminates in progress commu-

nications to the device and prevents new commands, to

reduce the likelihood of data corruption.

When V

exceeds the device V

threshold value

TRIP

for 250ms the circuit releases RESET, allowing the

system to begin operation.

Figure 3. Watchdog Restart/Time Out

RSP

RSP WDO

RST

RSP WDO

SCL

SDA

RESET

Note: All inputs are ignored during the active reset period (t

RST

Characteristics subject to change without notice. 6 of 22

REV 1.1.3 2/13/01

www.xicor.com

1...3 4 567 8 9...22

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与X1241V8I-2.7相关器件

型号	品牌	描述	获取价格	数据表
X1241V8I-2.7A	RENESAS	Real Time Clock, Volatile, 0 Timer(s), CMOS, PDSO8, PLASTIC, TSSOP-8	获取价格
X1241V8I-4.5A	RENESAS	0 TIMER(S), REAL TIME CLOCK, PDSO8, PLASTIC, TSSOP-8	获取价格
X1242S8	RENESAS	0 TIMER(S), REAL TIME CLOCK, PDSO8, PLASTIC, SOIC-8	获取价格
X1242S8-2.7	RENESAS	0 TIMER(S), REAL TIME CLOCK, PDSO8, PLASTIC, SOIC-8	获取价格
X1242S8-2.7A	RENESAS	0 TIMER(S), REAL TIME CLOCK, PDSO8, PLASTIC, SOIC-8	获取价格
X1242S8-4.5A	RENESAS	0 TIMER(S), REAL TIME CLOCK, PDSO8, PLASTIC, SOIC-8	获取价格

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