HA16117FPB

更新时间： 2024-01-21 23:42:04

品牌	Logo	应用领域
瑞萨 - RENESAS		电源电路电源管理电路光电二极管
页数	文件大小	规格书
31页	545K
描述
CMOS Watchdog Timer

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技术参数
数据手册

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HA16117FPB 技术参数

是否Rohs认证：	符合	生命周期：	Not Recommended
零件包装代码：	SOIC	包装说明：	SOP,
针数：	8	Reach Compliance Code：	compliant
ECCN代码：	EAR99	HTS代码：	8542.39.00.01
风险等级：	5.32	模拟集成电路 - 其他类型：	POWER SUPPLY SUPPORT CIRCUIT
JESD-30 代码：	R-PDSO-G8	JESD-609代码：	e2
湿度敏感等级：	1	信道数量：	1
功能数量：	1	端子数量：	8
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：	SOP
封装形状：	RECTANGULAR	封装形式：	SMALL OUTLINE
峰值回流温度（摄氏度）：	260	认证状态：	Not Qualified
最大供电电压 (Vsup)：	14 V	表面贴装：	YES
技术：	CMOS	温度等级：	INDUSTRIAL
端子面层：	Tin/Copper (Sn/Cu)	端子形式：	GULL WING
端子位置：	DUAL	处于峰值回流温度下的最长时间：	20
Base Number Matches：	1

HA16117FPB 数据手册

HA16117F Series

Timing Waveforms and Functional Description

V_TL

V_CC

P-RUN

Crash

t_RH

Watchdog function on

RES

t_ON

t_OFF

t_ON

(V_ACC= "Low")

t_RL

Watchdog function off

RES

t_ON

(V_ACC= "High")

Figure 1 Timing Waveforms

Watchdog On/Off Function

A feature of the HA16117F is that watchdog supervision can be switched on and off. When the watchdog function is

switched on, both the supply voltage and

P-RUN input are monitored to detect abnormal conditions. When the watchdog function is switched off (standby

mode), only the supply voltage is monitored. Watchdog supervision is switched on and off by the input at the ACC pin

(pin 7): Supervision is on when ACC is low, and off when ACC is high.

Many MPUs have a standby mode in which the CPU stops running but memory contents are retained. In standby mode,

program execution halts and I/O ports go to the high-impedance state, so there is no need for the watchdog timer to

supervise pulse output from an I/O port to detect abnormal conditions. Power can be saved by placing both the MPU

and HA16117F in standby mode at the same time. The HA16117F is designed to draw a typical standby current I_STBY

of only 43 µA Typ when the watchdog function is switched off.

ACC Pin (pin 7) and RES Output

When the MPU returns from standby mode to normal operation it generally takes 10 to 200 ms for the clock oscillator

in the MPU to stabilize. The RES signal is not output during this setup time. After the setup time (t_SL) has elapsed,

RES is output if the P-RUN signal from the MPU is still abnormal.

Adjust according to

MPU's setup time

ACC pin

t_SH

t_SL

RES (due to MPU crash)

Figure 2 ACC Pin and RES Output

Rev.3.00 Jun 15, 2005 page 6 of 30

1...3 4 567 8 9...31

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