Datasheet > MAX6830RFUT

MAX6830RFUT

更新时间： 2024-01-07 19:08:34

品牌	Logo	应用领域
美信 - MAXIM		信息通信管理光电二极管
页数	文件大小	规格书
12页	590K
描述
Power Supply Management Circuit, BICMOS, PDSO6,

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技术参数
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MAX6830RFUT 技术参数

是否无铅：	含铅	是否Rohs认证：	不符合
生命周期：	Contact Manufacturer	Reach Compliance Code：	not_compliant
ECCN代码：	EAR99	HTS代码：	8542.39.00.01
风险等级：	5.8	模拟集成电路 - 其他类型：	POWER SUPPLY MANAGEMENT CIRCUIT
JESD-30 代码：	R-PDSO-G6	湿度敏感等级：	1
端子数量：	6	最高工作温度：	125 °C
最低工作温度：	-40 °C	封装主体材料：	PLASTIC/EPOXY
封装代码：	TSOP	封装等效代码：	TSOP6,.11,37
封装形状：	RECTANGULAR	封装形式：	SMALL OUTLINE, THIN PROFILE
峰值回流温度（摄氏度）：	225	电源：	3/3.3 V
认证状态：	Not Qualified	子类别：	Power Management Circuits
表面贴装：	YES	技术：	BICMOS
温度等级：	AUTOMOTIVE	端子形式：	GULL WING
端子节距：	0.95 mm	端子位置：	DUAL
处于峰值回流温度下的最长时间：	NOT SPECIFIED

MAX6830RFUT 数据手册

Dual Ultra-Low-Voltage SOT23 µP Supervisors

with Manual Reset and Watchdog Timer

Watchdog Software Considerations

One way to help the watchdog timer monitor software

execution more closely is to set and reset the watchdog

input at different points in the program, rather than

pulsing the watchdog input high-low-high or low-high-

low. This technique avoids a stuck loop, in which the

watchdog timer would continue to be reset inside the

loop, keeping the watchdog from timing out.

directly to the microcontroller’s RESET pin with a single

pullup resistor allows the device to assert a reset

(Figure 6).

Negative-Going V

Transients

These supervisors are relatively immune to short-dura-

tion, negative-going V transients (glitches), which

usually do not require the entire system to shut down.

Resets are issued to the µP during power-up, power-

down, and brownout conditions. The Typical Operating

Figure 8 shows an example of a flow diagram where the

I/O driving the watchdog input is set high at the begin-

ning of the program, set low at the beginning of every

subroutine or loop, then set high again when the pro-

gram returns to the beginning. If the program should

hang in any subroutine, the problem would quickly be

corrected, since the I/O is continually set low and the

watchdog timer is allowed to time out, causing a reset

or interrupt to be issued. As described in the Watchdog

Input Current section, this scheme results in higher time

average WDI input current than does leaving WDI low

for the majority of the timeout period and periodically

pulsing it low-high-low.

Characteristics show a graph of the Maximum V

Transient Duration vs. Reset Threshold Overdrive, for

which reset pulses are not generated. The graph was

produced using negative-going V

pulses, starting at

the standard monitored voltage and ending below the

reset threshold by the magnitude indicated (reset

threshold overdrive). The graph shows the maximum

pulse width that a negative-going V

transient can

typically have without triggering a reset pulse. As the

amplitude of the transient increases (i.e., goes farther

below the reset threshold), the maximum allowable

pulse width decreases. Typically, a V

transient that

goes 100mV below the reset threshold and lasts for

20µs or less will not trigger a reset pulse.

Ensuring a Valid RESET

Output Down to V

= 0

The MAX6826–MAX6831 are guaranteed to operate

properly down to V = 1V. In applications that require

START

valid reset levels down to V

= 0, a pulldown resistor

SET WDI

HIGH

to active-low outputs (push/pull only, Figure 7) and a

pullup resistor to active-high outputs (push/pull only) will

ensure that the reset line is valid while the reset output

can no longer sink or source current. This scheme does

not work with the open-drain outputs of the

MAX6828/MAX6831. The resistor value used is not criti-

cal, but it must be small enough not to load the reset

PROGRAM

CODE

SUBROUTINE OR

PROGRAM LOOP

output when V

is above the reset threshold. For falling

slew rates greater than 1V/s, a 100kΩ is adequate.

SET WDI LOW

RETURN

Figure 8. Watchdog Flow Diagram

MAX6826

MAX6829

RESET

100kΩ

GND

Figure 7. RESET Valid to V = Ground Circuit

10 ______________________________________________________________________________________

1...7 8 91011 12

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与MAX6830RFUT相关器件

型号	品牌	描述	获取价格	数据表
MAX6830RGUT+T	MAXIM	Power Supply Management Circuit, Fixed, 2 Channel, BICMOS, PDSO6, SOT-23, 6 PIN	获取价格
MAX6830RGUT-T	MAXIM	Power Supply Management Circuit, Fixed, 2 Channel, BICMOS, PDSO6, SOT-23, 6 PIN	获取价格
MAX6830RHUT	MAXIM	Power Supply Management Circuit, BICMOS, PDSO6,	获取价格
MAX6830RIUT+T	MAXIM	Power Supply Management Circuit, Fixed, 2 Channel, BICMOS, PDSO6, SOT-23, 6 PIN	获取价格
MAX6830RIUT-T	MAXIM	Power Supply Management Circuit, Fixed, 2 Channel, BICMOS, PDSO6, SOT-23, 6 PIN	获取价格
MAX6830RVUT	MAXIM	Power Supply Management Circuit, BICMOS, PDSO6,	获取价格

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