Datasheet > IMP812SEUS-T

IMP812SEUS-T

更新时间： 2024-01-22 23:16:27

品牌	Logo	应用领域
IMP		微处理器监控
页数	文件大小	规格书
8页	139K
描述
4-pin レP Voltage Supervisor with Manual Reset

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中文翻译

获取价格

技术参数
数据手册

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IMP812SEUS-T 技术参数

生命周期：	Contact Manufacturer	包装说明：	,
Reach Compliance Code：	unknown	风险等级：	5.7
Is Samacsys：	N	Base Number Matches：	1

IMP812SEUS-T 数据手册

IMP811, IMP812

Application Information

RESET Output Operation

In µP/µC systems it is important to have the processor begin

operation from a known state or be able to return the system to a

known state. A RESET output to a processor is provided to pre-

vent improper operation during power supply sequencing or low

voltage – brownout – conditions.

If V drops below the reset threshold, RESET automatically

becomes active. Alternatively, external circuitry or a human oper-

ator can initiate this condition using the Manual Reset (MR) pin.

There is an internal pullup on MR so it can be left open if it is not

used. MR can be driven by TTL/CMOS logic or even an external

switch, since it is already debounced. If the switch is at the end of

a long cable, it might require a bypass (100nF) at the pin if noise

pickup is a problem.

The IMP811/812 are designed to monitor the system power sup-

ply voltages and issue a RESET signal when levels are out of

range. RESET outputs are guaranteed to be active for V above

1.1V. When V exceeds the reset threshold, an internal timer

Six voltage thresholds are available to support 3V and 5V systems:

keeps RESET active for the reset timeout period, after which

RESET becomes inactive (HIGH for the IMP811 and LOW for the

IMP812).

Reset Threshold

Suffix

Voltage (V)

4.63

4.38

4.00

3.08

2.93

2.63

Valid Reset with V_CCunder 1.1V

Negative V_CCTransients

To ensure that logic inputs connected to the IMP811 RESET pin Typically short duration transients of 100mV amplitude and 20µs

are in a known state when V_CCis under 1.1V, a 100kΩ pull-down duration do not cause a false RESET. A 0.1µF capacitor at V_CC

resistor at RESET is needed. The value is not critical.

increases transient immunity.

A similar pull-up resistor to V_CCis needed with the IMP812.

100kΩ

IMP812

IMP811

Power

Supply

RESET

100k

GND

811/12_05.eps

811/12_04.eps

Figure 2. RESET Valid with V_CCUnder 1.1V

Figure 3. RESET Valid with V_CCUnder 1.1V

408-432-9100/www.impweb.com

1...3 4 567 8

中文翻译

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与IMP812SEUS-T相关器件

型号	品牌	获取价格	描述	数据表
IMP812TEUS-T	IMP	获取价格	4-pin レP Voltage Supervisor with Manual Reset
IMP812TEUS-T	A1PROS	获取价格	4--Piin μP Vollttage Superrviissorr wiitth Ma
IMP813	IMP	获取价格	LOW-POWER レP SUPERVISOR CIRCUITS
IMP813LC/D	IMP	获取价格	LOW-POWER レP SUPERVISOR CIRCUITS
IMP813LCPA	IMP	获取价格	LOW-POWER レP SUPERVISOR CIRCUITS
IMP813LCSA	IMP	获取价格	LOW-POWER レP SUPERVISOR CIRCUITS
IMP813LCUA	IMP	获取价格	LOW-POWER レP SUPERVISOR CIRCUITS
IMP813LEPA	IMP	获取价格	LOW-POWER レP SUPERVISOR CIRCUITS
IMP813LESA	IMP	获取价格	LOW-POWER レP SUPERVISOR CIRCUITS
IMP8-1A0-00-A-XXX	ASTEC	获取价格	Intelligent MP Series Up to 1500 Watts

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