IMP809S datasheet(5/7 Pages) IMP

tên linh kiện	IMP809S

Giải thích chi tiết về linh kiện	3-Pin Microcontroller Power Supply Supervisor

PDF	7 Pages

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nhà sản xuất	IMP [IMP, Inc]

Trang chủ	http://www.ds-imp.com.cn/index.asp

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IMP809, IMP8

IMP809, IMP81100

Bi-directional Reset Pin Interfacing

The IMP809/810 can interface with µP/µC bi-directional reset

pins by connecting a 4.7k

Ω resistor in series with the

IMP809/810 reset output and the µP/µC bi-directional reset pin.

Negative VCC Transients

The IMP809/810 protect µPs from brownouts and low VCC. Short

duration transients of 100mV amplitude and 20µs or less duration

typically do not cause a false RESET.

To ensure logic inputs connected to the IMP809 RESET pin are in

a known state when VCC is under 1.1V, a 100kΩ pull-down

resistor at RESET is needed. The value is not critical. A pull-up

resistor to VCC is needed with the IMP810.

Power

Supply

IMP810

VCC

GND

RESET

100k

Ω

809/10_05.eps

Valid Reset with VCC under 1.1V

Power

Supply

IMP809

VCC

GND

RESET

100k

Ω

809/10_04.eps

Power

Supply

IMP809

VCC

GND

RESET

4.7k

Ω

809/10_06.eps

Bi-directional I/O Pin

(Example: 68HC11)

BUF

Buffered

RESET

µC or µP

RESET

Input

Application Information

Figure 2. RESET Valid with VCC Under 1.1V

Figure 3. RESET Valid with VCC Under 1.1V

Figure 4. Bi-directional Reset Pin Interfacing

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