MAX6319LHUK34BW-T

更新时间： 2024-01-14 14:23:14

品牌	Logo	应用领域
美信 - MAXIM		模拟IC
页数	文件大小	规格书
14页	205K
描述
Analog IC

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MAX6319LHUK34BW-T 数据手册

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5-Pin µP Supervisory Circuits with

Watchdog and Manual Reset

MAX6316–MAX6322

RESET

(ALL EXCEPT MAX6317)

RESET

GENERATOR

RESET

(ALL EXCEPT

MAX6316/MAX6320P)

1.23V

52k

(ALL EXCEPT

MAX6318/MAX6321)

WATCHDOG

TRANSITION

DETECTOR

WATCHDOG

TIMER

WDI

(ALL EXCEPT

MAX6319/MAX6322)

52k

GND

Figure 1. Functional Diagram

the watchdog timeout period (t ). Reset remains assert-

_______________Detailed Description

ed for the specified reset active timeout period (t ) after

A microprocessor’s (µP) reset input starts or restarts the

µP in a known state. The reset output of the MAX6316–

MAX6322 µP supervisory circuits interfaces with the

reset input of the µP, preventing code-execution errors

during power-up, power-down, and brownout condi-

tions (see the Typical Operating Circuit). The MAX6316/

MAX6317/MAX6318/MAX6320/MAX6321 are also capa-

ble of asserting a reset should the µP become stuck in

an infinite loop.

rises above the reset threshold, after MR transitions

low to high, or after the watchdog timer asserts the reset

(MAX6316_/MAX6317H/MAX6318_H/MAX6320P/

MAX6321HP). After the reset active timeout period (t

)

expires, the reset output deasserts, and the watchdog

timer restarts from zero (Figure 2).

RST

Reset Output

The MAX6316L/MAX6318LH/MAX6319LH feature an

active-low reset output, while the MAX6317H/

MAX6318_H/MAX6319_H/MAX6321HP/MAX6322HP

feature an active-high reset output. RESET is guaran-

teed to be a logic low and RESET is guaranteed to be a

GND

RESET

logic high for V

down to 1V.

RESET

GND

The MAX6316–MAX6322 assert reset when V

is below

the reset threshold (V

), when MR is pulled low

RST

(MAX6316_/MAX6317H/MAX6319_H/MAX6320P/

MAX6322HP only), or if the WDI pin is not serviced within

Figure 2. Reset Timing Diagram

_______________________________________________________________________________________

1...3 4 567 8 9...14

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