參數(shù)資料
型號: HT7044A
廠商: Holtek Semiconductor Inc.
英文描述: Voltage Detector
中文描述: 電壓檢測器
文件頁數(shù): 7/16頁
文件大小: 162K
代理商: HT7044A
HT70XX
Rev. 1.60
7
January 14, 2003
The hysteresis width is:
V
HYS
= V
DET
(+)
V
DET
( )
The figure demonstrates the NMOS output type with
positive output polarity (V
OUT
is normally open, active
low). The HT70XX series also supplies options for other
output types with active high outputs. Application cir-
cuits shown are examples of positive output polarity
(normally open, active low) unless otherwise specified.
! !
"
#
NMOS output voltage detector (HT70XXA)
Application Circuits
Microcomputer reset circuit
Normally a reset circuit is required to protect the micro-
computer system from malfunctions due to power line
interruptions. The following examples show how differ-
ent output configurations perform a reset function in var-
ious systems.
NMOS open drain output application for separate
power supply
NMOS open drain output application with R-C delay
Power-on reset circuit
With several external components, the NMOS open
drain type of the HT70XX series can be used to perform
a power-on reset function as shown:
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