数据搜索系统,热门电子元器件搜索
  Chinese  ▼
ALLDATASHEETCN.COM

X  

STC706R 数据表(PDF) 5 Page - List of Unclassifed Manufacturers

部件名 STC706R
功能描述  UP Supervisor Circuits
Download  7 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
制造商  ETC1 [List of Unclassifed Manufacturers]
网页  
标志 ETC1 - List of Unclassifed Manufacturers

STC706R 数据表(HTML) 5 Page - List of Unclassifed Manufacturers

  STC706R Datasheet HTML 1Page - List of Unclassifed Manufacturers STC706R Datasheet HTML 2Page - List of Unclassifed Manufacturers STC706R Datasheet HTML 3Page - List of Unclassifed Manufacturers STC706R Datasheet HTML 4Page - List of Unclassifed Manufacturers STC706R Datasheet HTML 5Page - List of Unclassifed Manufacturers STC706R Datasheet HTML 6Page - List of Unclassifed Manufacturers STC706R Datasheet HTML 7Page - List of Unclassifed Manufacturers  
Zoom Inzoom in Zoom Outzoom out
 5 / 7 page
background image
5
Data Sheet
STC705-706/706P-707-708-708T/S/R-813L
µµµµµP Supervisor Circuits
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------
STC
Ver1.0
Functional Description
The STCxxx family can assert reset output during power-up,
power-down and brownout conditions for uP system, detect
power failure or low-battery conditions with a 1.25V threshold
detector and have watchdog functions. Refer to Table 2 for
their individual features. The typical application see Figure 4.
Reset Output
The supervisory circuits can assert reset for a microprocessor
during power-up, power-down and brownout to prevent code
execution errors.
On power-up, once V
CC reaches about 1.2V, RESET is a
guaranteed logic low of 0.4V or less. As V
CC rises, RESET stays
low. When V
CC rises above the reset threshold, an internal timer
releases RESET after about 200ms. RESET pulses low whenever
V
CC drops below the reset threshold (brownout condition). If
brownout occurs in the middle of a previously initiated reset
pulse, the pulse continues for at least another 140ms.
On power-down, once V
CC falls below the reset threshold,
RESET stays low and is guaranteed to be 0.4V or less until Vcc
drops below 1V.
The STC813x and STC706P active-high RESET output is
simply the complement of the RESET output, and is guaranteed
to be valid with V
CC down to 1.2V. Some µPs, such as Intel’s
80C51, require an active-high reset pulse.
Watchdog Timer
The watchdog circuit monitors the µP’s activity. If the µP does
not toggle the watchdog input (WDI) within 1.6sec and WDI is
not in high impedance, WDO goes low. As long as RESET is
asserted or the WDI input is in high impedance, the watchdog
timer will stay cleared and will not count. As soon as reset is
released and WDI is driven high or low, the timer will start
counting. Pulses as short as 50ns can be detected.
Typically, WDO will be connected to the non-maskable
interrupt input (NMI) of a µP. When V
CC drops below the reset
threshold, WDO will go low whether or not the watchdog timer
has timed out yet. Normally this would trigger an NMI
interrupt, but RESET goes low simultaneously, and thus
overrides the NMI interrupt. If WDI is left unconnected, WDO
can be used as a low-line output. Since floating WDI disables
the internal timer, WDO goes low only when V
CC falls below
the reset threshold, thus functioning as a low-line output.
Manual Reset
The manual-reset input (MR) allows reset to be triggered by a
push-button switch. The switch is effectively debounced by
the 140ms minimum reset pulse width. MR is TTL/CMOS
logic compatible, so it can be driven by any logic reset output.
Power-Fail Comparator
The power-fail comparator will send out a Low signal once
detects a voltage lowered than 1.25V. It can be used for various
purposes because its output and non-inverting input are not
internally connected. The inverting input is internally
connected to a 1.25V reference.
Figure 4. Typical Application Circuit
DC Linear
Regulator
Vcc
Supervisory
PFI
Circuit
WDI
µ
µµ
µP
Vcc
RESET
I/O Line
NMI
Interrupt
IN
OUT
RESET
WDO
PFO
MR
µ
µµ
µP


类似零件编号 - STC706R

制造商部件名数据表功能描述
logo
AUK corp
STC722D AUK-STC722D Datasheet
72Kb / 3P
   NPN Silicon Transistor
logo
KODENSHI_AUK CORP.
STC722D KODENSHI-STC722D Datasheet
246Kb / 4P
   NPN Silicon Transistor
STC722D KODENSHI-STC722D Datasheet
246Kb / 4P
   NPN Silicon Transistor
logo
Suntac Electronic Corp.
STC733 SUNTAC-STC733 Datasheet
125Kb / 3P
   PNP Silicon Transistor
logo
Suntsu Electronics, Inc...
STC75C SUNTSU-STC75C Datasheet
702Kb / 4P
   Ceramic SMT 10 Pad CMOS (VC)TCXO
More results

类似说明 - STC706R

制造商部件名数据表功能描述
logo
Pericom Semiconductor C...
PT7A7511-15 PERICOM-PT7A7511-15 Datasheet
370Kb / 9P
   uP Supervisor Circuits
logo
List of Unclassifed Man...
STC809 ETC1-STC809 Datasheet
110Kb / 13P
   UP Supervisor Circuits
logo
Alliance Semiconductor ...
ASM705 ALSC-ASM705 Datasheet
190Kb / 15P
   Low Power UP Supervisor Circuits
AS705 ALSC-AS705 Datasheet
198Kb / 16P
   Low Power uP Supervisor Circuits
ASM706 ALSC-ASM706 Datasheet
274Kb / 16P
   3/3.3/4.0 V uP Supervisor Circuits
logo
Pericom Semiconductor C...
PT7A7511 PERICOM-PT7A7511_14 Datasheet
311Kb / 8P
   Supervisor Circuits
logo
Diodes Incorporated
PT7A7511 DIODES-PT7A7511 Datasheet
1Mb / 11P
   μP Supervisor Circuits
August 2020 Rev 1-3
PT7M7803 DIODES-PT7M7803 Datasheet
1Mb / 15P
   關P Supervisor Circuits
5/10/2017
logo
Fairchild Semiconductor
FM810LS3X FAIRCHILD-FM810LS3X Datasheet
460Kb / 9P
   3-Pin UC Supervisor Circuits
FM809 FAIRCHILD-FM809 Datasheet
54Kb / 8P
   3-Pin UC Supervisor Circuits
More results


Html Pages

1 2 3 4 5 6 7


数据表 下载

Go To PDF Page


链接网址




隐私政策
ALLDATASHEETCN.COM
ALLDATASHEET是否为您带来帮助?  [ DONATE ] 

关于 Alldatasheet   |   广告服务   |   联系我们   |   隐私政策   |   链接交换   |   制造商名单
All Rights Reserved©Alldatasheet.com


Mirror Sites
English : Alldatasheet.com  |   English : Alldatasheet.net  |   Chinese : Alldatasheetcn.com  |   German : Alldatasheetde.com  |   Japanese : Alldatasheet.jp
Russian : Alldatasheetru.com  |   Korean : Alldatasheet.co.kr  |   Spanish : Alldatasheet.es  |   French : Alldatasheet.fr  |   Italian : Alldatasheetit.com
Portuguese : Alldatasheetpt.com  |   Polish : Alldatasheet.pl  |   Vietnamese : Alldatasheet.vn
Indian : Alldatasheet.in  |   Mexican : Alldatasheet.com.mx  |   British : Alldatasheet.co.uk  |   New Zealand : Alldatasheet.co.nz
Family Site : ic2ic.com  |   icmetro.com