- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄383453 > MAX6421US__-T (Maxim Integrated Products, Inc.) Low-Power, SC70/SOT レP Reset Circuits with Capacitor-Adjustable Reset Timeout Delay PDF資料下載
參數(shù)資料
| 型號(hào)： | MAX6421US__-T |
| 廠商： | Maxim Integrated Products, Inc. |
| 英文描述： | Low-Power, SC70/SOT レP Reset Circuits with Capacitor-Adjustable Reset Timeout Delay |
| 中文描述： | 低功耗，SC70/SOTレP復(fù)位電路，帶有電容可調(diào)的復(fù)位延遲時(shí)間 |
| 文件頁(yè)數(shù)： | 4/10頁(yè) |
| 文件大?。?/td> | 263K |
| 代理商： | MAX6421US__-T |
M
Low-Power, SC70/SOT μP Reset Circuits with
Capacitor-Adjustable Reset Timeout Delay
4
_______________________________________________________________________________________
Detailed Description
Reset Output
The reset output is typically connected to the reset input
of a μP. A μP’s reset input starts or restarts the μP in a
known state. The MAX6340/MAX6421–MAX6426 μP
supervisory circuits provide the reset logic to prevent
code-execution errors during power-up, power-down,
and brownout conditions (see
Typical Operating
Characteristics
).
RESET
changes from high to low whenever V
CC
drops
below the threshold voltage. Once V
CC
exceeds the
threshold voltage,
RESET
remains low for the capacitor-
adjustable reset timeout period.
The MAX6422 active-high RESET output is the inverse
logic of the active-low
RESET
output. All device outputs
are guaranteed valid for V
CC
> 1V.
The MAX6340/MAX6423/MAX6425/MAX6426 are open-
drain
RESET
outputs. Connect an external pullup resis-
tor to any supply from 0 to 5.5V. Select a resistor value
large enough to register a logic low when
RESET
is
asserted and small enough to register a logic high
while supplying all input current and leakage paths
connected to the
RESET
line. A 10k
to 100k
pullup
is sufficient in most applications.
Selecting a Reset Capacitor
The reset timeout period is adjustable to accommodate
a variety of μP applications. Adjust the reset timeout
period (t
RP
) by connecting a capacitor (C
SRT
) between
SRT and ground. Calculate the reset timeout capacitor
as follows:
Pin Description
PIN
MAX6340
MAX6421
MAX6422
MAX6423
MAX6424
MAX6425
MAX6426
SOT23
SOT143
SC70
SOT23
SOT23
NAME
FUNCTION
1
3
3
5
1
SRT
Set Reset Timeout Input. Connect a capacitor between SRT
and ground to set the timeout period. Determine the period as
follows: t
RP
= 2.73
10
6
C
SRT
+ 275μs with t
RP
in seconds
and C
SRT
in farads.
2
3
4
1
—
2
2
—
1
3
4
2
2, 3
—
5
GND
N.C.
V
CC
Ground
Not Internally Connected. Can be connected to GND.
Supply Voltage and Reset Threshold Monitor Input
5
1
4
RESET
RESET
changes from high to low whenever V
CC
drops below
the selected reset threshold voltage.
RESET
remains low for
the reset timeout period after V
CC
exceeds the reset
threshold.
—
4
4
—
—
RESET
RESET changes from low to high whenever V
CC
drops below
the selected reset threshold voltage. RESET remains high for
the reset timeout period after V
CC
exceeds the reset
threshold.
MAX6340
MAX6423
MAX6425
MAX6426
V
REF
C
SRT
SRT
RESET
TIMEOUT
N
GND
RESET
LASER-TRIMMED
RESISTORS
V
CC
3.3V
10k
5.0V
5V
SYSTEM
Figure 1. MAX6340/MAX6423/MAX6425/MAX6426 Open-Drain
RESET
Output Allows Use with Multiple Supplies
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MAX6421XS__-T | Low-Power, SC70/SOT レP Reset Circuits with Capacitor-Adjustable Reset Timeout Delay |
| MAX6422US__-T | Low-Power, SC70/SOT レP Reset Circuits with Capacitor-Adjustable Reset Timeout Delay |
| MAX6422XS__-T | Low-Power, SC70/SOT レP Reset Circuits with Capacitor-Adjustable Reset Timeout Delay |
| MAX6423US__-T | Low-Power, SC70/SOT レP Reset Circuits with Capacitor-Adjustable Reset Timeout Delay |
| MAX6423XS__-T | Low-Power, SC70/SOT レP Reset Circuits with Capacitor-Adjustable Reset Timeout Delay |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX6421XS16 | 制造商:Maxim Integrated Products 功能描述:- Cut Tape Product |
| MAX6421XS16+ | 制造商:Maxim Integrated Products 功能描述:PROCESSOR SUPERVISOR 1.575V 2.5UA 4PIN SC-70 - Rail/Tube 制造商:Rochester Electronics LLC 功能描述: |
| MAX6421XS16+T | 功能描述:監(jiān)控電路 Single uPower Reset Circuit RoHS:否 制造商:STMicroelectronics 監(jiān)測(cè)電壓數(shù): 監(jiān)測(cè)電壓: 欠電壓閾值: 過電壓閾值: 輸出類型:Active Low, Open Drain 人工復(fù)位:Resettable 監(jiān)視器:No Watchdog 電池備用開關(guān):No Backup 上電復(fù)位延遲（典型值）:10 s 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:UDFN-6 封裝:Reel |
| MAX6421XS16-T | 功能描述:監(jiān)控電路 RoHS:否 制造商:STMicroelectronics 監(jiān)測(cè)電壓數(shù): 監(jiān)測(cè)電壓: 欠電壓閾值: 過電壓閾值: 輸出類型:Active Low, Open Drain 人工復(fù)位:Resettable 監(jiān)視器:No Watchdog 電池備用開關(guān):No Backup 上電復(fù)位延遲（典型值）:10 s 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:UDFN-6 封裝:Reel |
| MAX6421XS17 | 制造商:Maxim Integrated Products 功能描述:- Cut Tape Product |
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。