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參數資料
| 型號： | MAX644MJD |
| 廠商： | Maxim Integrated Products, Inc. |
| 元件分類： | 線性穩(wěn)壓 |
| 英文描述： | Dual Regulator-Synchronous Rectified Buck PWM and Linear Power Controller; Temperature Range: 0°C to 70°C; Package: 14-SOIC |
| 中文描述： | 型DC - DC電壓轉換器 |
| 文件頁數： | 9/13頁 |
| 文件大?。?/td> | 261K |
| 代理商： | MAX644MJD |
MAX6443–MAX6452
P Reset Circuits with Long Manual Reset
Setup Period
_______________________________________________________________________________________
5
Detailed Description
Reset Output
The reset output is typically connected to the reset
input of a microprocessor (P). A P’s reset input starts
or restarts the P in a known state. The MAX6443–
MAX6452 P supervisory circuits provide the reset
logic to prevent code-execution errors during power-
up, power-down and brownout conditions (see the
Typical Operating Circuit).
RESET changes from high to low whenever the moni-
tored voltages (RSTIN or VCC) drop below the reset
threshold voltages. Once VRSTIN and VCC exceed their
respective reset threshold voltages, RESET remains low
for the reset timeout period and then goes high. RESET
is one-shot pulsed whenever selected manual reset
inputs are asserted. RESET stays asserted for the nor-
mal reset timeout period (140ms min).
RESET is guaranteed to be in the proper output logic
state for VCC inputs
≥ 1V. For applications requiring valid
reset logic when VCC is less than 1V, see the Ensuring a
Valid RESET Output Down to VCC = 0V section.
Pin Description
PIN
MAX6443
MAX6444
MAX6445
MAX6446
MAX6447
MAX6448
MAX6449
MAX6450
MAX6451
MAX6452
NAME
FUNCTION
1
2
GND
Ground
21
11
1
RESET
Active-Low Push-Pull or Open-Drain Output. RESET
changes from high to low when VCC or RSTIN drops below
its selected reset threshold and remains low for the 210ms
reset timeout period after all monitored power-supply inputs
exceed their selected reset thresholds. RESET is one-shot
pulsed low for the reset timeout period (140ms min) after
selected manual reset inputs are asserted longer than the
specified setup period. For the open-drain output, use a
minimum 20k
pullup resistor to VCC .
3
—
3
—
3
Manual Reset Input, Active Low. Internal 50k
pullup to
VCC. Pull MR1 low for the typical input pulse width
(6.72s) to one-shot pulse RESET for the reset timeout
period.
—
3
—
3
—
MR1
Manual Reset Input, Active Low. Pull both MR1 and
MR2 low for the typical input pulse width (6.72s) to one-
shot pulse RESET for the reset timeout period.
44
4
VCC
VCC Voltage Input. Power supply and input for the
primary microprocessor voltage reset monitor.
—
5
—
6
—
MR2
Manual Reset Input, Active Low. Internal 50k
pullup to
VCC. Pull both MR1 and MR2 low for the typical input
pulse width (6.72s) to one-shot pulse RESET for the
reset timeout period.
——
5
—
6
MR2
Manual Reset Input. Pull the MR2 high to immediately
one-shot pulse RESET for the reset timeout period.
——
—
55
RSTIN
Reset Input. High-impedance input to the adjustable
reset comparator. Connect RSTIN to the center point of
an external resistor-divider to set the threshold of the
externally monitored voltage.
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相關代理商/技術參數 |
參數描述 |
|---|---|
| MAX6450BTA16T+T | 功能描述:監(jiān)控電路 P Reset Circuits with Long Manual Reset Setup Period RoHS:否 制造商:STMicroelectronics 監(jiān)測電壓數: 監(jiān)測電壓: 欠電壓閾值: 過電壓閾值: 輸出類型:Active Low, Open Drain 人工復位:Resettable 監(jiān)視器:No Watchdog 電池備用開關:No Backup 上電復位延遲（典型值）:10 s 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:UDFN-6 封裝:Reel |
| MAX6450TA16S+T | 制造商:Maxim from Components Direct 功能描述:MAXIM MAX6450TA16S+T PROCESSOR SUPERVISORS - Tape and Reel 制造商:Maxim 功能描述:Maxim MAX6450TA16S+T Processor Supervisors |
| MAX6450UT16L | 制造商:Maxim Integrated Products 功能描述:MICROPROCESSOR RESET CIRCUITS WITH - Rail/Tube |
| MAX6450UT16L+ | 制造商:Maxim Integrated Products 功能描述:PROCESSOR SUPERVISOR ADJV 7UA 6PIN SOT-23 - Rail/Tube |
| MAX6450UT16L+T | 功能描述:監(jiān)控電路 Dual uPower Reset Circuit RoHS:否 制造商:STMicroelectronics 監(jiān)測電壓數: 監(jiān)測電壓: 欠電壓閾值: 過電壓閾值: 輸出類型:Active Low, Open Drain 人工復位:Resettable 監(jiān)視器:No Watchdog 電池備用開關:No Backup 上電復位延遲（典型值）:10 s 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:UDFN-6 封裝:Reel |
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