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參數(shù)資料
| 型號： | MAX6384LT16D7+T |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | 電源管理 |
| 英文描述： | SC70/µDFN, Single/Dual Low-Voltage, Low-Power µP Reset Circuits |
| 中文描述： | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO6 |
| 封裝： | 1.50 X 1 MM, 0.80 MM HEIGHT, LEAD FREE, MO-252WAAD, MICRO, DFN-6 |
| 文件頁數(shù)： | 33/36頁 |
| 文件大小： | 501K |
| 代理商： | MAX6384LT16D7+T |
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MAX6381–MAX6390
SC70/DFN, Single/Dual Low-Voltage,
Low-Power P Reset Circuits
6
_______________________________________________________________________________________
Detailed Description
RESET Output
A P reset input starts the P in a known state. These
P supervisory circuits assert reset to prevent code
execution errors during power-up, power-down, or
brownout conditions.
Reset asserts when VCC is below the reset threshold;
once VCC exceeds the reset threshold, an internal timer
keeps the reset output asserted for the reset timeout
period. After this interval, reset output deasserts. Reset
output is guaranteed to be in the correct logic state for
VCC
≥ 1V.
Manual Reset Input (MAX6384/
MAX6385/MAX6386/MAX6390)
Many P-based products require manual reset capabil-
ity, allowing the operator, a test technician, or external
logic circuitry to initiate a reset. A logic low on MR
asserts reset. Reset remains asserted while MR is low,
and for the reset active timeout period (tRP) after MR
returns high. This input has an internal 63k
pullup
resistor (1.56k
for MAX6390), so it can be left uncon-
nected if it is not used. MR can be driven with TTL or
CMOS logic levels, or with open-drain/collector outputs.
Connect a normally open momentary switch from MR to
GND to create a manual-reset function; external
debounce circuitry is not required. If MR is driven from
long cables or if the device is used in a noisy environ-
ment, connecting a 0.1F capacitor from MR to GND
provides additional noise immunity.
RESET IN Comparator
(MAX6387/MAX6388/MAX6389)
RESET IN is compared to an internal +1.27V reference.
If the voltage at RESET IN is less than 1.27V, reset
asserts. Use the RESET IN comparator as a user-
adjustable reset detector or as a secondary power-sup-
ply monitor by implementing a resistor-divider at RESET
IN (shown in Figure 1). Reset asserts when either VCC
or RESET IN falls below its respective threshold volt-
age. Use the following equation to set the threshold:
VINTH = VTHRST (R1/R2 + 1)
where VTHRST = +1.27V. To simplify the resistor selec-
tion, choose a value of R2 and calculate R1:
R1 = R2 [(VINTH/VTHRST) - 1]
Since the input current at RESET IN is 50nA (max),
large values can be used for R2 with no significant loss
in accuracy.
___________Applications Information
Negative-Going VCC Transients
In addition to issuing a reset to the P during power-up,
power-down,
and
brownout
conditions,
the
MAX6381–MAX6390 are relatively immune to short dura-
tion negative-going VCC transients (glitches).
The Typical Operating Characteristics section shows the
Maximum Transient Durations vs. Reset Comparator
Overdrive, for which the MAX6381–MAX6390 do not
generate a reset pulse. This graph was generated using
Reset Thresholds (-40°C to +125°C)
SUFFIX
VTH (min)
VTH (nom)
VTH (max)
46
4.51
4.63
4.74
45
4.39
4.50
4.61
44
4.27
4.38
4.48
43
4.19
4.30
4.41
42
4.10
4.20
4.31
41
4.00
4.10
4.20
40
3.90
4.00
4.10
39
3.80
3.90
4.00
38
3.71
3.80
3.90
37
3.61
3.70
3.79
36
3.51
3.60
3.69
35
3.41
3.50
3.59
34
3.32
3.40
3.49
33
3.22
3.30
3.38
32
3.12
3.20
3.28
31
3.00
3.08
3.15
30
2.93
3.00
3.08
29
2.85
2.93
3.00
28
2.73
2.80
2.87
27
2.63
2.70
2.77
26
2.56
2.63
2.69
25
2.44
2.50
2.56
24
2.34
2.40
2.46
23
2.26
2.31
2.37
22
2.13
2.19
2.24
21
2.05
2.10
2.15
20
1.95
2.00
2.05
19
1.85
1.90
1.95
18
1.76
1.80
1.85
17
1.62
1.67
1.71
16
1.54
1.58
1.61
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX6384LT17D1+ | 制造商:Maxim Integrated Products 功能描述:PROCESSOR SUPERVISOR 1.67V 7UA 6PIN UDFN - Rail/Tube |
| MAX6384LT17D1+T | 功能描述:監(jiān)控電路 Single uPower Reset Circuit RoHS:否 制造商:STMicroelectronics 監(jiān)測電壓數(shù): 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(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 |
| MAX6384LT17D2+ | 制造商:Maxim Integrated Products 功能描述:PROCESSOR SUPERVISOR 1.67V 7UA 6PIN UDFN - Rail/Tube |
| MAX6384LT17D2+T | 功能描述:監(jiān)控電路 Single uPower Reset Circuit RoHS:否 制造商:STMicroelectronics 監(jiān)測電壓數(shù): 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(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 |
| MAX6384LT17D3+ | 制造商:Maxim Integrated Products 功能描述:PROCESSOR SUPERVISOR 1.67V 7UA 6PIN UDFN - Rail/Tube |
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