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參數(shù)資料
a negative-going pulse applied to VCC, starting above the
actual reset threshold and ending below it by the magni-
tude indicated (reset comparator overdrive). The graph
indicates the typical maximum pulse width a negative-
going VCC transient may have without causing a reset
pulse to be issued. As the magnitude of the transient
increases (goes farther below the reset threshold), the
maximum allowable pulse width decreases. A 0.1F
capacitor mounted as close as possible to VCC provides
additional transient immunity.
Ensuring a Valid RESET
Output Down to VCC = 0
The MAX6381–MAX6390 are guaranteed to operate
properly down to VCC = 1V. In applications that require
valid reset levels down to VCC = 0, a pulldown resistor to
active-low outputs (push/pull only, Figure 2) and a
pullup resistor to active-high outputs (push/pull only) will
ensure that the reset line is valid while the reset output
can no longer sink or source current. This scheme does
not work with the open-drain outputs of the
MAX6383/MAX6386/MAX6389/MAX6390. The resistor
value used is not critical, but it must be small enough
not to load the reset output when VCC is above the reset
threshold. For most applications, 100k
is adequate.
MAX6381–MAX6390
SC70, Single/Dual Low-Voltage,
Low-Power P Reset Circuits
_______________________________________________________________________________________
7
MAX6387
MAX6388
MAX6389
RESET IN
( ) IS FOR MAX6388
R1
R2
RESET
(RESET)
GND
VCC
VIN
MAX6381
MAX6384
MAX6387
VCC
R1
100k
RESET
GND
Figure 1. RESET IN Configuration
Figure 2. RESET Valid to VCC = Ground Circuit
PART
RESET
THRESHOLD
RESET TIMEOUT
46
44
31
29
26
23
22
17
MAX638_
16
D3
46
44
31
29
26
23
22
17
MAX6390
16
D4
Standard Versions
Reset Timeout Delay
SUFFIX
MIN
D1
1ms
D2
20ms
D3
140ms
D5
280ms
D6
560ms
D4
1120ms
D7
1200ms
MAX6390XSD4
1120/140ms *
MAX6390XSD7
1200/150ms *
* The MAX6390 has a 1120ms or 1200ms RESET timeout and a
140ms or 150ms manual reset timeout
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PDF描述 |
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| MAX6382XS37D7-T | SC70, Single/Dual Low-Voltage, Low-Power レP Reset Circuits |
| MAX6383XS37D5-T | SC70, Single/Dual Low-Voltage, Low-Power レP Reset Circuits |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX6382XS37D6-T | 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:SC70, Single/Dual Low-Voltage, Low-Power レP Reset Circuits |
| MAX6382XS37D7-T | 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:SC70, Single/Dual Low-Voltage, Low-Power レP Reset Circuits |
| MAX6382XS38D1-T | 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:SC70, Single/Dual Low-Voltage, Low-Power レP Reset Circuits |
| MAX6382XS38D2-T | 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:SC70, Single/Dual Low-Voltage, Low-Power レP Reset Circuits |
| MAX6382XS38D3-T | 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:SC70, Single/Dual Low-Voltage, Low-Power レP Reset Circuits |
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