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參數(shù)資料
| 型號： | MAX6845UKD4+T |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | 電源管理 |
| 英文描述： | Ultra-Low-Voltage µP Reset Circuits and Voltage Detectors |
| 中文描述： | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO5 |
| 封裝： | SOT-23, 5 PIN |
| 文件頁數(shù)： | 7/9頁 |
| 文件大?。?/td> | 214K |
| 代理商： | MAX6845UKD4+T |
Using the MAX6842/MAX6845 Open-Drain
RESET Output with Multiple Supplies
Generally, the pullup connected to the MAX6842/
MAX6845 connects to the supply voltage being moni-
tored at the IC’s VCC pin. However, some systems use
the open-drain output to level-shift from the monitored
supply to reset circuitry powered by some other supply
(Figure 5). Note that as the MAX6842/MAX6845’s VCC
decreases, so does the IC’s ability to sink current at
RESET. Also, with any pullup, RESET is pulled high as
VCC decays toward 0. The voltage where this occurs
depends on the pullup resistor value and the voltage to
which it is connected.
Chip Information
TRANSISTOR COUNT: 788
PROCESS: BiCMOS
MAX6841–MAX6845
Ultra-Low-Voltage P Reset Circuits and
Voltage Detectors
_______________________________________________________________________________________
7
Table 1. Threshold Suffix Guide
MAX6842
MAX6845
VCC
RESET
GND
VCC
RESET
GND
RPULLUP
0.9V
P
+5.0V
Figure 5. Using the MAX6842/MAX6845 Open-Drain RESET
Output with Multiple Supplies
SUFFIX
RESET THRESHOLD (V)
I
1.388
H
1.313
G
1.110
F
1.050
E
0.833
D
0.788
Table 2. Active Timeout Period Guide
RESET ACTIVE TIMEOUT PERIOD (ms)
SUFFIX
MIN
TYP
MAX
D0
—
0.15
—
D1
1
1.5
2
D2
20
30
40
D3
140
210
280
D4
1120
1680
2240
Table 3. Standard Versions
DEVICE
TOP MARK
MAX6841HUKD0
AEDR
MAX6841HUKD3
AEDS
MAX6841FUKD0
AEDP
MAX6841FUKD3
AEDQ
MAX6841DUKD0
AEDN
MAX6841DUKD3
AEDO
MAX6842HUKD0
AEDX
MAX6842HUKD3
AEDY
MAX6842FUKD0
AEDV
MAX6842FUKD3
AEDW
MAX6842DUKD0
AEDT
MAX6842DUKD3
AEDU
MAX6843UKD0
AEDZ
MAX6843UKD3
AEAV
MAX6844UKD0
AEEB
MAX6844UKD3
AEEC
MAX6845UKD0
AEAX
MAX6845UKD3
AEAY
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