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參數(shù)資料
| 型號(hào)： | MAX6442UTM |
| 廠商： | Maxim Integrated Products, Inc. |
| 英文描述： | GT 7C 7#12 PIN RECP LINE |
| 中文描述： | 低功耗，電池監(jiān)視器Single-/Dual-Level滯和集成？P復(fù)位 |
| 文件頁數(shù)： | 8/14頁 |
| 文件大?。?/td> | 235K |
| 代理商： | MAX6442UTM |
M
has stabilized before power-converter or microproces-
sor activity is enabled.
These devices also have an independent μP supervisor
that monitors V
CC
and provides an active-low reset out-
put. A manual reset function is available to allow the
user to reset the μP with a push-button.
Low-Battery Output
The low-battery outputs are available in active-low
(
LBO
,
LBOL
,
LBOH
,
LBOLH
), open-drain configura-
tions. The low-battery outputs can be pulled to a volt-
age independent of V
CC
or V
BATT
, up to 5.5V. This
allows the device to monitor and operate from direct
battery voltage while interfacing to higher voltage
microprocessors.
The MAX6439/MAX6440 single-output voltage monitors
provide a single low-battery output,
LBO
. These fixed-
threshold devices assert
LBO
when V
BATT
drops below
V
LTH
and remain asserted for at least 150ms after
V
BATT
rises above V
HTH
(see Figure 2). The MAX6441/
MAX6442 triple-output voltage monitors provide three
low-battery outputs:
LBOH
,
LBOL
, and
LBOLH
.
LBOH
asserts when V
BATT
drops below V
HTH-
and remains
asserted for at least 150ms after V
BATT
rises above
V
HTH+
.
LBOL
asserts when V
BATT
drops below V
LTH-
and remains asserted for at least 150ms after V
BATT
rises above V
LTH+
.
LBOLH
asserts when V
BATT
drops
below V
LTH-
and remains asserted for at least 150ms
after V
BATT
rises above V
HTH+
(see Figure 3). For fast-
rising V
BATT
input, the
LBOL
timeout period must com-
plete before the
LBOH
/
LBOLH
timeout period begins.
Reset Output
The MAX6439
–
MAX6442 provide an active-low reset
output (
RESET
).
RESET
is asserted when the voltage at
V
CC
falls below the reset threshold level. Reset remains
asserted for the reset timeout period after V
CC
exceeds
the threshold. If V
CC
goes below the reset threshold
before the reset timeout period is completed, the inter-
nal timer restarts. The MAX6439/MAX6441 have open-
drain reset outputs, while the MAX6440/MAX6442 have
push-pull reset outputs (see Figure 4).
Low-Power, Single-/Dual-Level Battery Monitors
with Hysteresis and Integrated μP Reset
8
_______________________________________________________________________________________
5%
HYST
LTH
DETECT
V
DETECT
5%
HYST
HTH
DETECT
V
BATT
V
CC
1.23V
LBO
TIMEOUT
PERIOD
RESET
TIMEOUT
PERIOD
V
CC
LBOL
LBOH
LBOLH
RESET
MR
MAX6441
Figure 1b. Functional Diagram
MAX6440
LTH
DETECT
HTH
DETECT
R
S
Q
LBO TIMEOUT
PERIOD
RESET
TIMEOUT
PERIOD
V
DETECT
V
CC
V
CC
V
BATT
LBO
RESET
V
CC
1.23V
Q
MR
Figure 1a. Functional Diagram
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MAX6442UTN | Low-Power, Single-/Dual-Level Battery Monitors with Hysteresis and Integrated ?P Reset |
| MAX6442UTO | Low-Power, Single-/Dual-Level Battery Monitors with Hysteresis and Integrated ?P Reset |
| MAX6442UTP | Low-Power, Single-/Dual-Level Battery Monitors with Hysteresis and Integrated ?P Reset |
| MAX6453UT16S | uP Supervisors with Separate VCC Reset and Manual Reset Outputs |
| MAX6454UT29S | uP Supervisors with Separate VCC Reset and Manual Reset Outputs |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX6443US16L | 制造商:Maxim Integrated Products 功能描述:+P RESET CIRCUITS WITH LONG MANUAL - Cut Tape Product |
| MAX6443US16L+ | 制造商:Maxim Integrated Products 功能描述:PROCESSOR SUPERVISOR 1.58V 7UA 4PIN SOT-143 - Rail/Tube |
| MAX6443US16L+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 |
| MAX6443US16L-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 |
| MAX6443US17L | 制造商:Maxim Integrated Products 功能描述:+P RESET CIRCUITS WITH LONG MANUAL - Rail/Tube |
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