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參數(shù)資料
| 型號： | MAX8212CPA |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | 電源管理 |
| 英文描述： | CAPACITOR (NC/NR) |
| 中文描述： | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDIP8 |
| 封裝： | PLASTIC, DIP-8 |
| 文件頁數(shù)： | 5/8頁 |
| 文件大小： | 67K |
| 代理商： | MAX8212CPA |
Calculate resistor values for Figure 3 as follows:
1) Choose a value for R1. Typical values are in
the 10k
to 10M
range.
2) Calculate R2 for the desired upper trip point
V
U
using the formula:
(VU
VTH)
VTH
3) Calculate R3 for the desired amount of
hysteresis, where V
L
is the lower trip point:
(V
VTH)
(VU
VL)
or, if V
+
= V
IN
:
Figure 5 shows an alternate circuit, suitable only when the
voltage being detected is also the power-supply voltage
for the MAX8211 or MAX8212.
Calculate resistor values for Figure 5 as follows:
1) Choose a value for R1. Typical values are in
the 10k
to 10M
range.
2) Calculate R2:
(VL
VTH)
VTH
3) Calculate R3:
Low-V oltage Detec tor for Logic S upply
The circuit of Figure 5 will detect when a 5.0V (nominal)
supply goes below 4.5V, which is the V
MIN
normally
specified in logic systems. The selected resistor values
ensure that false undervoltage alarms will not be gener-
ated, even with worst-case threshold trip values and
resistor tolerances. R3 provides approximately 75mV of
hysteresis.
R3
R1
(VU
1.15V
VL)
=
×
R2
R1
R1
(VL
1.15V)
1.15V
=
×
=
×
R3
R2
(VL
(VU
VTH)
VL)
R2
(VL
(VU
1.15V)
VL)
=
×
=
×
R3
R2
R2
(V +
1.15V)
VL)
(VU
=
×
+
=
×
R2 = R1
R1
(VU
1.15V)
1.15V
×
=
×
M
Mic roproc essor Voltage Monitors
with Programmable Voltage Detec tion
________________________________________________________________________________________
5
-55
T
A
(°C)
V
T
1.250
1.230
1.210
1.190
1.170
1.150
1.130
1.110
1.090
1.070
1.050
M
-25
25
75
125
V+ = 16.5V
V+ = 2V
Figure 4. MAX8211/MAX8212 Threshold Trip Voltage vs.
Ambient Temperature
V
IN
HYST
MAX8211
OUT
GND
V+
R3
48.7k
1%
R2
20M
1%
R1
750k
1%
V
(LOW FOR
V
IN
< 4.5V)
THRESH
Figure 5. MAX8211 Logic-Supply Low-Voltage Detector
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| MAX8212CPA+ | 功能描述:監(jiān)控電路 MPU Voltage Monitor 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 |
| MAX8212CPA-2 | 制造商:Maxim Integrated Products 功能描述:- Rail/Tube |
| MAX8212CSA | 功能描述:監(jiān)控電路 Integrated Circuits (ICs) 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 |
| MAX8212CSA+ | 功能描述:監(jiān)控電路 MPU Voltage Monitor 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 |
| MAX8212CSA+T | 功能描述:監(jiān)控電路 MPU Voltage Monitor 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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