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參數(shù)資料
| 型號： | MAX6836WXSD1+T |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | 電源管理 |
| 英文描述： | Ultra-Low-Voltage SC70 Voltage Detectors and µP Reset Circuits |
| 中文描述： | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO4 |
| 封裝： | SC-70, 4 PIN |
| 文件頁數(shù)： | 8/11頁 |
| 文件大小： | 197K |
| 代理商： | MAX6836WXSD1+T |
MAX6832–MAX6840
Detailed Description
Reset Output
A microprocessor’s (P’s) reset input starts the P in a
known state. The MAX6832–MAX6840 assert a reset to
prevent code-execution errors during power-up, power-
down, or brownout conditions. They also assert a reset
signal whenever the VCC supply voltage falls below a
preset threshold (MAX6832–MAX6837) or RESET-IN
falls below the adjustable threshold (MAX6838/
MAX6839/MAX6840), keeping reset asserted for a fixed
timeout delay (Table 2) after VCC or RESET-IN has risen
above the reset threshold. The MAX6832/MAX6835/
MAX6838 use a push-pull active-low output, the
MAX6833/MAX6836/MAX6839 have a push-pull active-
high output, and the MAX6834/MAX6837/MAX6840
have an open-drain active-low output stage. Connect a
pullup resistor on the MAX6834/MAX6837/MAX6840’s
RESET output to any supply between 0 and 6V.
Manual Reset Input
Many P-based systems require manual reset capabili-
ty, allowing the operator, a test technician, or external
logic circuitry to initiate a reset. Reset remains asserted
while MR is low, and for a fixed timeout delay after MR
returns high. This input has an internal 20k
pullup
resistor, so it can be left open if it is not used. MR can
be driven with CMOS logic level, or with open-drain/col-
lector outputs. To create a manual reset function, con-
nect a normally open momentary switch from MR to
ground; external debounce circuitry is not required. If
MR is driven from long cables or if the device is used in
a noisy environment, connecting a 0.1F capacitor from
MR to ground provides additional noise immunity.
RESET-IN Information
The MAX6838/MAX6839/MAX6840 feature a RESET-IN
input for monitoring supply voltages down to 0.44V. An
external resistive-divider network can be used to set
voltage monitoring thresholds as shown in Figure 1. As
the monitored voltage falls, the voltage at RESET-IN
decreases and asserts a reset when it falls below the
RESET-IN threshold (VRSTIN). The low-leakage current
Ultra-Low-Voltage SC70 Voltage Detectors
and P Reset Circuits
6
_______________________________________________________________________________________
MAX6838/
MAX6839/
MAX6840
RESET
TIMEOUT
PERIOD
RESET
OUTPUT
VREF = 444mV
RESET-IN
RESET/
RESET
GND
VCC
MAX6832–
MAX6837
RESET
TIMEOUT
PERIOD
MANUAL
RESET
DETECT
RESET
OUTPUT
VREF = 444mV
RESET/
RESET
GND
MR (MAX6835/MAX6836/MAX6837 ONLY)
MR
PULLUP
Functional Diagrams
VMONITORED
R1
R2
RESET-IN
GND
RESET
(RESET)
VCC
( ) ARE FOR MAX6839
MAX6838/
MAX6839/
MAX6840
R1 = R2 [(VMONITORED/VREF) -1]
WHERE VMONITORED IS THE DESIRED TRIP LEVEL,
VREF = 444mV
Figure 1. Setting the Adjustable Threshold Externally
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX6836WXSD2 | 制造商:Maxim Integrated Products 功能描述:ULTRA-LOW-VOLTAGE SC70 VOLTAGE DETE - Rail/Tube |
| MAX6836WXSD2+ | 制造商:Maxim Integrated Products 功能描述:PROCESSOR SUPERVISOR 1.665V 16UA 4PIN SC-70 - Rail/Tube |
| MAX6836WXSD2+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 |
| MAX6836WXSD2-T | 功能描述:監(jiān)控電路 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 |
| MAX6836WXSD3 | 制造商:Maxim Integrated Products 功能描述:ULTRA-LOW-VOLTAGE SC70 VOLTAGE DETE - Rail/Tube |
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