參數(shù)資料
型號(hào)： MAX6884ETP+
廠商： MAXIM INTEGRATED PRODUCTS INC
元件分類： 電源管理
英文描述： EEPROM-Programmable, Hex, Power-Supply Supervisors with an ADC
中文描述： 1-CHANNEL POWER SUPPLY MANAGEMENT CKT, QCC20
封裝： 5 X 5 MM, 0.80 MM PITCH, MO-220WHHC, QFN-20
文件頁(yè)數(shù)： 8/34頁(yè)
文件大?。?/td> 310K
代理商： MAX6884ETP+
MAX6884/MAX6885
EEPROM-Programmable, Hex
Power-Supply Supervisory Circuits
16
______________________________________________________________________________________
External Voltage-Divider
To achieve thresholds from 0.1667V to 1.0167V in
3.3mV increments, program the respective input voltage
detector for high impedance and use an external volt-
age-divider (see Figure 2). Set voltage-detector inputs
for high impedance by programming bits R10h[5:0].
Design the resistor voltage-divider to scale the input
voltage to between 0.1667V and 1.0167V at the input of
the device. In this way, voltages higher than 5.8V and in
between the 10mV and 20mV steps can be monitored.
Program R00h through R0Eh to adjust the thresholds
between 0.1667V and 1.0167V in 3.3mV steps.
AUXIN (MAX6884 Only)
The AUXIN high-impedance analog input is intended to
monitor additional system voltages not required for
reset purposes. The internal 10-bit ADC converts the
voltage at AUXIN and stores the data in the ADC regis-
ters (see Table 3). AUXIN does not affect any of the
programmable outputs. The AUXIN input accepts
power-supply voltages or other system voltages scaled
to the 1.25V ADC input voltage range.
MR
Program RESET and/or UV/OV to assert when manual
reset input MR is brought low (see Tables 5 and 6).
Outputs programmed to assert when MR is brought low
remain asserted after MR is brought high for their
respective programmed timeout periods. An internal
10A current source pulls MR to VDBP. Leave MR
unconnected or connect to DBP if unused.
MARGIN
MARGIN allows system-level testing while power sup-
plies exceed the normal ranges. Drive MARGIN low to
hold the programmable outputs in their existing state
while system-level testing occurs. Leave MARGIN
unconnected or connect to DBP if unused. An internal
10A current source pulls MARGIN to VDBP. The inter-
nal ADC continues to convert voltages while MARGIN is
low. The state of each programmable output does not
change while MARGIN = GND. MARGIN overrides MR
if both are asserted at the same time.
REFIN (MAX6884 Only)
The MAX6884/MAX6885 feature an internal 1.25V volt-
age reference. The voltage reference sets the threshold
of the voltage detectors and provides a reference volt-
age for the internal ADC. Program the MAX6884 to use
an internal or external reference by programming bit
R16h[7] (see Table 5). Leave REFIN unconnected
when using the internal reference. REFIN accepts an
external reference in the 1.225V to 1.275V range.
MAX6884
MAX6885
VIN
IN_
PRIMARY REGISTER
SECONDARY REGISTER
REGISTER
ADDRESS
EEPROM
MEMORY
ADDRESS
BIT
RANGE
DESCRIPTION
16h
96h
[7]
1 = Enable External
Reference
0 = Enable Internal
Reference
Figure 2. External Voltage-Divider Architecture
Table 5. Internal/External Reference
相關(guān)PDF資料
PDF描述
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MAX6884ETP+ 功能描述:監(jiān)控電路 EEPROM-Prog Hex Power-Sup Sequencer 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(guò)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(kāi)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
MAX6884ETP+T 功能描述:監(jiān)控電路 EEPROM-Prog Hex Power-Sup Sequencer 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(guò)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(kāi)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
MAX6884ETP-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(guò)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(kāi)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
MAX6884EVCMOD2 功能描述:監(jiān)控電路 Programmers, Development Systems 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(guò)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(kāi)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
MAX6884EVKIT 功能描述:監(jiān)控電路 Programmers, Development Systems 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(guò)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(kāi)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
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