參數(shù)資料
型號(hào)： MAX6889ETJ+
廠商： MAXIM INTEGRATED PRODUCTS INC
元件分類： 電源管理
英文描述： EEPROM-Programmable, Octal/Hex/Quad, Power-Supply Sequencers/Supervisors
中文描述： 8-CHANNEL POWER SUPPLY MANAGEMENT CKT, PQCC32
封裝： 5 X 5 MM, TQFN-32
文件頁(yè)數(shù)： 4/40頁(yè)
文件大?。?/td> 255K
代理商： MAX6889ETJ+
MAX6889/MAX6890/MAX6891
EEPROM-Programmable, Octal/Hex/Quad,
Power-Supply Sequencers/Supervisors
12
______________________________________________________________________________________
Detailed Description
The MAX6889/MAX6890/MAX6891 EEPROM-config-
urable, multivoltage supply sequencers/supervisors
monitor several voltage detector inputs and general-
purpose logic inputs, and feature programmable out-
puts for highly-configurable power-supply sequencing
applications. The MAX6889 features eight voltage
detector inputs and ten programmable outputs. The
MAX6890 features six voltage detector inputs and eight
programmable outputs, while the MAX6891 features
four voltage detector inputs and five programmable
outputs. Manual reset and margin disable inputs simpli-
fy board-level testing during the manufacturing
process.
All voltage detectors provide configurable thresholds
for undervoltage detection. The high-voltage input (IN1)
monitors voltages from 1.25V to 7.625V in 25mV incre-
ments, or 2.5V to 13.2V in 50mV increments. Inputs
(IN2–IN7) monitor voltages from 0.5V to 3.05V in 10mV
increments, or 1.0V to 5.5V in 20mV increments. An
additional high-voltage input (IN8, MAX6889 only) mon-
itors voltages from 1.25V to 7.625V in 25mV incre-
ments, or 2.5V to 15.25V in 50mV increments. To
monitor thresholds from 0.1667V to 1.0167V in 3.3mV
increments, the respective input voltage detector must
be programmed for high impedance (high-Z) and an
external voltage-divider must be connected.
The
host
controller
communicates
with
the
MAX6889/MAX6890/MAX6891s’ internal 512-bit user
EEPROM, configuration EEPROM, and configuration
registers through an SMBus/I2C-compatible serial inter-
face (see Figure 1).
Programmable output options include active-high, active-
low, open drain, and weak pullup. Program each output
to assert on any voltage detector input, general-purpose
logic input, watchdog timer, or manual reset. Program-
mable timing delay blocks configure each output to wait
between 25s and 1600ms before deasserting.
The MAX6889/MAX6890/MAX6891 feature a watchdog
timer for added flexibility. Program the watchdog timer to
assert one or more programmable outputs. Program the
watchdog timer to clear on a combination of one GPI_
input and one programmable output, one of the GPI_
inputs only, or one of the programmable outputs only.
The initial and normal watchdog timeout periods are
independently programmable from 6.25ms to 102.4s.
LOGIC NETWORK
FOR PO_
COMPARATORS
MR, GPI_,
MARGIN
IN _
OUTPUT
STAGES
ANALOG
BLOCK
DIGITAL
BLOCK
SERIAL
INTERFACE
REGISTER BANK
BOOT
CONTROLLER
EEPROM
(USER AND CONFIG)
SDA,
SCL
WATCHDOG
TIMER
GPI_
PO_
Figure 1. Top-Level Block Diagram
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MAX6889ETJ+ 功能描述:監(jiān)控電路 EEPROM-Prog Octal 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
MAX6889ETJ+T 功能描述:監(jiān)控電路 EEPROM-Prog Octal 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
MAX6889ETJ-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
MAX6889EVCMAXQ 功能描述:監(jiān)控電路 EEPROM-Programmable Octal/Hex/Quad Power-Supply Sequencers/Supervisors 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
MAX6889EVCMAXQU 功能描述:監(jiān)控電路 Evaluation Kit/Evaluation System for the MAX6889 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
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