參數(shù)資料
型號(hào)： MAX6894
廠商： Maxim Integrated Products, Inc.
英文描述： Pin-Selectable, Octal/Hex/Quad, Power-Supply Sequencers/Supervisors
中文描述： 引腳可設(shè)置八/六/四路電源排序器/監(jiān)控器
文件頁數(shù)： 1/19頁
文件大小： 298K
代理商： MAX6894
General Description
The MAX6892/MAX6893/MAX6894 pin-selectable, mul-
tivoltage supply sequencers/supervisors monitor sever-
al voltage-detector inputs and one watchdog input,
asserting the respective voltage detector or watchdog
output when the inputs drop below the configured volt-
age thresholds or the watchdog timer expires. The
MAX6892 features eight voltage detector inputs and 10
outputs. The MAX6893 features six voltage-detector
inputs and eight outputs, while the MAX6894 features
four voltage detector inputs and six outputs. A
RESET
output ensures all monitored inputs are above the set
thresholds. The voltage detector outputs are configured
as open drain. Manual reset and margin disable inputs
offer additional flexibility.
The thresholds of the MAX6892/MAX6893/MAX6894 are
selected through five logic inputs (TH0–TH4). The logic on
these five inputs selects the supply voltage tolerance (5%
or 10%) and one of 32 factory-set thresholds settings.
Watchdog and reset timeout periods can use factory
default settings or are independently adjustable by con-
necting external capacitors.
When any of the monitored voltages falls below its
threshold, the respective output asserts and remains
asserted for 6.25ms (typ) after the monitored voltage
exceeds the threshold. The outputs can be connected
to the shutdown or enable inputs of DC-DC regulators
to provide turn-on power sequencing to ensure proper
system initialization.
The MAX6892 is available in a 5mm x 5mm x 0.8mm,
32-pin, thin QFN package, while the MAX6893/
MAX6894 are available in a 5mm x 5mm x 0.8mm, 28-
pin, thin QFN package. The MAX6892/MAX6893/
MAX6894 are specified to operate over the extended
temperature range (-40°C to +85°C)
Applications
Telecommunication/Central Office Systems
Networking Systems
Servers/Workstations
Base Stations
Storage Equipment
Multimicroprocessor/Voltage Systems
Features
Pin-Selectable or User-Adjustable Voltage
Detector Thresholds
Dedicated
RESET
and
WDO
Outputs
Capacitor-Adjustable Reset and Watchdog
Timeout Periods
Factory-Default Reset and Watchdog Timeout
Periods
Up to Eight Independent, Open-Drain Power-Good
Outputs
Enable Margining Disable and Manual Reset
Controls
-40°C to +85°C Operating Temperature Range
Small 5mm x 5mm Thin QFN Package
Few External Components
±1% Threshold Accuracy
Ordering Information
M
Pin-Selectable, Octal/Hex/Quad, Power-Supply
Sequencers/Supervisors
________________________________________________________________
Maxim Integrated Products
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
1
PART
TEMP RANGE
PIN-
PACKAGE
PKG
CODE
MAX6892
ETJ
MAX6893
ETI
MAX6894
ETI
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
32 Thin QFN
28 Thin QFN
28 Thin QFN
T3255-4
T2855-8
T2855-8
19-3596; Rev 0; 2/05
Typical Operating Circuit appears at end of data sheet.
Pin Configurations
32
31
30
29
28
27
26
9
10
11
12
13
14
15
18
19
20
21
22
23
24
7
6
5
4
3
2
1
MAX6892
THIN QFN
TOP VIEW
PG3
PG2
PG4
GND
PG5
PG6
PG7
8
*EXPOSED PADDLE
*EXPOSED PAD INTERNALLY CONNECTED TO GND.
Pin Configurations continued at end of data sheet.
PG8
P
W
I
I
I
I
I
25
I
IN7
IN8
DBP
VCC
ENABLE
SRT
SWT
17
TH4
T
T
16
T
T
M
M
W
R
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MAX6894ETI 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
MAX6894ETI+ 功能描述:監(jiān)控電路 Pin-Selectable Quad Power Supply Sequenc 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
MAX6894ETI+T 功能描述:監(jiān)控電路 Pin-Selectable Quad Power Supply Sequenc 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
MAX6894ETI-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
MAX6895AALT 制造商:Maxim Integrated Products 功能描述:ULTRA-SMALL ADJUSTABLE SEQUENCING/ - Rail/Tube
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