參數(shù)資料
型號(hào)： MAX6878
廠商： Maxim Integrated Products, Inc.
英文描述： 4-Bit Bistable Latches 16-CDIP -55 to 125
中文描述： 雙/三電壓、電源跟蹤器/排序器/監(jiān)控器
文件頁(yè)數(shù)： 13/24頁(yè)
文件大?。?/td> 307K
代理商： MAX6878
M
Dual-/Triple-Voltage, Power-Supply
Trackers/Sequencers/Supervisors
______________________________________________________________________________________
13
Pin Description
PIN
MAX6877
MAX6878
MAX6879
NAME
FUNCTION
1
1
—
V
CC
Optional Supply Voltage Input. Connect V
CC
to an alternate (i.e., always-on)
supply if desired. Leave V
CC
unconnected, if not used. V
CC
allows IN_
supplies less than UVLO to be tracked. V
CC
is internally pulled down by a
100k
resistor.
2
2
1
ABP
Internal Supply Bypass Input. Bypass ABP with a 1μF capacitor to GND. ABP
maintains the device supply voltage during rapid power-down conditions.
3
4
—
4
—
2
SET3
SET2
5
5
3
SET1
Externally Adjusted IN_ Undervoltage Lockout Threshold. Connect SET_ to
an external resistor-divider network to set the desired undervoltage threshold
for each IN_ supply (see the
Typical Application Circuit
). All SET_ inputs
must be above the internal SET_ threshold (0.5V) to enable tracking or
sequencing functionality.
—
3, 16, 17,
22
—
N.C.
No Connection. Not internally connected.
6
6
4
EN/
UV
Logic-Enable Input or Undervoltage Lockout Monitor Input. EN/
UV
must be
high (EN/
UV
> V
EN_R
) to enable voltage tracking or sequencing power-up
operation. OUT_ begins tracking down when EN/
UV
< V
EN_F
. Connect EN/
UV
to an external resistor-divider network to set the external UVLO threshold.
7
7
5
GND
Ground
8
8
6
DELAY
Tracking Startup/Sequence Delay Select Input. Connect a capacitor from
DELAY to GND to select the desired delay period before tracking is enabled
(after all SET_ inputs and EN/
UV
are above their respective thresholds) or
between supply sequences. Leave DELAY unconnected for the default
200μs delay period.
9
9
7
SLEW
Slew-Rate Adjustment Input. Connect a capacitor from SLEW to GND to
select the desired OUT_ slew rate.
10
10
—
TIMEOUT
PG/
RST
Timeout Period Adjust Input. PG/
RST
asserts high after the timeout
period when all OUT_ exceed their IN_ referenced threshold. Connect a
capacitor from TIMEOUT to GND to set the desired timeout period. Leave
TIMEOUT unconnected for the default 200μs delay period.
11
11
8
LTCH/
RTR
Latch/Autor etr y S el ecti on Inp ut. D ve
L TC H
/RTR l ow to sel ect the l atch m od e.
C onnect
L TC H
/RTR to ABP or l eave unconnected to sel ect autor etr y m od e.
L TC H
/RTR i s i nter nal y p ul ed up to ABP thr oug h a 10μA cur ent sour ce.
12
12
9
TRK
/SEQ
Track/Sequence Select Input. Drive
TRK
/SEQ low to enable supply tracking
function. Connect
TRK
/SEQ to ABP or leave it unconnected to enable supply
sequencing.
TRK
/SEQ is internally pulled to ABP through a 10μA current
source.
13
13
—
MARGIN
Margin Input, Active-Low. Drive
MARGIN
low to enable margin mode (see
the
Margin
section). The
MARGIN
functionality is disabled (returns to normal
monitoring mode) after
MARGIN
returns high.
MARGIN
is internally pulled up
to ABP through a 10μA current source.
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MAX6878ETG 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
MAX6878ETG+ 功能描述:監(jiān)控電路 Dual 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
MAX6878ETG+T 功能描述:監(jiān)控電路 Dual 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
MAX6878ETG-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
MAX6879ETE 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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