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參數(shù)資料
| 型號(hào)： | MAX807MCUE |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | 電源管理 |
| 英文描述： | Full-Featured uP Supervisory Circuit with +/-1.5% Reset Accuracy |
| 中文描述： | 1-CHANNEL POWER SUPPLY MANAGEMENT CKT, PDSO16 |
| 封裝： | TSSOP-16 |
| 文件頁數(shù)： | 7/16頁 |
| 文件大?。?/td> | 196K |
| 代理商： | MAX807MCUE |
M
Full-Featured μP Supervisory Circuit with
±1.5% Reset Accuracy
_______________________________________________________________________________________
7
Pin Description
Active-Low Reset Output. RESET is triggered and stays low when V
CC
is below the reset threshold or
when MR is low. It remains low 200ms after V
CC
rises above the reset threshold or MR returns high.
RESET has a strong pulldown but a relatively weak pullup, and can be wire-OR connected to logic gates.
Valid for V
CC
≥
1V. RESET swings between V
CC
and GND.
RESET
9
Watchdog Output. This CMOS-logic output goes low if WDI remains high or low longer than the watch-
dog-timeout period (t
WD
), and remains low until the next transition of WDI. WDO remains high if WDI is
unconnected. WDO is high during reset. WDO swings between V
CC
and GND. Connect WDO to MR to
generate resets during watchdog faults.
WDO
10
Chip-Enable Output. Output to the chip-enable gating circuit. CE OUT is pulled up to the higher of V
CC
or V
BATT
, when the chip-enable gate is disabled.
CE OUT
11
Chip-Enable Input
CE IN
12
Battery-On Output. CMOS-logic output/external bypass switch driver. High when OUT is connected to
BATT and low when OUT is connected to V
CC
. Connect the base of a PNP transistor or gate of a PMOS
transistor to BATT ON for I
OUT
requirements exceeding 250mA. BATT ON swings between the higher of
V
CC
and V
BATT
and GND.
BATT ON
13
Ground
GND
5
Manual-Reset Input. A logic low on MR asserts reset. Reset remains asserted as long as MR remains low
and for 200ms after MR returns high. MR is an active-low input with an internal pullup to V
CC
. It can be
driven using TTL or CMOS logic, or shorted to ground with a switch. Connect to V
CC
, or leave uncon-
nected if not used.
MR
6
Low-Line Comparator Output. This CMOS-logic output goes low when V
CC
falls to 52mV above the reset
threshold. Use this output to generate an NMI to initiate an orderly shutdown routine when V
CC
is falling.
LOW LINE swings between V
CC
and GND.
LOW LINE
7
Active-High Reset Output. RESET is the inverse of RESET. It is a CMOS output that sources and sinks
current. RESET swings between V
CC
and GND.
RESET
8
Watchdog Input. If WDI remains high or low longer than the watchdog-timeout period (1.6s, typ), WDO
goes low. Leave unconnected to disable the watchdog function.
WDI
4
Input Supply Voltage, nominally +5V. Bypass with a 0.1μF capacitor to GND.
V
CC
3
PIN
Power-Fail Output. This CMOS-logic output goes low when PFI is less than V
PFT
(2.265V). Valid for
V
CC
≥
4V. PFO swings between V
CC
and GND.
PFO
2
Power-Fail Input. When PFI is less than V
PFT
(2.265V), PFO goes low. Connect to ground when unused.
PFI
1
FUNCTION
NAME
Backup-Battery Input. When V
CC
falls below the reset threshold and V
BATT
, OUT switches from V
CC
to
BATT. V
BATT
may exceed V
CC
. The battery can be removed while the MAX807 is powered-up, provided
BATT is bypassed with a 0.1μF capacitor to GND. If no battery is used, connect BATT to ground, and
connect V
CC
and OUT together.
BATT
14
Battery-OK Signal Output. High in normal operating mode when V
BATT
exceeds V
BOK
(2.265V). Valid for
V
CC
≥
4V.
BATT OK
15
Output Supply Voltage to CMOS RAM. When V
CC
exceeds the reset threshold or V
CC
> V
BATT
, OUT is
connected to V
CC
. When V
CC
falls below the reset threshold and V
BATT
, OUT connects to BATT. Bypass
OUT with a 0.1μF capacitor to GND.
OUT
16
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX807MCUE+ | 功能描述:監(jiān)控電路 Full-Featured uPower Supervisor 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 |
| MAX807MCUE+T | 功能描述:監(jiān)控電路 Full-Featured uPower Supervisor 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 |
| MAX807MCUE-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 |
| MAX807MCWE | 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 |
| MAX807MCWE+ | 功能描述:監(jiān)控電路 Full-Featured uPower Supervisor 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 |
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