參數(shù)資料
型號(hào)： ADM709
廠商： Analog Devices, Inc.
英文描述： Power Supply Monitor with Reset
中文描述： 電源監(jiān)視器復(fù)位
文件頁數(shù)： 3/4頁
文件大?。?/td> 224K
代理商： ADM709
ADM709
REV. 0
–3–
RESET
at Voltages < 1 V
The ADM709
RESET
output is guaranteed to operate with
supply voltages as low as 1 V. If it is desired that the
RESET
output remains low below 1 V, then a pull-down resistor should
be connected between the
RESET
output and GND. A resistor
of 100 k
is suitable. This is illustrated in Figure 5.
R1
RESET
ADM709
GND
Figure 5.
RESET
Valid @ V
CC
< 1 V
Glitch Immunity
The ADM709 is immune to short transients which may occur
on the V
CC
line. This is important so that spurious resets are not
generated as a result of minor glitches on the power supply.
Additional glitch immunity may be obtained by connecting a
capacitor (0.1
μ
F or greater) as close as possible to the V
CC
pin
on the device.
Microprocessors with Bidirectional I-O
Some microprocessors or microcontrollers such as the
MC68HC11 have bidirectional reset lines. In order to avoid
signal contention, a resistor of 4.7 k
should be connected
between the ADM709
RESET
output and the microcontroller
RESET
line. This arrangement is shown in Figure 6.
RESET
ADM709
GND
GND
μP
BUFFERED
RESET
+5V
RESET
V
CC
Figure 6. Interfacing to Microprocessors with
Bidirectional
RESET
V
CC
RESET
ADM709
V
TH
RESET
GENERATOR
GND
Figure 1. Functional Block Diagram
RESET
ADM709
GND
GND
μP
RESET
V
CC
V
CC
Figure 2. Typical Operating Circuit
CIRCUIT INFORMATION
RESET
Output
RESET
is an active low output which provides a reset signal to
the microprocessor whenever the V
CC
supply voltage is below
the reset threshold. An internal timer holds
RESET
low for
140 ms after the voltage on V
CC
rises above the threshold. This
is intended as a power-on reset signal for the processor. It allows
time for the power supply and microprocessor to stabilize after
power up. Similarly a power supply brownout will initiate a pro-
cessor reset. On power-down, the
RESET
output remains low
with V
CC
as low as 1 V. This ensures that the microprocessor is
held in a stable shutdown condition as the power supply drops.
VRT
VRT
t
RS
V
CC
RESET
Figure 3. Power Off/On
RESET
Timing
V
CC
RESET
400ms/DIV
Figure 4.
RESET
Output vs. V
CC
相關(guān)PDF資料
PDF描述
ADM709MAN Analog Switch / Multiplexer (Mux) IC; Analog Switch Function:Analog Switch; Package/Case:20-DIP; Leaded Process Compatible:No; Leakage Current:0.25nA; On Resistance, Rds(on):45ohm; Peak Reflow Compatible (260 C):No RoHS Compliant: No
ADM709MAR IC, QUAD SPDT ANALOG SW
ADM709SAN Power Supply Monitor with Reset
ADM709SAR Power Supply Monitor with Reset
ADM709LAN Power Supply Monitor with Reset
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
ADM709LAN 功能描述:IC SUPERVISOR MPU 4.65 8DIP RoHS:否 類別:集成電路 (IC) >> PMIC - 監(jiān)控器 系列:- 標(biāo)準(zhǔn)包裝:400 系列:- 類型:備用電池電路 監(jiān)視電壓數(shù)目:1 輸出:開路漏極，推挽式 復(fù)位:高有效/低有效 復(fù)位超時(shí):最小為 35 ms 電壓 - 閥值:4.65V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:16-SOIC（0.295"，7.50mm 寬） 供應(yīng)商設(shè)備封裝:16-SOIC W 包裝:帶卷 (TR) 其它名稱:ADM691ARZ-REEL7TR
ADM709LANZ 功能描述:IC SUPERVISOR MPU 4.65V RS 8DIP RoHS:是 類別:集成電路 (IC) >> PMIC - 監(jiān)控器 系列:- 其它有關(guān)文件:STM6717 View All Specifications 標(biāo)準(zhǔn)包裝:1 系列:- 類型:多壓監(jiān)控器 監(jiān)視電壓數(shù)目:2 輸出:開路漏極或開路集電極 復(fù)位:低有效 復(fù)位超時(shí):最小為 600 ms 電壓 - 閥值:1.11V，3.075V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:SC-74A，SOT-753 供應(yīng)商設(shè)備封裝:SOT-23-5 包裝:Digi-Reel® 產(chǎn)品目錄頁面:1194 (CN2011-ZH PDF) 其它名稱:497-7019-6
ADM709LAR 功能描述:IC SUPERVISOR MPU 4.65 8SOIC RoHS:否 類別:集成電路 (IC) >> PMIC - 監(jiān)控器 系列:- 標(biāo)準(zhǔn)包裝:400 系列:- 類型:備用電池電路 監(jiān)視電壓數(shù)目:1 輸出:開路漏極，推挽式 復(fù)位:高有效/低有效 復(fù)位超時(shí):最小為 35 ms 電壓 - 閥值:4.65V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:16-SOIC（0.295"，7.50mm 寬） 供應(yīng)商設(shè)備封裝:16-SOIC W 包裝:帶卷 (TR) 其它名稱:ADM691ARZ-REEL7TR
ADM709LAR-REEL 功能描述:IC SUPERVISOR MPU 4.65V RS 8SOIC RoHS:否 類別:集成電路 (IC) >> PMIC - 監(jiān)控器 系列:- 標(biāo)準(zhǔn)包裝:400 系列:- 類型:備用電池電路 監(jiān)視電壓數(shù)目:1 輸出:開路漏極，推挽式 復(fù)位:高有效/低有效 復(fù)位超時(shí):最小為 35 ms 電壓 - 閥值:4.65V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:16-SOIC（0.295"，7.50mm 寬） 供應(yīng)商設(shè)備封裝:16-SOIC W 包裝:帶卷 (TR) 其它名稱:ADM691ARZ-REEL7TR
ADM709LARZ 功能描述:IC SUPERVISOR MPU 4.65 8SOIC RoHS:是 類別:集成電路 (IC) >> PMIC - 監(jiān)控器 系列:- 其它有關(guān)文件:STM6717 View All Specifications 標(biāo)準(zhǔn)包裝:1 系列:- 類型:多壓監(jiān)控器 監(jiān)視電壓數(shù)目:2 輸出:開路漏極或開路集電極 復(fù)位:低有效 復(fù)位超時(shí):最小為 600 ms 電壓 - 閥值:1.11V，3.075V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:SC-74A，SOT-753 供應(yīng)商設(shè)備封裝:SOT-23-5 包裝:Digi-Reel® 產(chǎn)品目錄頁面:1194 (CN2011-ZH PDF) 其它名稱:497-7019-6
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