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参数资料
| 型号： | ADM812 |
| 厂商： | Analog Devices, Inc. |
| 英文描述： | Microprocessor Supervisory Circuits(微处理器监控电路) |
| 中文描述： | 微处理器监控电路（微处理器监控电路） |
| 文件页数： | 5/6页 |
| 文件大小： | 212K |
| 代理商： | ADM812 |
ADM811/ADM812
5
Advance Technical Information
INTERFACING TO OTHER DEVICES
OUTPUT
The ADM811 and ADM812 series is designed to integrate
with as many devices as possible. One feature of the
ADM811 and ADM812 is the reset output which is directily
proportional to V
cc
(this is guaranteed only while V
cc
is
greater than 1V). This enables the part to be used in both
3V and 5V or any Nominal Voltage within the Minimum
and Maximum Specifications for V
cc
.
Because of this design approach, the ADM811 and
ADM812 is capable of operating correctily in any circuit
where the reset output voltages are required to be between
ground or V
cc.
ENSURING A VALID RESET OUTPUT DOWN TO
V
CC
=0V
When Vcc falls below 0.8V, ADM811s
RESET
no longer
sinks current. Therefore a high impedance CMOS logic in-
put connected to Reset may drift to undetermined logic lev-
els. To eliminate this problem a 100K
W
Resistor should be
connected from
RESET
to ground.
THE BENEFITS OF A VERY ACCURATE RESET
THRESHOLD
In other Microprocessor Reset Circuits, tolerances in sup-
ply voltages can lead to an overall increase in Reset
tolerence levels due to inappropriate power supply levels at
the Microprocessor supervisory circuit power supply.
Because the ADM811 and ADM812 series can operate
effectively even when there are large degradations of the
supply voltages, the possibility
Figure 10.
Ensuring a Valid Reset Output Down to
V
cc
=0V
VC C
VC C
GND
R ESET
AD M8 11
Figure 1. Power Fail Reset Timing
t
1
t
1
= RESET TIME = 240MS TYP.
VREF = RESET VOLTAGE THRESHOLD
VREF
t
1
V
C C
RESET
VREF
VREF
VREF
ORDERING GUIDE
Reset
Threshold
Temperature
Range
Brand
Information
Model*
Quantity
ADM811LART-REEL
ADM811LART-REEL-7
ADM811MART-REEL
ADM811MART-REEL-7
ADM811TART-REEL
ADM811TART-REEL-7
ADM811SART-REEL
ADM811SART-REEL-7
ADM811RART-REEL
ADM811RART-REEL-7
ADM812LART-REEL
ADM812LART-REEL-7
ADM812MART-REEL
ADM812MART-REEL-7
ADM812TART-REEL
ADM812TART-REEL-7
ADM812SART-REEL
ADM812SART-REEL-7
ADM812RART-REEL
ADM812RART-REEL-7
4.63 V
4.63 V
4.38 V
4.38 V
3.08 V
3.08 V
2.93 V
2.93 V
2.63 V
2.63 V
4.63 V
4.63 V
4.38 V
4.38 V
3.08 V
3.08 V
2.93 V
2.93 V
2.63 V
2.63 V
40°C to +85°C
40°C to +85°C
40°C to +85°C
40°C to +85°C
40°C to +85°C
40°C to +85°C
40°C to +85°C
40°C to +85°C
40°C to +85°C
40°C to +85°C
40°C to +85°C
40°C to +85°C
40°C to +85°C
40°C to +85°C
40°C to +85°C
40°C to +85°C
40°C to +85°C
40°C to +85°C
40°C to +85°C
40°C to +85°C
9LXX
9LXX
9MXX
9MXX
9TXX
9TXX
9SXX
9SXX
9RXX
9RXX
ALXX
ALXX
AMXX
AMXX
ATXX
ATXX
ASXX
ASXX
ARXX
ARXX
10K
3K
10K
3K
10K
3K
10K
3K
10K
3K
10K
3K
10K
3K
10K
3K
10K
3K
10K
3K
*Only available in Reels.
of a malfunction during a power failure is greatly reduced.
Another advantage of the ADM811 and ADM812 Series is
its very accurate internal voltage reference circuit.
Combined, these benifits produce an exceptionally reliable
Microprocessor Supervisory Circuit.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| ADM812LART | 制造商:AD 制造商全称:Analog Devices 功能描述:Microprocessor Supervisory Circuit in 4-Lead SOT-143 with DSP |
| ADM812LART-REEL | 功能描述:IC SUPERVSR W/RESET 4.63V SOT143 RoHS:否 类别:集成电路 (IC) >> PMIC - 监控器 系列:- 标准包装:3,000 系列:- 类型:简单复位/加电复位 监视电压数目:1 输出:推挽式，图腾柱 复位:高有效 复位超时:最小为 100 ms 电压 - 阀值:3.06V 工作温度:-40°C ~ 105°C 安装类型:表面贴装 封装/外壳:SC-70，SOT-323 供应商设备封装:SC-70-3 包装:带卷 (TR) 其它名称:ADM1817-5AKSREEL7 |
| ADM812LART-REEL7 | 功能描述:IC SUPERVSR W/RESET 4.63V SOT143 RoHS:否 类别:集成电路 (IC) >> PMIC - 监控器 系列:- 标准包装:400 系列:- 类型:备用电池电路 监视电压数目:1 输出:开路漏极，推挽式 复位:高有效/低有效 复位超时:最小为 35 ms 电压 - 阀值:4.65V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:16-SOIC（0.295"，7.50mm 宽） 供应商设备封装:16-SOIC W 包装:带卷 (TR) 其它名称:ADM691ARZ-REEL7TR |
| ADM812LART-REEL-7 | 制造商:AD 制造商全称:Analog Devices 功能描述:Microprocessors Supervisory Circuit in 4-Lead SOT-143 |
| ADM812LARTZ-REEL | 功能描述:IC SUPERVISOR RESET 4.63V SOT143 RoHS:是 类别:集成电路 (IC) >> PMIC - 监控器 系列:- 标准包装:3,000 系列:- 类型:简单复位/加电复位 监视电压数目:1 输出:推挽式，图腾柱 复位:高有效 复位超时:最小为 100 ms 电压 - 阀值:3.06V 工作温度:-40°C ~ 105°C 安装类型:表面贴装 封装/外壳:SC-70，SOT-323 供应商设备封装:SC-70-3 包装:带卷 (TR) 其它名称:ADM1817-5AKSREEL7 |
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