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参数资料
| 型号： | ADM1232A |
| 厂商： | Analog Devices, Inc. |
| 英文描述： | Microprocessor Supervisory Circuit |
| 中文描述： | 微处理器监控电路 |
| 文件页数： | 5/6页 |
| 文件大小： | 86K |
| 代理商： | ADM1232A |
ADM1232A
–5–
REV. 0
STROBE
Timeout Selection
TD or time delay set is used to set the Strobe Timeout Period.
The Strobe Timeout Period is defined as being the maximum
time between high-to-low transitions (Figure 4) that
STROBE
will accept before a reset will be asserted. The Strobe timeout
settings are listed in Table I.
Table I.
Condition
Min
Typ
Max
Units
TD = 0 V
TD = Floating
TD = V
CC
62.5
250
500
150
600
1200
250
1000
2000
ms
ms
ms
STROBE
TIMEOUT PERIOD
STROBE
STROBE
PULSEWIDTH
Figure 4.
STROBE
Parameters
V
CC
RESET
+5V
RESET
+4.5V (5% TRIP POINT)
RESET OUTPUT DELAY
WHEN IS V
CC
FALLING
RESET OUTPUT DELAY
WHEN IS V
CC
RISING
+5V
+4.25V (10% TRIP POINT)
Figure 5. Reset Output Delay
TOLERANCE
The TOLERANCE input is used to determine the level V
CC
can
vary below 5 V without the ADM1232A asserting a reset. Con-
necting TOLERANCE to ground will select a –5% tolerance
level and will cause the ADM1232A to generate a reset if V
CC
falls below 4.75 V (typical). If TOLERANCE is connected to
V
CC
a –10% tolerance level is selected and will cause the
ADM1232A to generate a reset if V
CC
falls below 4.5 V (typical).
Check the parameters for the V
CC
trip point in the ADM1232A
Specifications for more information.
RESET AND
RESET
OUTPUTS
While RESET is capable of sourcing and sinking current,
RESET
is an open drain MOSFET which sinks current only.
Therefore, it is necessary to pull this output high.
CIRCUIT INFORMATION
PB RESET
The
PB RESET
input makes it possible to manually reset a system
using either a standard push-button switch or a logic low
input. An internal debounce circuit provides glitch immunity
when used with a switch, reducing the effects of glitches on the
line. The debounce circuit is guaranteed to cause the ADM1232A
to assert a reset if
PB RESET
is brought low for more than 20 ms
and is guaranteed to ignore low inputs of less than 1 ms.
ADM1232
STROBE
RESET
TOLERANCE
STROBE
GND
TD
ADM1232A
RESET
MICROPROCESSOR
I/O
V
CC
PB RESET
V
CC
Figure 2. Typical Push Button Reset Application
RESET
RESET
PB RESET
V
IL
V
IH
PB RESET
TIME
RESET ACTIVE
TIME
PB RESET
Figure 3.
PB RESET
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PDF描述 |
|---|---|
| ADM1232 | Microprocessor Supervisory Circuit |
| ADM1232AN | Microprocessor Supervisory Circuit |
| ADM1232ARM | Microprocessor Supervisory Circuit |
| ADM1232ARN | Microprocessor Supervisory Circuit |
| ADM1232ARW | Microprocessor Supervisory Circuit |
相关代理商/技术参数 |
参数描述 |
|---|---|
| ADM1232AAN | 制造商:AD 制造商全称:Analog Devices 功能描述:Microprocessor Supervisory Circuit |
| ADM1232AARM | 制造商:AD 制造商全称:Analog Devices 功能描述:Microprocessor Supervisory Circuit |
| ADM1232AARN | 制造商:AD 制造商全称:Analog Devices 功能描述:Microprocessor Supervisory Circuit |
| ADM1232AARNZ | 制造商:Analog Devices 功能描述:Processor Supervisor 5V 8-Pin SOIC N 制造商:Analog Devices 功能描述:RESET GENERATOR I.C. - Rail/Tube 制造商:Analog Devices 功能描述:IC SUPERVISOR FOR CPU 8SOIC 制造商:Analog Devices 功能描述:SUPERVISOR 5V 5%/10% 8SOIC 制造商:Analog Devices 功能描述:SUPERVISOR, 5V, 5%/10%, 8SOIC 制造商:Analog Devices Inc. 功能描述:Supervisory Circuits RESET GENERATOR I.C. 制造商:Analog Devices 功能描述:SUPERVISOR, 20uA, 5.5V, SOIC-8; No. of Supervisors / Monitors:1; Supply Voltage Min:4.5V; Supply Voltage Max:5.5V; Reset Type:Manual, Active-High / Active-Low; Digital IC Case Style:SOIC; No. of Pins:8; Supply Current:20A ;RoHS Compliant: Yes |
| ADM1232AARNZ-REEL | 功能描述:监控电路 RESET GENERATOR I.C. RoHS:否 制造商:Maxim Integrated 监测电压数: 监测电压: 欠电压阈值: 过电压阈值: 输出类型: 人工复位: 监视器: 电池备用开关: 上电复位延迟（典型值）: 电源电压-最大: 最大工作温度: 安装风格: 封装 / 箱体: 封装: |
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