参数资料
型号: ADM823LYRJ-R7
厂商: Analog Devices Inc
文件页数: 1/12页
文件大小: 0K
描述: IC SUPERVISOR W/RESET SOT23-5
产品培训模块: Voltage Supervisor 101
标准包装: 3,000
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: 低有效
复位超时: 最小为 140 ms
电压 - 阀值: 4.63V
工作温度: -40°C ~ 125°C
安装类型: 表面贴装
封装/外壳: SC-74A,SOT-753
供应商设备封装: SOT-23-5
包装: 带卷 (TR)

Supervisory Circuits with Watchdog and
Manual Reset in 5-Lead SC70 and SOT-23
Data Sheet
FEATURES
ADM823/ADM824/ADM825
FUNCTIONAL BLOCK DIAGRAM
Precision 2.5 V to 5 V power supply monitor
7 reset threshold options: 2.19 V to 4.63 V
140 ms (minimum) reset timeout
Watchdog timer with 1.6 sec timeout (ADM823, ADM824)
Manual reset input (ADM823, ADM825)
V CC
ADM823
V REF
RESET
GENERATOR
V CC
RESET
Push-pull output stages
RESET (ADM823)
RESET, RESET (ADM824/ADM825)
MR
DEBOUNCE
WATCHDOG
DETECTOR
Low power consumption: 5 μA
Guaranteed reset output valid to V CC = 1 V
Power supply glitch immunity
Specified over automotive temperature range
5-lead SC70 and SOT-23 packages
APPLICATIONS
Microprocessor systems
Computers
Controllers
Intelligent instruments
Portable equipment
GENERAL DESCRIPTION
GND
WDI
Figure 1.
The ADM823/ADM824/ADM825 are supervisory circuits that
monitor power supply voltage levels and code execution integrity
in microprocessor-based systems. In addition to providing
power-on reset signals, an on-chip watchdog timer can reset the
microprocessor if it fails to strobe within a preset timeout
period. A reset signal can also be asserted by an external push-
button, through a manual reset input. The three parts feature
different combinations of watchdog input, manual reset input,
These parts are available in a choice of seven reset threshold
options ranging from 2.19 V to 4.63 V. The reset and watchdog
timeout periods are fixed at 140 ms (minimum) and 1.6 sec
(typical), respectively.
The ADM823/ADM824/ADM825 are available in 5-lead SC70
and SOT-23 packages and typically consume only 5 μA, making
them suitable for use in low power, portable applications.
and output stage configuration, as shown in Table 1.
Table 1. Selection Table
Output Stage
Part No.
ADM823
ADM824
ADM825
Watchdog Timer
Yes
Yes
Manual Reset
Yes
Yes
RESET
Push-Pull
Push-Pull
Push-Pull
RESET
Push-Pull
Push-Pull
Rev. D
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rights of third parties that may result from its use. Specifications subject to change without notice. No
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