参数资料
型号: ADM812TARTZ-REEL
厂商: Analog Devices Inc
文件页数: 8/12页
文件大小: 0K
描述: IC SUPERVISOR RESET 3.08V SOT143
标准包装: 10,000
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: 高有效
复位超时: 最小为 140 ms
电压 - 阀值: 3.08V
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: TO-253-4,TO-253AA
供应商设备封装: SOT-143
包装: 带卷 (TR)

ADM811/ADM812
INTERFACING TO OTHER DEVICES
OUTPUT
The ADM811/ADM812 are designed to integrate with as many
devices as possible. One feature of the ADM811/ADM812 is the
reset output, which is directly proportional to V CC (this is guar-
anteed only while V CC is greater than 1 V). This enables the part
to be used with both 3 V and 5 V, or any nominal voltage within
the minimum and maximum specifications for V CC .
BENEFITS OF A VERY ACCURATE RESET
THRESHOLD
Because the ADM811/ADM812 can operate effectively even
when there are large degradations of the supply voltages, the
possibility of a malfunction during a power failure is greatly
reduced. Another advantage of the ADM811/ADM812 is its
very accurate internal voltage reference circuit. Combined,
these benefits produce an exceptionally reliable microprocessor
supervisory circuit.
Data Sheet
V CC
V CC
ADM811
RESET
GND
Figure 11. Ensuring a Valid RESET Output Down to V CC = 0 V
ENSURING A VALID RESET/RESET
OUTPUT DOWN TO V CC = 0 V
When V CC falls below 0.8 V, the RESET/RESET of the ADM811/
ADM812 no longer sinks current. Therefore, a high impedance
CMOS logic input connected to RESET/RESET can drift to
undetermined logic levels. To eliminate this problem, a 100 k?
resistor should be connected from RESET/RESET to ground.
Rev. G | Page 8 of 12
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