参数资料
| 型号： | AS1923A-BSTT-O |
| 厂商： | ams |
| 文件页数： | 11/17页 |
| 文件大小： | 0K |
| 描述： | IC SUPERVISOR QUAD OPEN SOT23-6 |
| 标准包装： | 1 |
| 类型： | 多压监控器 |
| 监视电压数目： | 4 |
| 输出： | 开路漏极或开路集电极 |
| 复位： | 低有效 |
| 复位超时： | 最小为 120 ms |
| 电压 - 阀值： | 2.93V，4.38V，可调，-4.38V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | SOT-23-6 |
| 供应商设备封装： | SOT-23-6 |
| 包装： | 标准包装 |
| 其它名称： | AS1923A-BSTT-ODKR |
AS1923
Datasheet - A p p l i c a t i o n I n f o r m a t i o n
User-Adjustable Thresholds
The AS1923 provides several voltage monitoring values as well as user-adjustable reset thresholds.
The threshold voltage at each adjustable IN x input is typically 1.23V. To monitor a voltage >1.23V, connect a resistor-divider network to the circuit
Figure 13. Setting User-Adjustable Thresholds
V INTH
R 1
+
R 2
For the circuit shown in Figure 13 , calculate R 1 and R 2 as:
+
–
–
V REF =
1.23V
V INTH = 1,23V × -------------------
R 1 = R 2 × ? ---------------- – 1 ?
or, calculated in terms of R 1 :
R 1 + R 2
R 2
V INTH
? 1,23V ?
(EQ 1)
(EQ 2)
Note: Because the AS1923 has a guaranteed input current of ±0.1μA on its adjustable inputs, resistor values up to 100k Ω can be used for
R 2 with <1% error.
Unused Inputs
The IN2 input must always be used for normal operation (AS1923 power-supply pin). Otherwise, in cases where one or more of the AS1923
monitoring inputs will not be used, these inputs must be tied to a supply voltage greater in magnitude than their specified threshold voltages.
Notes:
1. For unused IN3 or IN4 applications with positive thresholds (fixed or adjustable), the inputs can be connected directly to the IN2 supply.
2. For unused IN4 options with negative thresholds, the input must be tied to a more negative supply.
3. Unused pins must not be connected to ground or allowed to float.
Revision 1.01
10 - 16
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相关代理商/技术参数 |
参数描述 |
|---|---|
| AS1923A-BSTT-x | 制造商:AMSCO 制造商全称:austriamicrosystems AG 功能描述:Quad-Voltage Microprocessor Supervisory Circuit |
| AS1923B-BSTT-x | 制造商:AMSCO 制造商全称:austriamicrosystems AG 功能描述:Quad-Voltage Microprocessor Supervisory Circuit |
| AS1925 | 制造商:AMSCO 制造商全称:austriamicrosystems AG 功能描述:Ultra-Low Voltage Microprocessor Supervisory Circuit with Manual Reset |
| AS1925-BSTT | 制造商:AMSCO 制造商全称:austriamicrosystems AG 功能描述:Ultra-Low Voltage Microprocessor Supervisory Circuit with Manual Reset |
| AS1925BSTTD07 | 制造商:ams 功能描述:IC MPU SUPERVISOR 12 uA 1.8V 5-SOT-2 制造商:ams 功能描述:T&R / SOT23-5 |
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