参数资料
| 型号： | AS1923A-BSTT-O |
| 厂商： | ams |
| 文件页数： | 9/17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 - D e t a i l e d D e s c r i p t i o n
8 Detailed Description
The AS1923 is a very small, low-power, quad-voltage microprocessor supervisory circuit designed to maintain system integrity in multi-supply
systems (see Figure 10) . The device offers several factory-trimmed under-voltage threshold values that minimize or eliminate the need for exter-
nal components.
Preset voltage monitoring values of +5.0, +3.3, +3.0, +2.5, +1.8, and -5.0V (see Ordering Information on page 14) are available for a wide range
of applications such as telecommunications equipment, desktop and notebook computers, high-end printers, data storage equipment, and net-
working equipment applications.
The device is powered via the IN2 input (3.0 to 3.3V) and a reset is asserted if V IN1 or V IN2 is > 1V. For improved performance, the AS1923 was
also designed to ignore fast IN x transients.
Figure 10. AS1923 - Block Diagram
4
+
IN1
–
IN1
3V
5
+
5V Pullup
IN2
–
Timeout
(220ms)
3
RESETN
6
+
IN3
–
1
+
IN4
–
Bandgap
Reference
AS1923
Optional on AS1923B Only
The quad-voltage monitor/reset circuitry includes an accurate bandgap reference, four precision comparators, and a series of internal trimmed
resistor-divider networks to set the factory-trimmed reset threshold values.
The resistor networks scale the specified IN x reset voltages to match the internal bandgap reference/comparator voltage. User-adjustable
threshold options bypass the internal resistor networks and connect directly to one of the comparator inputs (an external resistor-divider network
is required for threshold matching).
Each of the internal comparators has a typical hysteresis of 0.5% with respect to its reset threshold. This built-in hysteresis improves device
immunity to ambient noise without significantly reducing threshold accuracy when an input sits at its specified reset voltage.
Note: Threshold voltage options (fixed and adjustable) are designated by the single-letter code in the model number (see Ordering Informa-
Revision 1.01
8 - 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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