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| 型号： | AS1905-C26-T |
| 厂商： | ams |
| 文件页数： | 7/10页 |
| 文件大小： | 0K |
| 描述： | IC SUPERVISOR ACT HIGH SOT23-3 |
| 标准包装： | 1 |
| 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 60 ms |
| 电压 - 阀值： | 2.63V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | TO-236-3，SC-59，SOT-23-3 |
| 供应商设备封装： | SOT-23-3 |
| 包装： | 标准包装 |
| 其它名称： | AS1905-C26-TDKR |
AS1904, AS1905, AS1906
Data Sheet - D e t a i l e d D e s c r i p t i o n
8 Detailed Description
Interfacing to Microprocessors with Bi-Directional Reset Pins
The device has an open drain RESETN output, which enables easy interfacing to microprocessors (μP) with bi-direc-
tional reset pins, such as the Motorola 68HC11. The RESETN pin of the microcontroller (μC) can be connected directly
to the μP supervisor's RESETN output with a single pull-up resistor (see Figure 1 on page 1).
Negative-Going VDD Transients
The device is optimized to ignore short-duration, negative-going V DD transients (glitches) in order to avoid incorrect
resets.
In the graph Maximum Transient Duration vs. Reset Threshold Overdrive (page 6) , the conditions are shown, for
which the reset pulses are not generated. In the graph the maximum pulse width that a negative V DD transient may
have when a reset signal is generated. As the amplitude of the transient increases, the maximum allowable pulse width
decreases.
Options
Table 4. Coding of Factory-trimmed Reset Active Time-Out Period
Device
AS190x_xx
AS190x_xx
AS190x_xx
AS190x_xx
Suffix
A
B
C
D
Min
3
12
60
300
t TP in Milliseconds
Typ
5
20
100
500
Max
8
32
160
800
Table 5. Output Variants
Device
AS1904xxx
AS1905xxx
AS1906xxx
Output Functionality
Active Low (RESETN)
Active High (RESET)
Open Drain (RESETN)
Table 6. Coding of Factory-Trimmed Reset Threshold Voltages
Reset Threshold Voltage, V TH in V
Device
Suffix
T A = +25°C
T A = -40 to +85°C
Min
Typ
Max
Min
Max
AS190xx__
AS190xx__
AS190xx__
AS190xx__
AS190xx__
AS190xx__
AS190xx__
AS190xx__
AS190xx__
AS190xx__
22
23
24
25
26
27
28
29
30
31
2.167
2.285
2.364
2.463
2.591
2.660
2.758
2.886
2.955
3.034
2.2
2.32
2.4
2.5
2.63
2.7
2.8
2.93
3.0
3.08
2.233
2.355
2.436
2.538
2.669
2.741
2.842
2.974
3.045
3.126
2.145
2.262
2.340
2.438
2.564
2.633
2.730
2.857
2.925
3.003
2.255
2.378
2.460
2.563
2.696
2.768
2.870
3.003
3.075
3.157
www.austriamicrosystems.com
Revision 1.41
6-9
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