AS1902(2005) 查看數據表（PDF） - austriamicrosystems AG
零件编号
产品描述 (功能)
生产厂家
AS1902 Datasheet PDF : 9 Pages
| |||
AS1901, AS1902, AS1903
Data Sheet
austriamicrosystems
Interfacing to Microprocessors with Bi-Directional Reset Pins
6 Operation
6.1 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).
6.2 Operating Characteristics
Supply Current vs. Tem perature,
VCC=3.3V
0.5
0.4
0.3
0.2
0.1
0
- 40
- 20
0
20
40
60
80
Temperature (°C)
Pow er-Dow n Reset Delay
vs. Tem perature, VOD = 10m V
200
150
100
50
0
-40
-20
0
20
40
60
80
Temperature (°C)
Power-Up Reset Timeout
vs. Temperature
200
160
120
80
40
0
- 40
- 20
0
20
40
60
80
Temperature (°C)
Maximum Transient Duration
vs. Reset Threshold Overdrive
400
300
200
100
0
1
10
100
Reset Threshold Overdrive
Vth-Vcc (mV)
1000
6.3 Negative-Going VDD Transients
The device is optimized to ignore short-duration, negative-going VDD transients (glitches) in order to avoid incorrect
resets.
In the graph Maximum Transient Duration vs. Reset Threshold Overdrive (page 4), the conditions are shown, for which
the reset pulses are not generated. In the graph the maximum pulse width that a negative VDD transient may have
when a reset signal is generated. As the amplitude of the transient increases, the maximum allowable pulse width
decreases.
www.austriamicrosystems.com
Revision 1.5
4-9
Share Link: 