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PDF STM811 Data sheet ( Hoja de datos )
| Número de pieza | STM811 | |
| Descripción | (STM809 - STM812) Reset Circuit | |
| Fabricantes | ST Microelectronics | |
| Logotipo |  |
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STM809, STM810
STM811, STM812
Reset Circuit
FEATURES SUMMARY
■ PRECISION MONITORING OF 3V, 3.3V, and
5V SUPPLY VOLTAGES
■ TWO OUTPUT CONFIGURATIONS
– Push-pull RST Output (STM809/811)
– Push-pull RST Output (STM810/812)
■ 140ms RESET PULSE WIDTH (MIN)
■ LOW SUPPLY CURRENT - 6µA (TYP)
■ GUARANTEED RST/RST ASSERTION
DOWN TO VCC = 1.0V
■ OPERATING TEMPERATURE:
–40°C to 85°C (Industrial Grade)
■ LEAD-FREE, SMALL SOT23 and SOT143
PACKAGE
Table 1. Device Options
Active-
Low
RESET
Active-
High
RESET
STM809
✔
STM810
✔
STM811
✔
STM812
✔
Manual
RESET
Input
✔
✔
Package
SOT23-3
SOT23-3
SOT143-4
SOT143-4
Figure 1. Packages
SOT23-3 (WX)
SOT143-4 (W1)
November 2004
1/18
1 page  
Figure 7. Hardware Hookup
VCC
Push-button
RESET
VCC
STM809/810/
811/812
MR(2)
RST(1)
VSS
Note: 1. STM809/811 only (RST for STM810/812)
2. STM811/812 only
STM809/810/811/812
VCC
MCU
RESET
Input
VSS
AI07836
5/18
5 Page 
STM809/810/811/812
DC AND AC PARAMETERS
This section summarizes the operating measure-
ment conditions, and the DC and AC characteris-
tics of the device. The parameters in the DC and
AC characteristics Tables that follow, are derived
from tests performed under the Measurement
Conditions summarized in Table 4., Operating and
AC Measurement Conditions. Designers should
check that the operating conditions in their circuit
match the operating conditions when relying on
the quoted parameters.
Table 4. Operating and AC Measurement Conditions
Parameter
VCC Supply Voltage
Ambient Operating Temperature (TA)
Input Rise and Fall Times
Input Pulse Voltages
Input and Output Timing Ref. Voltages
STM809/810/811/812
1.0 to 5.5
–40 to 85
≤5
0.2 to 0.8VCC
0.3 to 0.7VCC
Unit
V
°C
ns
V
V
Figure 14. AC Testing Input/Output Waveforms
0.8VCC
0.2VCC
0.7VCC
0.3VCC
AI02568
Figure 15. MR Timing Waveform
MR
tMLRL
RST (1)
tMLMH
Note: 1. RST for STM810/812
trec
AI07837a
11/18
11 Page | ||
| Páginas | Total 18 Páginas | |
| PDF Descargar | [ Datasheet STM811.PDF ] | |
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