STM1818 STMicroelectronics, STM1818 Datasheet - Page 10

• Manufacturer Part Number: STM1818
• Description: Low Power Reset Circuit
• Manufacturer: STMicroelectronics

Specifications of STM1818

• Operating Temperature: –40 °C to 105 °C
• ± 2.5% Reset Threshold Accuracy: (–40 °C to 105 °C)

Operation
2.5
Note:
Figure 7.
1. RST for STM1812 and STM1817.
Figure 8.
10/25
Valid RST output down to V
When V
circuit. In most systems this is not a problem, as most MCUs do not operate below 1 V.
However, in applications where RST output must be valid down to 0 V, a pull-down resistor
may be added to hold the RST output low (see
enough to not load the RST output, and still be small enough to pull the output to ground.
A 100 kΩ resistor is recommended.
The same situation applies for the active-high RST of the STM1810/1812. A 100 k
resistor to V
Reset timing diagram
Push-button manual reset with MR detect (STM1813/1818)
CC
falls below 1 V, the RST output no longer sinks current, but becomes an open
CC
should be used if RST must remain valid for V
Doc ID11464 Rev 8
CC
STM1810/1811/1812/1813/1815/1816/1817/1818
= 0 V
Figure
11). This resistor must be large
CC
< 1.0 V.
Ω
pull-up