STM1812LRWX7F STMICROELECTRONICS [STMicroelectronics], STM1812LRWX7F Datasheet - Page 4

• Manufacturer Part Number: STM1812LRWX7F
• Description: Low power reset circuit
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

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Package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Logic diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
SOT23-3 connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Hardware hookup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Push-pull active-low output (STM1810/1812/1815/1817) . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Open drain, active-low output (STM1811/1816) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Open drain, active-low output (bidirectional, manual reset detect, STM1813/1818) . . . . . . 7
Reset timing diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Push-button manual reset with MR detect (STM1813/1818) . . . . . . . . . . . . . . . . . . . . . . . 10
Manual reset timing diagram, switch bounce/debounce (STM1813/1818) . . . . . . . . . . . . . 11
Interfacing MCUs with bidirectional reset pins (RST, open drain, STM1811/1816) . . . . . . 11
Valid reset (RST) output down to V
Valid reset (RST) output down to V
Supply current vs. temperature (no load) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Normalized reset time-out period (t
- V
V
Voltage output low vs. I
Voltage output high vs. I
Normalized reset threshold vs. temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Max transient duration NOT causing reset pulse vs. reset threshold overdrive . . . . . . . . . 16
AC testing input/output waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
SOT23-3 – 3-lead small outline transistor package outline . . . . . . . . . . . . . . . . . . . . . . . . 20
CC
OD
-to-reset output delay vs. temperature - V
= V
TH
– V
CC
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
SINK
SOURCE
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
rec
CC
CC
) vs. temperature
= 0 V (push-pull). . . . . . . . . . . . . . . . . . . . . . . . . . . 11
= 0 V (push-pull). . . . . . . . . . . . . . . . . . . . . . . . . . . 12
STM1810/1811/1812/1813/1815/1816/1817/1818
OD
= V
TH
– V
CC
. . . . . . . . . . . . . . . . . . . . . 14