STM1818TWX7F STMicroelectronics, STM1818TWX7F Datasheet - Page 4

• Manufacturer Part Number: STM1818TWX7F
• Description: IC MPU RESET CIRCUIT 3.06V SOT23
• Manufacturer: STMicroelectronics
• Type: Simple Reset/Power-On Resetr

Specifications of STM1818TWX7F

• Number Of Voltages Monitored: 1
• Output: Open Drain or Open Collector
• Reset: Active Low
• Reset Timeout: 100 ms Minimum
• Voltage - Threshold: 3.06V
• Operating Temperature: -40°C ~ 105°C
• Mounting Type: Surface Mount
• Package / Case: SOT-23-3
• Monitored Voltage: 3 V or 3.3 V or 5 V
• Undervoltage Threshold: 2.98 V
• Overvoltage Threshold: 3.15 V
• Manual Reset: Resettable
• Watchdog: No
• Battery Backup Switching: No
• Supply Voltage (max): 5.5 V
• Supply Voltage (min): 1.2 V
• Supply Current (typ): 16 uA
• Maximum Power Dissipation: 320 mW
• Mounting Style: SMD/SMT
• Maximum Operating Temperature: + 105 C
• Chip Enable Signals: No
• Minimum Operating Temperature: - 40 C
• Output Type: Active Low or Open Drain
• Power Fail Detection: No
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 497-4796-2

List of figures
List of figures
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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
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
-to-reset output delay vs. temperature - V
SINK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
SOURCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Doc ID11464 Rev 8
rec
CC
CC
) vs. temperature - V
= 0 V (push-pull). . . . . . . . . . . . . . . . . . . . . . . . . . . 11
= 0 V (push-pull). . . . . . . . . . . . . . . . . . . . . . . . . . . 12
STM1810/1811/1812/1813/1815/1816/1817/1818
OD
= V
TH
– V
OD
CC
= V
. . . . . . . . . . . . . . . . . . . . . 14
TH
– V
CC
. . . . . . . . . . . 13