ADM1818

Features:

Reliable Low Cost Voltage Monitor with Reset Output
Supports Monitoring of Supplies Within 5%, 10%, 15% and 20% Tolerance
Active High and Low Push-Pull Output Choices
(ADM1810, ADM1812, ADM1815 and ADM1817)
Open Drain Output Choices (ADM1811, ADM1813,
ADM1816 and ADM1818)
Can Be Used with a Manual Push-Button to Generate a
Reset (ADM1813, ADM1818)
Initialize Microprocessor Systems with Added Safety




Application

Microprocessor Systems
Computers
Controllers
Intelligent Instruments
Automotive Systems




Pinout

PIN FUNCTION DESCRIPTIONS
Pin	Mnemonic	Function
1	RST/RST	Reset Output. RST/RST remains active while VCC is below the reset threshold, and remains active for 150 ms (typ) after VCC rises above the reset threshold.
2	VCC	Supply Voltage Being Monitored.
3	GND	0 V. Ground Reference for All Signals.

Specifications

VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .+1.2 V to +5.5 V
Input Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .40 mA
Operating Temperature Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .40°C to +85°C
Power Dissipation, RT-3, SOT-23 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .320 mW
Derate by 4 mW/°C Above +70°C
qJA Thermal Impedance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .333°C/W
Lead Temperature (Soldering, 10 sec) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +300°C
Vapor Phase (60 sec) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +215°C
Infrared (15 sec) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .+220°C
Storage Temperature Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65°C to +150°C
ESD Rating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 kV






Description

The ADM181x range of voltage monitoring circuits can be used in any application where an electronic system needs to be reset when a voltage increases above or below a predetermined value.

Because of the "reset delay time" incorporated into the ADM181x series, these devices can provide a safe startup for electronic systems. Before a system initializes, the power supply must stabilize. Using the ADM181x series ensures that there are typically 150 ms for the power supply to stabilize before the system is reset and safe system initialization begins.

The ADM181x series of microprocessor reset circuits are available in low cost, space-saving SOT-23 packages.