ELM365

Features:

• Low power CMOS design - typically 1mA at 5V
• Wide supply range - 3.0 to 5.5 volt operation
• Simultaneous monitoring of three circuits
• 45 second delay for entry and exit
• Automatic reset of alarm outputs after 5 minutes
• Status LED output driver
• High current drive outputs - up to 25 mA
• Panic input for instant triggering of the alarm


Application

• Home or cottage security systems
• Auto or RV security systems
• Individual zone monitoring in a multizone system
• High or low limit warning alarms


Specifications

Storage Temperature....................... -65°C to +150°C
Ambient Temperature with
Power Applied....................................-40°C to +85°C
Voltage on VDD with respect to VSS............ 0 to +7.5V
Voltage on any other pin with
respect to VSS........................... -0.6V to (VDD + 0.6V)

Note:
Stresses beyond those listed here will likely damage the device. These values are given as a design guideline only. The ability to operate to these levels is neither inferred nor recommended.


Description

The ELM365 provides all of the logic necessary for a complete security system in an 8 pin package.

The circuit ELM365 is capable of monitoring two normally closed input loops and one normally open panic circuit, provides a constant level and a pulsing alarm output, and the logic to drive a status LED.

ELM365 Internal timers are provided for alarm blocking during zone entry and exit as well as circuit resetting, should alarms go unacknowledged. Debouncing of all of the inputs is also provided internally, to allow for the direct interfacing to mechanical switches.

Due to the digital techniques employed, no external support components are required for any of the timing functions, resulting in considerable cost savings over other designs.