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The MC14600 Alarm IC is designed to simplify the process of interfacing an alarm level voltage condition to a piezoelectric horn and/or LED. With an extremely low average current requirement and an integrated low battery detect feature, the part is ideally suited to battery operated applications. The MC14600 is easily configured with a minimum number of external components to serve a wide range of applications and circuit configurations. Typical applications include intrusion alarms, moisture or water ingress alarms, and personal safety devices. More reference about it or other similar models can click Kynix Semiconductor. MC14600.pdf
The M28W640FCT and M28W640FCB are 64 Mbit (4 Mbit x 16) non-volatile Flash memories that can be erased electrically at block level and programmed in-system on a Word-by-Word basis using a 2.7V to 3.6V VDD supply for the circuitry and a 1.65V to 3.6V VDDQ supply for the Input/Output pins. An optional 12V VPP power supply is provided to speed up customer programming. More details:http://www.icchipword.com/article/M28W640FCB70N6E-Datasheet-PDF-NOR-Flash-PARELLEL-STD-FLASH-64-MEG-TRAY-STMICRO.html NUMXS00109-1.pdf