ICM7213 - One Second/One Minute Timebase Generator TM
CT RODU NT LETE P EPLACEME O B SO DR ENDE COMM
One Second/One Minute Timebase Generator
The ICM7213 is a fully integrated micropower oscillator and frequency divider with four buffered outputs suitable for interfacing with most logic families. The power supply may be either a two battery stack (Ni-cad, alkaline, etc.) or a regular power supply greater than 2V. Depending upon the state of the WIDTH, INHIBIT, and TEST inputs, using a 4.194304MHz crystal will produce a variety of output frequencies including 2048Hz, 1024Hz, 34.133Hz, 16Hz, 1Hz, and 1/60Hz (plus composites). The ICM7213 utilizes a very high speed low power metal gate CMOS technology which uses 6.4V zeners between the drains and sources of each transistor and also across the supply terminals. Consequently, the ICM7213 is limited to a 6V maximum VSUPPLY , although a simple dropping network can be used to extend the VSUPPLY range well above 6V (See Figure 9).