M-993

M-993 Region 1 MF Tone Generator Features Generates standard CCITT R1 MF tones Digital input control Linear (analog) output Power output capable of driving standard line 14-pin DIP Single 5-Volt supply Inexpensive 3.58 MHz time base Applications Telephone systems Test equipment Description The M-993 is a monolithic CMOS integrated circuit designed to generate multifrequency (MF) tone pairs for use in trunk signaling. The tones generated conform to CCITT R1 signal recommendations and to AT&T MF standards. The M-993 permits design engineers to implement a highly accurate MF sender with a minimum of space, power, and added components. The accuracy of the tone frequencies is assured through use of an easily obtained 3.58 MHz color burst crystal or an external 3.58 MHz clock source. Ordering Information Part # M-993 Description 14-pin plastic DIP Pin Diagram Block Diagram DS-M993-R1 www.clare.com 1 M-993 Absolute Maximum Ratings Storage Temperature Operating Ambient Temperature VDD Any Input Voltage -55 to 125°C -25 to 70°C 7.0V VSS - 0.6 to VDD + 0.6V Absolute Maximum Ratings are stress ratings. Stresses in excess of these ratings can cause permanent damage to the device. Functional operation of the device at these or any other conditions beyond those indicated in the operational sections of this data sheet is not implied. Exposure of the device to the absolute maximum ratings for an extended period may degrade the device and effect its reliability. Note...