TCM5087

The TCM5087 is designed as tone encoder CMOS ntegrated circuit which specifically to generate the dial tones used in dual-tone telephone dialing systems. It requires a sine-wave input normally supplied by a low-cost TV color-burst crystal at 3.579545MHz to generate eight different audio sinusoidal frequencies.

TCM5087 has many features. (1)Low cost TV color-burst crystal sine-wave input produces highly accurate and stable tones. (2)Device powered directly by telephone or small satteries. (3)Keyboard or electronic input capability. (4)Dual-tone and single-tone capability. (5)Minimal stardby power requirement. (6)Total harmonic distortion meets EIA standard RS-470. (7)PEP3 processing available. (8)Wide supply-voltage range. (9)Minimum parts required. (10)Single-tone production can be inhibited. (11)Auxiliary switching outputs: one bipolar transistor and one CMOS gate. And so on.

Some absolute maximum ratings TCM5087 have been concluded into several points as follow. (1)Its supply voltage Vdd would be 13.5V. (2)Its input voltage range would be from -0.3V to Vdd+0.3V. (3)Its output voltage range would be from -0.3V to Vdd+0.3V. (4)Its continuous power dissipation at 25°C free-air temperature would be 1150mW. (5)Its operating free-air temperature range would be from -30°C to 70°C. (6)Its storage temperature range would be from -55°C to 150°C. (7)Its lead temperature 1.6mm from case for 10 seconds would be 260°C. It should be noted that stresses above those listed in absolute maximum ratings may cause permanent damage to device.

Also some electrical characteristics TCM5087 are concluded as follow. (1)Its column or row input would be min 10kohms. (2)Its single tone enable input resistance to Vdd would be min 20kohms and max 100kohms. (3)Its high level output voltage mute output would be min 2V at Vdd=3V and would be min 9V at Vdd=10V. (4)Its low level output voltage mute output would be max 0.5V. (5)Its off-state current transmitter switch output would be max 10uA.  And so on. If you have any question or suggestion or want to know more information please contact us for TCM5087 details. Thank you!