75t204 ETC-unknow, 75t204 Datasheet
75t204
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75t204 Summary of contents
Page 1
... The only external components required are an inexpensive 3.58-MHz television “colorburst” crystal for frequency reference and a bias resistor. An Alternate Time Base (ATB) is provided to permit operation 75T204's from a single crystal. The 75T204 employs state-of- the-art "switched-capacitor" resulting in approximately 40 poles of filtering, and digital circuitry on the same CMOS chip ...
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... XIN and XOUT 10% resistor is also connected between these pins. In this mode, ATB is a clock frequency output. Other 75T204’s (or 75T202's) may use the same frequency reference by tying their ATB pins to the ATB of a crystal connected device. XIN and XEN of the auxiliary devices must then be tied high and low respectively ...
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... V P VIN < Analog >100 k GND FIGURE 1: Input Coupling XIN 10 75T204 ATB 11 XIN Connected 75T204 Devices FIGURE 2: Crystal Connections 5V Low-Power Subscriber DTMF Receiver V P VIN > VP 0.01 µF 7 Analog >100 k GND VP XOUT 9 XEN 6 XEN 6 3 75T204 ...
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... Low-Power Subscriber DTMF Receiver DTMF DIALING MATRIX See Figure 3. Please note that column 3 is for special applications and is not normally used in telephone dialing. Analog Tone burst 1 Input tD D1, D2, D4 Col 0 Col 1 Col Row Row Row Row 3 ...
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... DETECTION FREQUENCY Low Group f 0 Row 0 = 697 Hz Row 1 = 770 Hz Row 2 = 852 Hz Row 3 = 941 Hz 75T204 TIMING (Refer to Figure 4.) PARAMETER t Tone Time ON t Pause Time OFF t Detect Time D t Release Time R t Data Setup Time SU t Data Hold Time H Output Enable Time Output Disable Time ...
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... Low-Power Subscriber DTMF Receiver APPLICATION INFORMATION The 75T204 will tolerate total input RMS noise up to 12dB below the lowest amplitude tone. telephone applications, the combination of the high frequency attenuation of the telephone line and internal band-limiting make special circuitry at the input to the 75T204 unnecessary. However, noise ...
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... MITEL tape #CM 7290 V ³V ³V - 100K ||15pF 7 5V Low-Power Subscriber DTMF Receiver All 75T204 unused inputs must be RATING +7V - +85 C Ambient - +150 C 65mW (V + 0.5V) to -0. .5V 10V ±1.0mA 300 C MIN ...
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... Low-Power Subscriber DTMF Receiver MECHANICAL SPECIFICATIONS 14-Pin DIP 16-Pin SOL 8 ...
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... ANALOG IN 8 ORDER NUMBER 75T204-IP 75T204-IL 9 75T204 DTMF Receiver CAUTION: Use handling procedures necessary for a static sensitive component N 75T204 N/C ATB 5 12 XIN N XOUT XEN 7 10 GND 8 9 16-Pin SOL PACKAGING MARK 75T204-IP 75T204-IL 04/24/00- rev. C ...