75T2090-IP TDK Corporation, 75T2090-IP Datasheet
75T2090-IP
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75T2090-IP Summary of contents
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... Mostek MK5380, but with an improved (tighter) output specification and with the addition of independent latch and reset controls. An additional feature of the 75T2090/2091 is "imprecise" call progress detector. detects the presence of signals in the 305-640 Hz band. BLOCK DIAGRAM (2090/2091 only) LATCH RESET ...
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DTMF Transceivers DESCRIPTION (continued) The 75T2091 also incorporates an early detect function which is useful in multi-channel radio scanning applications. The components necessary for the 75T2089/2090/2091 are a 3.58 MHz “colorburst” crystal with a parallel 1 M resistor. This ...
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RECEIVER OUTPUTS AND THE DE PIN Outputs D0, D1, D2, D3 are CMOS push-pull when enabled (DE low) and open-circuited impedance) when disabled ( DE high). These digital outputs provide the hexadecimal corresponding to the detected digit. Figure 3 shows ...
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... DTMF output. A recommended line interface for this output is shown in Figure 5. CALL PROGRESS DETECTION (75T2090/2091) The 75T2090/2091 have a Call Progress Detector that consists of a bandpass filter and an energy detector for turning the on/off cadences into a microprocessor compatible signal. DET OUTPUT (75T2090/2091) ...
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DIGITAL AND DC REQUIREMENTS The following electrical specifications apply to the digital input and output signals over the recommended operating range unless otherwise noted. The specifications do not apply to the following pins: LIN, DIN, XIN, XOUT, and DTMF OUT. ...
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... Start-Up Time TSU2 Data Set-Up Time THD2 Data Hold Time TRP RESET Pulse Width LATCH Pulse Width TPW CALL PROGRESS DETECTOR: Electrical Characteristics (75T2090/2091 only) Amplitude for Detection Amplitude for No Detection Detect Output "LIN" Input Input Impedance (Continued) CONDITIONS 75T2091 only ...
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... NOTE: THE INDICATED TIME MAY BE AS SMALL AS 0 SEC., MEANING THAT THE LATCH AND RESET LINES MAY BE TIED TOGETHER. FIGURE 8: DTMF Generator 7 75T2089/2090/2091 DTMF Transceivers MIN NOM MAX TON TOFF tone burst 1 tone burst 2 DIN TD1 TR1 DV TSU1 THD1 FIGURE 7: Call Progress Detector (75T2090/2091 only) TRP UNIT ...
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DTMF Transceivers MECHANICAL SPECIFICATIONS 22-Pin DIP 28-Pin PLCC 8 ...
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... TDK Semiconductor Corporation 75T2089/2090/2091 DTMF Transceivers CAUTION: Use handling procedures necessary for a static sensitive component N/C 8 N/C 9 XEN 10 N 75T2091 28-Pin PLCC ORDER NUMBER PACKAGING MARK 75T2089-IP 75T2090-IP 75T2091- LATCH 23 22 N/C 21 N/C 20 RST 19 DET 75T2089-IP 75T2090-IP 75T2091-IH 04/24/00- rev. E ...