Maker : Xecom
Part No. : XE0068DT

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www.DataSheet4U.com XE0068DT November 2004 FCC Registered DAA Module with DTMF Transmitter/Decoder Description The XE0068DT is an FCC registered telephone line interface which includes a DTMF transmitter, DTMF decoder and call progress monitor. FCC rules limit the signal level that equipment can place on the telephone line. The XE0068DT incorporates an Automatic Gain Control (AGC) circuit to control the output signal level. The AGC optomizes the output levele over a wide variety of input levels without introducing signal distortion. FCC rules also dictate a 2-second delay at the start of each call. This billing delay prevents information transmission during the billing period. The XE0068DT includes this billing delay. The integrated DTMF transceiver, call progress monitor and FCC registration make the XE0068DT ideal for network signalling applications. Features * * * * * * * * * * Small Size - 2.28" x 1.08" x 0.42" User Transferrable FCC Part 68 Registration Integrated Ring Detection Circuit. Solid-State Hookswitch Control Provides 1500 Volt Isolation between the telephone line and all other circuits Includes supplemental surge protection to survive both FCC Type A and Type B surges. Integral 2-Second Billing Delay (required for FCC Part 68 registration) Automatic Gain Control optimizes transmit level for most any input level. Integral DTMF transmitter and decoder Call Progress Monitoring XE0068DT Block Diagram D0 D1 D2 D3 ESt /RD /WR /CS RS0 CP St/GT XE0068DT Pin Configuration VCC o 1 26 o Tip 24 o Ring 22 o /RI 21 o OH 20 o N/C 19 o RCVR 18 o XMIT 17 o St/GT 16 o ESt 15 o CP 14 o GND DTMF Transmitter & Receiver D3 Tip Ring o 2 o 3 o 4 o 5 o 6 D2 D1 D0 /WR Line Transformer Hook Switch OH /RD o 7 /CS o 8 RS0 o 9 o 10 o 11 o 12 o 13 N/C N/C N/C D/V RCVR 2-4 Wire Convertor Ring Detect /RI XMIT AGC D/V Billing Delay Timer XECOM (1) XE0068DT XE0068DT Mechanical Specifications Inches Min Max 2.270 2.290 1.065 1.095 0.420 0.430 0.890 0.910 1.190 1.210 0.125 0.200 0.080 0.100 0.530 0.550 0.090 0.110 0.020 0.025 Metric(MM) Min Max 57.66 58.17 27.05 27.81 12.32 13.08 22.61 23.11 30.23 30.73 3.18 5.08 2.03 2.54 13.46 13.97 2.29 2.79 0.51 0.64 Dim A B C D E F G H J K B Denotes Pin 1 K F C D G H E J H XE0068DT ABSOLUTE MAXIMUM RATINGS Storage Temperature Operating Temperature Range * Maximum Solder Temperature Maximum Time Above Eutectic (183O C) Preheat Dwell Time -25O C to +85O C 0O C to +70O C 220O C 90 seconds 120 to 180 seconds * The XE0068DT can be ordered with an Operating Temperature of -40O C to +85O C at extra cost. Specify Model Number XE0068DT-ITR. XECOM (2) XE0068DT XE0068DT Typical Connection Diagram Recommended Parts Designation C1, C2 FB1, FB2 Description 470 picoFarad, 3000 Volts (Sprague part Number 30GA-T47) Ferrite Beads (TDK part Number CB30-453215B) XE0068DT Call Progress Detection Circuit +5 Volts XE0068DT St/GT 0.1 uFd 10K LM339 10K 10K 374K + 10K ESt CP2 150K 1N4148 1N4148 +5 Volts 0.15 uFd 1M To IRQ XECOM (3) XE0068DT XE0068DT Pin Descriptions PIN 1 2-5 6 7 8 9 13 14 15 NAME VCC D0-D3 /WR /RD /CS RS0 D/V GND CP I/0 --I/O I I I I I --O DESCRIPTION +5 Volts These signals represent the 4-bit data bus which carries the DTMF information per the chart below. Read and Write determine the direction of DTMF data. A low on /WR with /RD high allows the processor to write to the XE0068DT. Read and Write determine the direction of DTMF data. A low on /RD with /WR high allows the processor to read from the XE0068DT. A low on Chip Select, selects the XE0068 DTMF data bus. This input selects the register to be used. A low selects the data register and a high slects the status or control registers. A low on Voice/Data selects a transmit level of 0 dBm for voice or DTMF; a high sets a -9 dbm transmit level for data transfer. Ground In DTMF mode CP acts as an interrupt. CP goes low when a valid DTMF Tone is transmitted or received. In Call Progress Mode CP provides a square wave represen...

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