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| DATA BULLETIN MX623 * MX*COM MiXed Signal CMOS * Custom Tone Decoder (13 Call-Progress Frequencies Recognized) * Operates to a 3.579545MHz Telephone System Clock * Operates Under Simple Logic or Processor System Control Line-Powered Call Progress Tone Detector PRELIMINARY INFORMATION * Measures Call Progress Tone Frequencies (`Busy', `Dial', `Fax-Tone' etc.) * Telephone, PABX, Fax and Dial-Up Modem Applications * Low-Power Requirement (600A at 3.3 VoltsTYP) for Line-Powered Applications VDD SIGNAL IN DIGITAL FILTER LIMITER AVAILABLE PACKAGES MEASUREMENT AND DECODE V SS CHIP SELECT XTAL/CLOCK XTAL/CLOCK OSCILLATOR Clocks Clocks DATA CHANGE XTAL HOLD DATA OUTPUTS CONTROL CIRCUITRY TIMER PURS OUTPUT LATCHES Q0 Q1 Q2 Q3 MX623P 16-pin PDIP IRQ The MX623 is a low-power decoding integrated circuit that measures the frequency of telephone system call progress tones. With progress signals input from the telephone line, this single-chip product is programmed to recognize up to thirteen of the World's most commonly used call-progress frequencies, analyze signal quality, and present the measured result as a 4-bit parallel data word at the tri-state Data Output. Using the parallel information from the MX623, the host system, can recognize such call progress information as: `Dial', `Busy', `Number Unobtainable', `Ringing' and Fax/Modem system signals. This information can then be used in simple or complex applications to control telephone operations. The data output will require a software format that can analyze the frequency information from the MX623. Requiring only a single 3.0[MIN] volt power supply, the MX623 may be line-powered and will operate under simple logic or system Processor control using the 'Data-Change, 'Hold' and 'Chip-Select' functions. The MX623, whose small size and low power consumption makes it ideal for remote applications, requires a 3.579545MHz telephone system clock or Xtal input, is available in a 16-pin PDIP. (c) 1997 MX*COM Inc. www.mxcom.com Tele: 800 638-5577 910 744-5050 Fax: 910 744-5054 Doc. # 20480091.003 4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA All trademarks and service marks are held by their respective companies. Line- Powered Call Progress Detector 2 MX623 Preliminary Information Pin 1 2 3 4 5 Function Q3: Q2: Q1: Q0: Data Outputs: A 4-bit parallel data word, forming a HEX character representing the decoded tone frequency. This word is output after a successful decode. Table 1 details the Hex character output codes for the relevant decoded tone frequencies. Upon power-up this output is set to `EH', but no Data Change pulse generated. These are tri-state outputs. VDD: Positive supply rail. A minimum supply voltage of 3.0 volts is required. Levels and voltages within this decoder are dependent upon this supply. Signal In: The composite audio input. Signals to this pin should be a.c. coupled. The d.c. bias of the limiter section is set internally; this pin should not be loaded with any other circuitry. No internal connection. Leave open circuit. Xtal: The output of the on-chip clock oscillator inverter. No internal connection. Leave open circuit. Xtal/Clock: The input to the clock oscillator inverter. A 3.579545MHz Xtal or externally derived clock should be connected here (see Figure 2). VSS: Negative supply rail (GND). Hold: An input to control the Output Latch condition; employed in combination with the Data Change output to facilitate, if required, Interrupt and/or handshake operations with a Processor. With Hold placed "Low", with a tone input, the Data Change output will be held "High" at the next data change, and the current output code is locked in the Output Latches regardless of any changes to the input signal. The output code remains as held until this input is returned "High" (see Figure 3). While this input is "High" the output data, Q0 - Q3, cycles normally with the input audio. This pin has an internal 1.0M pullup resistor. PURS: Power-Up ReSet. To reset internal circuitry at power-up; a logic "1" level is required at this pin for a duration of at least 2.5ms after the Xtal/Clock input and full V DD levels are applied. The component configuration shown in Figure 2 is recommended; for slow-rising power supplies the time constant of components should be increased accordingly. IRQ: Interrupt Request. An output for Processor operation; normally "High" this output is latched "Low" when an internal data change occurs if the Chip Select input is "High". This output is reset ("High") the when Chip Select line is taken "Low". To permit "wire-OR" connection with other peripherals, this output has a low-impedance when "Low" and a high-impedance when "High". CS: Chip Select- A controlling function. When held "High" the Data Outputs Q0, Q1, Q2 and Q3 and the Data Change output are disabled. When taken "Low" the Data Outputs Q0, Q1, Q2 and Q3 and the Data Change output are enabled; the Interrupt Request (IRQ) is reset ("High") when CS is taken "Low". See Figures 3 and 4. Data Change: A positive-going pulse is generated at this output when the data changes (Tone or NOTONE). New tone-data is presented to the Q0, Q1, Q2 and Q3 Data Outputs if the Hold input is set "High". This is a tri-state output. 6 7 8 9 10 11 12 13 14 15 16 (c) 1997 MX*COM Inc. www.mxcom.com Tele: 800 638-5577 910 744-5050 Fax: 910 744-5054 Doc. # 20480091.003 4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA All trademarks and service marks are held by their respective companies. Line- Powered Call Progress Detector 3 MX623 Preliminary Information Application Information VDD DATA OUTPUTS A HEX Code Output representing the decoded tone frequency -- Q3 Q2 Q1 Q0 VDD 1 2 3 4 5 6 7 XTAL SIGNAL IN 16 15 14 DATA CHANGE CS IRQ PURS HOLD VSS XTAL/CLOCK R1 C1 VDD See Table 1 MX623P 13 12 11 10 9 C5 COMPOSITE SIGNAL IN C2 8 X1 C3 R2 C4 Component R1 R2 C1 C2 Value 1.0M 1.0M .047F .0047F Component Value C3 33.0pF C4 33.0pF C5 1.0F X1 3.579545MHz Tolerances R = 10%, C = 20% Figure 2 - Recommended External Components Band Edges (Hz) Nominal Lower Upper Center Edge Edge Freq. 364 488 520 580 386 412 436 463 900 1273 1350 1750 2062 386 520 580 618 412 436 463 487 1008 1325 1455 1855 2140 Hex Output Code Character Q3 Q2 Q1 Q0 0 1 2 3 4 5 6 7 8 9 A B C D E F 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 Timing Information With CS Low - Figure 3 After initial power-up and the Hold input inactive (High), as frequencies are input, with the Data Change output as an active (High) indicator, the data is presented at the Data Outputs. If/when the Hold input is placed active (Low), the data at the Data Outputs is frozen and the Data Change output held High at its next active excursion -until the Hold input is returned High. With the Hold input held High - Figure 4 As frequencies are input a correct decode will produce an active (Low) interrupt level. This interrupt (IRQ) is serviced and reset by an active (Low) CS input. Note the `valid data' period at the Data Outputs. 375 500 550 600 400 425 450 475 950 1300 1400 1800 2100 frequency not guaranteed frequency not guaranteed NOTONE Table 1 - Tone Decode Frequencies (c) 1997 MX*COM Inc. www.mxcom.com Tele: 800 638-5577 910 744-5050 Fax: 910 744-5054 Doc. # 20480091.003 4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA All trademarks and service marks are held by their respective companies. Line- Powered Call Progress Detector 4 MX623 Preliminary Information Application Information - Decoder Timing VDD t PURS PURS SIGNAL IN NOTONE Tone 1 Tone 2 Tone 3 Tone 'N' NOTONE t DE OUTPUTS Q0 to Q3 t RESP 'N' t NT t DC DATA CHANGE HOLD t HOLD t NORM t PUL Figure 3 - Timing with the Chip Select Input Held "Low"; CS and IRQ are not used VDD t PURS PURS SIGNAL IN NOTONE Tone 1 OUTPUTS Q0 - Q3 (INTERNAL) DATA CHANGE E F 1 t RIRQ IRQ t IR CS t ACS DATA OUT Q0 - Q3 TRI-STATE VALID DATA (READ DATA) t HIZ TRI-STATE VALID DATA (READ DATA) Figure 4 - Timing with the HOLD Input Held "High"; CS and IRQ are used (c) 1997 MX*COM Inc. www.mxcom.com Tele: 800 638-5577 910 744-5050 Fax: 910 744-5054 Doc. # 20480091.003 4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA All trademarks and service marks are held by their respective companies. Line- Powered Call Progress Detector 5 MX623 Preliminary Information Specifications Absolute Maximum Ratings Exceeding the maximum rating can result in device damage. Operation of the device outside the operating limits is not implied. Supply voltage Input voltage at any pin (ref VSS = 0V) Sink/source current (supply pins) (other pins) Total device dissipation @ TAMB 25C Derating Storage temperature range -0.3 to 7.0V -0.3 to (VDD + 0.3V) +/- 30mA +/- 20mA 800mW Max. 10mW/C -40C to +85C Operating Limits Supply Voltage (VDD) at 25C Operating Temperature Min. 3.0 -40 Max. 5.5 +85 Unit V C All device characteristics are measured under the following conditions unless otherwise specified: VDD = 3.3V TOP = 25 C Audio Level 0dB ref: = 775mVrms Xtal/Clock Frequency = 3.579545MHz Characteristics Static Values Supply Current Input Logic "1" Input Logic "0" Output Logic "1" Output Logic "0" Impedance CS and PURS Input Hold Input Signal Input IRQ Output (logic "1") IRQ Output (logic "0") Q0 - Q3 & Data-Change Outputs (logic "1") Q0 - Q3 & Data-Change Outputs (logic "0") Q0 - Q3 & Data-Change Outputs (high Z) Dynamic Values Signal Input Range Decode Bandedge Tolerance Xtal Inverter Voltage Gain Input Impedance Output Impedance Decoder Timing - Figures 3 and 4 Power Up Reset Time Data 'E' Time NOTONE to Tone Response Time See Note Min. 0.7 0.8 - Typ. 0.6 - Max. 1.0 0.3 0.2 Unit mA %VDD %VDD %VDD %VDD 1 10.0 0.5 0.1 1.0 30.0 175 0.7 175 - 100 500 2.0 500 - M M M k k M 2, 5 3 35.0 -1.0 - 1,166 1.0 mVrms % 20.0 10.0 - - 160 V/V M k tPURS tDE tRESP 4 2.5 31.0 - 27.0 50.0 ms ms ms (c) 1997 MX*COM Inc. www.mxcom.com Tele: 800 638-5577 910 744-5050 Fax: 910 744-5054 Doc. # 20480091.003 4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA All trademarks and service marks are held by their respective companies. Line- Powered Call Progress Detector 6 MX623 Preliminary Information Characteristics Tone to NOTONE Response Time Data to Data-Change Pulse Time Data-Change Pulse Width Hold to Data-Change Rise Time HOLD to Data-Change Fall Time IRQ Tone Response Time IRQ Reset Time Data Access Time CS High to Output Tri-State Time tNT tDC tPUL tHOLD tNORM tRIRQ tIR tACS tHIZ See Note 4 Min. 0.625 63.0 - Typ. 1.25 29.0 - Max. 60.0 1.15 150 52.0 250 250 100 Unit ms ms ms s s ms ns ns ns Notes 1. 2. 3. 4. 5. This pin has an on-chip 1.0M pullup resistor. An a.c. coupled sine or squarewave. See Table 1, Tone Decode Frequencies. Delay between the change of input (Tone/NOTONE) and the change at the Q0 - Q3 outputs. The signal input maximum value is determined by the formula VDD/2.83. A Package Tolerances DIM. A B C E E1 H J J1 K L P T Y MIN. TYP. MAX. 1.200 (30.48) 1.270 (32.26) 0.555 (14.04) 0.500 (12.70) 0.151 (3.84) 0.220 (5.59) 0.600 (15.24) 0.670 (17.02) 0.590 (14.99) 0.625 (15.88) 0.015 (0.38) 0.045 (1.14) 0.015 (0.38) 0.023 (0.58) 0.040 (1.02) 0.065 (1.65) 0.066 (1.67) 0.074 (1.88) 0.121 (3.07) 0.160 (4.05) 0.100 (2.54) 0.008 (0.20) 0.015 (0.38) 7 NOTE : All dimensions in inches (mm.) Angles are in degrees B E1 Y E PIN1 T K H L J J1 P C Figure 5: 16-pin PDIP Mechanical Outline: order as part no. MX623P (c) 1997 MX*COM Inc. www.mxcom.com Tele: 800 638-5577 910 744-5050 Fax: 910 744-5054 Doc. # 20480091.003 4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA All trademarks and service marks are held by their respective companies. |
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