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MC14LC5447DW Datasheet(PDF) 5 Page - Motorola, Inc |
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MC14LC5447DW Datasheet(HTML) 5 Page - Motorola, Inc |
5 / 12 page MC14LC5447 MOTOROLA 5 DOR Data Out Raw (Pin 14) This pin presents the output of the demodulator whenever CDO is low. This data stream includes the alternate 1 and 0 pattern, and the 150 ms of marking, which precedes the data. At all other times, DOR is held high. DOC Data Out Cooked (Pin 15) This output presents the output of the demodulator when- ever CDO is low, and when an internal validation sequence has been successfully passed. The output does not include the alternate 1 and 0 pattern. At all other times, DOC is held high. VDD Positive Power Supply (Pin 16) The digital supply pin, which is connected to the positive side of the power supply. APPLICATIONS INFORMATION The MC14LC5447 has been designed to be one of the main functional blocks in products targeted for the CLASS (Custom Local Area Signaling Service) market. CLASS is a set of subscriber features now being presented to the con- sumer by the RBOCs (Regional Bell Operating Companies) and independent TELCOs. Among CLASS features, such as distinctive ringing and selective call forwarding, the subscrib- er will also have available a service known as Calling Num- ber Delivery (CND) and message waiting. With these services, a subscriber will have the ability to display at a mini- mum, a message containing the phone number of the calling party, the date, and the time. A message containing only this information is known as a single format message, as shown in Figure 9. An extended message, known as multiple format message, can contain additional information as shown in Figure 10. The interface should be arranged to allow simplex data transmission from the terminating central office, to the CPE (Customer Premises Equipment), only when the CPE is in an on–hook state. The data will be transmitted in the silent peri- od between the first and second power ring after a voice path has been established. The data signaling interface should conform to Bell 202, which is described as follows: • Analog, phase coherent, frequency shift keying • Logical 1 (Mark) = 1200 ± 12 Hz • Logical 0 (Space) = 2200 ± 22 Hz • Transmission rate = 1200 bps • Application of data = serial, binary, asynchronous The transmission level from the terminating C.O. will be – 13.5 dBm ± 1.0. The expected worst case attenuation through the loop is expected to be – 20 dB. The receiver therefore, should have a sensitivity of approximately – 34.5 dBm to handle the worst case installations. Additional information on CLASS services can be obtained from: BELLCORE CUSTOMER SVS. 1–800–521–2673 201–699–5800 FOREIGN CALLS 201–699–0936 FAX The document number is: TA–NWT–000030 Title: “Voice Band Data Transmission Interface Generic Requirements” Figure 7 is a conceptual design of how the MC14LC5447 can be implemented into a product which will retrieve the in- coming message and convert it to EIA–232 levels for trans- mission to the serial port of a PC. With this message and appropriate software, the PC can be used to look up the name and any additional information associated with the call- er that had been previously stored. Figure 8 is a conceptual design of an adjunct unit in paral- lel with an existing phone. This arrangement gives the sub- scriber CND service without having to replace existing equipment. Table 1. Oscillator Specifications Clock Select Pin 11 = 1 Crystal Mode Parallel Frequency 3.579 MHz or 3.6864 MHz Rf 10 M Ω C1 and C2 30 pF Source: Fox Electronics 5570 Enterprise Pkwy. Ft. Myers, FL 33905 Tel. 813–693–0099 Clock Select Pin 11 = 0 Resonator #CSB455J Frequency 455 kHz ± 0.5% Rf 1.0 M Ω C1 and C2 100 pF Source: Murata Manufacturing Co. Ltd. 2200 Lake Park Dr. Smyma, GA 30080 Tel. 404–436–1300 RF OSCin C1 C2 OSCout NOTE: Motorola cannot recommend one supplier over another and in no way suggests that this is a complete listing. AR CH IVE D B Y F RE ES CA LE SE MI CO ND UC TO R, INC . |
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