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| Preliminary W91082N TONE GENERATOR WITH C SERIAL INTERFACE GENERAL DESCRIPTION The W91082N is Si-gate CMOS IC that provides DTMF signals. It can be programmed by a C to generate 16 dual tones and 8 single tones from the DTMF pin. The W91082N provides a serial mode interface for various applications such as cordless, KTS, PBX and Caller ID system. FEATURES * Operating voltage: 2.0V-5.5V * Generate 16 dual tones and 8 single tones * Serial mode interface with C * Uses 3.579545 MHz crystal or ceramic resonator * Packaged in 8-pin plastic DIP PIN CONFIGURATION CE XT1 XT1 VSS 1 2 3 4 8 7 6 5 VDD DTMF DATA CLK PIN DESCRIPTION SYMBOL CE PIN NO. 1 3, 2 I/O I I, O FUNCTION Chip enable signal, low active. A built-in inverter provides oscillation with an inexpensive 3.579545 MHz crystal or ceramic resonater. The crystal frequency deviation is 0.02%. Data input pin for serial receiving. Clock input pin for serial receiving. DTMF signal output pin. Power input pins. XT1, XT1 DATA CLK DTMF VDD, VSS 6 5 7 8, 4 I I O I -1- Publication Release Date: February 1998 Revision A1 Preliminary W91082N BLOCK DIAGRAM CE XT1 System Clock XT1 Tone Generator DTMF DATA CLK Serial Data Shift Register Control Circuit FUNCTIONAL DESCRIPTION The W91082N is a Tone generator with C serial interface. When chip enable ( CE pin goes to low level), the DATA and CLK pins receive the correspondent code to generate a DTMF signal. The W91082N defines every digit to have 5 bits code, and D0 (LSB) as the first received bit. The W91082N latches the data on the falling edge of the clock. The relationship between the digital codes and the tone output frequency is shown in Table1. The control timing waveform is shown in Figure 1. OSC. TOSC CE CLK D0 DATA Digit1 Digit2 Stop Code D4 D0 D4 D0 D4 DTMF Digit1 DTMF Signal Digit2 DTMF Signal Figure 1. Serial interface control timing waveform -2- Preliminary W91082N DIGIT 1 2 3 4 5 6 7 8 9 0 * # A B C D D4 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 D3 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 1 D2 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 0 0 0 0 0 1 1 1 1 - D1 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 0 1 1 0 0 1 1 - D0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 0 1 0 1 0 1 0 1 - TONE OUTPUT FREQUENCY (Hz) 697+1209 697+1336 697+1477 770+1209 770+1336 770+1477 852+1209 852+1336 852+1477 941+1336 941+1209 941+1477 697+1633 770+1633 852+1633 941+1633 697 770 852 941 1209 1336 1477 1633 DTMF OFF 1 Table 1. The relationship between data input and tone output frequency -3- Publication Release Date: February 1998 Revision A1 Preliminary W91082N ABSOLUTION MAXIMUM RATINGS PARAMETER DC Supply Voltage SYMBOL VDD-VSS VIL Input/Output Voltage VIH VOL VOH Power Dissipation Operating Temperature Storage Temperature PD TOPR TSTG RATING -0.3 to +7.0 VSS -0.3 VDD +0.3 VSS -0.3 VDD +0.3 120 -0.5 to +70 -55 to +125 mW C C V UNIT V Note: Exposure to conditions beyond those listed under Absolute Maximum Ratings may adversely affect the life and reliability of the device. ELECTRICAL CHARACTERISTICS DC CHARACTERISTICS (VDD-VSS = 2.5V. FOSC = 3.58 MHz, TA = 25 C, All outputs unloaded.) PARAMETER Operating Voltage Operating Current Standby Current Tone Output Voltage DTMF Distortion DTMF Output DC Level DTMF Output Sink Current SYMBOL VDD IOP ISB VTO THD VTDC ITL CONDITIONS CE = 0, Unloaded CE = 1, Unloaded MIN. 2.0 1.0 0.2 TYP. 0.3 150 -30 - MAX. 5.5 1.0 1 170 -23 3.0 - UNIT V mA A mVrms dB V mA Row group RL = 10 K RL = 10 K VDD = 2.0 to 5.5V VDD = 2.0 to 5.5V VTO = 0.5V -4- Preliminary W91082N AC CHARACTERISTICS (VDD-VSS = 2.5V , FOSC. = 3.58 MHz , TA = 25 C, All outputs unloaded.) PARAMETER OSC. Starting Time Clock Input Rate System Frequency SYMBOL TOSC FCLK FOSC CONDITIONS - MIN. - TYP. 100 3.5795 MAX. 10 500 - UNIT mS KHz MHz Headquarters Winbond Electronics (H.K.) Ltd. Rm. 803, World Trade Square, Tower II, No. 4, Creation Rd. III, 123 Hoi Bun Rd., Kwun Tong, Science-Based Industrial Park, Kowloon, Hong Kong Hsinchu, Taiwan TEL: 852-27513100 TEL: 886-3-5770066 FAX: 852-27552064 FAX: 886-3-5792766 http://www.winbond.com.tw/ Voice & Fax-on-demand: 886-2-27197006 Winbond Electronics North America Corp. Winbond Memory Lab. Winbond Microelectronics Corp. Winbond Systems Lab. 2727 N. First Street, San Jose, CA 95134, U.S.A. TEL: 408-9436666 FAX: 408-5441798 Taipei Office 11F, No. 115, Sec. 3, Min-Sheng East Rd., Taipei, Taiwan TEL: 886-2-27190505 FAX: 886-2-27197502 Note: All data and specifications are subject to change without notice. -5- Publication Release Date: February 1998 Revision A1 |
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