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EM91440C Dataheets PDF



Part Number EM91440C
Manufacturers ELAN Microelectronics Corp
Logo ELAN Microelectronics Corp
Description TONE/PULSE SWITCHABLE DIALER WITH LCD INTERFACE AND DUAL-TONE MELODY GENERATOR
Datasheet EM91440C DatasheetEM91440C Datasheet (PDF)

TONE/PULSE SWITCHABLE DIALER WITH LCD INTERFACE TONE/PULSE SWITCHABLE DIALER WITH LCD INTERFACE AND DUAL-TONE MELODY GENERATOR AND DUAL-TONE MELODY GENERATOR EM91440 SERIES EM91440 SERIES GENERAL DESCRIPTION The EM91440 is a series of tone/pulse switchable dialers that is composed of T/P dialer and T/P dialer with 40-set memories. The EM91440 series provide necessary functions of telephone set for application in any environment, such as Pulse dialing, Tone (DTMF) dialing, Handfree dialing, key.

  EM91440C   EM91440C



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TONE/PULSE SWITCHABLE DIALER WITH LCD INTERFACE TONE/PULSE SWITCHABLE DIALER WITH LCD INTERFACE AND DUAL-TONE MELODY GENERATOR AND DUAL-TONE MELODY GENERATOR EM91440 SERIES EM91440 SERIES GENERAL DESCRIPTION The EM91440 is a series of tone/pulse switchable dialers that is composed of T/P dialer and T/P dialer with 40-set memories. The EM91440 series provide necessary functions of telephone set for application in any environment, such as Pulse dialing, Tone (DTMF) dialing, Handfree dialing, keying tone ,and lock functions. The lock function is designed to inhibit toll dialing operation. Beside this, melody generator, ring detector and SDO (Serial Data Output) functions are provided in advance version. Melody generator will output dual-tone music in line hold duration. Ring detector can prevent illegal dialing from pocket dialer. The SDO is designed to drive LCD driver and voice synthesizer. In this application, the dialing numbers can be displayed on LCD screen with EM32100 ( or EM32116 ). FEATURES • Tone/Pulse switchable. • Wide operating voltage from 2.0 V to 5.5 V. • Low operating current, 0.15 mA (Pulse) and 0.3 mA (Tone) typically. • Adding resistor on keyboard scan pin that can select many telephone specifications, such as : Pulse rate, M/B ratio, Flash time, lock dialing functions. • SDO function supports LCD driver and voice synthesizer to indicate dialing numbers. • Line hold function is designed for stopping conversation temporality. • Melody generator provides music on hold function. • Lock function provides conventionality key lock and password lock operations. • Ring detector is designed to prevent illegal dialing from pocket dialer. • 40-set three touch repertory memory, each one can hold data up to 16 digits. • A 32-digit LNB (last number) redial memory. • Keytone function provides rapidly keying recognition. • Handfree function provides on-hook dialing and speakerphone application. • Pause and P-T time are fixed to 3.6 seconds. • Tone duration and inter-tone pause time are fixed to 98 ms. • Using 3.579545 MHz crystal or ceramic resonator. • Package forms: PDIP, skinny. ORDERING INFORMATION Versions list and function outline VERSION LNB KT EM91440A √ √ EM91440B √ √ EM91440C √ √ EM91440D √ √ Note : PDP = Pocket Dialer Prevented HOLD(music) √ √ √ √ LOCK √ √ √ √ HF √ √ √ SDO(LCD) PDP √ √ √ * This specification are subject to be changed without notice. 10.1.1997 1 EM91440 SERIES TONE/PULSE SWITCHABLE DIALER WITH LCD INTERFACE AND DUAL-TONE MELODY GENERATOR EM91440 Pin Assignment EM91440AP COL5 COL4/KT COL3 COL2 COL1 XIN XOUT XMUTE VSS 1 2 3 4 5 6 7 8 9 18 17 16 15 14 13 12 11 10 HDO PO ROW4 ROW3 ROW2 ROW1 HKS VDD DTMF EM91440BP COL5 COL4/KT COL3 COL2 COL1 XIN XOUT XMUTE VSS HFI 1 2 3 4 5 6 7 8 9 10 20 19 18 17 16 15 14 13 12 11 HDO PO ROW4 ROW3 ROW2 ROW1 HKS VDD DTMF HFO EM91440CK NC COL5 COL4/KT COL3 COL2 COL1 XIN XOUT XMUTE VSS HFI 1 2 3 4 5 6 7 8 9 10 11 22 21 20 19 18 17 16 15 14 13 12 SDO HDO PO ROW4 ROW3 ROW2 ROW1 HKS VDD DTMF HFO EM91440DK NC COL5 COL4/KT COL3 COL2 COL1 XIN XOUT XMUTE VSS HFI DRING 1 2 3 4 5 6 7 8 9 10 11 12 24 23 22 21 20 19 18 17 16 15 14 13 SDO HDO PO ROW4 ROW3 ROW2 ROW1 HKS VDD DTMF HFO RMUTE Keyboard Arrangement ROW1 ROW2 ROW3 ROW4 COL1 1 4 7 */T COL2 2 5 8 0 COL3 3 6 9 # COL4/KT HD F A RD/P COL5 ST * This specification are subject to be changed without notice. 10.1.1997 2 EM91440 SERIES TONE/PULSE SWITCHABLE DIALER WITH LCD INTERFACE AND DUAL-TONE MELODY GENERATOR FUNCTIONAL BLOCK DIAGRAM RMUTE SDO HFO HDO COL1 COL2 COL3 COL4/KT COL5 XMUTE Row/Column programming counter Keyboard interface (column) Output circuit Memory (Melody) XIN XOUT Oscillator latch & decoder D/A converter DTMF Timing/Control circuit ROW1 ROW2 ROW3 ROW4 VDD HFI HKS DRING VDD Keyboard interface (Row) Input circuit Pulse generator PO PIN DESCRIPTIONS Symbol ROW1~ROW4 Function Keyboard scan pins of row group. In idle state (HKS is “High” and HFO is “Low”), these pins stay “High impedance” level to prevent power consumption. Otherwise, these pins switch to “High” level for detecting keyboard entry. These pins will output 600 Hz signal while keyboard is scanning. Keyboard scan pins of column group. In idle state, these pins stay “High impedance” level. Otherwise these pins switch to “Low” level for detecting keyboard entry. These pins will output 600 Hz signal while keyboard is scanning. The fourth column group pin of the keyboard that also provides the keytone output . Normally, this pin stays “Low” level for detecting keyboard entry. After a valid keyboard entry, this pin will output keying confirmation tone that is 600 Hz signal and 30 ms duration. To prevent signal interference, while DTMF issue, it will disable key tone output except function key. Oscillator input and output pins. A 3.579545 MHz crystal or ceramic resonator must be crossed connection to XIN and XOUT pins which generate system clock. The Tone/Pulse MUTE signal output pin that is NMOS open-drain o.


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